automatic coin operated mobile batery charger

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 1

PLAN OF WORK

Weekly work

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 1

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

11 WEEKLY WORK

1st week Project Name selection

1st week Literature Survey

1st week Problem Definition

2nd week Block diagram

3rd to 5th week Details of individual block

6th week Rough circuit diagram

7th week Availability of parts in market

8th week Purchasing parts

8th week Testing individual Parts

8th week Finalizing circuit diagram

9th week PCB designing

9th amp10th week Soldering of parts

11th week Testing amp troubleshooting each module

12th week Complete testing of final circuit

13th week Writing individual module of software

14th amp15th week Final testing of software module

16th week Final testing of hardware amp software

17th week Finishing final project

17th amp18th week Report preparation

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 2

Table 11 Table for Weekly work

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 2

INTRODUCTION

Introduction Functional descriptionTechnology used

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

21 Introduction

With mobile phones becoming the major source of businesspersonal

communication the mobile phone business is currently worth billions of dollars and

supports millions of phones

The need to provide a public charging service is essential Many critics argued that a

public mobile phone charging service is not a lucrative business because most users can

charge their phones at home in their office or in their cars

Emergency Coin Operated Mobile Phone Charger is a new business milestone

because many are attending business conventions and forgetting their charger at home or in

hotel rooms

Students and many that use the public transportation that dont know that their level

of their battery is low are prospective customers for coin operated mobile phone charger

service

Recommended locations include Hotels conference centers exhibition halls

serviced offices exchange halls motels leisure centers health clubs training centers golf

clubs retail outlets shopping malls Internet cafes universities colleges hall of residence

airports train terminals etc so that the mobile phone users can reactivate a low or dead

battery by simply plugging in and charging for as low as one rupees

22 Functional description

The coin operated public cell phone charger is a cell phone charging station having

four charging channels providing charging facility to various type of cell phones The

number of channels can be increased further Each channel can be operated simultaneously

Each and every channel is having a select switch which can be called as channel

select switch with a red LED as an indicator for selected channel Also there is a START

switch and a COIN inlet which is common for all the channels

The operation of coin operated chargers is very simple The user who wishes to

charge his cell phone has to first check out for the compatible charger jack in a channel

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Then he has to press select switch in order to make channel ready for charging the

selected channel will be indicated by a red LED

The channel will remain in selected mode for 30 sec Hence within 30 sec the user

has to first insert the predefined rupee coin and then has to press START switch which will

finally start the charging process for a predefined time and is indicated by a green LED

If failing to do so within 1 min will reset the channel and the user has to again

follow the same procedure

Any other channel selection is not considered within 30 sec of previous channel if

selected or until it has entered in to charging mode

Completion of charging will be indicated by an OFF green LED

23 Technology Used

Coin recognition using proximity switch(metal detector)

Constant voltage charger

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 3

DEVELOPMENT

STAGES amp

PROCESS

Development stages and process of the project

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

31 DEVELOPMENT STAGES amp PROCESS

The complete development of this project can be divided into the following stages

Problem definition stage

Designing block diagram

Implementing circuits and components

Developing algorithm for software

Writing actual code for Microcontroller

Compiling the code

Burning the hex file into microcontroller with programmer

Testing and Running

311 Problem definition stage

This is the very first stage to develop any project It actually defines the aim

and the concept of the project At inconvenient times when access to a standard

charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

designed to solve this problem The charger operates like a vending machine all a

user has to do is plug the mobile phone into one of the four adapters and insert a

coin the phone will then be given a micro-pulse fast charge in just 10 minutes

312 Designing block diagram

At this stage we have categorized the whole system into different individual

modules These modules (block diagrams) will be helpful in understanding the

concept and working of the integrated system It also simplifies the entire debugging

and testing process

313 Implementing circuits and components

This is the actual implementation of circuit of each block At this stage we

have actually designed each block separately and finally integrated them into the

complete working system

314 Developing for software

To get the logical flow of the software the development of algorithm having

a prominent role So that we have to analyze the complete system and organized the

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

algorithm in such a manner that one can understand the complete working of the

software

315 Writing actual code for Microcontroller

After the development of the algorithm and flowchart we have actually

translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

that it can understand the instructions and run as per our requirement The

instructions are in ANSII C Language

316 Compiling the code

The hand written code on paper was then transferred into computer For that

we have used Keil pre-install on PC The Keil is a Computer Aided Program to

simulate the working of Microcontroller in real time without burning the software

into actual IC We simulated and compiled our program for error checking After

removing several compiling errors the program was converted into machine language

ie Philips hex format

317 Burning the hex file into microcontroller with Programmer

In this stage the compiled hex format file was downloaded or burned into

flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

system programming software provided by the manufacturer itself

318 Testing and Running

This time we tested our project for actual working after loading the Software

into the microcontroller Any errors found were removed successfully This is the last

and final stage of development of our project

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 4

BLOCK DIAGRAM

OF THE PROJECT

Block Diagram Brief Explanation

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

41 Block Diagram

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

Fig 41 Block diagram of the project

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

42 Brief Explanation

421 POWER SUPPLY

Power supply is used to deliver power to the circuit It delivers +5Vdc to

microcontroller and other peripherals and +12Vdc delivers power to relay

422 COIN INPUT AND LEVEL CONVERTOR

Coin input is a sensor which senses a metal and produces an output voltage This

voltage is high as compared to the input required for microcontroller

Hence a level shifter is used to bring down the voltage level which could be

readable to microcontroller

423 START SWITCH

Start switch is used to start the charging process of a

mobile phone

424 RS232 INTERFACING TO PC

RS 232 is a protocol used for communication between

computer and microcontroller It is also used for

programming the microcontroller in its ISP (in system

programming) mode

425 CHANNEL READY INDICATOR

It provides visual indication for the channel which is in

charging mode

426 DARLINGTON PAIR ARRAY

Darlington pair array is used as a relay driver

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

427 CHANNEL IN CHARGE INDICATION

It provides visual indication for the channel which is in

charging mode

428 RELAY ARRAY

Relay array consists of relays for each channel to

provide electromechanical switching in between charger and

mobile phone

429 CHARGER ARRAY

Charger array is used to provide charging power to the

mobile phones through the electromechanical switches

4210 CELL PHONE TO CHARGE

Channel select switch is used for selecting a channel on

which the mobile phone is to be charged

4211 MICROCONTROLLER

Microcontroller is used to control the whole operation of

the device Microcontroller reads input signal from input

device and triggers the output device According to the

conditions defined in the microcontroller by the programmer

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 5

CIRCUIT

DIAGRAM

EXPLANATION

Circuit diagram

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Circuit diagram explanation Working

51 POWER SUPPLY CIRCUIT

511 CIRCUIT DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

Fig51 Circuit diagram of the power supply

Bridge RectifierTRANSFORMER

Filter Voltage regulator Load

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

512 WORKING

Transformer

A step-down transformer is used to achieve our requirements of the power

supply It steps down high voltage ac mains to low voltage ac mains

Bridge Rectifier

A bridge rectifier makes use four diodes in a bridge arrangement to achieve

full wave rectification This is a widely used configuration both with individual

diodes wired and with single component bridges where the diode bridge is wired

internally It also converts ac to dc but the dc output is varying

One advantage of a bridge rectifier over a conventional full-wave rectifier is

that with a given transformer the bridge rectifier produces a voltage output that is

nearly twice that of the conventional full-wave circuit

Filter

The output of the rectifier is a pulsating dc wave We need a constant dc

output To do this we need to filter out the oscillation from the pulsating dc wave

This is obtained with a diode capacitor combination

Voltage Regulator

A voltage regulator is used for voltage regulation in the circuit This provides

a protection to the circuits in the case of fluctuations It eliminates ripples by setting

dc output to fixed voltages

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

Fig 52 Block diagram of the power supply

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Load

The load can be anything which wants to switch ON by using power supply

513 CIRCUIT DIAGRAM EXPLANATION

Regulated power supplies are commonly used in engineering projects Power

supply is food of any circuit

+5V SUPPLY UNIT

+5V supply is obtained from the +5V supply unit for microcontroller and

digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

transformer having a capacity of 500mA

Since the input voltage to the regulator IC should be more than its output

voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

smooth DC supply The rating of the chosen capacitor filter is 1000microF

The regulated DC voltage is obtained by using a regulator IC 7805 In the

case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

output of regulator IC to eliminate the voltage oscillations at the output due to the large

voltage oscillations at the input of the regulator

+12V SUPPLY UNIT

The plusmn12 V supply required by the relay is provided by the 12V supply circuit

arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

step down transformer having a capacity of 1A and the center tap of the transformer is

grounded This low voltage is rectified with the help off bridge rectifier

Since the input voltage to the regulator IC should be more than its output

voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

7912 is used

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

connected at the output as shown in figure to eliminate the voltage oscillations at the

output due to the large voltage oscillations at the input of the regulator

52 CONSTANT VOLTAGE CHARGER

521 CIRCUIT DIAGRAM

Fig 53 Circuit diagram of the battery charger

522 CIRCUIT DIAGRAM EXPLANATION

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Constant-voltage (often called constant-potential) chargers maintain nearly the same

voltage input to the battery throughout the charging process regardless of the batterys state

of charge Constant-voltage chargers provide a high initial current to the battery because of

the greater potential difference between the battery and charger

A constant-voltage charger may return as much as 70 of the previous discharge in

the first 30 minutes This proves useful in many battery applications involving multiple

discharge scenarios As the battery charges its voltage increases quickly This reduces the

potential that has been driving the current with a corresponding rapid decrease in charge

current as depicted in the illustration below As a result even though the battery reaches

partial charge quickly obtaining a full charge requires prolonged charging

Given this behavior constant-voltage chargers are frequently found in applications

that normally allow extended charging periods to attain full charge Constant-voltage

chargers should not be used where there is frequent cycling of the battery Repeated

discharges without returning the cell to its full charge will eventually decrease the battery

capacity and may damage individual cells

Fig 54An Illustration graph of the charging function of constant battery charger

Constant-voltage chargers are most often used in two very different modes as a fast

charger to restore a high percentage of charge in a short time or as a float charger to

minimize the effects of overcharge on batteries having infrequent discharges

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

53 RELAY DRIVER CIRCUIT

531 CIRCUIT DIAGRAM

532 CIRCUIT DIAGRAM EXPLANATION

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

Fig 55 Relay driver circuit

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Input from the controller is connected to the relay card through connector J1 which

carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

is used to connect power supply to relay card

533 WORKING

While taking Relay1 (RL1) into consideration we will discuss the working of relay

card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

of the IC are in cut off region which causes an open circuit so there is no current flow

flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

applied to the two pin1 of IC U1 the internal transistor goes in to active region and

completes the path ie provide ground to the relay coil so the current flows through the

LED activating the relay

As the current flows through the relay coil it gets energized and switch over the

contacts ie common and normally open contact get connected and provide a path to flow

current from J11 ie charger into the load connected at J4 hence the cell phone charging

process starts The same above process is applies for all relays If LED is fused or

damaged the path will be open and relay will not be energized and if relay is damaged the

led will not be illuminated So the LED here is used as a FAULT indicator and a

CHARGING ON indicator

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

54 MICROCONTORLLER CIRCUIT

541 CIRCUIT DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

542 CIRCUIT DIAGRAM EXPLANATION

CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

port P04 through J4 and START switch is connected to port P05 through SW5

Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

Output for relay card is taken on port P14 to P17

Components C1 R1 and push button S1 forms reset circuit which provides a power

on reset for the micro controller and even provide manual reset Crystal XL1 is a

110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

22pf capacitor used as loading capacitor for crystal

Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

RN2 resistance network

IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

the proximity switch and microcontroller and convert its output readable to microcontroller

IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

communication between PC and a microcontroller through connector J3

Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

communication process

Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

power supply connection

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

543 PORT ASSIGNMENTS FOR 89V51RD2FN

P00 = switch1 for channel 1

P01 = switch2 for channel 2

P02 = switch3 for channel 3

P03 = switch4 for channel 4

P04 = switch5 for coin input sensor (proximity switch)

P05 = switch6 for start charging

P10 = channel 1 red LED1 (ready system)

P11 = channel 2 red LED2 (ready system2)

P12 = channel 3 red LED3 (ready system3)

P13 = channel 4 red LED4 (ready system4)

P14 = channel 1 relay (start system1)

P15 = channel 2 relay (start system2)

P16 = channel 3 relay (start system3)

P17 = channel 4 relay (start system4)

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 6

LIST OF THE

COMPONENTS

List of the components

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ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

61 LIST OF THE COMPONETS

RESISTORS

CAPACITORS

LIGHT EMITING DIODES (LEDS)- Green Red

RELAYrsquoS-

TRANSFORMERS

RECTIFIER BRIDGES (W 10)

OSCILLATOR

SWITCHES- Push switches

DARLINGTON PAIR IC (ULN2003a)

SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

SERIAL COMMUNICATION DRIVER IC (MAX 232)

OPTOCOUPLER IC (4N33)

MICROCONTROLLER IC (89V51 RD2)

RELIMATE CONNECTOR- 2 pin amp 4 pin

RS-232 PORT CONNECTOR

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 7

INTRODUCTION

OF COMPONENTS

Working of components

Features or Uses of components

Testing of components

71 RESISTOR

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

711 WORKING

Resistors limit current Resistors are considered to be the most used and the most

important component of all the electronic circuits Resistors resist the flow of electrical

current The higher the value of resistance (measured in ohms)

the lower the current will be

712 TESTING

Read the indicated color code value then select the OHM-scale within but not way

below the indicated value A resistor is good if its resistance is close to the indicated

Tolerance should be considered with the ohmmeter reading While no resistance reading at

all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

ohmmeter scale settings resistor is shorted

713 SPECIFICATIONS

To completely specify a resistors characteristics requires knowledge of the following

parameters-

bull Value

bull Tolerance

bull Temperature Coefficient

bull Power Rating

The specification of a resistor may be marked on its surface using either of two

systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

the second more recent system uses a combination of alpha-numeric characters

7 2 CAPACITOR

721 WORKING

When DC voltage is applied to the capacitor an electric charge is stored on each

electrode While the capacitor is charging up current flows The current will stop flowing

when the capacitor has fully charged Capacitors find use

in circuits for a variety of purposes They are used in

time delay generation RC circuits In power supplies for filtering and power supply

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

decoupling as blocking capacitors for power factor correction and motor starting in LC

tank circuits and so on

722 TESTING

To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

negative probe to the capacitor positive terminal the positive probe to the negative terminal

A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

and moves back again to infinite resistance position A defective indication for an

electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

which is an indication that the capacitor is shorted

73 LIGHT EMITING DIODE (LED)

731 WORKING

LEDs are special diodes that emit light when

connected in a circuit They are frequently used as pilot lights in electronic appliances to

indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

the heart of an LED the semi-conductor chip

In our project Green LED are used here for mainly two purpose

a Charging ON indication (when ON)

b Channel fault indication (always OFF)

732 TESTING

The good and working LED will then light up or glow a busted LED will not LEDs

must have a resistor in series to limit the current to a safe value for quick testing purposes a

1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

directly connected to a battery or power supply It will be destroyed the LED

733 FEATURES

Single color

High bright output

Low power consumption

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

High reliability and long life

734 Descriptions

Dice material GaInN

Emitting Color Super Bright White

Device Outlineφ5mm Round Type

Lens Type Water Clear

74 RELAY

741 WORKING

A relay is an electrically operated switch Current

flowing through the coil of the relay creates a magnetic field

which attracts a lever and changes the switch contacts The coil

current can be on or off so relays have two switch positions and

most have double throw (changeover) switch contacts

Relays are like remote control switches and are used in

many applications because of their relative simplicity long life

and proven high reliability

742 USES

The main operation of a relay comes in places where only a low-power signal can be

used to control a circuit

It is also used in places where only one signal can be used to control a lot of circuits

The application of relays started during the invention of telephones They played an

important role in switching calls in telephone exchanges They were also used in

long distance telegraphy They were used to switch the signal coming from one

source to another destination

743 TESTING

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

A relay will usually have a coil pole terminal and a set of

contacts The set of contacts that are open when the relay is not

energized are called normally open (NO) contacts and the set of

contacts that are closed when the relay is not energized are called

normally closed (NC) contacts The following steps can be used to perform the testing of

the relay using a multimeter

Keep the multimeter in the continuity check mode

Check for continuity between the NC contacts and pole

Check for discontinuity between NO contacts and the pole

Now energies the relay using the rated voltage For example use a 9V battery for

energizing a 9V relay The relay will engage with clicking sound

Now check for continuity between NO contacts and pole

Also check for discontinuity between NC contacts and pole

As a final test measure the resistance of the relay coil using a multimeter and check

whether it is matching to the value stated by the manufacturer

If all the above tests are positive we can conclude that the relay is healthy

75 TRANSFORMER

751 WORKING

A transformer is a device that transfers electrical energy

from one circuit to another through inductively coupled

electrical conductors A changing current in the first circuit (the

primary) creates a changing magnetic field

This changing magnetic field induces a changing voltage in the second circuit (the

secondary) This effect is called mutual induction

If a load is connected to the secondary circuit electric charge will flow in the

secondary winding of the transformer and transfer energy from the primary circuit to the

load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

number of primary turns

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

By appropriate selection of the numbers of turns a transformer thus allows an

alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

making it less

752 TESTING

1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

scale and then adjusting the knob to verify its reading is an easy step to the

reading of the ohm

2 To check the resistance of the coil unplug or unsolder the leads of the

transformer from its circuit and measure the resistance of each coil

3 The next step is to test each coil for shorts to other coils

76 RECTIFIER BRIDGE (W 10)

761 WORKING

A diode bridge rectifier is a device for converting AC or

alternating current electricity into DC or direct current AC

electricity goes from positive to negative constantly whereas DC

always flows in the same direction

AC electricity is more efficient to transmit and easier to

convert into different voltages However most appliances need DC current to run A diode

bridge rectifier is the most common type of power supply used to provide this current In

our project W10 is a bridge rectifier which provides on single semiconductor chip

77 OSCILLATOR

771 Working

An oscillator puts out an endless series of pulses The output

constantly goes from 0 volts to Vcc and back to 0 volts again Almost

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

all digital circuits have some type of oscillator This stream of output pulses is often

called a clock One of the most important features of any oscillator is its frequency stability

or in other words its ability to provide a constant frequency output under varying load

conditions Some of the factors that affect the frequency stability of an oscillator include

temperature variations in the load and changes in the DC power supply Frequency stability

of the output signal can be improved by the proper selection of the components used for the

resonant feedback circuit including the amplifier but there is a limit to the stability that can

be obtained from normal LC and RC tank circuits

In our project instead of 12MHz crystal 110592MHz is used because it can be

divided to give you exact clock rates for most of the common baud rates for the UART

especially for the higher speeds (9600 19200) These crystals are readily available and

commonly used

78 SWITCH

781 WORKING

The most familiar form of switch is a manually operated

electromechanical device with one or more sets of electrical contacts

Each set of contacts can be in one of two states either closed meaning

the contacts are touching and electricity can flow between them or

open meaning the contacts are separated and the switch is non

conducting The mechanism actuating the transition between these two

states (open or closed) can be either a toggle (flip switch for continuous on or off) or

momentary (push-for on or push-for off) type

782 USES

In electronics a switch is an electrical component that can break an electrical

circuit interrupting the current or diverting it from one conductor to another

783 TESTING

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

When the switch is ON it looks and acts like a wire When the switch is OFF there is

no connection Switch can tested by using multimeter in continuity range

79 DARLINGTON PAIR IC (ULN2003a)

791 WORKING

The Darlington transistor (often called a Darlington pair) is a

compound structure consisting of two bipolar transistors (either

integrated or separated devices) connected in such a way that the

current amplified by the first transistor is amplified further by the

second one This configuration gives a much higher current gain than

each transistor taken separately and in the case of integrated devices

can take less space than two individual transistors because they can

use a shared collector

Integrated Darlington pairs come packaged singly in

transistor-like packages or as an array of devices (usually eight) in an integrated circuit

The Darlington transistor array used is ULN2003 Applications include relay

drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

drivers and logic buffers Each input of this device has a zener diode and resistor in series

to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

for each Darlington pair for operation directly with TTL or 5-V CMOS devices

792 FEATURES

The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

with common-cathode clamp diodes for switching inductive loads The collector-current

rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

higher current capability

710 SERIES VOLTAGE REGULATER IC (78XX)

7101 WORKING

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Voltage Regulator (regulator) usually having three legs converts varying input

voltage and produces a constant regulated output voltage They are available in a variety of

outputs

The most common part numbers start with the numbers 78 or 79 and finish with two

digits indicating the output voltage The number 78 represents positive voltage and 79

negative one The 78XX series of voltage regulators are designed for positive input

The LM78XX series typically has the ability to drive current up to 1A For

application requirements up to 150mA 78LXX can be used As mentioned above the

component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

an output leg with the regulators voltage

As a general rule the input voltage should be limited to 2 to 3 volts above the output

voltage The LM78XX series can handle up to 36 volts input be advised that the power

difference between the input and output appears as heat If the input voltage is unnecessarily

high the regulator will overheat Unless sufficient heat dissipation is provided through heat

sinking the regulator will shut down

711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

7111 WORKING

The MAX-232 It includes a Charge Pump which generates

+10V and -10V from a single 5v supply

This IC also includes two receivers and two transmitters in

the same package This is handy in many cases when we only want to

use the Transmit and Receive data Lines We dont need to use two chips one for the

receive line and one for the transmit There are also many variations of these devices The

large value of capacitors are not only bulky but also expensive Therefore other devices are

available which use smaller capacitors and even some with inbuilt capacitors However the

MAX-232 is the most common and thus we will use this RS-232 Level Converter

Dual Charge-Pump Voltage Converter

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

output

712 OPTOCOUPLER IC (4N33)

7121 WORKING

In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

photoMOS) is a device that uses a short optical transmission path to transfer a signal

between elements of a circuit typically a transmitter and a receiver while keeping them

electrically isolated mdash since the signal goes from an electrical signal to an optical signal

back to an electrical signal electrical contact along the path is broken

Optocouplers typically come in a small 6-pin or 8-pin IC package but are

essentially a combination of two distinct devices an optical transmitter typically a gallium

arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

light-triggered diac The two are separated by a transparent barrier which blocks any

electrical current flow between the two but does allow the passage of light

The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

of isolation between driving and load circuits These Optocouplers can be used to replace

reed and mercury relays with advantages of long life high speed switching and elimination

of magnetic field

713 MICROCONTROLLER IC (89V51 RD 2 )

713 WORKING

The P89V51RD2 is an 80C51 microcontroller with 64

kB Flash and 1024 bytes of data RAM

A key feature of the P89V51RD2 is its X2 mode option

The design engineer can choose to run the application with the conventional 80C51 clock

rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

achieve twice the throughput at the same clock frequency Another way to benefit from this

feature is to keep the same performance by reducing the clock frequency by half thus

dramatically reducing the EMI

The Flash program memory supports both parallel programming and in serial In-

System Programming (ISP) Parallel programming mode offers gang-programming at high

speed reducing programming costs and time to market ISP allows a device to be

reprogrammed in the end product under software control The capability to fieldupdate the

application firmware makes a wide range of applications possible The P89V51RD2 is also

In-Application Programmable (IAP) allowing the Flash program memory to be

reconfigured even while the application is running

714 RELIMATE CONNECTOR

7141 WORKING

These are wire to board type connectors used to facilitate

proper and firm electrical connection between the relay card and

microcontroller card

The connector has following specifications

No of Ways 2-20

Voltage Rating 250V AC DC

Current Rating 3A AC DC

Contact Resistance 20mW max

Insulation Resistance 1000MW min

Dielectric Withstanding 1000V ACminute

Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

connector is it provides a fast and easy connection and disconnection it also avoids polarity

conflicts

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

715 RS-232 PORT CONNECTOR

7151 WORKING

Almost all digital devices which we use require either TTL

or CMOS logic levels Therefore the first step to connecting a

device to the RS-232 port is to transform the RS-232 levels back

into 0 and 5 Volts This is done by RS-232 Level Converters

Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

problem in many instances where only a single supply of +5V is present

CHAPTER 8

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

IMPLIMENTATION

OF THE PCB

Components layout designing

Developing or Etching the PCB

Other operations like Drilling Cutting Tinning

81 IMPLIMENTATION OF THE PCB

A proper PCB ensure that various circuit components are interconnected as per the

circuit diagram once they have been placed on the PCB in their proper positions and

subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

base material to which is permanently attached a flat metallic network of conducting path

whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

for this project is single one

The basic material used may be resin coated paper fiber glass ceramic and the flat

board configuration however is most widely used and it may be of the nature of the single

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

which ensures adequate and permanent low resistance coupling

811 BOARD DESIGN

PCB designed is the most important and requires great care during work In this case

great care must be taken while tracing the circuit or layout on the board Because once PCB

is designed it is virtually impossible to alter it While designing a circuit designer should

take care to avoid crossing of conducting path (tracks) as possible Crossover are

unavoidable then only of the jumper can be used A circuit board carrying on both sides can

also help to solve this problem when circuit is complicated

812 THE MASTER DIAGRAM

The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

which is commonly made twice as the finished circuit since this makes the working on that

much easier especially when circuit is complicated photography eventually reduces the

size of diagram to that of the circuit before proceeding we must know some rules regarding

the designing -

a The space between the conductors must be strictly controlled to avoid the possibility

of electrical discharges or unwanted capacitance The amount by which the mater

diagram is to reduce in size is thus a critical deign feature

b The conductor must be wider in those part of the circuits that are going to handle

large current must be handle without undue temperature of conductors

c The minimum width of copper should not generally be less than about 15mmThis

is related to mechanical strength rather than electrical properties and it also ensure

that strips remains securely bounded to the base material

d The points where the component holes for component lead wire occurs must be sited

to suit the dimensions of the component and dimensions between lead-out wire so

that the components can be situated correctly on finished board The conductor is

also main large at the point of holes

813 PCB MAKING

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

When the mater diagram probable twice the size of real PCB has been evolved the

test major step consists of etching or dissolving the unwanted metal from copper claded

board to create a circuit as depicted by master diagram It must be stressed that very

accurate checking master is essential at this stage Then the master point is mounted on a

special frame on easy facing of a larger camera and with the aid of the very powerful

illumination a master diagram is clearly photographed on a glass sensitive plate This is

developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

brought into operation This comprises the camera body mounted so that sideways after

each exposure In this way number of copies of the original master diagram is set out

exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

In case of simple and need of number of less PCB economic and advisable to use the

following lab method of PCB making

Planning The Circuit

It is not a particular difficult There are several important factors that need not be

taken into account if the finished device is to work properly we must consider gain factor

and ensure that the input and output parts are sufficiently well isolated to avoid the

possibility We must also ensure that conductors and components carrying high frequency

current are well separated from the part of the circuit We are also to make sure that all

components need to return to earth are properly connected and that possibility of common

impedance arising earth returned

Circuit is totally eliminated by making all earth as substantial possible consistent

with nature of design Other factors that have to successfully studied include availability of

adequate return points on board and itrsquos mounting from accessibility of switch connection

made for mechanical fixing ventilation effect of vibration

Cleaning The Board

The copper side of the board must be thoroughly cleaned before circuit plan is

transferred to it This is important because even slightest trace of graze (from figure of

instance) will impure the etching process and when the circuit plan has been neatly

transferred to copper in this manner the board is held under running tap and the allowed to

dry before resist is applied

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Transforming the Plan

Now once cleaning is done plan has to transfer on copper surface of PCB material

A convenient way to do this is simply put the carbon paper between a copper surface of the

board and working plan and carefully trace the lines of original plan with a ball pen

Resist

Resist is nothing more than a substrate that is unaffected by presence etching

chemicals It is usually colored so that it can be easily seen the copper surface when plan is

clearly worked on clean copper that are to be left in fact as the copper conductor must be

covered when resists the leaguer type of paints possess good resist properties but

disadvantage of relatively long time taken for drying It is essential to resist through

hardening before etching is started Nail polished are better as they quickly and are less

difficult to remove

To overcome this drying effect and to achieve the sharp edge of the trace on the

PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

short circulating due to paints are completely the avoid etching tapes and pads are available

in different sizes

Correcting Error

When a result has been thoroughly hardened any errors that have been made can

usually be corrected by gently scratching away with knife To ensure clear out lines round

edges of copper conductors on board the resist must be applied with steady band

Etching

Next comes etching of unwanted copper amp whether a small single is all that is

required as quantity of board to be produce certain precautions must be taken before

operation is commenced the most used etch amp I ferrite chloride to this is added small

quantity of HCL to accelerate But not critical as lab construction concerned A good

etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

grams of water

Agitation

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

the etchant process The depth of liquid must be sufficient to completely cover laminate the

laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

temperature and thickness of copper foil

Finishing Off

When all unwanted copper is dissolved from areas between conductor board should

be taken from an etchant amp washed in water The resist must be removed using proper

solvent After this the copper surface must be polished with any kind of cleaner It should be

seen that there is no slight incomplete etching between the conducting parts of the PCB The

PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

This process is called Tinning This process of coating involve track with soldier

Advantage of tinning the effect of environment of conductors then PCB is drilled

ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

Assembling On PCB

After the holes are drilled the component have to be assembled on PCB before

assembling the components it is necessary to clean soldering iron in order to get easy amp

accurate soldering Removing impurity particles that are gathered on iron bit due to

repetitive use cleans soldering iron

CHAPTER 9

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

SOLDERING

TECHNIQUE

Technique for good soldering

91 SOLDERING TECHNIQUE

For soldering of any joints first the terminal to be soldered are cleaned to remove

oxide film or dirt on it If required flux is applied on the points to be soldered

Now the joint to be soldered is heated with the help of soldering iron Heat

applied should be such that when solder wire is touched to joint it must melt

quickly

The joint and the soldering iron is held such that molten solder should flow

smoothly over the joint

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

When joint is completely covered with molten solder the soldering iron is re-

moved

The joint is allowed to cool without any movement

The bright shining solder indicates good soldering

In case of dry solder joint a air gap remains in between the solder material and

the joint It means that soldering is improper This is removed and again solder-

ing is done

Thus this way all the components are soldered on P C B

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 10

PCB LAYOUTS

Schematic diagram

Bottom and top layout

101 POWER SUPPLY CARD

1011 SCHIMETIC DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1012 LEGEND MARKING

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

Fig1011 Schematic diagram of power supply card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1013TOP LAYER

1014 BOTTOM LAYER

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

Fig1013 Top layer of power supply

card

Fig1014 Schematic diagram of power supply card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

102 BATTERY CHARGER CARD

1021 SCHEMATIC DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

Fig1021 Schematic diagram of battery charger card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

103 RELAY CARD

1031 SCHIMETIC DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

Fig1031 Schematic diagram of Relay card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1032 RELAY CARD LEGEND MARKING

1033 TOP LAYER

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

Fig1032 Legend marking of Relay card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1034 BOTTOM LAYER

104 MICROCONTROLER CARD

1041 SCHIMETIC DIAGRAM

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

Fig1034 Bottom layer of Relay card

Fig1041 Schematic diagram of microcontroller card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1042 ALL LAYERS

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

Fig1042 All layer of microcontroller card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 11

INTRODUCTION

OF SOFTWARE

Keil (microVision 2)

Eagle (Easily Applicable Graphical Layout Editor)

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

111 Keil (microVision 2)

1111 Introduction to C51 Cross Compiler

The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

generate fast compact code for the 8051 microcontroller family The C51 Compiler

generates object code that matches the efficiency and speed of assembly programming

Using a high-level language like C has many advantages over assembly language

programming

Knowledge of the processor instruction set is not required Rudimentary knowledge of

the memory structure of the 8051 CPU is desirable (but not necessary)

Details like register allocation and addressing of the various memory types and data

types is managed by the compiler

Programs get a formal structure (which is imposed by the C programming language) and

can be divided into separate functions This contributes to source code reusability as

well as better overall application structure

The ability to combine variable selection with specific operations improves program

readability

Keywords and operational functions that more nearly resemble the human thought

process may be used

Programming and program test time is drastically reduced

The C run-time library contains many standard routines such as formatted output

numeric conversions and floating-point arithmetic

Existing program parts can be more easily included into new programs because of

modular program construction techniques

The language C is a very portable language (based on the ANSI standard) that enjoys

wide popular support and is easily obtained for most systems Existing program

investments can be quickly adapted to other processors as needed

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1112 Software Development Cycle in Keil

When we use the Keil Software tools the

project development cycle is roughly the same as

it is for any other software development project

1 Create a project select the target chip from the

device database and configure the tool settings

2 Create source files in C or assembly

3 Build your application with the project

manager

4 Correct errors in source files

5 Test the linked application A block diagram of

the complete 8051 tool set may best illustrate the

development cycle

112 Eagle (Easily Applicable Graphical Layout Editor)

The EAGLE is an editor which is easy-to-use yet powerful tool for designing

printed circuit boards (PCBs) It is a complete platform for the development of any type of

complicated amp sophisticated multilayered PCBs This software consist of the following tool

1121 Schematic Editor

In this one can develop amp design circuits for the required PCB

1122 Layout Editor

In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

Fig 111 Software development in KEIL

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1123 Library Editor

This is very useful in case of customized component design that does not occur in the predefined library according to our need

1124 Auto Router

This is an artificial intelligence based tool or subroutine that can do auto routing of

the PCB tracks designed

1125 Cam Processor

This is used to finally print the various layers of the designed PCB viz Top Layer

Bottom Layer Component Layer Masking Layer etc

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

Start

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 12

INTRODUCTION

OF

PROGRAMMING

Flowchart of programming

Program code

121 Flowchart

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

2

flag9==1

flag9=1

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

flag11==1

flag11=1 flag11=0 flag4=0

REady_LED4=0

Sw2_op (P01) ==0

My delay (10)

3 3

flag2=1 disp2=1 k2=0

3

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

4

flag11==1

flag11=0 flag4=0 REady_LED4=0

flag11=1

My delay (10)

flag3=1 disp3=1 k3=0

k1==0||k2==0||k4==0

Sw3_op (P02) ==0

5

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

flag5==1

5

flag11==1

flag7=1

flag7==1

flag7=0 flag2=0 REady_LED2=0

6

flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

flag11=0 flag4=0 REady_LED4=0

flag11=1

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

6

My delay (10)

flag4=1 disp4=1 k4=0

k1==0||k2==0||k3==0 flag5==1

7

Sw4_op (P03) ==0

flag5=1 flag5=0 flag1=0 REady_LED1=0

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

7

flag7==1

flag9==1

flag7=1

flag7=0 flag2=0 REady_LED2=0

flag9=0 flag3=0 REady_LED3=0

flag9=1

Sw5_op A(P04) ==0

My delay (10)

8

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

9

flag2==1

flag3==1

8

flag1==1

flag4==1 flag5=1 disp5=1

flag9=1 disp5=1

flag7=1 disp5=1

flag11=1 disp5=1

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

Sw6_op (P05) ==0

My delay (10)

flag2==1 ampamp flag7==1

flag3==1 ampamp flag9==1 9

flag1==1 ampamp flag5==1 flag6=1 disp6=1

flag8=1 disp6=1

10

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

10

flag4==1 ampamp flag11==1

flag10=1 disp6=1

flag12=1 disp6=1

flag8==1

flag10==1

11

flag6==1

i++

l++

j++

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

flag12==1

M++

11

Stop

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

122 Program

includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

define buzzerP2_0 buzzer indication

setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

sbit sw5_op=P0^4 input switch5 for coin

sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

output Led for indication

sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

function prototype declaration

void my_delay(unsigned int value) DELAY FUCTION

void init_timer() timer 0 initialization function

variable declaration

bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

start of main programme

void main()

init_timer() call it timer initialization function

REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

start of while loop

while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

condition for switch1

if(flag1==1) check swich1 pressed if(disp1==1 )

REady_LED1=1 turn on Ready indication of led 1 disp1=0

if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

if(iltk) loop will repeat for desired time of charging

if(igt=1000)

buzzer=1 turn on buzzer if (ii==20)

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

REady_LED1=1 turn on ready indication of led1

else if(ii==40)

REady_LED1=0ii=0

elseREady_LED1=0

START_LED1=1

else

START_LED1=0

k1=1 buzzer=0

REady_LED1=0 flag1=0

flag5=0flag6=0

condition for switch2

if(flag2==1) check swich2 pressed if(disp2==1)

REady_LED2=1 turn on ready 2 led indication

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

disp2=0

if(flag7==1) check coin is pressed if(flag8==1) START is pressed

if(jltk)

if(jgt1000) buzzer=1 if(jj==20)

REady_LED2=1else if(jj==40)REady_LED2=0jj=0

elseREady_LED2=0

START_LED2=1

else START_LED2=0

REady_LED2=0 k2=1 buzzer=0

flag2=0flag7=0flag8=0

j=0jj=0

condition for switch 3

if(flag3==1) check swich3 pressed

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

if(disp3==1 )

REady_LED3=1 disp3=0

if(flag9==1) check coin is pressed if(flag10==1) START is pressed

if(lltk)

if(lgt1000) buzzer=1 if(ll==20)

REady_LED3=1else if(ll==40)REady_LED3=0ll=0

elseREady_LED3=0

START_LED3=1

else START_LED3=0

LED2=0 k3=1 buzzer=0

REady_LED3=0 flag3=0

flag9=0flag10=0

l=0ll=0

condition for switch 4

if(flag4==1) check swich4 pressed if(disp4==1 )

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

REady_LED4=1 disp4=0

if(flag11==1) check coin is pressed

if(flag12==1) START is pressed

if(mltk)

if(mgt1000)

buzzer=1 if(mm==20)

REady_LED4=1else if(mm==40)REady_LED4=0mm=0

elseREady_LED4=0

START_LED4=1

else START_LED4=0

buzzer=0 k4=1

REady_LED4=0 flag4=0

flag11=0flag12=0

m=0mm=0

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

while(1)

end of main programme

timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

whenever specific time the interrupt will generate control will go in following function

void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if(sw1_op==0 ) ready switch flag for system1

my_delay(10) CALL DELAY FUNCTION

flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

if(flag7==1) SET THE FLAG

flag7=1

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

flag9=1

elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

flag11=1

elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if(sw2_op==0 ) fready switch flag for system2

my_delay (10)

flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

if(flag5==1)

flag5=1

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

flag9=1

elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

flag11=1

elseflag11=0flag4=0REady_LED4=0

IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

if(flag7==1)

flag7=1

else

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

flag7=0flag2=0REady_LED2=0 if(flag5==1)

flag5=1

elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

flag11=1

elseflag11=0flag4=0REady_LED4=0

IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

if(flag7==1)

flag7=1

elseflag7=0

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

flag2=0REady_LED2=0 if(flag5==1)

flag5=1

elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

flag9=1

elseflag9=0flag3=0REady_LED3=0

IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

disp5=1 if(flag4==1 ) flag11=1 disp5=1

IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

if(flag6==1)

i++ if (igt1000) ii++

if (flag8==1)

j++ if(jgt1000) jj++

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

if (flag10==1)

l++ if (lgt1000) ll++

if (flag12==1)

m++ if (mgt1000) mm++

DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 13

TROUBLE SHOOT

Troubleshoot

131 TROUBLE SHOOT

A newly assembled circuit does not work may be due to -

Faulty components

Improper soldering

Wrong connections

Also any stop in working after some period may be due to -

Component failure

Supply failure

Damaging of PCB

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Fault finding is very essential if you want the circuit to operate properly

If a newly assembled circuit is not working properly check all the components and

circuit connections according to the diagram The circuit may not be working due to wrong

polarity of capacitor diode and wrong supply terminal connection Most of the times the

circuit does not work due to bad soldering Therefore proper procedure is followed to have

proper soldering

If faults are not observed during physical observations one should proceed for Hot

test ie Voltage measurement at different points for example at Input terminal etc

Resistance measurement is also done which is known as Dry test

During this project work some green LEDs was not glow then we checked it

continuity and replace it

Also relay was not properly worked therefore we replaced it Some ICs was get

heated after starting the project It happens because of some soldering points are shorted

during soldering PCB We solved that problem

CHAPTER 14

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

ADVANTAGES OF

THE PROJECT

Advantages

141 ADVANTAGES OF THE PROJECT

Simple and hand efficient Microcontroller based system

Fast charging capacity

Simple to operate

Ease of mobility

Facilitates connectivity for 90 of cellular phones

Less expensive

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Reduced man power

Low power consumption

It can offer emergency charging for 4sets of handsets synchronously

CHAPTER 15

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

DISADVANTAGES

OF THE PROJECT

Disadvantages

151 DISADVANTAGES OF THE PROJECT

It requires mains supply to work project

Due to limited charging channels till now there may be a possibility that

mobile phones of few brands cannot be connected for charging For this

purpose we have to use separate connectors for that specific brand differently

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

min

It does not have battery backup therefore it cannot be portable

CHAPTER 16

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

APPLICATIONS OF

THE PROJECT

Application

161 APPLICATIONS OF THE PROJECT

The coin based mobile phone charger is very useful to public for using coin to

charge for the mobile phone in any places

It is used for emergency charging purposes

It can be installed in malls railway stations bus stops and other public

places

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

The charger offers a unique revenue opportunity for a vast range of

businesses - from airports to pubs from universities to health clubs virtually

any location where there is a high footfall creating a large number of

potential users

It can be installed in offices and collages for pay charging facility

CHAPTER 17

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

FUTURE

DEVELOPMENT OF

THE PROJECT

FUTURE DEVELOPMENT OF THE PROJECT

171 FUTURE DEVELOPMENTOFTHE PROJECT

This project is very useful to people who are using mobile phone without charging

condition in public places

It will use with a stereo advertisement carrier that can display video advertisement

It will provide battery backup for make it portable

It will also provide SMS system in future

We can also increase the charging time by editing software of the project

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 18

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

COST ANALYSIS

OF THE PROJECT

COST ANALYSIS OF THE PROJECT

181 COST ANALYSIS OF THE PROJECT

1811 Component list for power supply card

Footprint Quantity Designators Rate

Resistor

22K 1 R2 1

1K 1 R1 1

Capacitor

1000uf25V 1 C5 10

2200uf25V 1 C1 10

022uf 2 C6 C2 1

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

Table 1811 Component list for power supply card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

01uf 2 C4 C3 1

IC

BRIDGE W10 2 BR2 BR1 10

L7812CV (TO-220) 1 U2 8

L7805CV (TO-220) 1 U1 8

Connector

CON PHO 2PIN 2 J3 J2 16

CON PHO 3PIN 1 J1 12

LED3mm red 2 L1 L2 15

Heat sink (TO-220) 2 16

Total 955

1812 Component list for battery charger card

Footprint Quantity Rate

Capacitor

2200uf25V 1 1000

022uf 4 100

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

01uf 4 100

IC

BRIDGE W10 1 500

L7805CV (TO-220) 4 3200

Connector

CON PHO 2PIN 1 800

Relimate 2 pin 1 400

relimate 3 pin 4 2000

Heat sink (TO-220) 4 1200

TOTAL 9300

1813 Component list for Relay card

Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

Table 1812Component list for battery charger card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

RELIM-4 1 J1 700 16 pin ic socket 1 400

Total 18900

1814Component list for controller card

Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

Table 1813Component list for relay card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

total 27000

1815 Miscellaneous material

Material Quantity Rate

electronic item

Transformer

TXR1 0-9-15 1 20000

0-9 1A

0-15 100mA

TXR2 0-9 1 16500

0-9 1A

Proximity switch 1 20000

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

Table 1814Component list for microcontroller card

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Red push bottom 4 4000

Green push button 1 1000

Red led 5mm 4 800

Green led 5mm 4 800

Led holder 8 1600

Copper clad 2 4000

3 core cable 1 meter 1500

3 pin plug 1 3000

2 pin relimate wire 19 9000

3 pin relimate wire 5 3750

4 pin relimate wire 2 2000

mechanical items

Enclosure 1 25000

Acrylic sheet 2 X 1 30000

12mm cable gland 1 1000

Screw 3mm 33 2000

Screw 35mm 6 2400

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

10 mm spacers 100 1500

10mm insert to stud 50 10000

cable tie 2500

Total 162350

CHAPTER 19

APPENDIX

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

Table 1815Component list for miscellaneous material

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

APPENDIX

191 APPENDIX

1911 78xx IC datasheet

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1912 W10 datasheet

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1913 4n33 IC datasheet

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

1914 MAX 232

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1915 ULN2003a IC datasheet

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

1916 89V51RD2 IC datasheet

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 20

CONCLUSION

CONCLUSION

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

201 CONCLUSION

The coin-operated mobile phone charger is already successfully installed in

hundreds of locations worldwide providing a unique service to the public and a source of

revenue for site providers The coin-operated mobile charger can be quickly and easily

installed in any business premises

The charger offers a unique revenue opportunity for a vast range of businesses ndash

from airports to pubs from universities to health clubs virtually any location where there is

a high footfall creating a large number of potential users

The charger can charge up to 4 different mobile phones simultaneously It will

extend low mobile phone talk time provide battery charging

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 21

IMAGES OF THE

PROJECT

Images of the project

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

211 IMAGES OF THE PROJECT

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

fig211 lsquoCoin operated mobile battery charger

Fig212 Circuit arrangement of coin operated mobile battery charger

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Fig 216 Relay driver circuit

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

Fig 213 Constant voltage battery charger circuit

Fig214 Power supply circuit

Fig215 Metal detector proximity switch

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Fig217 Microcontroller circuit

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

Fig228 coin operated mobile battery charger project presentation

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

CHAPTER 22

BIBILOGRAPHY

BIBLIOGRAPHY

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

221 BIBLIOGRAPHY

BOOKS

Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

INTERNET LINKS

wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

  • CHAPTER 1

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    11 WEEKLY WORK

    1st week Project Name selection

    1st week Literature Survey

    1st week Problem Definition

    2nd week Block diagram

    3rd to 5th week Details of individual block

    6th week Rough circuit diagram

    7th week Availability of parts in market

    8th week Purchasing parts

    8th week Testing individual Parts

    8th week Finalizing circuit diagram

    9th week PCB designing

    9th amp10th week Soldering of parts

    11th week Testing amp troubleshooting each module

    12th week Complete testing of final circuit

    13th week Writing individual module of software

    14th amp15th week Final testing of software module

    16th week Final testing of hardware amp software

    17th week Finishing final project

    17th amp18th week Report preparation

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 2

    Table 11 Table for Weekly work

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 2

    INTRODUCTION

    Introduction Functional descriptionTechnology used

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 3

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    21 Introduction

    With mobile phones becoming the major source of businesspersonal

    communication the mobile phone business is currently worth billions of dollars and

    supports millions of phones

    The need to provide a public charging service is essential Many critics argued that a

    public mobile phone charging service is not a lucrative business because most users can

    charge their phones at home in their office or in their cars

    Emergency Coin Operated Mobile Phone Charger is a new business milestone

    because many are attending business conventions and forgetting their charger at home or in

    hotel rooms

    Students and many that use the public transportation that dont know that their level

    of their battery is low are prospective customers for coin operated mobile phone charger

    service

    Recommended locations include Hotels conference centers exhibition halls

    serviced offices exchange halls motels leisure centers health clubs training centers golf

    clubs retail outlets shopping malls Internet cafes universities colleges hall of residence

    airports train terminals etc so that the mobile phone users can reactivate a low or dead

    battery by simply plugging in and charging for as low as one rupees

    22 Functional description

    The coin operated public cell phone charger is a cell phone charging station having

    four charging channels providing charging facility to various type of cell phones The

    number of channels can be increased further Each channel can be operated simultaneously

    Each and every channel is having a select switch which can be called as channel

    select switch with a red LED as an indicator for selected channel Also there is a START

    switch and a COIN inlet which is common for all the channels

    The operation of coin operated chargers is very simple The user who wishes to

    charge his cell phone has to first check out for the compatible charger jack in a channel

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 4

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Then he has to press select switch in order to make channel ready for charging the

    selected channel will be indicated by a red LED

    The channel will remain in selected mode for 30 sec Hence within 30 sec the user

    has to first insert the predefined rupee coin and then has to press START switch which will

    finally start the charging process for a predefined time and is indicated by a green LED

    If failing to do so within 1 min will reset the channel and the user has to again

    follow the same procedure

    Any other channel selection is not considered within 30 sec of previous channel if

    selected or until it has entered in to charging mode

    Completion of charging will be indicated by an OFF green LED

    23 Technology Used

    Coin recognition using proximity switch(metal detector)

    Constant voltage charger

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 5

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 3

    DEVELOPMENT

    STAGES amp

    PROCESS

    Development stages and process of the project

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 6

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    31 DEVELOPMENT STAGES amp PROCESS

    The complete development of this project can be divided into the following stages

    Problem definition stage

    Designing block diagram

    Implementing circuits and components

    Developing algorithm for software

    Writing actual code for Microcontroller

    Compiling the code

    Burning the hex file into microcontroller with programmer

    Testing and Running

    311 Problem definition stage

    This is the very first stage to develop any project It actually defines the aim

    and the concept of the project At inconvenient times when access to a standard

    charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

    designed to solve this problem The charger operates like a vending machine all a

    user has to do is plug the mobile phone into one of the four adapters and insert a

    coin the phone will then be given a micro-pulse fast charge in just 10 minutes

    312 Designing block diagram

    At this stage we have categorized the whole system into different individual

    modules These modules (block diagrams) will be helpful in understanding the

    concept and working of the integrated system It also simplifies the entire debugging

    and testing process

    313 Implementing circuits and components

    This is the actual implementation of circuit of each block At this stage we

    have actually designed each block separately and finally integrated them into the

    complete working system

    314 Developing for software

    To get the logical flow of the software the development of algorithm having

    a prominent role So that we have to analyze the complete system and organized the

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    algorithm in such a manner that one can understand the complete working of the

    software

    315 Writing actual code for Microcontroller

    After the development of the algorithm and flowchart we have actually

    translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

    that it can understand the instructions and run as per our requirement The

    instructions are in ANSII C Language

    316 Compiling the code

    The hand written code on paper was then transferred into computer For that

    we have used Keil pre-install on PC The Keil is a Computer Aided Program to

    simulate the working of Microcontroller in real time without burning the software

    into actual IC We simulated and compiled our program for error checking After

    removing several compiling errors the program was converted into machine language

    ie Philips hex format

    317 Burning the hex file into microcontroller with Programmer

    In this stage the compiled hex format file was downloaded or burned into

    flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

    system programming software provided by the manufacturer itself

    318 Testing and Running

    This time we tested our project for actual working after loading the Software

    into the microcontroller Any errors found were removed successfully This is the last

    and final stage of development of our project

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 4

    BLOCK DIAGRAM

    OF THE PROJECT

    Block Diagram Brief Explanation

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    41 Block Diagram

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

    Fig 41 Block diagram of the project

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    42 Brief Explanation

    421 POWER SUPPLY

    Power supply is used to deliver power to the circuit It delivers +5Vdc to

    microcontroller and other peripherals and +12Vdc delivers power to relay

    422 COIN INPUT AND LEVEL CONVERTOR

    Coin input is a sensor which senses a metal and produces an output voltage This

    voltage is high as compared to the input required for microcontroller

    Hence a level shifter is used to bring down the voltage level which could be

    readable to microcontroller

    423 START SWITCH

    Start switch is used to start the charging process of a

    mobile phone

    424 RS232 INTERFACING TO PC

    RS 232 is a protocol used for communication between

    computer and microcontroller It is also used for

    programming the microcontroller in its ISP (in system

    programming) mode

    425 CHANNEL READY INDICATOR

    It provides visual indication for the channel which is in

    charging mode

    426 DARLINGTON PAIR ARRAY

    Darlington pair array is used as a relay driver

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    427 CHANNEL IN CHARGE INDICATION

    It provides visual indication for the channel which is in

    charging mode

    428 RELAY ARRAY

    Relay array consists of relays for each channel to

    provide electromechanical switching in between charger and

    mobile phone

    429 CHARGER ARRAY

    Charger array is used to provide charging power to the

    mobile phones through the electromechanical switches

    4210 CELL PHONE TO CHARGE

    Channel select switch is used for selecting a channel on

    which the mobile phone is to be charged

    4211 MICROCONTROLLER

    Microcontroller is used to control the whole operation of

    the device Microcontroller reads input signal from input

    device and triggers the output device According to the

    conditions defined in the microcontroller by the programmer

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 5

    CIRCUIT

    DIAGRAM

    EXPLANATION

    Circuit diagram

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Circuit diagram explanation Working

    51 POWER SUPPLY CIRCUIT

    511 CIRCUIT DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

    Fig51 Circuit diagram of the power supply

    Bridge RectifierTRANSFORMER

    Filter Voltage regulator Load

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    512 WORKING

    Transformer

    A step-down transformer is used to achieve our requirements of the power

    supply It steps down high voltage ac mains to low voltage ac mains

    Bridge Rectifier

    A bridge rectifier makes use four diodes in a bridge arrangement to achieve

    full wave rectification This is a widely used configuration both with individual

    diodes wired and with single component bridges where the diode bridge is wired

    internally It also converts ac to dc but the dc output is varying

    One advantage of a bridge rectifier over a conventional full-wave rectifier is

    that with a given transformer the bridge rectifier produces a voltage output that is

    nearly twice that of the conventional full-wave circuit

    Filter

    The output of the rectifier is a pulsating dc wave We need a constant dc

    output To do this we need to filter out the oscillation from the pulsating dc wave

    This is obtained with a diode capacitor combination

    Voltage Regulator

    A voltage regulator is used for voltage regulation in the circuit This provides

    a protection to the circuits in the case of fluctuations It eliminates ripples by setting

    dc output to fixed voltages

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

    Fig 52 Block diagram of the power supply

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Load

    The load can be anything which wants to switch ON by using power supply

    513 CIRCUIT DIAGRAM EXPLANATION

    Regulated power supplies are commonly used in engineering projects Power

    supply is food of any circuit

    +5V SUPPLY UNIT

    +5V supply is obtained from the +5V supply unit for microcontroller and

    digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

    transformer having a capacity of 500mA

    Since the input voltage to the regulator IC should be more than its output

    voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

    of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

    smooth DC supply The rating of the chosen capacitor filter is 1000microF

    The regulated DC voltage is obtained by using a regulator IC 7805 In the

    case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

    Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

    output of regulator IC to eliminate the voltage oscillations at the output due to the large

    voltage oscillations at the input of the regulator

    +12V SUPPLY UNIT

    The plusmn12 V supply required by the relay is provided by the 12V supply circuit

    arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

    step down transformer having a capacity of 1A and the center tap of the transformer is

    grounded This low voltage is rectified with the help off bridge rectifier

    Since the input voltage to the regulator IC should be more than its output

    voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

    the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

    filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

    For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

    7912 is used

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

    the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

    connected at the output as shown in figure to eliminate the voltage oscillations at the

    output due to the large voltage oscillations at the input of the regulator

    52 CONSTANT VOLTAGE CHARGER

    521 CIRCUIT DIAGRAM

    Fig 53 Circuit diagram of the battery charger

    522 CIRCUIT DIAGRAM EXPLANATION

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Constant-voltage (often called constant-potential) chargers maintain nearly the same

    voltage input to the battery throughout the charging process regardless of the batterys state

    of charge Constant-voltage chargers provide a high initial current to the battery because of

    the greater potential difference between the battery and charger

    A constant-voltage charger may return as much as 70 of the previous discharge in

    the first 30 minutes This proves useful in many battery applications involving multiple

    discharge scenarios As the battery charges its voltage increases quickly This reduces the

    potential that has been driving the current with a corresponding rapid decrease in charge

    current as depicted in the illustration below As a result even though the battery reaches

    partial charge quickly obtaining a full charge requires prolonged charging

    Given this behavior constant-voltage chargers are frequently found in applications

    that normally allow extended charging periods to attain full charge Constant-voltage

    chargers should not be used where there is frequent cycling of the battery Repeated

    discharges without returning the cell to its full charge will eventually decrease the battery

    capacity and may damage individual cells

    Fig 54An Illustration graph of the charging function of constant battery charger

    Constant-voltage chargers are most often used in two very different modes as a fast

    charger to restore a high percentage of charge in a short time or as a float charger to

    minimize the effects of overcharge on batteries having infrequent discharges

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    53 RELAY DRIVER CIRCUIT

    531 CIRCUIT DIAGRAM

    532 CIRCUIT DIAGRAM EXPLANATION

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

    Fig 55 Relay driver circuit

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Input from the controller is connected to the relay card through connector J1 which

    carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

    pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

    These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

    relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

    series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

    and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

    relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

    NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

    3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

    RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

    is used to connect power supply to relay card

    533 WORKING

    While taking Relay1 (RL1) into consideration we will discuss the working of relay

    card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

    of the IC are in cut off region which causes an open circuit so there is no current flow

    flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

    applied to the two pin1 of IC U1 the internal transistor goes in to active region and

    completes the path ie provide ground to the relay coil so the current flows through the

    LED activating the relay

    As the current flows through the relay coil it gets energized and switch over the

    contacts ie common and normally open contact get connected and provide a path to flow

    current from J11 ie charger into the load connected at J4 hence the cell phone charging

    process starts The same above process is applies for all relays If LED is fused or

    damaged the path will be open and relay will not be energized and if relay is damaged the

    led will not be illuminated So the LED here is used as a FAULT indicator and a

    CHARGING ON indicator

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    54 MICROCONTORLLER CIRCUIT

    541 CIRCUIT DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    542 CIRCUIT DIAGRAM EXPLANATION

    CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

    the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

    port P04 through J4 and START switch is connected to port P05 through SW5

    Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

    P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

    Output for relay card is taken on port P14 to P17

    Components C1 R1 and push button S1 forms reset circuit which provides a power

    on reset for the micro controller and even provide manual reset Crystal XL1 is a

    110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

    22pf capacitor used as loading capacitor for crystal

    Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

    RN2 resistance network

    IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

    the proximity switch and microcontroller and convert its output readable to microcontroller

    IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

    communication between PC and a microcontroller through connector J3

    Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

    communication process

    Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

    power supply connection

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    543 PORT ASSIGNMENTS FOR 89V51RD2FN

    P00 = switch1 for channel 1

    P01 = switch2 for channel 2

    P02 = switch3 for channel 3

    P03 = switch4 for channel 4

    P04 = switch5 for coin input sensor (proximity switch)

    P05 = switch6 for start charging

    P10 = channel 1 red LED1 (ready system)

    P11 = channel 2 red LED2 (ready system2)

    P12 = channel 3 red LED3 (ready system3)

    P13 = channel 4 red LED4 (ready system4)

    P14 = channel 1 relay (start system1)

    P15 = channel 2 relay (start system2)

    P16 = channel 3 relay (start system3)

    P17 = channel 4 relay (start system4)

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 6

    LIST OF THE

    COMPONENTS

    List of the components

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    61 LIST OF THE COMPONETS

    RESISTORS

    CAPACITORS

    LIGHT EMITING DIODES (LEDS)- Green Red

    RELAYrsquoS-

    TRANSFORMERS

    RECTIFIER BRIDGES (W 10)

    OSCILLATOR

    SWITCHES- Push switches

    DARLINGTON PAIR IC (ULN2003a)

    SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

    SERIAL COMMUNICATION DRIVER IC (MAX 232)

    OPTOCOUPLER IC (4N33)

    MICROCONTROLLER IC (89V51 RD2)

    RELIMATE CONNECTOR- 2 pin amp 4 pin

    RS-232 PORT CONNECTOR

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 7

    INTRODUCTION

    OF COMPONENTS

    Working of components

    Features or Uses of components

    Testing of components

    71 RESISTOR

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    711 WORKING

    Resistors limit current Resistors are considered to be the most used and the most

    important component of all the electronic circuits Resistors resist the flow of electrical

    current The higher the value of resistance (measured in ohms)

    the lower the current will be

    712 TESTING

    Read the indicated color code value then select the OHM-scale within but not way

    below the indicated value A resistor is good if its resistance is close to the indicated

    Tolerance should be considered with the ohmmeter reading While no resistance reading at

    all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

    ohmmeter scale settings resistor is shorted

    713 SPECIFICATIONS

    To completely specify a resistors characteristics requires knowledge of the following

    parameters-

    bull Value

    bull Tolerance

    bull Temperature Coefficient

    bull Power Rating

    The specification of a resistor may be marked on its surface using either of two

    systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

    the second more recent system uses a combination of alpha-numeric characters

    7 2 CAPACITOR

    721 WORKING

    When DC voltage is applied to the capacitor an electric charge is stored on each

    electrode While the capacitor is charging up current flows The current will stop flowing

    when the capacitor has fully charged Capacitors find use

    in circuits for a variety of purposes They are used in

    time delay generation RC circuits In power supplies for filtering and power supply

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    decoupling as blocking capacitors for power factor correction and motor starting in LC

    tank circuits and so on

    722 TESTING

    To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

    negative probe to the capacitor positive terminal the positive probe to the negative terminal

    A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

    and moves back again to infinite resistance position A defective indication for an

    electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

    which is an indication that the capacitor is shorted

    73 LIGHT EMITING DIODE (LED)

    731 WORKING

    LEDs are special diodes that emit light when

    connected in a circuit They are frequently used as pilot lights in electronic appliances to

    indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

    the heart of an LED the semi-conductor chip

    In our project Green LED are used here for mainly two purpose

    a Charging ON indication (when ON)

    b Channel fault indication (always OFF)

    732 TESTING

    The good and working LED will then light up or glow a busted LED will not LEDs

    must have a resistor in series to limit the current to a safe value for quick testing purposes a

    1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

    directly connected to a battery or power supply It will be destroyed the LED

    733 FEATURES

    Single color

    High bright output

    Low power consumption

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    High reliability and long life

    734 Descriptions

    Dice material GaInN

    Emitting Color Super Bright White

    Device Outlineφ5mm Round Type

    Lens Type Water Clear

    74 RELAY

    741 WORKING

    A relay is an electrically operated switch Current

    flowing through the coil of the relay creates a magnetic field

    which attracts a lever and changes the switch contacts The coil

    current can be on or off so relays have two switch positions and

    most have double throw (changeover) switch contacts

    Relays are like remote control switches and are used in

    many applications because of their relative simplicity long life

    and proven high reliability

    742 USES

    The main operation of a relay comes in places where only a low-power signal can be

    used to control a circuit

    It is also used in places where only one signal can be used to control a lot of circuits

    The application of relays started during the invention of telephones They played an

    important role in switching calls in telephone exchanges They were also used in

    long distance telegraphy They were used to switch the signal coming from one

    source to another destination

    743 TESTING

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    A relay will usually have a coil pole terminal and a set of

    contacts The set of contacts that are open when the relay is not

    energized are called normally open (NO) contacts and the set of

    contacts that are closed when the relay is not energized are called

    normally closed (NC) contacts The following steps can be used to perform the testing of

    the relay using a multimeter

    Keep the multimeter in the continuity check mode

    Check for continuity between the NC contacts and pole

    Check for discontinuity between NO contacts and the pole

    Now energies the relay using the rated voltage For example use a 9V battery for

    energizing a 9V relay The relay will engage with clicking sound

    Now check for continuity between NO contacts and pole

    Also check for discontinuity between NC contacts and pole

    As a final test measure the resistance of the relay coil using a multimeter and check

    whether it is matching to the value stated by the manufacturer

    If all the above tests are positive we can conclude that the relay is healthy

    75 TRANSFORMER

    751 WORKING

    A transformer is a device that transfers electrical energy

    from one circuit to another through inductively coupled

    electrical conductors A changing current in the first circuit (the

    primary) creates a changing magnetic field

    This changing magnetic field induces a changing voltage in the second circuit (the

    secondary) This effect is called mutual induction

    If a load is connected to the secondary circuit electric charge will flow in the

    secondary winding of the transformer and transfer energy from the primary circuit to the

    load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

    of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

    number of primary turns

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    By appropriate selection of the numbers of turns a transformer thus allows an

    alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

    making it less

    752 TESTING

    1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

    scale and then adjusting the knob to verify its reading is an easy step to the

    reading of the ohm

    2 To check the resistance of the coil unplug or unsolder the leads of the

    transformer from its circuit and measure the resistance of each coil

    3 The next step is to test each coil for shorts to other coils

    76 RECTIFIER BRIDGE (W 10)

    761 WORKING

    A diode bridge rectifier is a device for converting AC or

    alternating current electricity into DC or direct current AC

    electricity goes from positive to negative constantly whereas DC

    always flows in the same direction

    AC electricity is more efficient to transmit and easier to

    convert into different voltages However most appliances need DC current to run A diode

    bridge rectifier is the most common type of power supply used to provide this current In

    our project W10 is a bridge rectifier which provides on single semiconductor chip

    77 OSCILLATOR

    771 Working

    An oscillator puts out an endless series of pulses The output

    constantly goes from 0 volts to Vcc and back to 0 volts again Almost

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    all digital circuits have some type of oscillator This stream of output pulses is often

    called a clock One of the most important features of any oscillator is its frequency stability

    or in other words its ability to provide a constant frequency output under varying load

    conditions Some of the factors that affect the frequency stability of an oscillator include

    temperature variations in the load and changes in the DC power supply Frequency stability

    of the output signal can be improved by the proper selection of the components used for the

    resonant feedback circuit including the amplifier but there is a limit to the stability that can

    be obtained from normal LC and RC tank circuits

    In our project instead of 12MHz crystal 110592MHz is used because it can be

    divided to give you exact clock rates for most of the common baud rates for the UART

    especially for the higher speeds (9600 19200) These crystals are readily available and

    commonly used

    78 SWITCH

    781 WORKING

    The most familiar form of switch is a manually operated

    electromechanical device with one or more sets of electrical contacts

    Each set of contacts can be in one of two states either closed meaning

    the contacts are touching and electricity can flow between them or

    open meaning the contacts are separated and the switch is non

    conducting The mechanism actuating the transition between these two

    states (open or closed) can be either a toggle (flip switch for continuous on or off) or

    momentary (push-for on or push-for off) type

    782 USES

    In electronics a switch is an electrical component that can break an electrical

    circuit interrupting the current or diverting it from one conductor to another

    783 TESTING

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    When the switch is ON it looks and acts like a wire When the switch is OFF there is

    no connection Switch can tested by using multimeter in continuity range

    79 DARLINGTON PAIR IC (ULN2003a)

    791 WORKING

    The Darlington transistor (often called a Darlington pair) is a

    compound structure consisting of two bipolar transistors (either

    integrated or separated devices) connected in such a way that the

    current amplified by the first transistor is amplified further by the

    second one This configuration gives a much higher current gain than

    each transistor taken separately and in the case of integrated devices

    can take less space than two individual transistors because they can

    use a shared collector

    Integrated Darlington pairs come packaged singly in

    transistor-like packages or as an array of devices (usually eight) in an integrated circuit

    The Darlington transistor array used is ULN2003 Applications include relay

    drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

    drivers and logic buffers Each input of this device has a zener diode and resistor in series

    to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

    for each Darlington pair for operation directly with TTL or 5-V CMOS devices

    792 FEATURES

    The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

    transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

    with common-cathode clamp diodes for switching inductive loads The collector-current

    rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

    higher current capability

    710 SERIES VOLTAGE REGULATER IC (78XX)

    7101 WORKING

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Voltage Regulator (regulator) usually having three legs converts varying input

    voltage and produces a constant regulated output voltage They are available in a variety of

    outputs

    The most common part numbers start with the numbers 78 or 79 and finish with two

    digits indicating the output voltage The number 78 represents positive voltage and 79

    negative one The 78XX series of voltage regulators are designed for positive input

    The LM78XX series typically has the ability to drive current up to 1A For

    application requirements up to 150mA 78LXX can be used As mentioned above the

    component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

    an output leg with the regulators voltage

    As a general rule the input voltage should be limited to 2 to 3 volts above the output

    voltage The LM78XX series can handle up to 36 volts input be advised that the power

    difference between the input and output appears as heat If the input voltage is unnecessarily

    high the regulator will overheat Unless sufficient heat dissipation is provided through heat

    sinking the regulator will shut down

    711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

    7111 WORKING

    The MAX-232 It includes a Charge Pump which generates

    +10V and -10V from a single 5v supply

    This IC also includes two receivers and two transmitters in

    the same package This is handy in many cases when we only want to

    use the Transmit and Receive data Lines We dont need to use two chips one for the

    receive line and one for the transmit There are also many variations of these devices The

    large value of capacitors are not only bulky but also expensive Therefore other devices are

    available which use smaller capacitors and even some with inbuilt capacitors However the

    MAX-232 is the most common and thus we will use this RS-232 Level Converter

    Dual Charge-Pump Voltage Converter

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

    V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

    output

    712 OPTOCOUPLER IC (4N33)

    7121 WORKING

    In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

    photoMOS) is a device that uses a short optical transmission path to transfer a signal

    between elements of a circuit typically a transmitter and a receiver while keeping them

    electrically isolated mdash since the signal goes from an electrical signal to an optical signal

    back to an electrical signal electrical contact along the path is broken

    Optocouplers typically come in a small 6-pin or 8-pin IC package but are

    essentially a combination of two distinct devices an optical transmitter typically a gallium

    arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

    light-triggered diac The two are separated by a transparent barrier which blocks any

    electrical current flow between the two but does allow the passage of light

    The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

    silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

    of isolation between driving and load circuits These Optocouplers can be used to replace

    reed and mercury relays with advantages of long life high speed switching and elimination

    of magnetic field

    713 MICROCONTROLLER IC (89V51 RD 2 )

    713 WORKING

    The P89V51RD2 is an 80C51 microcontroller with 64

    kB Flash and 1024 bytes of data RAM

    A key feature of the P89V51RD2 is its X2 mode option

    The design engineer can choose to run the application with the conventional 80C51 clock

    rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    achieve twice the throughput at the same clock frequency Another way to benefit from this

    feature is to keep the same performance by reducing the clock frequency by half thus

    dramatically reducing the EMI

    The Flash program memory supports both parallel programming and in serial In-

    System Programming (ISP) Parallel programming mode offers gang-programming at high

    speed reducing programming costs and time to market ISP allows a device to be

    reprogrammed in the end product under software control The capability to fieldupdate the

    application firmware makes a wide range of applications possible The P89V51RD2 is also

    In-Application Programmable (IAP) allowing the Flash program memory to be

    reconfigured even while the application is running

    714 RELIMATE CONNECTOR

    7141 WORKING

    These are wire to board type connectors used to facilitate

    proper and firm electrical connection between the relay card and

    microcontroller card

    The connector has following specifications

    No of Ways 2-20

    Voltage Rating 250V AC DC

    Current Rating 3A AC DC

    Contact Resistance 20mW max

    Insulation Resistance 1000MW min

    Dielectric Withstanding 1000V ACminute

    Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

    The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

    connector is it provides a fast and easy connection and disconnection it also avoids polarity

    conflicts

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    715 RS-232 PORT CONNECTOR

    7151 WORKING

    Almost all digital devices which we use require either TTL

    or CMOS logic levels Therefore the first step to connecting a

    device to the RS-232 port is to transform the RS-232 levels back

    into 0 and 5 Volts This is done by RS-232 Level Converters

    Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

    Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

    The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

    problem in many instances where only a single supply of +5V is present

    CHAPTER 8

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    IMPLIMENTATION

    OF THE PCB

    Components layout designing

    Developing or Etching the PCB

    Other operations like Drilling Cutting Tinning

    81 IMPLIMENTATION OF THE PCB

    A proper PCB ensure that various circuit components are interconnected as per the

    circuit diagram once they have been placed on the PCB in their proper positions and

    subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

    base material to which is permanently attached a flat metallic network of conducting path

    whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

    for this project is single one

    The basic material used may be resin coated paper fiber glass ceramic and the flat

    board configuration however is most widely used and it may be of the nature of the single

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

    which ensures adequate and permanent low resistance coupling

    811 BOARD DESIGN

    PCB designed is the most important and requires great care during work In this case

    great care must be taken while tracing the circuit or layout on the board Because once PCB

    is designed it is virtually impossible to alter it While designing a circuit designer should

    take care to avoid crossing of conducting path (tracks) as possible Crossover are

    unavoidable then only of the jumper can be used A circuit board carrying on both sides can

    also help to solve this problem when circuit is complicated

    812 THE MASTER DIAGRAM

    The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

    which is commonly made twice as the finished circuit since this makes the working on that

    much easier especially when circuit is complicated photography eventually reduces the

    size of diagram to that of the circuit before proceeding we must know some rules regarding

    the designing -

    a The space between the conductors must be strictly controlled to avoid the possibility

    of electrical discharges or unwanted capacitance The amount by which the mater

    diagram is to reduce in size is thus a critical deign feature

    b The conductor must be wider in those part of the circuits that are going to handle

    large current must be handle without undue temperature of conductors

    c The minimum width of copper should not generally be less than about 15mmThis

    is related to mechanical strength rather than electrical properties and it also ensure

    that strips remains securely bounded to the base material

    d The points where the component holes for component lead wire occurs must be sited

    to suit the dimensions of the component and dimensions between lead-out wire so

    that the components can be situated correctly on finished board The conductor is

    also main large at the point of holes

    813 PCB MAKING

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    When the mater diagram probable twice the size of real PCB has been evolved the

    test major step consists of etching or dissolving the unwanted metal from copper claded

    board to create a circuit as depicted by master diagram It must be stressed that very

    accurate checking master is essential at this stage Then the master point is mounted on a

    special frame on easy facing of a larger camera and with the aid of the very powerful

    illumination a master diagram is clearly photographed on a glass sensitive plate This is

    developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

    brought into operation This comprises the camera body mounted so that sideways after

    each exposure In this way number of copies of the original master diagram is set out

    exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

    In case of simple and need of number of less PCB economic and advisable to use the

    following lab method of PCB making

    Planning The Circuit

    It is not a particular difficult There are several important factors that need not be

    taken into account if the finished device is to work properly we must consider gain factor

    and ensure that the input and output parts are sufficiently well isolated to avoid the

    possibility We must also ensure that conductors and components carrying high frequency

    current are well separated from the part of the circuit We are also to make sure that all

    components need to return to earth are properly connected and that possibility of common

    impedance arising earth returned

    Circuit is totally eliminated by making all earth as substantial possible consistent

    with nature of design Other factors that have to successfully studied include availability of

    adequate return points on board and itrsquos mounting from accessibility of switch connection

    made for mechanical fixing ventilation effect of vibration

    Cleaning The Board

    The copper side of the board must be thoroughly cleaned before circuit plan is

    transferred to it This is important because even slightest trace of graze (from figure of

    instance) will impure the etching process and when the circuit plan has been neatly

    transferred to copper in this manner the board is held under running tap and the allowed to

    dry before resist is applied

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Transforming the Plan

    Now once cleaning is done plan has to transfer on copper surface of PCB material

    A convenient way to do this is simply put the carbon paper between a copper surface of the

    board and working plan and carefully trace the lines of original plan with a ball pen

    Resist

    Resist is nothing more than a substrate that is unaffected by presence etching

    chemicals It is usually colored so that it can be easily seen the copper surface when plan is

    clearly worked on clean copper that are to be left in fact as the copper conductor must be

    covered when resists the leaguer type of paints possess good resist properties but

    disadvantage of relatively long time taken for drying It is essential to resist through

    hardening before etching is started Nail polished are better as they quickly and are less

    difficult to remove

    To overcome this drying effect and to achieve the sharp edge of the trace on the

    PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

    short circulating due to paints are completely the avoid etching tapes and pads are available

    in different sizes

    Correcting Error

    When a result has been thoroughly hardened any errors that have been made can

    usually be corrected by gently scratching away with knife To ensure clear out lines round

    edges of copper conductors on board the resist must be applied with steady band

    Etching

    Next comes etching of unwanted copper amp whether a small single is all that is

    required as quantity of board to be produce certain precautions must be taken before

    operation is commenced the most used etch amp I ferrite chloride to this is added small

    quantity of HCL to accelerate But not critical as lab construction concerned A good

    etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

    grams of water

    Agitation

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

    the etchant process The depth of liquid must be sufficient to completely cover laminate the

    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

    temperature and thickness of copper foil

    Finishing Off

    When all unwanted copper is dissolved from areas between conductor board should

    be taken from an etchant amp washed in water The resist must be removed using proper

    solvent After this the copper surface must be polished with any kind of cleaner It should be

    seen that there is no slight incomplete etching between the conducting parts of the PCB The

    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

    This process is called Tinning This process of coating involve track with soldier

    Advantage of tinning the effect of environment of conductors then PCB is drilled

    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

    Assembling On PCB

    After the holes are drilled the component have to be assembled on PCB before

    assembling the components it is necessary to clean soldering iron in order to get easy amp

    accurate soldering Removing impurity particles that are gathered on iron bit due to

    repetitive use cleans soldering iron

    CHAPTER 9

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    SOLDERING

    TECHNIQUE

    Technique for good soldering

    91 SOLDERING TECHNIQUE

    For soldering of any joints first the terminal to be soldered are cleaned to remove

    oxide film or dirt on it If required flux is applied on the points to be soldered

    Now the joint to be soldered is heated with the help of soldering iron Heat

    applied should be such that when solder wire is touched to joint it must melt

    quickly

    The joint and the soldering iron is held such that molten solder should flow

    smoothly over the joint

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    When joint is completely covered with molten solder the soldering iron is re-

    moved

    The joint is allowed to cool without any movement

    The bright shining solder indicates good soldering

    In case of dry solder joint a air gap remains in between the solder material and

    the joint It means that soldering is improper This is removed and again solder-

    ing is done

    Thus this way all the components are soldered on P C B

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 10

    PCB LAYOUTS

    Schematic diagram

    Bottom and top layout

    101 POWER SUPPLY CARD

    1011 SCHIMETIC DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1012 LEGEND MARKING

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

    Fig1011 Schematic diagram of power supply card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1013TOP LAYER

    1014 BOTTOM LAYER

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

    Fig1013 Top layer of power supply

    card

    Fig1014 Schematic diagram of power supply card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    102 BATTERY CHARGER CARD

    1021 SCHEMATIC DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

    Fig1021 Schematic diagram of battery charger card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    103 RELAY CARD

    1031 SCHIMETIC DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

    Fig1031 Schematic diagram of Relay card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1032 RELAY CARD LEGEND MARKING

    1033 TOP LAYER

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

    Fig1032 Legend marking of Relay card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1034 BOTTOM LAYER

    104 MICROCONTROLER CARD

    1041 SCHIMETIC DIAGRAM

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

    Fig1034 Bottom layer of Relay card

    Fig1041 Schematic diagram of microcontroller card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1042 ALL LAYERS

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

    Fig1042 All layer of microcontroller card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 11

    INTRODUCTION

    OF SOFTWARE

    Keil (microVision 2)

    Eagle (Easily Applicable Graphical Layout Editor)

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    111 Keil (microVision 2)

    1111 Introduction to C51 Cross Compiler

    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

    generate fast compact code for the 8051 microcontroller family The C51 Compiler

    generates object code that matches the efficiency and speed of assembly programming

    Using a high-level language like C has many advantages over assembly language

    programming

    Knowledge of the processor instruction set is not required Rudimentary knowledge of

    the memory structure of the 8051 CPU is desirable (but not necessary)

    Details like register allocation and addressing of the various memory types and data

    types is managed by the compiler

    Programs get a formal structure (which is imposed by the C programming language) and

    can be divided into separate functions This contributes to source code reusability as

    well as better overall application structure

    The ability to combine variable selection with specific operations improves program

    readability

    Keywords and operational functions that more nearly resemble the human thought

    process may be used

    Programming and program test time is drastically reduced

    The C run-time library contains many standard routines such as formatted output

    numeric conversions and floating-point arithmetic

    Existing program parts can be more easily included into new programs because of

    modular program construction techniques

    The language C is a very portable language (based on the ANSI standard) that enjoys

    wide popular support and is easily obtained for most systems Existing program

    investments can be quickly adapted to other processors as needed

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1112 Software Development Cycle in Keil

    When we use the Keil Software tools the

    project development cycle is roughly the same as

    it is for any other software development project

    1 Create a project select the target chip from the

    device database and configure the tool settings

    2 Create source files in C or assembly

    3 Build your application with the project

    manager

    4 Correct errors in source files

    5 Test the linked application A block diagram of

    the complete 8051 tool set may best illustrate the

    development cycle

    112 Eagle (Easily Applicable Graphical Layout Editor)

    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

    printed circuit boards (PCBs) It is a complete platform for the development of any type of

    complicated amp sophisticated multilayered PCBs This software consist of the following tool

    1121 Schematic Editor

    In this one can develop amp design circuits for the required PCB

    1122 Layout Editor

    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

    Fig 111 Software development in KEIL

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1123 Library Editor

    This is very useful in case of customized component design that does not occur in the predefined library according to our need

    1124 Auto Router

    This is an artificial intelligence based tool or subroutine that can do auto routing of

    the PCB tracks designed

    1125 Cam Processor

    This is used to finally print the various layers of the designed PCB viz Top Layer

    Bottom Layer Component Layer Masking Layer etc

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

    Start

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 12

    INTRODUCTION

    OF

    PROGRAMMING

    Flowchart of programming

    Program code

    121 Flowchart

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

    2

    flag9==1

    flag9=1

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

    flag11==1

    flag11=1 flag11=0 flag4=0

    REady_LED4=0

    Sw2_op (P01) ==0

    My delay (10)

    3 3

    flag2=1 disp2=1 k2=0

    3

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

    4

    flag11==1

    flag11=0 flag4=0 REady_LED4=0

    flag11=1

    My delay (10)

    flag3=1 disp3=1 k3=0

    k1==0||k2==0||k4==0

    Sw3_op (P02) ==0

    5

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

    flag5==1

    5

    flag11==1

    flag7=1

    flag7==1

    flag7=0 flag2=0 REady_LED2=0

    6

    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

    flag11=0 flag4=0 REady_LED4=0

    flag11=1

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

    6

    My delay (10)

    flag4=1 disp4=1 k4=0

    k1==0||k2==0||k3==0 flag5==1

    7

    Sw4_op (P03) ==0

    flag5=1 flag5=0 flag1=0 REady_LED1=0

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

    7

    flag7==1

    flag9==1

    flag7=1

    flag7=0 flag2=0 REady_LED2=0

    flag9=0 flag3=0 REady_LED3=0

    flag9=1

    Sw5_op A(P04) ==0

    My delay (10)

    8

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

    9

    flag2==1

    flag3==1

    8

    flag1==1

    flag4==1 flag5=1 disp5=1

    flag9=1 disp5=1

    flag7=1 disp5=1

    flag11=1 disp5=1

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

    Sw6_op (P05) ==0

    My delay (10)

    flag2==1 ampamp flag7==1

    flag3==1 ampamp flag9==1 9

    flag1==1 ampamp flag5==1 flag6=1 disp6=1

    flag8=1 disp6=1

    10

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

    10

    flag4==1 ampamp flag11==1

    flag10=1 disp6=1

    flag12=1 disp6=1

    flag8==1

    flag10==1

    11

    flag6==1

    i++

    l++

    j++

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

    flag12==1

    M++

    11

    Stop

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    122 Program

    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

    define buzzerP2_0 buzzer indication

    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

    sbit sw5_op=P0^4 input switch5 for coin

    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

    output Led for indication

    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

    function prototype declaration

    void my_delay(unsigned int value) DELAY FUCTION

    void init_timer() timer 0 initialization function

    variable declaration

    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    start of main programme

    void main()

    init_timer() call it timer initialization function

    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

    start of while loop

    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

    condition for switch1

    if(flag1==1) check swich1 pressed if(disp1==1 )

    REady_LED1=1 turn on Ready indication of led 1 disp1=0

    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

    if(iltk) loop will repeat for desired time of charging

    if(igt=1000)

    buzzer=1 turn on buzzer if (ii==20)

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    REady_LED1=1 turn on ready indication of led1

    else if(ii==40)

    REady_LED1=0ii=0

    elseREady_LED1=0

    START_LED1=1

    else

    START_LED1=0

    k1=1 buzzer=0

    REady_LED1=0 flag1=0

    flag5=0flag6=0

    condition for switch2

    if(flag2==1) check swich2 pressed if(disp2==1)

    REady_LED2=1 turn on ready 2 led indication

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    disp2=0

    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

    if(jltk)

    if(jgt1000) buzzer=1 if(jj==20)

    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

    elseREady_LED2=0

    START_LED2=1

    else START_LED2=0

    REady_LED2=0 k2=1 buzzer=0

    flag2=0flag7=0flag8=0

    j=0jj=0

    condition for switch 3

    if(flag3==1) check swich3 pressed

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    if(disp3==1 )

    REady_LED3=1 disp3=0

    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

    if(lltk)

    if(lgt1000) buzzer=1 if(ll==20)

    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

    elseREady_LED3=0

    START_LED3=1

    else START_LED3=0

    LED2=0 k3=1 buzzer=0

    REady_LED3=0 flag3=0

    flag9=0flag10=0

    l=0ll=0

    condition for switch 4

    if(flag4==1) check swich4 pressed if(disp4==1 )

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    REady_LED4=1 disp4=0

    if(flag11==1) check coin is pressed

    if(flag12==1) START is pressed

    if(mltk)

    if(mgt1000)

    buzzer=1 if(mm==20)

    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

    elseREady_LED4=0

    START_LED4=1

    else START_LED4=0

    buzzer=0 k4=1

    REady_LED4=0 flag4=0

    flag11=0flag12=0

    m=0mm=0

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    while(1)

    end of main programme

    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

    whenever specific time the interrupt will generate control will go in following function

    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if(sw1_op==0 ) ready switch flag for system1

    my_delay(10) CALL DELAY FUNCTION

    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

    if(flag7==1) SET THE FLAG

    flag7=1

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

    flag9=1

    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

    flag11=1

    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if(sw2_op==0 ) fready switch flag for system2

    my_delay (10)

    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

    if(flag5==1)

    flag5=1

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

    flag9=1

    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

    flag11=1

    elseflag11=0flag4=0REady_LED4=0

    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

    if(flag7==1)

    flag7=1

    else

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    flag7=0flag2=0REady_LED2=0 if(flag5==1)

    flag5=1

    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

    flag11=1

    elseflag11=0flag4=0REady_LED4=0

    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

    if(flag7==1)

    flag7=1

    elseflag7=0

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    flag2=0REady_LED2=0 if(flag5==1)

    flag5=1

    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

    flag9=1

    elseflag9=0flag3=0REady_LED3=0

    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    disp5=1 if(flag4==1 ) flag11=1 disp5=1

    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

    if(flag6==1)

    i++ if (igt1000) ii++

    if (flag8==1)

    j++ if(jgt1000) jj++

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    if (flag10==1)

    l++ if (lgt1000) ll++

    if (flag12==1)

    m++ if (mgt1000) mm++

    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 13

    TROUBLE SHOOT

    Troubleshoot

    131 TROUBLE SHOOT

    A newly assembled circuit does not work may be due to -

    Faulty components

    Improper soldering

    Wrong connections

    Also any stop in working after some period may be due to -

    Component failure

    Supply failure

    Damaging of PCB

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Fault finding is very essential if you want the circuit to operate properly

    If a newly assembled circuit is not working properly check all the components and

    circuit connections according to the diagram The circuit may not be working due to wrong

    polarity of capacitor diode and wrong supply terminal connection Most of the times the

    circuit does not work due to bad soldering Therefore proper procedure is followed to have

    proper soldering

    If faults are not observed during physical observations one should proceed for Hot

    test ie Voltage measurement at different points for example at Input terminal etc

    Resistance measurement is also done which is known as Dry test

    During this project work some green LEDs was not glow then we checked it

    continuity and replace it

    Also relay was not properly worked therefore we replaced it Some ICs was get

    heated after starting the project It happens because of some soldering points are shorted

    during soldering PCB We solved that problem

    CHAPTER 14

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    ADVANTAGES OF

    THE PROJECT

    Advantages

    141 ADVANTAGES OF THE PROJECT

    Simple and hand efficient Microcontroller based system

    Fast charging capacity

    Simple to operate

    Ease of mobility

    Facilitates connectivity for 90 of cellular phones

    Less expensive

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Reduced man power

    Low power consumption

    It can offer emergency charging for 4sets of handsets synchronously

    CHAPTER 15

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    DISADVANTAGES

    OF THE PROJECT

    Disadvantages

    151 DISADVANTAGES OF THE PROJECT

    It requires mains supply to work project

    Due to limited charging channels till now there may be a possibility that

    mobile phones of few brands cannot be connected for charging For this

    purpose we have to use separate connectors for that specific brand differently

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

    min

    It does not have battery backup therefore it cannot be portable

    CHAPTER 16

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    APPLICATIONS OF

    THE PROJECT

    Application

    161 APPLICATIONS OF THE PROJECT

    The coin based mobile phone charger is very useful to public for using coin to

    charge for the mobile phone in any places

    It is used for emergency charging purposes

    It can be installed in malls railway stations bus stops and other public

    places

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    The charger offers a unique revenue opportunity for a vast range of

    businesses - from airports to pubs from universities to health clubs virtually

    any location where there is a high footfall creating a large number of

    potential users

    It can be installed in offices and collages for pay charging facility

    CHAPTER 17

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    FUTURE

    DEVELOPMENT OF

    THE PROJECT

    FUTURE DEVELOPMENT OF THE PROJECT

    171 FUTURE DEVELOPMENTOFTHE PROJECT

    This project is very useful to people who are using mobile phone without charging

    condition in public places

    It will use with a stereo advertisement carrier that can display video advertisement

    It will provide battery backup for make it portable

    It will also provide SMS system in future

    We can also increase the charging time by editing software of the project

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 18

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    COST ANALYSIS

    OF THE PROJECT

    COST ANALYSIS OF THE PROJECT

    181 COST ANALYSIS OF THE PROJECT

    1811 Component list for power supply card

    Footprint Quantity Designators Rate

    Resistor

    22K 1 R2 1

    1K 1 R1 1

    Capacitor

    1000uf25V 1 C5 10

    2200uf25V 1 C1 10

    022uf 2 C6 C2 1

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

    Table 1811 Component list for power supply card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    01uf 2 C4 C3 1

    IC

    BRIDGE W10 2 BR2 BR1 10

    L7812CV (TO-220) 1 U2 8

    L7805CV (TO-220) 1 U1 8

    Connector

    CON PHO 2PIN 2 J3 J2 16

    CON PHO 3PIN 1 J1 12

    LED3mm red 2 L1 L2 15

    Heat sink (TO-220) 2 16

    Total 955

    1812 Component list for battery charger card

    Footprint Quantity Rate

    Capacitor

    2200uf25V 1 1000

    022uf 4 100

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    01uf 4 100

    IC

    BRIDGE W10 1 500

    L7805CV (TO-220) 4 3200

    Connector

    CON PHO 2PIN 1 800

    Relimate 2 pin 1 400

    relimate 3 pin 4 2000

    Heat sink (TO-220) 4 1200

    TOTAL 9300

    1813 Component list for Relay card

    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

    Table 1812Component list for battery charger card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    RELIM-4 1 J1 700 16 pin ic socket 1 400

    Total 18900

    1814Component list for controller card

    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

    Table 1813Component list for relay card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

    total 27000

    1815 Miscellaneous material

    Material Quantity Rate

    electronic item

    Transformer

    TXR1 0-9-15 1 20000

    0-9 1A

    0-15 100mA

    TXR2 0-9 1 16500

    0-9 1A

    Proximity switch 1 20000

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

    Table 1814Component list for microcontroller card

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Red push bottom 4 4000

    Green push button 1 1000

    Red led 5mm 4 800

    Green led 5mm 4 800

    Led holder 8 1600

    Copper clad 2 4000

    3 core cable 1 meter 1500

    3 pin plug 1 3000

    2 pin relimate wire 19 9000

    3 pin relimate wire 5 3750

    4 pin relimate wire 2 2000

    mechanical items

    Enclosure 1 25000

    Acrylic sheet 2 X 1 30000

    12mm cable gland 1 1000

    Screw 3mm 33 2000

    Screw 35mm 6 2400

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    10 mm spacers 100 1500

    10mm insert to stud 50 10000

    cable tie 2500

    Total 162350

    CHAPTER 19

    APPENDIX

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

    Table 1815Component list for miscellaneous material

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    APPENDIX

    191 APPENDIX

    1911 78xx IC datasheet

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    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1912 W10 datasheet

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1913 4n33 IC datasheet

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

    1914 MAX 232

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1915 ULN2003a IC datasheet

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    1916 89V51RD2 IC datasheet

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 20

    CONCLUSION

    CONCLUSION

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    201 CONCLUSION

    The coin-operated mobile phone charger is already successfully installed in

    hundreds of locations worldwide providing a unique service to the public and a source of

    revenue for site providers The coin-operated mobile charger can be quickly and easily

    installed in any business premises

    The charger offers a unique revenue opportunity for a vast range of businesses ndash

    from airports to pubs from universities to health clubs virtually any location where there is

    a high footfall creating a large number of potential users

    The charger can charge up to 4 different mobile phones simultaneously It will

    extend low mobile phone talk time provide battery charging

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 21

    IMAGES OF THE

    PROJECT

    Images of the project

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    211 IMAGES OF THE PROJECT

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

    fig211 lsquoCoin operated mobile battery charger

    Fig212 Circuit arrangement of coin operated mobile battery charger

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Fig 216 Relay driver circuit

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

    Fig 213 Constant voltage battery charger circuit

    Fig214 Power supply circuit

    Fig215 Metal detector proximity switch

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Fig217 Microcontroller circuit

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    Fig228 coin operated mobile battery charger project presentation

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    CHAPTER 22

    BIBILOGRAPHY

    BIBLIOGRAPHY

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

    221 BIBLIOGRAPHY

    BOOKS

    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

    INTERNET LINKS

    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

    • CHAPTER 1

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 2

      INTRODUCTION

      Introduction Functional descriptionTechnology used

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 3

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      21 Introduction

      With mobile phones becoming the major source of businesspersonal

      communication the mobile phone business is currently worth billions of dollars and

      supports millions of phones

      The need to provide a public charging service is essential Many critics argued that a

      public mobile phone charging service is not a lucrative business because most users can

      charge their phones at home in their office or in their cars

      Emergency Coin Operated Mobile Phone Charger is a new business milestone

      because many are attending business conventions and forgetting their charger at home or in

      hotel rooms

      Students and many that use the public transportation that dont know that their level

      of their battery is low are prospective customers for coin operated mobile phone charger

      service

      Recommended locations include Hotels conference centers exhibition halls

      serviced offices exchange halls motels leisure centers health clubs training centers golf

      clubs retail outlets shopping malls Internet cafes universities colleges hall of residence

      airports train terminals etc so that the mobile phone users can reactivate a low or dead

      battery by simply plugging in and charging for as low as one rupees

      22 Functional description

      The coin operated public cell phone charger is a cell phone charging station having

      four charging channels providing charging facility to various type of cell phones The

      number of channels can be increased further Each channel can be operated simultaneously

      Each and every channel is having a select switch which can be called as channel

      select switch with a red LED as an indicator for selected channel Also there is a START

      switch and a COIN inlet which is common for all the channels

      The operation of coin operated chargers is very simple The user who wishes to

      charge his cell phone has to first check out for the compatible charger jack in a channel

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 4

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Then he has to press select switch in order to make channel ready for charging the

      selected channel will be indicated by a red LED

      The channel will remain in selected mode for 30 sec Hence within 30 sec the user

      has to first insert the predefined rupee coin and then has to press START switch which will

      finally start the charging process for a predefined time and is indicated by a green LED

      If failing to do so within 1 min will reset the channel and the user has to again

      follow the same procedure

      Any other channel selection is not considered within 30 sec of previous channel if

      selected or until it has entered in to charging mode

      Completion of charging will be indicated by an OFF green LED

      23 Technology Used

      Coin recognition using proximity switch(metal detector)

      Constant voltage charger

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 5

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 3

      DEVELOPMENT

      STAGES amp

      PROCESS

      Development stages and process of the project

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 6

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      31 DEVELOPMENT STAGES amp PROCESS

      The complete development of this project can be divided into the following stages

      Problem definition stage

      Designing block diagram

      Implementing circuits and components

      Developing algorithm for software

      Writing actual code for Microcontroller

      Compiling the code

      Burning the hex file into microcontroller with programmer

      Testing and Running

      311 Problem definition stage

      This is the very first stage to develop any project It actually defines the aim

      and the concept of the project At inconvenient times when access to a standard

      charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

      designed to solve this problem The charger operates like a vending machine all a

      user has to do is plug the mobile phone into one of the four adapters and insert a

      coin the phone will then be given a micro-pulse fast charge in just 10 minutes

      312 Designing block diagram

      At this stage we have categorized the whole system into different individual

      modules These modules (block diagrams) will be helpful in understanding the

      concept and working of the integrated system It also simplifies the entire debugging

      and testing process

      313 Implementing circuits and components

      This is the actual implementation of circuit of each block At this stage we

      have actually designed each block separately and finally integrated them into the

      complete working system

      314 Developing for software

      To get the logical flow of the software the development of algorithm having

      a prominent role So that we have to analyze the complete system and organized the

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      algorithm in such a manner that one can understand the complete working of the

      software

      315 Writing actual code for Microcontroller

      After the development of the algorithm and flowchart we have actually

      translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

      that it can understand the instructions and run as per our requirement The

      instructions are in ANSII C Language

      316 Compiling the code

      The hand written code on paper was then transferred into computer For that

      we have used Keil pre-install on PC The Keil is a Computer Aided Program to

      simulate the working of Microcontroller in real time without burning the software

      into actual IC We simulated and compiled our program for error checking After

      removing several compiling errors the program was converted into machine language

      ie Philips hex format

      317 Burning the hex file into microcontroller with Programmer

      In this stage the compiled hex format file was downloaded or burned into

      flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

      system programming software provided by the manufacturer itself

      318 Testing and Running

      This time we tested our project for actual working after loading the Software

      into the microcontroller Any errors found were removed successfully This is the last

      and final stage of development of our project

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 4

      BLOCK DIAGRAM

      OF THE PROJECT

      Block Diagram Brief Explanation

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      41 Block Diagram

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

      Fig 41 Block diagram of the project

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      42 Brief Explanation

      421 POWER SUPPLY

      Power supply is used to deliver power to the circuit It delivers +5Vdc to

      microcontroller and other peripherals and +12Vdc delivers power to relay

      422 COIN INPUT AND LEVEL CONVERTOR

      Coin input is a sensor which senses a metal and produces an output voltage This

      voltage is high as compared to the input required for microcontroller

      Hence a level shifter is used to bring down the voltage level which could be

      readable to microcontroller

      423 START SWITCH

      Start switch is used to start the charging process of a

      mobile phone

      424 RS232 INTERFACING TO PC

      RS 232 is a protocol used for communication between

      computer and microcontroller It is also used for

      programming the microcontroller in its ISP (in system

      programming) mode

      425 CHANNEL READY INDICATOR

      It provides visual indication for the channel which is in

      charging mode

      426 DARLINGTON PAIR ARRAY

      Darlington pair array is used as a relay driver

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      427 CHANNEL IN CHARGE INDICATION

      It provides visual indication for the channel which is in

      charging mode

      428 RELAY ARRAY

      Relay array consists of relays for each channel to

      provide electromechanical switching in between charger and

      mobile phone

      429 CHARGER ARRAY

      Charger array is used to provide charging power to the

      mobile phones through the electromechanical switches

      4210 CELL PHONE TO CHARGE

      Channel select switch is used for selecting a channel on

      which the mobile phone is to be charged

      4211 MICROCONTROLLER

      Microcontroller is used to control the whole operation of

      the device Microcontroller reads input signal from input

      device and triggers the output device According to the

      conditions defined in the microcontroller by the programmer

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 5

      CIRCUIT

      DIAGRAM

      EXPLANATION

      Circuit diagram

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Circuit diagram explanation Working

      51 POWER SUPPLY CIRCUIT

      511 CIRCUIT DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

      Fig51 Circuit diagram of the power supply

      Bridge RectifierTRANSFORMER

      Filter Voltage regulator Load

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      512 WORKING

      Transformer

      A step-down transformer is used to achieve our requirements of the power

      supply It steps down high voltage ac mains to low voltage ac mains

      Bridge Rectifier

      A bridge rectifier makes use four diodes in a bridge arrangement to achieve

      full wave rectification This is a widely used configuration both with individual

      diodes wired and with single component bridges where the diode bridge is wired

      internally It also converts ac to dc but the dc output is varying

      One advantage of a bridge rectifier over a conventional full-wave rectifier is

      that with a given transformer the bridge rectifier produces a voltage output that is

      nearly twice that of the conventional full-wave circuit

      Filter

      The output of the rectifier is a pulsating dc wave We need a constant dc

      output To do this we need to filter out the oscillation from the pulsating dc wave

      This is obtained with a diode capacitor combination

      Voltage Regulator

      A voltage regulator is used for voltage regulation in the circuit This provides

      a protection to the circuits in the case of fluctuations It eliminates ripples by setting

      dc output to fixed voltages

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

      Fig 52 Block diagram of the power supply

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Load

      The load can be anything which wants to switch ON by using power supply

      513 CIRCUIT DIAGRAM EXPLANATION

      Regulated power supplies are commonly used in engineering projects Power

      supply is food of any circuit

      +5V SUPPLY UNIT

      +5V supply is obtained from the +5V supply unit for microcontroller and

      digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

      transformer having a capacity of 500mA

      Since the input voltage to the regulator IC should be more than its output

      voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

      of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

      smooth DC supply The rating of the chosen capacitor filter is 1000microF

      The regulated DC voltage is obtained by using a regulator IC 7805 In the

      case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

      Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

      output of regulator IC to eliminate the voltage oscillations at the output due to the large

      voltage oscillations at the input of the regulator

      +12V SUPPLY UNIT

      The plusmn12 V supply required by the relay is provided by the 12V supply circuit

      arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

      step down transformer having a capacity of 1A and the center tap of the transformer is

      grounded This low voltage is rectified with the help off bridge rectifier

      Since the input voltage to the regulator IC should be more than its output

      voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

      the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

      filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

      For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

      7912 is used

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

      the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

      connected at the output as shown in figure to eliminate the voltage oscillations at the

      output due to the large voltage oscillations at the input of the regulator

      52 CONSTANT VOLTAGE CHARGER

      521 CIRCUIT DIAGRAM

      Fig 53 Circuit diagram of the battery charger

      522 CIRCUIT DIAGRAM EXPLANATION

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Constant-voltage (often called constant-potential) chargers maintain nearly the same

      voltage input to the battery throughout the charging process regardless of the batterys state

      of charge Constant-voltage chargers provide a high initial current to the battery because of

      the greater potential difference between the battery and charger

      A constant-voltage charger may return as much as 70 of the previous discharge in

      the first 30 minutes This proves useful in many battery applications involving multiple

      discharge scenarios As the battery charges its voltage increases quickly This reduces the

      potential that has been driving the current with a corresponding rapid decrease in charge

      current as depicted in the illustration below As a result even though the battery reaches

      partial charge quickly obtaining a full charge requires prolonged charging

      Given this behavior constant-voltage chargers are frequently found in applications

      that normally allow extended charging periods to attain full charge Constant-voltage

      chargers should not be used where there is frequent cycling of the battery Repeated

      discharges without returning the cell to its full charge will eventually decrease the battery

      capacity and may damage individual cells

      Fig 54An Illustration graph of the charging function of constant battery charger

      Constant-voltage chargers are most often used in two very different modes as a fast

      charger to restore a high percentage of charge in a short time or as a float charger to

      minimize the effects of overcharge on batteries having infrequent discharges

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      53 RELAY DRIVER CIRCUIT

      531 CIRCUIT DIAGRAM

      532 CIRCUIT DIAGRAM EXPLANATION

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

      Fig 55 Relay driver circuit

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Input from the controller is connected to the relay card through connector J1 which

      carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

      pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

      These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

      relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

      series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

      and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

      relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

      NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

      3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

      RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

      is used to connect power supply to relay card

      533 WORKING

      While taking Relay1 (RL1) into consideration we will discuss the working of relay

      card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

      of the IC are in cut off region which causes an open circuit so there is no current flow

      flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

      applied to the two pin1 of IC U1 the internal transistor goes in to active region and

      completes the path ie provide ground to the relay coil so the current flows through the

      LED activating the relay

      As the current flows through the relay coil it gets energized and switch over the

      contacts ie common and normally open contact get connected and provide a path to flow

      current from J11 ie charger into the load connected at J4 hence the cell phone charging

      process starts The same above process is applies for all relays If LED is fused or

      damaged the path will be open and relay will not be energized and if relay is damaged the

      led will not be illuminated So the LED here is used as a FAULT indicator and a

      CHARGING ON indicator

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      54 MICROCONTORLLER CIRCUIT

      541 CIRCUIT DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      542 CIRCUIT DIAGRAM EXPLANATION

      CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

      the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

      port P04 through J4 and START switch is connected to port P05 through SW5

      Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

      P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

      Output for relay card is taken on port P14 to P17

      Components C1 R1 and push button S1 forms reset circuit which provides a power

      on reset for the micro controller and even provide manual reset Crystal XL1 is a

      110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

      22pf capacitor used as loading capacitor for crystal

      Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

      RN2 resistance network

      IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

      the proximity switch and microcontroller and convert its output readable to microcontroller

      IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

      communication between PC and a microcontroller through connector J3

      Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

      communication process

      Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

      power supply connection

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      543 PORT ASSIGNMENTS FOR 89V51RD2FN

      P00 = switch1 for channel 1

      P01 = switch2 for channel 2

      P02 = switch3 for channel 3

      P03 = switch4 for channel 4

      P04 = switch5 for coin input sensor (proximity switch)

      P05 = switch6 for start charging

      P10 = channel 1 red LED1 (ready system)

      P11 = channel 2 red LED2 (ready system2)

      P12 = channel 3 red LED3 (ready system3)

      P13 = channel 4 red LED4 (ready system4)

      P14 = channel 1 relay (start system1)

      P15 = channel 2 relay (start system2)

      P16 = channel 3 relay (start system3)

      P17 = channel 4 relay (start system4)

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 6

      LIST OF THE

      COMPONENTS

      List of the components

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      61 LIST OF THE COMPONETS

      RESISTORS

      CAPACITORS

      LIGHT EMITING DIODES (LEDS)- Green Red

      RELAYrsquoS-

      TRANSFORMERS

      RECTIFIER BRIDGES (W 10)

      OSCILLATOR

      SWITCHES- Push switches

      DARLINGTON PAIR IC (ULN2003a)

      SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

      SERIAL COMMUNICATION DRIVER IC (MAX 232)

      OPTOCOUPLER IC (4N33)

      MICROCONTROLLER IC (89V51 RD2)

      RELIMATE CONNECTOR- 2 pin amp 4 pin

      RS-232 PORT CONNECTOR

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 7

      INTRODUCTION

      OF COMPONENTS

      Working of components

      Features or Uses of components

      Testing of components

      71 RESISTOR

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      711 WORKING

      Resistors limit current Resistors are considered to be the most used and the most

      important component of all the electronic circuits Resistors resist the flow of electrical

      current The higher the value of resistance (measured in ohms)

      the lower the current will be

      712 TESTING

      Read the indicated color code value then select the OHM-scale within but not way

      below the indicated value A resistor is good if its resistance is close to the indicated

      Tolerance should be considered with the ohmmeter reading While no resistance reading at

      all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

      ohmmeter scale settings resistor is shorted

      713 SPECIFICATIONS

      To completely specify a resistors characteristics requires knowledge of the following

      parameters-

      bull Value

      bull Tolerance

      bull Temperature Coefficient

      bull Power Rating

      The specification of a resistor may be marked on its surface using either of two

      systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

      the second more recent system uses a combination of alpha-numeric characters

      7 2 CAPACITOR

      721 WORKING

      When DC voltage is applied to the capacitor an electric charge is stored on each

      electrode While the capacitor is charging up current flows The current will stop flowing

      when the capacitor has fully charged Capacitors find use

      in circuits for a variety of purposes They are used in

      time delay generation RC circuits In power supplies for filtering and power supply

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      decoupling as blocking capacitors for power factor correction and motor starting in LC

      tank circuits and so on

      722 TESTING

      To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

      negative probe to the capacitor positive terminal the positive probe to the negative terminal

      A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

      and moves back again to infinite resistance position A defective indication for an

      electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

      which is an indication that the capacitor is shorted

      73 LIGHT EMITING DIODE (LED)

      731 WORKING

      LEDs are special diodes that emit light when

      connected in a circuit They are frequently used as pilot lights in electronic appliances to

      indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

      the heart of an LED the semi-conductor chip

      In our project Green LED are used here for mainly two purpose

      a Charging ON indication (when ON)

      b Channel fault indication (always OFF)

      732 TESTING

      The good and working LED will then light up or glow a busted LED will not LEDs

      must have a resistor in series to limit the current to a safe value for quick testing purposes a

      1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

      directly connected to a battery or power supply It will be destroyed the LED

      733 FEATURES

      Single color

      High bright output

      Low power consumption

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      High reliability and long life

      734 Descriptions

      Dice material GaInN

      Emitting Color Super Bright White

      Device Outlineφ5mm Round Type

      Lens Type Water Clear

      74 RELAY

      741 WORKING

      A relay is an electrically operated switch Current

      flowing through the coil of the relay creates a magnetic field

      which attracts a lever and changes the switch contacts The coil

      current can be on or off so relays have two switch positions and

      most have double throw (changeover) switch contacts

      Relays are like remote control switches and are used in

      many applications because of their relative simplicity long life

      and proven high reliability

      742 USES

      The main operation of a relay comes in places where only a low-power signal can be

      used to control a circuit

      It is also used in places where only one signal can be used to control a lot of circuits

      The application of relays started during the invention of telephones They played an

      important role in switching calls in telephone exchanges They were also used in

      long distance telegraphy They were used to switch the signal coming from one

      source to another destination

      743 TESTING

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      A relay will usually have a coil pole terminal and a set of

      contacts The set of contacts that are open when the relay is not

      energized are called normally open (NO) contacts and the set of

      contacts that are closed when the relay is not energized are called

      normally closed (NC) contacts The following steps can be used to perform the testing of

      the relay using a multimeter

      Keep the multimeter in the continuity check mode

      Check for continuity between the NC contacts and pole

      Check for discontinuity between NO contacts and the pole

      Now energies the relay using the rated voltage For example use a 9V battery for

      energizing a 9V relay The relay will engage with clicking sound

      Now check for continuity between NO contacts and pole

      Also check for discontinuity between NC contacts and pole

      As a final test measure the resistance of the relay coil using a multimeter and check

      whether it is matching to the value stated by the manufacturer

      If all the above tests are positive we can conclude that the relay is healthy

      75 TRANSFORMER

      751 WORKING

      A transformer is a device that transfers electrical energy

      from one circuit to another through inductively coupled

      electrical conductors A changing current in the first circuit (the

      primary) creates a changing magnetic field

      This changing magnetic field induces a changing voltage in the second circuit (the

      secondary) This effect is called mutual induction

      If a load is connected to the secondary circuit electric charge will flow in the

      secondary winding of the transformer and transfer energy from the primary circuit to the

      load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

      of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

      number of primary turns

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      By appropriate selection of the numbers of turns a transformer thus allows an

      alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

      making it less

      752 TESTING

      1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

      scale and then adjusting the knob to verify its reading is an easy step to the

      reading of the ohm

      2 To check the resistance of the coil unplug or unsolder the leads of the

      transformer from its circuit and measure the resistance of each coil

      3 The next step is to test each coil for shorts to other coils

      76 RECTIFIER BRIDGE (W 10)

      761 WORKING

      A diode bridge rectifier is a device for converting AC or

      alternating current electricity into DC or direct current AC

      electricity goes from positive to negative constantly whereas DC

      always flows in the same direction

      AC electricity is more efficient to transmit and easier to

      convert into different voltages However most appliances need DC current to run A diode

      bridge rectifier is the most common type of power supply used to provide this current In

      our project W10 is a bridge rectifier which provides on single semiconductor chip

      77 OSCILLATOR

      771 Working

      An oscillator puts out an endless series of pulses The output

      constantly goes from 0 volts to Vcc and back to 0 volts again Almost

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      all digital circuits have some type of oscillator This stream of output pulses is often

      called a clock One of the most important features of any oscillator is its frequency stability

      or in other words its ability to provide a constant frequency output under varying load

      conditions Some of the factors that affect the frequency stability of an oscillator include

      temperature variations in the load and changes in the DC power supply Frequency stability

      of the output signal can be improved by the proper selection of the components used for the

      resonant feedback circuit including the amplifier but there is a limit to the stability that can

      be obtained from normal LC and RC tank circuits

      In our project instead of 12MHz crystal 110592MHz is used because it can be

      divided to give you exact clock rates for most of the common baud rates for the UART

      especially for the higher speeds (9600 19200) These crystals are readily available and

      commonly used

      78 SWITCH

      781 WORKING

      The most familiar form of switch is a manually operated

      electromechanical device with one or more sets of electrical contacts

      Each set of contacts can be in one of two states either closed meaning

      the contacts are touching and electricity can flow between them or

      open meaning the contacts are separated and the switch is non

      conducting The mechanism actuating the transition between these two

      states (open or closed) can be either a toggle (flip switch for continuous on or off) or

      momentary (push-for on or push-for off) type

      782 USES

      In electronics a switch is an electrical component that can break an electrical

      circuit interrupting the current or diverting it from one conductor to another

      783 TESTING

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      When the switch is ON it looks and acts like a wire When the switch is OFF there is

      no connection Switch can tested by using multimeter in continuity range

      79 DARLINGTON PAIR IC (ULN2003a)

      791 WORKING

      The Darlington transistor (often called a Darlington pair) is a

      compound structure consisting of two bipolar transistors (either

      integrated or separated devices) connected in such a way that the

      current amplified by the first transistor is amplified further by the

      second one This configuration gives a much higher current gain than

      each transistor taken separately and in the case of integrated devices

      can take less space than two individual transistors because they can

      use a shared collector

      Integrated Darlington pairs come packaged singly in

      transistor-like packages or as an array of devices (usually eight) in an integrated circuit

      The Darlington transistor array used is ULN2003 Applications include relay

      drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

      drivers and logic buffers Each input of this device has a zener diode and resistor in series

      to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

      for each Darlington pair for operation directly with TTL or 5-V CMOS devices

      792 FEATURES

      The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

      transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

      with common-cathode clamp diodes for switching inductive loads The collector-current

      rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

      higher current capability

      710 SERIES VOLTAGE REGULATER IC (78XX)

      7101 WORKING

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Voltage Regulator (regulator) usually having three legs converts varying input

      voltage and produces a constant regulated output voltage They are available in a variety of

      outputs

      The most common part numbers start with the numbers 78 or 79 and finish with two

      digits indicating the output voltage The number 78 represents positive voltage and 79

      negative one The 78XX series of voltage regulators are designed for positive input

      The LM78XX series typically has the ability to drive current up to 1A For

      application requirements up to 150mA 78LXX can be used As mentioned above the

      component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

      an output leg with the regulators voltage

      As a general rule the input voltage should be limited to 2 to 3 volts above the output

      voltage The LM78XX series can handle up to 36 volts input be advised that the power

      difference between the input and output appears as heat If the input voltage is unnecessarily

      high the regulator will overheat Unless sufficient heat dissipation is provided through heat

      sinking the regulator will shut down

      711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

      7111 WORKING

      The MAX-232 It includes a Charge Pump which generates

      +10V and -10V from a single 5v supply

      This IC also includes two receivers and two transmitters in

      the same package This is handy in many cases when we only want to

      use the Transmit and Receive data Lines We dont need to use two chips one for the

      receive line and one for the transmit There are also many variations of these devices The

      large value of capacitors are not only bulky but also expensive Therefore other devices are

      available which use smaller capacitors and even some with inbuilt capacitors However the

      MAX-232 is the most common and thus we will use this RS-232 Level Converter

      Dual Charge-Pump Voltage Converter

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

      V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

      output

      712 OPTOCOUPLER IC (4N33)

      7121 WORKING

      In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

      photoMOS) is a device that uses a short optical transmission path to transfer a signal

      between elements of a circuit typically a transmitter and a receiver while keeping them

      electrically isolated mdash since the signal goes from an electrical signal to an optical signal

      back to an electrical signal electrical contact along the path is broken

      Optocouplers typically come in a small 6-pin or 8-pin IC package but are

      essentially a combination of two distinct devices an optical transmitter typically a gallium

      arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

      light-triggered diac The two are separated by a transparent barrier which blocks any

      electrical current flow between the two but does allow the passage of light

      The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

      silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

      of isolation between driving and load circuits These Optocouplers can be used to replace

      reed and mercury relays with advantages of long life high speed switching and elimination

      of magnetic field

      713 MICROCONTROLLER IC (89V51 RD 2 )

      713 WORKING

      The P89V51RD2 is an 80C51 microcontroller with 64

      kB Flash and 1024 bytes of data RAM

      A key feature of the P89V51RD2 is its X2 mode option

      The design engineer can choose to run the application with the conventional 80C51 clock

      rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      achieve twice the throughput at the same clock frequency Another way to benefit from this

      feature is to keep the same performance by reducing the clock frequency by half thus

      dramatically reducing the EMI

      The Flash program memory supports both parallel programming and in serial In-

      System Programming (ISP) Parallel programming mode offers gang-programming at high

      speed reducing programming costs and time to market ISP allows a device to be

      reprogrammed in the end product under software control The capability to fieldupdate the

      application firmware makes a wide range of applications possible The P89V51RD2 is also

      In-Application Programmable (IAP) allowing the Flash program memory to be

      reconfigured even while the application is running

      714 RELIMATE CONNECTOR

      7141 WORKING

      These are wire to board type connectors used to facilitate

      proper and firm electrical connection between the relay card and

      microcontroller card

      The connector has following specifications

      No of Ways 2-20

      Voltage Rating 250V AC DC

      Current Rating 3A AC DC

      Contact Resistance 20mW max

      Insulation Resistance 1000MW min

      Dielectric Withstanding 1000V ACminute

      Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

      The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

      connector is it provides a fast and easy connection and disconnection it also avoids polarity

      conflicts

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      715 RS-232 PORT CONNECTOR

      7151 WORKING

      Almost all digital devices which we use require either TTL

      or CMOS logic levels Therefore the first step to connecting a

      device to the RS-232 port is to transform the RS-232 levels back

      into 0 and 5 Volts This is done by RS-232 Level Converters

      Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

      Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

      The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

      problem in many instances where only a single supply of +5V is present

      CHAPTER 8

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      IMPLIMENTATION

      OF THE PCB

      Components layout designing

      Developing or Etching the PCB

      Other operations like Drilling Cutting Tinning

      81 IMPLIMENTATION OF THE PCB

      A proper PCB ensure that various circuit components are interconnected as per the

      circuit diagram once they have been placed on the PCB in their proper positions and

      subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

      base material to which is permanently attached a flat metallic network of conducting path

      whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

      for this project is single one

      The basic material used may be resin coated paper fiber glass ceramic and the flat

      board configuration however is most widely used and it may be of the nature of the single

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

      which ensures adequate and permanent low resistance coupling

      811 BOARD DESIGN

      PCB designed is the most important and requires great care during work In this case

      great care must be taken while tracing the circuit or layout on the board Because once PCB

      is designed it is virtually impossible to alter it While designing a circuit designer should

      take care to avoid crossing of conducting path (tracks) as possible Crossover are

      unavoidable then only of the jumper can be used A circuit board carrying on both sides can

      also help to solve this problem when circuit is complicated

      812 THE MASTER DIAGRAM

      The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

      which is commonly made twice as the finished circuit since this makes the working on that

      much easier especially when circuit is complicated photography eventually reduces the

      size of diagram to that of the circuit before proceeding we must know some rules regarding

      the designing -

      a The space between the conductors must be strictly controlled to avoid the possibility

      of electrical discharges or unwanted capacitance The amount by which the mater

      diagram is to reduce in size is thus a critical deign feature

      b The conductor must be wider in those part of the circuits that are going to handle

      large current must be handle without undue temperature of conductors

      c The minimum width of copper should not generally be less than about 15mmThis

      is related to mechanical strength rather than electrical properties and it also ensure

      that strips remains securely bounded to the base material

      d The points where the component holes for component lead wire occurs must be sited

      to suit the dimensions of the component and dimensions between lead-out wire so

      that the components can be situated correctly on finished board The conductor is

      also main large at the point of holes

      813 PCB MAKING

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      When the mater diagram probable twice the size of real PCB has been evolved the

      test major step consists of etching or dissolving the unwanted metal from copper claded

      board to create a circuit as depicted by master diagram It must be stressed that very

      accurate checking master is essential at this stage Then the master point is mounted on a

      special frame on easy facing of a larger camera and with the aid of the very powerful

      illumination a master diagram is clearly photographed on a glass sensitive plate This is

      developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

      brought into operation This comprises the camera body mounted so that sideways after

      each exposure In this way number of copies of the original master diagram is set out

      exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

      In case of simple and need of number of less PCB economic and advisable to use the

      following lab method of PCB making

      Planning The Circuit

      It is not a particular difficult There are several important factors that need not be

      taken into account if the finished device is to work properly we must consider gain factor

      and ensure that the input and output parts are sufficiently well isolated to avoid the

      possibility We must also ensure that conductors and components carrying high frequency

      current are well separated from the part of the circuit We are also to make sure that all

      components need to return to earth are properly connected and that possibility of common

      impedance arising earth returned

      Circuit is totally eliminated by making all earth as substantial possible consistent

      with nature of design Other factors that have to successfully studied include availability of

      adequate return points on board and itrsquos mounting from accessibility of switch connection

      made for mechanical fixing ventilation effect of vibration

      Cleaning The Board

      The copper side of the board must be thoroughly cleaned before circuit plan is

      transferred to it This is important because even slightest trace of graze (from figure of

      instance) will impure the etching process and when the circuit plan has been neatly

      transferred to copper in this manner the board is held under running tap and the allowed to

      dry before resist is applied

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Transforming the Plan

      Now once cleaning is done plan has to transfer on copper surface of PCB material

      A convenient way to do this is simply put the carbon paper between a copper surface of the

      board and working plan and carefully trace the lines of original plan with a ball pen

      Resist

      Resist is nothing more than a substrate that is unaffected by presence etching

      chemicals It is usually colored so that it can be easily seen the copper surface when plan is

      clearly worked on clean copper that are to be left in fact as the copper conductor must be

      covered when resists the leaguer type of paints possess good resist properties but

      disadvantage of relatively long time taken for drying It is essential to resist through

      hardening before etching is started Nail polished are better as they quickly and are less

      difficult to remove

      To overcome this drying effect and to achieve the sharp edge of the trace on the

      PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

      short circulating due to paints are completely the avoid etching tapes and pads are available

      in different sizes

      Correcting Error

      When a result has been thoroughly hardened any errors that have been made can

      usually be corrected by gently scratching away with knife To ensure clear out lines round

      edges of copper conductors on board the resist must be applied with steady band

      Etching

      Next comes etching of unwanted copper amp whether a small single is all that is

      required as quantity of board to be produce certain precautions must be taken before

      operation is commenced the most used etch amp I ferrite chloride to this is added small

      quantity of HCL to accelerate But not critical as lab construction concerned A good

      etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

      grams of water

      Agitation

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

      the etchant process The depth of liquid must be sufficient to completely cover laminate the

      laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

      gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

      temperature and thickness of copper foil

      Finishing Off

      When all unwanted copper is dissolved from areas between conductor board should

      be taken from an etchant amp washed in water The resist must be removed using proper

      solvent After this the copper surface must be polished with any kind of cleaner It should be

      seen that there is no slight incomplete etching between the conducting parts of the PCB The

      PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

      This process is called Tinning This process of coating involve track with soldier

      Advantage of tinning the effect of environment of conductors then PCB is drilled

      ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

      Assembling On PCB

      After the holes are drilled the component have to be assembled on PCB before

      assembling the components it is necessary to clean soldering iron in order to get easy amp

      accurate soldering Removing impurity particles that are gathered on iron bit due to

      repetitive use cleans soldering iron

      CHAPTER 9

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      SOLDERING

      TECHNIQUE

      Technique for good soldering

      91 SOLDERING TECHNIQUE

      For soldering of any joints first the terminal to be soldered are cleaned to remove

      oxide film or dirt on it If required flux is applied on the points to be soldered

      Now the joint to be soldered is heated with the help of soldering iron Heat

      applied should be such that when solder wire is touched to joint it must melt

      quickly

      The joint and the soldering iron is held such that molten solder should flow

      smoothly over the joint

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      When joint is completely covered with molten solder the soldering iron is re-

      moved

      The joint is allowed to cool without any movement

      The bright shining solder indicates good soldering

      In case of dry solder joint a air gap remains in between the solder material and

      the joint It means that soldering is improper This is removed and again solder-

      ing is done

      Thus this way all the components are soldered on P C B

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 10

      PCB LAYOUTS

      Schematic diagram

      Bottom and top layout

      101 POWER SUPPLY CARD

      1011 SCHIMETIC DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1012 LEGEND MARKING

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

      Fig1011 Schematic diagram of power supply card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1013TOP LAYER

      1014 BOTTOM LAYER

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

      Fig1013 Top layer of power supply

      card

      Fig1014 Schematic diagram of power supply card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      102 BATTERY CHARGER CARD

      1021 SCHEMATIC DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

      Fig1021 Schematic diagram of battery charger card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      103 RELAY CARD

      1031 SCHIMETIC DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

      Fig1031 Schematic diagram of Relay card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1032 RELAY CARD LEGEND MARKING

      1033 TOP LAYER

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

      Fig1032 Legend marking of Relay card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1034 BOTTOM LAYER

      104 MICROCONTROLER CARD

      1041 SCHIMETIC DIAGRAM

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

      Fig1034 Bottom layer of Relay card

      Fig1041 Schematic diagram of microcontroller card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1042 ALL LAYERS

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

      Fig1042 All layer of microcontroller card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 11

      INTRODUCTION

      OF SOFTWARE

      Keil (microVision 2)

      Eagle (Easily Applicable Graphical Layout Editor)

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      111 Keil (microVision 2)

      1111 Introduction to C51 Cross Compiler

      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

      generate fast compact code for the 8051 microcontroller family The C51 Compiler

      generates object code that matches the efficiency and speed of assembly programming

      Using a high-level language like C has many advantages over assembly language

      programming

      Knowledge of the processor instruction set is not required Rudimentary knowledge of

      the memory structure of the 8051 CPU is desirable (but not necessary)

      Details like register allocation and addressing of the various memory types and data

      types is managed by the compiler

      Programs get a formal structure (which is imposed by the C programming language) and

      can be divided into separate functions This contributes to source code reusability as

      well as better overall application structure

      The ability to combine variable selection with specific operations improves program

      readability

      Keywords and operational functions that more nearly resemble the human thought

      process may be used

      Programming and program test time is drastically reduced

      The C run-time library contains many standard routines such as formatted output

      numeric conversions and floating-point arithmetic

      Existing program parts can be more easily included into new programs because of

      modular program construction techniques

      The language C is a very portable language (based on the ANSI standard) that enjoys

      wide popular support and is easily obtained for most systems Existing program

      investments can be quickly adapted to other processors as needed

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1112 Software Development Cycle in Keil

      When we use the Keil Software tools the

      project development cycle is roughly the same as

      it is for any other software development project

      1 Create a project select the target chip from the

      device database and configure the tool settings

      2 Create source files in C or assembly

      3 Build your application with the project

      manager

      4 Correct errors in source files

      5 Test the linked application A block diagram of

      the complete 8051 tool set may best illustrate the

      development cycle

      112 Eagle (Easily Applicable Graphical Layout Editor)

      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

      printed circuit boards (PCBs) It is a complete platform for the development of any type of

      complicated amp sophisticated multilayered PCBs This software consist of the following tool

      1121 Schematic Editor

      In this one can develop amp design circuits for the required PCB

      1122 Layout Editor

      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

      Fig 111 Software development in KEIL

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1123 Library Editor

      This is very useful in case of customized component design that does not occur in the predefined library according to our need

      1124 Auto Router

      This is an artificial intelligence based tool or subroutine that can do auto routing of

      the PCB tracks designed

      1125 Cam Processor

      This is used to finally print the various layers of the designed PCB viz Top Layer

      Bottom Layer Component Layer Masking Layer etc

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

      Start

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 12

      INTRODUCTION

      OF

      PROGRAMMING

      Flowchart of programming

      Program code

      121 Flowchart

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

      2

      flag9==1

      flag9=1

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

      flag11==1

      flag11=1 flag11=0 flag4=0

      REady_LED4=0

      Sw2_op (P01) ==0

      My delay (10)

      3 3

      flag2=1 disp2=1 k2=0

      3

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

      4

      flag11==1

      flag11=0 flag4=0 REady_LED4=0

      flag11=1

      My delay (10)

      flag3=1 disp3=1 k3=0

      k1==0||k2==0||k4==0

      Sw3_op (P02) ==0

      5

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

      flag5==1

      5

      flag11==1

      flag7=1

      flag7==1

      flag7=0 flag2=0 REady_LED2=0

      6

      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

      flag11=0 flag4=0 REady_LED4=0

      flag11=1

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

      6

      My delay (10)

      flag4=1 disp4=1 k4=0

      k1==0||k2==0||k3==0 flag5==1

      7

      Sw4_op (P03) ==0

      flag5=1 flag5=0 flag1=0 REady_LED1=0

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

      7

      flag7==1

      flag9==1

      flag7=1

      flag7=0 flag2=0 REady_LED2=0

      flag9=0 flag3=0 REady_LED3=0

      flag9=1

      Sw5_op A(P04) ==0

      My delay (10)

      8

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

      9

      flag2==1

      flag3==1

      8

      flag1==1

      flag4==1 flag5=1 disp5=1

      flag9=1 disp5=1

      flag7=1 disp5=1

      flag11=1 disp5=1

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

      Sw6_op (P05) ==0

      My delay (10)

      flag2==1 ampamp flag7==1

      flag3==1 ampamp flag9==1 9

      flag1==1 ampamp flag5==1 flag6=1 disp6=1

      flag8=1 disp6=1

      10

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

      10

      flag4==1 ampamp flag11==1

      flag10=1 disp6=1

      flag12=1 disp6=1

      flag8==1

      flag10==1

      11

      flag6==1

      i++

      l++

      j++

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

      flag12==1

      M++

      11

      Stop

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      122 Program

      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

      define buzzerP2_0 buzzer indication

      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

      sbit sw5_op=P0^4 input switch5 for coin

      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

      output Led for indication

      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

      function prototype declaration

      void my_delay(unsigned int value) DELAY FUCTION

      void init_timer() timer 0 initialization function

      variable declaration

      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      start of main programme

      void main()

      init_timer() call it timer initialization function

      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

      start of while loop

      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

      condition for switch1

      if(flag1==1) check swich1 pressed if(disp1==1 )

      REady_LED1=1 turn on Ready indication of led 1 disp1=0

      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

      if(iltk) loop will repeat for desired time of charging

      if(igt=1000)

      buzzer=1 turn on buzzer if (ii==20)

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      REady_LED1=1 turn on ready indication of led1

      else if(ii==40)

      REady_LED1=0ii=0

      elseREady_LED1=0

      START_LED1=1

      else

      START_LED1=0

      k1=1 buzzer=0

      REady_LED1=0 flag1=0

      flag5=0flag6=0

      condition for switch2

      if(flag2==1) check swich2 pressed if(disp2==1)

      REady_LED2=1 turn on ready 2 led indication

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      disp2=0

      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

      if(jltk)

      if(jgt1000) buzzer=1 if(jj==20)

      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

      elseREady_LED2=0

      START_LED2=1

      else START_LED2=0

      REady_LED2=0 k2=1 buzzer=0

      flag2=0flag7=0flag8=0

      j=0jj=0

      condition for switch 3

      if(flag3==1) check swich3 pressed

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      if(disp3==1 )

      REady_LED3=1 disp3=0

      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

      if(lltk)

      if(lgt1000) buzzer=1 if(ll==20)

      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

      elseREady_LED3=0

      START_LED3=1

      else START_LED3=0

      LED2=0 k3=1 buzzer=0

      REady_LED3=0 flag3=0

      flag9=0flag10=0

      l=0ll=0

      condition for switch 4

      if(flag4==1) check swich4 pressed if(disp4==1 )

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      REady_LED4=1 disp4=0

      if(flag11==1) check coin is pressed

      if(flag12==1) START is pressed

      if(mltk)

      if(mgt1000)

      buzzer=1 if(mm==20)

      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

      elseREady_LED4=0

      START_LED4=1

      else START_LED4=0

      buzzer=0 k4=1

      REady_LED4=0 flag4=0

      flag11=0flag12=0

      m=0mm=0

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      while(1)

      end of main programme

      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

      whenever specific time the interrupt will generate control will go in following function

      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if(sw1_op==0 ) ready switch flag for system1

      my_delay(10) CALL DELAY FUNCTION

      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

      if(flag7==1) SET THE FLAG

      flag7=1

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

      flag9=1

      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

      flag11=1

      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if(sw2_op==0 ) fready switch flag for system2

      my_delay (10)

      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

      if(flag5==1)

      flag5=1

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

      flag9=1

      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

      flag11=1

      elseflag11=0flag4=0REady_LED4=0

      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

      if(flag7==1)

      flag7=1

      else

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      flag7=0flag2=0REady_LED2=0 if(flag5==1)

      flag5=1

      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

      flag11=1

      elseflag11=0flag4=0REady_LED4=0

      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

      if(flag7==1)

      flag7=1

      elseflag7=0

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      flag2=0REady_LED2=0 if(flag5==1)

      flag5=1

      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

      flag9=1

      elseflag9=0flag3=0REady_LED3=0

      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      disp5=1 if(flag4==1 ) flag11=1 disp5=1

      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

      if(flag6==1)

      i++ if (igt1000) ii++

      if (flag8==1)

      j++ if(jgt1000) jj++

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      if (flag10==1)

      l++ if (lgt1000) ll++

      if (flag12==1)

      m++ if (mgt1000) mm++

      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 13

      TROUBLE SHOOT

      Troubleshoot

      131 TROUBLE SHOOT

      A newly assembled circuit does not work may be due to -

      Faulty components

      Improper soldering

      Wrong connections

      Also any stop in working after some period may be due to -

      Component failure

      Supply failure

      Damaging of PCB

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Fault finding is very essential if you want the circuit to operate properly

      If a newly assembled circuit is not working properly check all the components and

      circuit connections according to the diagram The circuit may not be working due to wrong

      polarity of capacitor diode and wrong supply terminal connection Most of the times the

      circuit does not work due to bad soldering Therefore proper procedure is followed to have

      proper soldering

      If faults are not observed during physical observations one should proceed for Hot

      test ie Voltage measurement at different points for example at Input terminal etc

      Resistance measurement is also done which is known as Dry test

      During this project work some green LEDs was not glow then we checked it

      continuity and replace it

      Also relay was not properly worked therefore we replaced it Some ICs was get

      heated after starting the project It happens because of some soldering points are shorted

      during soldering PCB We solved that problem

      CHAPTER 14

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      ADVANTAGES OF

      THE PROJECT

      Advantages

      141 ADVANTAGES OF THE PROJECT

      Simple and hand efficient Microcontroller based system

      Fast charging capacity

      Simple to operate

      Ease of mobility

      Facilitates connectivity for 90 of cellular phones

      Less expensive

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Reduced man power

      Low power consumption

      It can offer emergency charging for 4sets of handsets synchronously

      CHAPTER 15

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      DISADVANTAGES

      OF THE PROJECT

      Disadvantages

      151 DISADVANTAGES OF THE PROJECT

      It requires mains supply to work project

      Due to limited charging channels till now there may be a possibility that

      mobile phones of few brands cannot be connected for charging For this

      purpose we have to use separate connectors for that specific brand differently

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

      min

      It does not have battery backup therefore it cannot be portable

      CHAPTER 16

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      APPLICATIONS OF

      THE PROJECT

      Application

      161 APPLICATIONS OF THE PROJECT

      The coin based mobile phone charger is very useful to public for using coin to

      charge for the mobile phone in any places

      It is used for emergency charging purposes

      It can be installed in malls railway stations bus stops and other public

      places

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      The charger offers a unique revenue opportunity for a vast range of

      businesses - from airports to pubs from universities to health clubs virtually

      any location where there is a high footfall creating a large number of

      potential users

      It can be installed in offices and collages for pay charging facility

      CHAPTER 17

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      FUTURE

      DEVELOPMENT OF

      THE PROJECT

      FUTURE DEVELOPMENT OF THE PROJECT

      171 FUTURE DEVELOPMENTOFTHE PROJECT

      This project is very useful to people who are using mobile phone without charging

      condition in public places

      It will use with a stereo advertisement carrier that can display video advertisement

      It will provide battery backup for make it portable

      It will also provide SMS system in future

      We can also increase the charging time by editing software of the project

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 18

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      COST ANALYSIS

      OF THE PROJECT

      COST ANALYSIS OF THE PROJECT

      181 COST ANALYSIS OF THE PROJECT

      1811 Component list for power supply card

      Footprint Quantity Designators Rate

      Resistor

      22K 1 R2 1

      1K 1 R1 1

      Capacitor

      1000uf25V 1 C5 10

      2200uf25V 1 C1 10

      022uf 2 C6 C2 1

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

      Table 1811 Component list for power supply card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      01uf 2 C4 C3 1

      IC

      BRIDGE W10 2 BR2 BR1 10

      L7812CV (TO-220) 1 U2 8

      L7805CV (TO-220) 1 U1 8

      Connector

      CON PHO 2PIN 2 J3 J2 16

      CON PHO 3PIN 1 J1 12

      LED3mm red 2 L1 L2 15

      Heat sink (TO-220) 2 16

      Total 955

      1812 Component list for battery charger card

      Footprint Quantity Rate

      Capacitor

      2200uf25V 1 1000

      022uf 4 100

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      01uf 4 100

      IC

      BRIDGE W10 1 500

      L7805CV (TO-220) 4 3200

      Connector

      CON PHO 2PIN 1 800

      Relimate 2 pin 1 400

      relimate 3 pin 4 2000

      Heat sink (TO-220) 4 1200

      TOTAL 9300

      1813 Component list for Relay card

      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

      Table 1812Component list for battery charger card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      RELIM-4 1 J1 700 16 pin ic socket 1 400

      Total 18900

      1814Component list for controller card

      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

      Table 1813Component list for relay card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

      total 27000

      1815 Miscellaneous material

      Material Quantity Rate

      electronic item

      Transformer

      TXR1 0-9-15 1 20000

      0-9 1A

      0-15 100mA

      TXR2 0-9 1 16500

      0-9 1A

      Proximity switch 1 20000

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

      Table 1814Component list for microcontroller card

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Red push bottom 4 4000

      Green push button 1 1000

      Red led 5mm 4 800

      Green led 5mm 4 800

      Led holder 8 1600

      Copper clad 2 4000

      3 core cable 1 meter 1500

      3 pin plug 1 3000

      2 pin relimate wire 19 9000

      3 pin relimate wire 5 3750

      4 pin relimate wire 2 2000

      mechanical items

      Enclosure 1 25000

      Acrylic sheet 2 X 1 30000

      12mm cable gland 1 1000

      Screw 3mm 33 2000

      Screw 35mm 6 2400

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      10 mm spacers 100 1500

      10mm insert to stud 50 10000

      cable tie 2500

      Total 162350

      CHAPTER 19

      APPENDIX

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

      Table 1815Component list for miscellaneous material

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      APPENDIX

      191 APPENDIX

      1911 78xx IC datasheet

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1912 W10 datasheet

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1913 4n33 IC datasheet

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

      1914 MAX 232

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1915 ULN2003a IC datasheet

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      1916 89V51RD2 IC datasheet

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 20

      CONCLUSION

      CONCLUSION

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      201 CONCLUSION

      The coin-operated mobile phone charger is already successfully installed in

      hundreds of locations worldwide providing a unique service to the public and a source of

      revenue for site providers The coin-operated mobile charger can be quickly and easily

      installed in any business premises

      The charger offers a unique revenue opportunity for a vast range of businesses ndash

      from airports to pubs from universities to health clubs virtually any location where there is

      a high footfall creating a large number of potential users

      The charger can charge up to 4 different mobile phones simultaneously It will

      extend low mobile phone talk time provide battery charging

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 21

      IMAGES OF THE

      PROJECT

      Images of the project

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      211 IMAGES OF THE PROJECT

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

      fig211 lsquoCoin operated mobile battery charger

      Fig212 Circuit arrangement of coin operated mobile battery charger

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Fig 216 Relay driver circuit

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

      Fig 213 Constant voltage battery charger circuit

      Fig214 Power supply circuit

      Fig215 Metal detector proximity switch

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Fig217 Microcontroller circuit

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      Fig228 coin operated mobile battery charger project presentation

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      CHAPTER 22

      BIBILOGRAPHY

      BIBLIOGRAPHY

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

      221 BIBLIOGRAPHY

      BOOKS

      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

      INTERNET LINKS

      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

      • CHAPTER 1

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        21 Introduction

        With mobile phones becoming the major source of businesspersonal

        communication the mobile phone business is currently worth billions of dollars and

        supports millions of phones

        The need to provide a public charging service is essential Many critics argued that a

        public mobile phone charging service is not a lucrative business because most users can

        charge their phones at home in their office or in their cars

        Emergency Coin Operated Mobile Phone Charger is a new business milestone

        because many are attending business conventions and forgetting their charger at home or in

        hotel rooms

        Students and many that use the public transportation that dont know that their level

        of their battery is low are prospective customers for coin operated mobile phone charger

        service

        Recommended locations include Hotels conference centers exhibition halls

        serviced offices exchange halls motels leisure centers health clubs training centers golf

        clubs retail outlets shopping malls Internet cafes universities colleges hall of residence

        airports train terminals etc so that the mobile phone users can reactivate a low or dead

        battery by simply plugging in and charging for as low as one rupees

        22 Functional description

        The coin operated public cell phone charger is a cell phone charging station having

        four charging channels providing charging facility to various type of cell phones The

        number of channels can be increased further Each channel can be operated simultaneously

        Each and every channel is having a select switch which can be called as channel

        select switch with a red LED as an indicator for selected channel Also there is a START

        switch and a COIN inlet which is common for all the channels

        The operation of coin operated chargers is very simple The user who wishes to

        charge his cell phone has to first check out for the compatible charger jack in a channel

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 4

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Then he has to press select switch in order to make channel ready for charging the

        selected channel will be indicated by a red LED

        The channel will remain in selected mode for 30 sec Hence within 30 sec the user

        has to first insert the predefined rupee coin and then has to press START switch which will

        finally start the charging process for a predefined time and is indicated by a green LED

        If failing to do so within 1 min will reset the channel and the user has to again

        follow the same procedure

        Any other channel selection is not considered within 30 sec of previous channel if

        selected or until it has entered in to charging mode

        Completion of charging will be indicated by an OFF green LED

        23 Technology Used

        Coin recognition using proximity switch(metal detector)

        Constant voltage charger

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 5

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 3

        DEVELOPMENT

        STAGES amp

        PROCESS

        Development stages and process of the project

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 6

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        31 DEVELOPMENT STAGES amp PROCESS

        The complete development of this project can be divided into the following stages

        Problem definition stage

        Designing block diagram

        Implementing circuits and components

        Developing algorithm for software

        Writing actual code for Microcontroller

        Compiling the code

        Burning the hex file into microcontroller with programmer

        Testing and Running

        311 Problem definition stage

        This is the very first stage to develop any project It actually defines the aim

        and the concept of the project At inconvenient times when access to a standard

        charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

        designed to solve this problem The charger operates like a vending machine all a

        user has to do is plug the mobile phone into one of the four adapters and insert a

        coin the phone will then be given a micro-pulse fast charge in just 10 minutes

        312 Designing block diagram

        At this stage we have categorized the whole system into different individual

        modules These modules (block diagrams) will be helpful in understanding the

        concept and working of the integrated system It also simplifies the entire debugging

        and testing process

        313 Implementing circuits and components

        This is the actual implementation of circuit of each block At this stage we

        have actually designed each block separately and finally integrated them into the

        complete working system

        314 Developing for software

        To get the logical flow of the software the development of algorithm having

        a prominent role So that we have to analyze the complete system and organized the

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        algorithm in such a manner that one can understand the complete working of the

        software

        315 Writing actual code for Microcontroller

        After the development of the algorithm and flowchart we have actually

        translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

        that it can understand the instructions and run as per our requirement The

        instructions are in ANSII C Language

        316 Compiling the code

        The hand written code on paper was then transferred into computer For that

        we have used Keil pre-install on PC The Keil is a Computer Aided Program to

        simulate the working of Microcontroller in real time without burning the software

        into actual IC We simulated and compiled our program for error checking After

        removing several compiling errors the program was converted into machine language

        ie Philips hex format

        317 Burning the hex file into microcontroller with Programmer

        In this stage the compiled hex format file was downloaded or burned into

        flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

        system programming software provided by the manufacturer itself

        318 Testing and Running

        This time we tested our project for actual working after loading the Software

        into the microcontroller Any errors found were removed successfully This is the last

        and final stage of development of our project

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 4

        BLOCK DIAGRAM

        OF THE PROJECT

        Block Diagram Brief Explanation

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        41 Block Diagram

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

        Fig 41 Block diagram of the project

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        42 Brief Explanation

        421 POWER SUPPLY

        Power supply is used to deliver power to the circuit It delivers +5Vdc to

        microcontroller and other peripherals and +12Vdc delivers power to relay

        422 COIN INPUT AND LEVEL CONVERTOR

        Coin input is a sensor which senses a metal and produces an output voltage This

        voltage is high as compared to the input required for microcontroller

        Hence a level shifter is used to bring down the voltage level which could be

        readable to microcontroller

        423 START SWITCH

        Start switch is used to start the charging process of a

        mobile phone

        424 RS232 INTERFACING TO PC

        RS 232 is a protocol used for communication between

        computer and microcontroller It is also used for

        programming the microcontroller in its ISP (in system

        programming) mode

        425 CHANNEL READY INDICATOR

        It provides visual indication for the channel which is in

        charging mode

        426 DARLINGTON PAIR ARRAY

        Darlington pair array is used as a relay driver

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        427 CHANNEL IN CHARGE INDICATION

        It provides visual indication for the channel which is in

        charging mode

        428 RELAY ARRAY

        Relay array consists of relays for each channel to

        provide electromechanical switching in between charger and

        mobile phone

        429 CHARGER ARRAY

        Charger array is used to provide charging power to the

        mobile phones through the electromechanical switches

        4210 CELL PHONE TO CHARGE

        Channel select switch is used for selecting a channel on

        which the mobile phone is to be charged

        4211 MICROCONTROLLER

        Microcontroller is used to control the whole operation of

        the device Microcontroller reads input signal from input

        device and triggers the output device According to the

        conditions defined in the microcontroller by the programmer

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 5

        CIRCUIT

        DIAGRAM

        EXPLANATION

        Circuit diagram

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Circuit diagram explanation Working

        51 POWER SUPPLY CIRCUIT

        511 CIRCUIT DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

        Fig51 Circuit diagram of the power supply

        Bridge RectifierTRANSFORMER

        Filter Voltage regulator Load

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        512 WORKING

        Transformer

        A step-down transformer is used to achieve our requirements of the power

        supply It steps down high voltage ac mains to low voltage ac mains

        Bridge Rectifier

        A bridge rectifier makes use four diodes in a bridge arrangement to achieve

        full wave rectification This is a widely used configuration both with individual

        diodes wired and with single component bridges where the diode bridge is wired

        internally It also converts ac to dc but the dc output is varying

        One advantage of a bridge rectifier over a conventional full-wave rectifier is

        that with a given transformer the bridge rectifier produces a voltage output that is

        nearly twice that of the conventional full-wave circuit

        Filter

        The output of the rectifier is a pulsating dc wave We need a constant dc

        output To do this we need to filter out the oscillation from the pulsating dc wave

        This is obtained with a diode capacitor combination

        Voltage Regulator

        A voltage regulator is used for voltage regulation in the circuit This provides

        a protection to the circuits in the case of fluctuations It eliminates ripples by setting

        dc output to fixed voltages

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

        Fig 52 Block diagram of the power supply

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Load

        The load can be anything which wants to switch ON by using power supply

        513 CIRCUIT DIAGRAM EXPLANATION

        Regulated power supplies are commonly used in engineering projects Power

        supply is food of any circuit

        +5V SUPPLY UNIT

        +5V supply is obtained from the +5V supply unit for microcontroller and

        digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

        transformer having a capacity of 500mA

        Since the input voltage to the regulator IC should be more than its output

        voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

        of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

        smooth DC supply The rating of the chosen capacitor filter is 1000microF

        The regulated DC voltage is obtained by using a regulator IC 7805 In the

        case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

        Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

        output of regulator IC to eliminate the voltage oscillations at the output due to the large

        voltage oscillations at the input of the regulator

        +12V SUPPLY UNIT

        The plusmn12 V supply required by the relay is provided by the 12V supply circuit

        arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

        step down transformer having a capacity of 1A and the center tap of the transformer is

        grounded This low voltage is rectified with the help off bridge rectifier

        Since the input voltage to the regulator IC should be more than its output

        voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

        the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

        filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

        For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

        7912 is used

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

        the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

        connected at the output as shown in figure to eliminate the voltage oscillations at the

        output due to the large voltage oscillations at the input of the regulator

        52 CONSTANT VOLTAGE CHARGER

        521 CIRCUIT DIAGRAM

        Fig 53 Circuit diagram of the battery charger

        522 CIRCUIT DIAGRAM EXPLANATION

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Constant-voltage (often called constant-potential) chargers maintain nearly the same

        voltage input to the battery throughout the charging process regardless of the batterys state

        of charge Constant-voltage chargers provide a high initial current to the battery because of

        the greater potential difference between the battery and charger

        A constant-voltage charger may return as much as 70 of the previous discharge in

        the first 30 minutes This proves useful in many battery applications involving multiple

        discharge scenarios As the battery charges its voltage increases quickly This reduces the

        potential that has been driving the current with a corresponding rapid decrease in charge

        current as depicted in the illustration below As a result even though the battery reaches

        partial charge quickly obtaining a full charge requires prolonged charging

        Given this behavior constant-voltage chargers are frequently found in applications

        that normally allow extended charging periods to attain full charge Constant-voltage

        chargers should not be used where there is frequent cycling of the battery Repeated

        discharges without returning the cell to its full charge will eventually decrease the battery

        capacity and may damage individual cells

        Fig 54An Illustration graph of the charging function of constant battery charger

        Constant-voltage chargers are most often used in two very different modes as a fast

        charger to restore a high percentage of charge in a short time or as a float charger to

        minimize the effects of overcharge on batteries having infrequent discharges

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        53 RELAY DRIVER CIRCUIT

        531 CIRCUIT DIAGRAM

        532 CIRCUIT DIAGRAM EXPLANATION

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

        Fig 55 Relay driver circuit

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Input from the controller is connected to the relay card through connector J1 which

        carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

        pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

        These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

        relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

        series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

        and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

        relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

        NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

        3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

        RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

        is used to connect power supply to relay card

        533 WORKING

        While taking Relay1 (RL1) into consideration we will discuss the working of relay

        card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

        of the IC are in cut off region which causes an open circuit so there is no current flow

        flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

        applied to the two pin1 of IC U1 the internal transistor goes in to active region and

        completes the path ie provide ground to the relay coil so the current flows through the

        LED activating the relay

        As the current flows through the relay coil it gets energized and switch over the

        contacts ie common and normally open contact get connected and provide a path to flow

        current from J11 ie charger into the load connected at J4 hence the cell phone charging

        process starts The same above process is applies for all relays If LED is fused or

        damaged the path will be open and relay will not be energized and if relay is damaged the

        led will not be illuminated So the LED here is used as a FAULT indicator and a

        CHARGING ON indicator

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        54 MICROCONTORLLER CIRCUIT

        541 CIRCUIT DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        542 CIRCUIT DIAGRAM EXPLANATION

        CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

        the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

        port P04 through J4 and START switch is connected to port P05 through SW5

        Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

        P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

        Output for relay card is taken on port P14 to P17

        Components C1 R1 and push button S1 forms reset circuit which provides a power

        on reset for the micro controller and even provide manual reset Crystal XL1 is a

        110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

        22pf capacitor used as loading capacitor for crystal

        Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

        RN2 resistance network

        IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

        the proximity switch and microcontroller and convert its output readable to microcontroller

        IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

        communication between PC and a microcontroller through connector J3

        Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

        communication process

        Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

        power supply connection

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        543 PORT ASSIGNMENTS FOR 89V51RD2FN

        P00 = switch1 for channel 1

        P01 = switch2 for channel 2

        P02 = switch3 for channel 3

        P03 = switch4 for channel 4

        P04 = switch5 for coin input sensor (proximity switch)

        P05 = switch6 for start charging

        P10 = channel 1 red LED1 (ready system)

        P11 = channel 2 red LED2 (ready system2)

        P12 = channel 3 red LED3 (ready system3)

        P13 = channel 4 red LED4 (ready system4)

        P14 = channel 1 relay (start system1)

        P15 = channel 2 relay (start system2)

        P16 = channel 3 relay (start system3)

        P17 = channel 4 relay (start system4)

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 6

        LIST OF THE

        COMPONENTS

        List of the components

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        61 LIST OF THE COMPONETS

        RESISTORS

        CAPACITORS

        LIGHT EMITING DIODES (LEDS)- Green Red

        RELAYrsquoS-

        TRANSFORMERS

        RECTIFIER BRIDGES (W 10)

        OSCILLATOR

        SWITCHES- Push switches

        DARLINGTON PAIR IC (ULN2003a)

        SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

        SERIAL COMMUNICATION DRIVER IC (MAX 232)

        OPTOCOUPLER IC (4N33)

        MICROCONTROLLER IC (89V51 RD2)

        RELIMATE CONNECTOR- 2 pin amp 4 pin

        RS-232 PORT CONNECTOR

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 7

        INTRODUCTION

        OF COMPONENTS

        Working of components

        Features or Uses of components

        Testing of components

        71 RESISTOR

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        711 WORKING

        Resistors limit current Resistors are considered to be the most used and the most

        important component of all the electronic circuits Resistors resist the flow of electrical

        current The higher the value of resistance (measured in ohms)

        the lower the current will be

        712 TESTING

        Read the indicated color code value then select the OHM-scale within but not way

        below the indicated value A resistor is good if its resistance is close to the indicated

        Tolerance should be considered with the ohmmeter reading While no resistance reading at

        all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

        ohmmeter scale settings resistor is shorted

        713 SPECIFICATIONS

        To completely specify a resistors characteristics requires knowledge of the following

        parameters-

        bull Value

        bull Tolerance

        bull Temperature Coefficient

        bull Power Rating

        The specification of a resistor may be marked on its surface using either of two

        systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

        the second more recent system uses a combination of alpha-numeric characters

        7 2 CAPACITOR

        721 WORKING

        When DC voltage is applied to the capacitor an electric charge is stored on each

        electrode While the capacitor is charging up current flows The current will stop flowing

        when the capacitor has fully charged Capacitors find use

        in circuits for a variety of purposes They are used in

        time delay generation RC circuits In power supplies for filtering and power supply

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        decoupling as blocking capacitors for power factor correction and motor starting in LC

        tank circuits and so on

        722 TESTING

        To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

        negative probe to the capacitor positive terminal the positive probe to the negative terminal

        A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

        and moves back again to infinite resistance position A defective indication for an

        electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

        which is an indication that the capacitor is shorted

        73 LIGHT EMITING DIODE (LED)

        731 WORKING

        LEDs are special diodes that emit light when

        connected in a circuit They are frequently used as pilot lights in electronic appliances to

        indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

        the heart of an LED the semi-conductor chip

        In our project Green LED are used here for mainly two purpose

        a Charging ON indication (when ON)

        b Channel fault indication (always OFF)

        732 TESTING

        The good and working LED will then light up or glow a busted LED will not LEDs

        must have a resistor in series to limit the current to a safe value for quick testing purposes a

        1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

        directly connected to a battery or power supply It will be destroyed the LED

        733 FEATURES

        Single color

        High bright output

        Low power consumption

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        High reliability and long life

        734 Descriptions

        Dice material GaInN

        Emitting Color Super Bright White

        Device Outlineφ5mm Round Type

        Lens Type Water Clear

        74 RELAY

        741 WORKING

        A relay is an electrically operated switch Current

        flowing through the coil of the relay creates a magnetic field

        which attracts a lever and changes the switch contacts The coil

        current can be on or off so relays have two switch positions and

        most have double throw (changeover) switch contacts

        Relays are like remote control switches and are used in

        many applications because of their relative simplicity long life

        and proven high reliability

        742 USES

        The main operation of a relay comes in places where only a low-power signal can be

        used to control a circuit

        It is also used in places where only one signal can be used to control a lot of circuits

        The application of relays started during the invention of telephones They played an

        important role in switching calls in telephone exchanges They were also used in

        long distance telegraphy They were used to switch the signal coming from one

        source to another destination

        743 TESTING

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        A relay will usually have a coil pole terminal and a set of

        contacts The set of contacts that are open when the relay is not

        energized are called normally open (NO) contacts and the set of

        contacts that are closed when the relay is not energized are called

        normally closed (NC) contacts The following steps can be used to perform the testing of

        the relay using a multimeter

        Keep the multimeter in the continuity check mode

        Check for continuity between the NC contacts and pole

        Check for discontinuity between NO contacts and the pole

        Now energies the relay using the rated voltage For example use a 9V battery for

        energizing a 9V relay The relay will engage with clicking sound

        Now check for continuity between NO contacts and pole

        Also check for discontinuity between NC contacts and pole

        As a final test measure the resistance of the relay coil using a multimeter and check

        whether it is matching to the value stated by the manufacturer

        If all the above tests are positive we can conclude that the relay is healthy

        75 TRANSFORMER

        751 WORKING

        A transformer is a device that transfers electrical energy

        from one circuit to another through inductively coupled

        electrical conductors A changing current in the first circuit (the

        primary) creates a changing magnetic field

        This changing magnetic field induces a changing voltage in the second circuit (the

        secondary) This effect is called mutual induction

        If a load is connected to the secondary circuit electric charge will flow in the

        secondary winding of the transformer and transfer energy from the primary circuit to the

        load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

        of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

        number of primary turns

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        By appropriate selection of the numbers of turns a transformer thus allows an

        alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

        making it less

        752 TESTING

        1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

        scale and then adjusting the knob to verify its reading is an easy step to the

        reading of the ohm

        2 To check the resistance of the coil unplug or unsolder the leads of the

        transformer from its circuit and measure the resistance of each coil

        3 The next step is to test each coil for shorts to other coils

        76 RECTIFIER BRIDGE (W 10)

        761 WORKING

        A diode bridge rectifier is a device for converting AC or

        alternating current electricity into DC or direct current AC

        electricity goes from positive to negative constantly whereas DC

        always flows in the same direction

        AC electricity is more efficient to transmit and easier to

        convert into different voltages However most appliances need DC current to run A diode

        bridge rectifier is the most common type of power supply used to provide this current In

        our project W10 is a bridge rectifier which provides on single semiconductor chip

        77 OSCILLATOR

        771 Working

        An oscillator puts out an endless series of pulses The output

        constantly goes from 0 volts to Vcc and back to 0 volts again Almost

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        all digital circuits have some type of oscillator This stream of output pulses is often

        called a clock One of the most important features of any oscillator is its frequency stability

        or in other words its ability to provide a constant frequency output under varying load

        conditions Some of the factors that affect the frequency stability of an oscillator include

        temperature variations in the load and changes in the DC power supply Frequency stability

        of the output signal can be improved by the proper selection of the components used for the

        resonant feedback circuit including the amplifier but there is a limit to the stability that can

        be obtained from normal LC and RC tank circuits

        In our project instead of 12MHz crystal 110592MHz is used because it can be

        divided to give you exact clock rates for most of the common baud rates for the UART

        especially for the higher speeds (9600 19200) These crystals are readily available and

        commonly used

        78 SWITCH

        781 WORKING

        The most familiar form of switch is a manually operated

        electromechanical device with one or more sets of electrical contacts

        Each set of contacts can be in one of two states either closed meaning

        the contacts are touching and electricity can flow between them or

        open meaning the contacts are separated and the switch is non

        conducting The mechanism actuating the transition between these two

        states (open or closed) can be either a toggle (flip switch for continuous on or off) or

        momentary (push-for on or push-for off) type

        782 USES

        In electronics a switch is an electrical component that can break an electrical

        circuit interrupting the current or diverting it from one conductor to another

        783 TESTING

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        When the switch is ON it looks and acts like a wire When the switch is OFF there is

        no connection Switch can tested by using multimeter in continuity range

        79 DARLINGTON PAIR IC (ULN2003a)

        791 WORKING

        The Darlington transistor (often called a Darlington pair) is a

        compound structure consisting of two bipolar transistors (either

        integrated or separated devices) connected in such a way that the

        current amplified by the first transistor is amplified further by the

        second one This configuration gives a much higher current gain than

        each transistor taken separately and in the case of integrated devices

        can take less space than two individual transistors because they can

        use a shared collector

        Integrated Darlington pairs come packaged singly in

        transistor-like packages or as an array of devices (usually eight) in an integrated circuit

        The Darlington transistor array used is ULN2003 Applications include relay

        drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

        drivers and logic buffers Each input of this device has a zener diode and resistor in series

        to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

        for each Darlington pair for operation directly with TTL or 5-V CMOS devices

        792 FEATURES

        The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

        transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

        with common-cathode clamp diodes for switching inductive loads The collector-current

        rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

        higher current capability

        710 SERIES VOLTAGE REGULATER IC (78XX)

        7101 WORKING

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Voltage Regulator (regulator) usually having three legs converts varying input

        voltage and produces a constant regulated output voltage They are available in a variety of

        outputs

        The most common part numbers start with the numbers 78 or 79 and finish with two

        digits indicating the output voltage The number 78 represents positive voltage and 79

        negative one The 78XX series of voltage regulators are designed for positive input

        The LM78XX series typically has the ability to drive current up to 1A For

        application requirements up to 150mA 78LXX can be used As mentioned above the

        component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

        an output leg with the regulators voltage

        As a general rule the input voltage should be limited to 2 to 3 volts above the output

        voltage The LM78XX series can handle up to 36 volts input be advised that the power

        difference between the input and output appears as heat If the input voltage is unnecessarily

        high the regulator will overheat Unless sufficient heat dissipation is provided through heat

        sinking the regulator will shut down

        711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

        7111 WORKING

        The MAX-232 It includes a Charge Pump which generates

        +10V and -10V from a single 5v supply

        This IC also includes two receivers and two transmitters in

        the same package This is handy in many cases when we only want to

        use the Transmit and Receive data Lines We dont need to use two chips one for the

        receive line and one for the transmit There are also many variations of these devices The

        large value of capacitors are not only bulky but also expensive Therefore other devices are

        available which use smaller capacitors and even some with inbuilt capacitors However the

        MAX-232 is the most common and thus we will use this RS-232 Level Converter

        Dual Charge-Pump Voltage Converter

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

        V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

        output

        712 OPTOCOUPLER IC (4N33)

        7121 WORKING

        In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

        photoMOS) is a device that uses a short optical transmission path to transfer a signal

        between elements of a circuit typically a transmitter and a receiver while keeping them

        electrically isolated mdash since the signal goes from an electrical signal to an optical signal

        back to an electrical signal electrical contact along the path is broken

        Optocouplers typically come in a small 6-pin or 8-pin IC package but are

        essentially a combination of two distinct devices an optical transmitter typically a gallium

        arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

        light-triggered diac The two are separated by a transparent barrier which blocks any

        electrical current flow between the two but does allow the passage of light

        The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

        silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

        of isolation between driving and load circuits These Optocouplers can be used to replace

        reed and mercury relays with advantages of long life high speed switching and elimination

        of magnetic field

        713 MICROCONTROLLER IC (89V51 RD 2 )

        713 WORKING

        The P89V51RD2 is an 80C51 microcontroller with 64

        kB Flash and 1024 bytes of data RAM

        A key feature of the P89V51RD2 is its X2 mode option

        The design engineer can choose to run the application with the conventional 80C51 clock

        rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        achieve twice the throughput at the same clock frequency Another way to benefit from this

        feature is to keep the same performance by reducing the clock frequency by half thus

        dramatically reducing the EMI

        The Flash program memory supports both parallel programming and in serial In-

        System Programming (ISP) Parallel programming mode offers gang-programming at high

        speed reducing programming costs and time to market ISP allows a device to be

        reprogrammed in the end product under software control The capability to fieldupdate the

        application firmware makes a wide range of applications possible The P89V51RD2 is also

        In-Application Programmable (IAP) allowing the Flash program memory to be

        reconfigured even while the application is running

        714 RELIMATE CONNECTOR

        7141 WORKING

        These are wire to board type connectors used to facilitate

        proper and firm electrical connection between the relay card and

        microcontroller card

        The connector has following specifications

        No of Ways 2-20

        Voltage Rating 250V AC DC

        Current Rating 3A AC DC

        Contact Resistance 20mW max

        Insulation Resistance 1000MW min

        Dielectric Withstanding 1000V ACminute

        Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

        The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

        connector is it provides a fast and easy connection and disconnection it also avoids polarity

        conflicts

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        715 RS-232 PORT CONNECTOR

        7151 WORKING

        Almost all digital devices which we use require either TTL

        or CMOS logic levels Therefore the first step to connecting a

        device to the RS-232 port is to transform the RS-232 levels back

        into 0 and 5 Volts This is done by RS-232 Level Converters

        Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

        Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

        The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

        problem in many instances where only a single supply of +5V is present

        CHAPTER 8

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        IMPLIMENTATION

        OF THE PCB

        Components layout designing

        Developing or Etching the PCB

        Other operations like Drilling Cutting Tinning

        81 IMPLIMENTATION OF THE PCB

        A proper PCB ensure that various circuit components are interconnected as per the

        circuit diagram once they have been placed on the PCB in their proper positions and

        subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

        base material to which is permanently attached a flat metallic network of conducting path

        whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

        for this project is single one

        The basic material used may be resin coated paper fiber glass ceramic and the flat

        board configuration however is most widely used and it may be of the nature of the single

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

        which ensures adequate and permanent low resistance coupling

        811 BOARD DESIGN

        PCB designed is the most important and requires great care during work In this case

        great care must be taken while tracing the circuit or layout on the board Because once PCB

        is designed it is virtually impossible to alter it While designing a circuit designer should

        take care to avoid crossing of conducting path (tracks) as possible Crossover are

        unavoidable then only of the jumper can be used A circuit board carrying on both sides can

        also help to solve this problem when circuit is complicated

        812 THE MASTER DIAGRAM

        The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

        which is commonly made twice as the finished circuit since this makes the working on that

        much easier especially when circuit is complicated photography eventually reduces the

        size of diagram to that of the circuit before proceeding we must know some rules regarding

        the designing -

        a The space between the conductors must be strictly controlled to avoid the possibility

        of electrical discharges or unwanted capacitance The amount by which the mater

        diagram is to reduce in size is thus a critical deign feature

        b The conductor must be wider in those part of the circuits that are going to handle

        large current must be handle without undue temperature of conductors

        c The minimum width of copper should not generally be less than about 15mmThis

        is related to mechanical strength rather than electrical properties and it also ensure

        that strips remains securely bounded to the base material

        d The points where the component holes for component lead wire occurs must be sited

        to suit the dimensions of the component and dimensions between lead-out wire so

        that the components can be situated correctly on finished board The conductor is

        also main large at the point of holes

        813 PCB MAKING

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        When the mater diagram probable twice the size of real PCB has been evolved the

        test major step consists of etching or dissolving the unwanted metal from copper claded

        board to create a circuit as depicted by master diagram It must be stressed that very

        accurate checking master is essential at this stage Then the master point is mounted on a

        special frame on easy facing of a larger camera and with the aid of the very powerful

        illumination a master diagram is clearly photographed on a glass sensitive plate This is

        developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

        brought into operation This comprises the camera body mounted so that sideways after

        each exposure In this way number of copies of the original master diagram is set out

        exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

        In case of simple and need of number of less PCB economic and advisable to use the

        following lab method of PCB making

        Planning The Circuit

        It is not a particular difficult There are several important factors that need not be

        taken into account if the finished device is to work properly we must consider gain factor

        and ensure that the input and output parts are sufficiently well isolated to avoid the

        possibility We must also ensure that conductors and components carrying high frequency

        current are well separated from the part of the circuit We are also to make sure that all

        components need to return to earth are properly connected and that possibility of common

        impedance arising earth returned

        Circuit is totally eliminated by making all earth as substantial possible consistent

        with nature of design Other factors that have to successfully studied include availability of

        adequate return points on board and itrsquos mounting from accessibility of switch connection

        made for mechanical fixing ventilation effect of vibration

        Cleaning The Board

        The copper side of the board must be thoroughly cleaned before circuit plan is

        transferred to it This is important because even slightest trace of graze (from figure of

        instance) will impure the etching process and when the circuit plan has been neatly

        transferred to copper in this manner the board is held under running tap and the allowed to

        dry before resist is applied

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Transforming the Plan

        Now once cleaning is done plan has to transfer on copper surface of PCB material

        A convenient way to do this is simply put the carbon paper between a copper surface of the

        board and working plan and carefully trace the lines of original plan with a ball pen

        Resist

        Resist is nothing more than a substrate that is unaffected by presence etching

        chemicals It is usually colored so that it can be easily seen the copper surface when plan is

        clearly worked on clean copper that are to be left in fact as the copper conductor must be

        covered when resists the leaguer type of paints possess good resist properties but

        disadvantage of relatively long time taken for drying It is essential to resist through

        hardening before etching is started Nail polished are better as they quickly and are less

        difficult to remove

        To overcome this drying effect and to achieve the sharp edge of the trace on the

        PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

        short circulating due to paints are completely the avoid etching tapes and pads are available

        in different sizes

        Correcting Error

        When a result has been thoroughly hardened any errors that have been made can

        usually be corrected by gently scratching away with knife To ensure clear out lines round

        edges of copper conductors on board the resist must be applied with steady band

        Etching

        Next comes etching of unwanted copper amp whether a small single is all that is

        required as quantity of board to be produce certain precautions must be taken before

        operation is commenced the most used etch amp I ferrite chloride to this is added small

        quantity of HCL to accelerate But not critical as lab construction concerned A good

        etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

        grams of water

        Agitation

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

        the etchant process The depth of liquid must be sufficient to completely cover laminate the

        laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

        gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

        temperature and thickness of copper foil

        Finishing Off

        When all unwanted copper is dissolved from areas between conductor board should

        be taken from an etchant amp washed in water The resist must be removed using proper

        solvent After this the copper surface must be polished with any kind of cleaner It should be

        seen that there is no slight incomplete etching between the conducting parts of the PCB The

        PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

        This process is called Tinning This process of coating involve track with soldier

        Advantage of tinning the effect of environment of conductors then PCB is drilled

        ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

        Assembling On PCB

        After the holes are drilled the component have to be assembled on PCB before

        assembling the components it is necessary to clean soldering iron in order to get easy amp

        accurate soldering Removing impurity particles that are gathered on iron bit due to

        repetitive use cleans soldering iron

        CHAPTER 9

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        SOLDERING

        TECHNIQUE

        Technique for good soldering

        91 SOLDERING TECHNIQUE

        For soldering of any joints first the terminal to be soldered are cleaned to remove

        oxide film or dirt on it If required flux is applied on the points to be soldered

        Now the joint to be soldered is heated with the help of soldering iron Heat

        applied should be such that when solder wire is touched to joint it must melt

        quickly

        The joint and the soldering iron is held such that molten solder should flow

        smoothly over the joint

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        When joint is completely covered with molten solder the soldering iron is re-

        moved

        The joint is allowed to cool without any movement

        The bright shining solder indicates good soldering

        In case of dry solder joint a air gap remains in between the solder material and

        the joint It means that soldering is improper This is removed and again solder-

        ing is done

        Thus this way all the components are soldered on P C B

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 10

        PCB LAYOUTS

        Schematic diagram

        Bottom and top layout

        101 POWER SUPPLY CARD

        1011 SCHIMETIC DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1012 LEGEND MARKING

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

        Fig1011 Schematic diagram of power supply card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1013TOP LAYER

        1014 BOTTOM LAYER

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

        Fig1013 Top layer of power supply

        card

        Fig1014 Schematic diagram of power supply card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        102 BATTERY CHARGER CARD

        1021 SCHEMATIC DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

        Fig1021 Schematic diagram of battery charger card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        103 RELAY CARD

        1031 SCHIMETIC DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

        Fig1031 Schematic diagram of Relay card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1032 RELAY CARD LEGEND MARKING

        1033 TOP LAYER

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

        Fig1032 Legend marking of Relay card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1034 BOTTOM LAYER

        104 MICROCONTROLER CARD

        1041 SCHIMETIC DIAGRAM

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

        Fig1034 Bottom layer of Relay card

        Fig1041 Schematic diagram of microcontroller card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1042 ALL LAYERS

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

        Fig1042 All layer of microcontroller card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 11

        INTRODUCTION

        OF SOFTWARE

        Keil (microVision 2)

        Eagle (Easily Applicable Graphical Layout Editor)

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        111 Keil (microVision 2)

        1111 Introduction to C51 Cross Compiler

        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

        generate fast compact code for the 8051 microcontroller family The C51 Compiler

        generates object code that matches the efficiency and speed of assembly programming

        Using a high-level language like C has many advantages over assembly language

        programming

        Knowledge of the processor instruction set is not required Rudimentary knowledge of

        the memory structure of the 8051 CPU is desirable (but not necessary)

        Details like register allocation and addressing of the various memory types and data

        types is managed by the compiler

        Programs get a formal structure (which is imposed by the C programming language) and

        can be divided into separate functions This contributes to source code reusability as

        well as better overall application structure

        The ability to combine variable selection with specific operations improves program

        readability

        Keywords and operational functions that more nearly resemble the human thought

        process may be used

        Programming and program test time is drastically reduced

        The C run-time library contains many standard routines such as formatted output

        numeric conversions and floating-point arithmetic

        Existing program parts can be more easily included into new programs because of

        modular program construction techniques

        The language C is a very portable language (based on the ANSI standard) that enjoys

        wide popular support and is easily obtained for most systems Existing program

        investments can be quickly adapted to other processors as needed

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1112 Software Development Cycle in Keil

        When we use the Keil Software tools the

        project development cycle is roughly the same as

        it is for any other software development project

        1 Create a project select the target chip from the

        device database and configure the tool settings

        2 Create source files in C or assembly

        3 Build your application with the project

        manager

        4 Correct errors in source files

        5 Test the linked application A block diagram of

        the complete 8051 tool set may best illustrate the

        development cycle

        112 Eagle (Easily Applicable Graphical Layout Editor)

        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

        printed circuit boards (PCBs) It is a complete platform for the development of any type of

        complicated amp sophisticated multilayered PCBs This software consist of the following tool

        1121 Schematic Editor

        In this one can develop amp design circuits for the required PCB

        1122 Layout Editor

        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

        Fig 111 Software development in KEIL

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1123 Library Editor

        This is very useful in case of customized component design that does not occur in the predefined library according to our need

        1124 Auto Router

        This is an artificial intelligence based tool or subroutine that can do auto routing of

        the PCB tracks designed

        1125 Cam Processor

        This is used to finally print the various layers of the designed PCB viz Top Layer

        Bottom Layer Component Layer Masking Layer etc

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

        Start

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 12

        INTRODUCTION

        OF

        PROGRAMMING

        Flowchart of programming

        Program code

        121 Flowchart

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

        2

        flag9==1

        flag9=1

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

        flag11==1

        flag11=1 flag11=0 flag4=0

        REady_LED4=0

        Sw2_op (P01) ==0

        My delay (10)

        3 3

        flag2=1 disp2=1 k2=0

        3

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

        4

        flag11==1

        flag11=0 flag4=0 REady_LED4=0

        flag11=1

        My delay (10)

        flag3=1 disp3=1 k3=0

        k1==0||k2==0||k4==0

        Sw3_op (P02) ==0

        5

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

        flag5==1

        5

        flag11==1

        flag7=1

        flag7==1

        flag7=0 flag2=0 REady_LED2=0

        6

        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

        flag11=0 flag4=0 REady_LED4=0

        flag11=1

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

        6

        My delay (10)

        flag4=1 disp4=1 k4=0

        k1==0||k2==0||k3==0 flag5==1

        7

        Sw4_op (P03) ==0

        flag5=1 flag5=0 flag1=0 REady_LED1=0

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

        7

        flag7==1

        flag9==1

        flag7=1

        flag7=0 flag2=0 REady_LED2=0

        flag9=0 flag3=0 REady_LED3=0

        flag9=1

        Sw5_op A(P04) ==0

        My delay (10)

        8

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

        9

        flag2==1

        flag3==1

        8

        flag1==1

        flag4==1 flag5=1 disp5=1

        flag9=1 disp5=1

        flag7=1 disp5=1

        flag11=1 disp5=1

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

        Sw6_op (P05) ==0

        My delay (10)

        flag2==1 ampamp flag7==1

        flag3==1 ampamp flag9==1 9

        flag1==1 ampamp flag5==1 flag6=1 disp6=1

        flag8=1 disp6=1

        10

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

        10

        flag4==1 ampamp flag11==1

        flag10=1 disp6=1

        flag12=1 disp6=1

        flag8==1

        flag10==1

        11

        flag6==1

        i++

        l++

        j++

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

        flag12==1

        M++

        11

        Stop

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        122 Program

        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

        define buzzerP2_0 buzzer indication

        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

        sbit sw5_op=P0^4 input switch5 for coin

        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

        output Led for indication

        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

        function prototype declaration

        void my_delay(unsigned int value) DELAY FUCTION

        void init_timer() timer 0 initialization function

        variable declaration

        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        start of main programme

        void main()

        init_timer() call it timer initialization function

        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

        start of while loop

        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

        condition for switch1

        if(flag1==1) check swich1 pressed if(disp1==1 )

        REady_LED1=1 turn on Ready indication of led 1 disp1=0

        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

        if(iltk) loop will repeat for desired time of charging

        if(igt=1000)

        buzzer=1 turn on buzzer if (ii==20)

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        REady_LED1=1 turn on ready indication of led1

        else if(ii==40)

        REady_LED1=0ii=0

        elseREady_LED1=0

        START_LED1=1

        else

        START_LED1=0

        k1=1 buzzer=0

        REady_LED1=0 flag1=0

        flag5=0flag6=0

        condition for switch2

        if(flag2==1) check swich2 pressed if(disp2==1)

        REady_LED2=1 turn on ready 2 led indication

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        disp2=0

        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

        if(jltk)

        if(jgt1000) buzzer=1 if(jj==20)

        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

        elseREady_LED2=0

        START_LED2=1

        else START_LED2=0

        REady_LED2=0 k2=1 buzzer=0

        flag2=0flag7=0flag8=0

        j=0jj=0

        condition for switch 3

        if(flag3==1) check swich3 pressed

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        if(disp3==1 )

        REady_LED3=1 disp3=0

        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

        if(lltk)

        if(lgt1000) buzzer=1 if(ll==20)

        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

        elseREady_LED3=0

        START_LED3=1

        else START_LED3=0

        LED2=0 k3=1 buzzer=0

        REady_LED3=0 flag3=0

        flag9=0flag10=0

        l=0ll=0

        condition for switch 4

        if(flag4==1) check swich4 pressed if(disp4==1 )

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        REady_LED4=1 disp4=0

        if(flag11==1) check coin is pressed

        if(flag12==1) START is pressed

        if(mltk)

        if(mgt1000)

        buzzer=1 if(mm==20)

        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

        elseREady_LED4=0

        START_LED4=1

        else START_LED4=0

        buzzer=0 k4=1

        REady_LED4=0 flag4=0

        flag11=0flag12=0

        m=0mm=0

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        while(1)

        end of main programme

        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

        whenever specific time the interrupt will generate control will go in following function

        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if(sw1_op==0 ) ready switch flag for system1

        my_delay(10) CALL DELAY FUNCTION

        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

        if(flag7==1) SET THE FLAG

        flag7=1

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

        flag9=1

        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

        flag11=1

        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if(sw2_op==0 ) fready switch flag for system2

        my_delay (10)

        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

        if(flag5==1)

        flag5=1

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

        flag9=1

        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

        flag11=1

        elseflag11=0flag4=0REady_LED4=0

        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

        if(flag7==1)

        flag7=1

        else

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        flag7=0flag2=0REady_LED2=0 if(flag5==1)

        flag5=1

        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

        flag11=1

        elseflag11=0flag4=0REady_LED4=0

        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

        if(flag7==1)

        flag7=1

        elseflag7=0

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        flag2=0REady_LED2=0 if(flag5==1)

        flag5=1

        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

        flag9=1

        elseflag9=0flag3=0REady_LED3=0

        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        disp5=1 if(flag4==1 ) flag11=1 disp5=1

        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

        if(flag6==1)

        i++ if (igt1000) ii++

        if (flag8==1)

        j++ if(jgt1000) jj++

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        if (flag10==1)

        l++ if (lgt1000) ll++

        if (flag12==1)

        m++ if (mgt1000) mm++

        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 13

        TROUBLE SHOOT

        Troubleshoot

        131 TROUBLE SHOOT

        A newly assembled circuit does not work may be due to -

        Faulty components

        Improper soldering

        Wrong connections

        Also any stop in working after some period may be due to -

        Component failure

        Supply failure

        Damaging of PCB

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Fault finding is very essential if you want the circuit to operate properly

        If a newly assembled circuit is not working properly check all the components and

        circuit connections according to the diagram The circuit may not be working due to wrong

        polarity of capacitor diode and wrong supply terminal connection Most of the times the

        circuit does not work due to bad soldering Therefore proper procedure is followed to have

        proper soldering

        If faults are not observed during physical observations one should proceed for Hot

        test ie Voltage measurement at different points for example at Input terminal etc

        Resistance measurement is also done which is known as Dry test

        During this project work some green LEDs was not glow then we checked it

        continuity and replace it

        Also relay was not properly worked therefore we replaced it Some ICs was get

        heated after starting the project It happens because of some soldering points are shorted

        during soldering PCB We solved that problem

        CHAPTER 14

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        ADVANTAGES OF

        THE PROJECT

        Advantages

        141 ADVANTAGES OF THE PROJECT

        Simple and hand efficient Microcontroller based system

        Fast charging capacity

        Simple to operate

        Ease of mobility

        Facilitates connectivity for 90 of cellular phones

        Less expensive

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Reduced man power

        Low power consumption

        It can offer emergency charging for 4sets of handsets synchronously

        CHAPTER 15

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        DISADVANTAGES

        OF THE PROJECT

        Disadvantages

        151 DISADVANTAGES OF THE PROJECT

        It requires mains supply to work project

        Due to limited charging channels till now there may be a possibility that

        mobile phones of few brands cannot be connected for charging For this

        purpose we have to use separate connectors for that specific brand differently

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

        min

        It does not have battery backup therefore it cannot be portable

        CHAPTER 16

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        APPLICATIONS OF

        THE PROJECT

        Application

        161 APPLICATIONS OF THE PROJECT

        The coin based mobile phone charger is very useful to public for using coin to

        charge for the mobile phone in any places

        It is used for emergency charging purposes

        It can be installed in malls railway stations bus stops and other public

        places

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        The charger offers a unique revenue opportunity for a vast range of

        businesses - from airports to pubs from universities to health clubs virtually

        any location where there is a high footfall creating a large number of

        potential users

        It can be installed in offices and collages for pay charging facility

        CHAPTER 17

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        FUTURE

        DEVELOPMENT OF

        THE PROJECT

        FUTURE DEVELOPMENT OF THE PROJECT

        171 FUTURE DEVELOPMENTOFTHE PROJECT

        This project is very useful to people who are using mobile phone without charging

        condition in public places

        It will use with a stereo advertisement carrier that can display video advertisement

        It will provide battery backup for make it portable

        It will also provide SMS system in future

        We can also increase the charging time by editing software of the project

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 18

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        COST ANALYSIS

        OF THE PROJECT

        COST ANALYSIS OF THE PROJECT

        181 COST ANALYSIS OF THE PROJECT

        1811 Component list for power supply card

        Footprint Quantity Designators Rate

        Resistor

        22K 1 R2 1

        1K 1 R1 1

        Capacitor

        1000uf25V 1 C5 10

        2200uf25V 1 C1 10

        022uf 2 C6 C2 1

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

        Table 1811 Component list for power supply card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        01uf 2 C4 C3 1

        IC

        BRIDGE W10 2 BR2 BR1 10

        L7812CV (TO-220) 1 U2 8

        L7805CV (TO-220) 1 U1 8

        Connector

        CON PHO 2PIN 2 J3 J2 16

        CON PHO 3PIN 1 J1 12

        LED3mm red 2 L1 L2 15

        Heat sink (TO-220) 2 16

        Total 955

        1812 Component list for battery charger card

        Footprint Quantity Rate

        Capacitor

        2200uf25V 1 1000

        022uf 4 100

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        01uf 4 100

        IC

        BRIDGE W10 1 500

        L7805CV (TO-220) 4 3200

        Connector

        CON PHO 2PIN 1 800

        Relimate 2 pin 1 400

        relimate 3 pin 4 2000

        Heat sink (TO-220) 4 1200

        TOTAL 9300

        1813 Component list for Relay card

        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

        Table 1812Component list for battery charger card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        RELIM-4 1 J1 700 16 pin ic socket 1 400

        Total 18900

        1814Component list for controller card

        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

        Table 1813Component list for relay card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

        total 27000

        1815 Miscellaneous material

        Material Quantity Rate

        electronic item

        Transformer

        TXR1 0-9-15 1 20000

        0-9 1A

        0-15 100mA

        TXR2 0-9 1 16500

        0-9 1A

        Proximity switch 1 20000

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

        Table 1814Component list for microcontroller card

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Red push bottom 4 4000

        Green push button 1 1000

        Red led 5mm 4 800

        Green led 5mm 4 800

        Led holder 8 1600

        Copper clad 2 4000

        3 core cable 1 meter 1500

        3 pin plug 1 3000

        2 pin relimate wire 19 9000

        3 pin relimate wire 5 3750

        4 pin relimate wire 2 2000

        mechanical items

        Enclosure 1 25000

        Acrylic sheet 2 X 1 30000

        12mm cable gland 1 1000

        Screw 3mm 33 2000

        Screw 35mm 6 2400

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        10 mm spacers 100 1500

        10mm insert to stud 50 10000

        cable tie 2500

        Total 162350

        CHAPTER 19

        APPENDIX

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

        Table 1815Component list for miscellaneous material

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        APPENDIX

        191 APPENDIX

        1911 78xx IC datasheet

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1912 W10 datasheet

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1913 4n33 IC datasheet

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

        1914 MAX 232

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1915 ULN2003a IC datasheet

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        1916 89V51RD2 IC datasheet

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 20

        CONCLUSION

        CONCLUSION

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        201 CONCLUSION

        The coin-operated mobile phone charger is already successfully installed in

        hundreds of locations worldwide providing a unique service to the public and a source of

        revenue for site providers The coin-operated mobile charger can be quickly and easily

        installed in any business premises

        The charger offers a unique revenue opportunity for a vast range of businesses ndash

        from airports to pubs from universities to health clubs virtually any location where there is

        a high footfall creating a large number of potential users

        The charger can charge up to 4 different mobile phones simultaneously It will

        extend low mobile phone talk time provide battery charging

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 21

        IMAGES OF THE

        PROJECT

        Images of the project

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        211 IMAGES OF THE PROJECT

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

        fig211 lsquoCoin operated mobile battery charger

        Fig212 Circuit arrangement of coin operated mobile battery charger

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Fig 216 Relay driver circuit

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

        Fig 213 Constant voltage battery charger circuit

        Fig214 Power supply circuit

        Fig215 Metal detector proximity switch

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Fig217 Microcontroller circuit

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        Fig228 coin operated mobile battery charger project presentation

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        CHAPTER 22

        BIBILOGRAPHY

        BIBLIOGRAPHY

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

        221 BIBLIOGRAPHY

        BOOKS

        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

        INTERNET LINKS

        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

        • CHAPTER 1

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Then he has to press select switch in order to make channel ready for charging the

          selected channel will be indicated by a red LED

          The channel will remain in selected mode for 30 sec Hence within 30 sec the user

          has to first insert the predefined rupee coin and then has to press START switch which will

          finally start the charging process for a predefined time and is indicated by a green LED

          If failing to do so within 1 min will reset the channel and the user has to again

          follow the same procedure

          Any other channel selection is not considered within 30 sec of previous channel if

          selected or until it has entered in to charging mode

          Completion of charging will be indicated by an OFF green LED

          23 Technology Used

          Coin recognition using proximity switch(metal detector)

          Constant voltage charger

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 5

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 3

          DEVELOPMENT

          STAGES amp

          PROCESS

          Development stages and process of the project

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 6

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          31 DEVELOPMENT STAGES amp PROCESS

          The complete development of this project can be divided into the following stages

          Problem definition stage

          Designing block diagram

          Implementing circuits and components

          Developing algorithm for software

          Writing actual code for Microcontroller

          Compiling the code

          Burning the hex file into microcontroller with programmer

          Testing and Running

          311 Problem definition stage

          This is the very first stage to develop any project It actually defines the aim

          and the concept of the project At inconvenient times when access to a standard

          charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

          designed to solve this problem The charger operates like a vending machine all a

          user has to do is plug the mobile phone into one of the four adapters and insert a

          coin the phone will then be given a micro-pulse fast charge in just 10 minutes

          312 Designing block diagram

          At this stage we have categorized the whole system into different individual

          modules These modules (block diagrams) will be helpful in understanding the

          concept and working of the integrated system It also simplifies the entire debugging

          and testing process

          313 Implementing circuits and components

          This is the actual implementation of circuit of each block At this stage we

          have actually designed each block separately and finally integrated them into the

          complete working system

          314 Developing for software

          To get the logical flow of the software the development of algorithm having

          a prominent role So that we have to analyze the complete system and organized the

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          algorithm in such a manner that one can understand the complete working of the

          software

          315 Writing actual code for Microcontroller

          After the development of the algorithm and flowchart we have actually

          translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

          that it can understand the instructions and run as per our requirement The

          instructions are in ANSII C Language

          316 Compiling the code

          The hand written code on paper was then transferred into computer For that

          we have used Keil pre-install on PC The Keil is a Computer Aided Program to

          simulate the working of Microcontroller in real time without burning the software

          into actual IC We simulated and compiled our program for error checking After

          removing several compiling errors the program was converted into machine language

          ie Philips hex format

          317 Burning the hex file into microcontroller with Programmer

          In this stage the compiled hex format file was downloaded or burned into

          flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

          system programming software provided by the manufacturer itself

          318 Testing and Running

          This time we tested our project for actual working after loading the Software

          into the microcontroller Any errors found were removed successfully This is the last

          and final stage of development of our project

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 4

          BLOCK DIAGRAM

          OF THE PROJECT

          Block Diagram Brief Explanation

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          41 Block Diagram

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

          Fig 41 Block diagram of the project

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          42 Brief Explanation

          421 POWER SUPPLY

          Power supply is used to deliver power to the circuit It delivers +5Vdc to

          microcontroller and other peripherals and +12Vdc delivers power to relay

          422 COIN INPUT AND LEVEL CONVERTOR

          Coin input is a sensor which senses a metal and produces an output voltage This

          voltage is high as compared to the input required for microcontroller

          Hence a level shifter is used to bring down the voltage level which could be

          readable to microcontroller

          423 START SWITCH

          Start switch is used to start the charging process of a

          mobile phone

          424 RS232 INTERFACING TO PC

          RS 232 is a protocol used for communication between

          computer and microcontroller It is also used for

          programming the microcontroller in its ISP (in system

          programming) mode

          425 CHANNEL READY INDICATOR

          It provides visual indication for the channel which is in

          charging mode

          426 DARLINGTON PAIR ARRAY

          Darlington pair array is used as a relay driver

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          427 CHANNEL IN CHARGE INDICATION

          It provides visual indication for the channel which is in

          charging mode

          428 RELAY ARRAY

          Relay array consists of relays for each channel to

          provide electromechanical switching in between charger and

          mobile phone

          429 CHARGER ARRAY

          Charger array is used to provide charging power to the

          mobile phones through the electromechanical switches

          4210 CELL PHONE TO CHARGE

          Channel select switch is used for selecting a channel on

          which the mobile phone is to be charged

          4211 MICROCONTROLLER

          Microcontroller is used to control the whole operation of

          the device Microcontroller reads input signal from input

          device and triggers the output device According to the

          conditions defined in the microcontroller by the programmer

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 5

          CIRCUIT

          DIAGRAM

          EXPLANATION

          Circuit diagram

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Circuit diagram explanation Working

          51 POWER SUPPLY CIRCUIT

          511 CIRCUIT DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

          Fig51 Circuit diagram of the power supply

          Bridge RectifierTRANSFORMER

          Filter Voltage regulator Load

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          512 WORKING

          Transformer

          A step-down transformer is used to achieve our requirements of the power

          supply It steps down high voltage ac mains to low voltage ac mains

          Bridge Rectifier

          A bridge rectifier makes use four diodes in a bridge arrangement to achieve

          full wave rectification This is a widely used configuration both with individual

          diodes wired and with single component bridges where the diode bridge is wired

          internally It also converts ac to dc but the dc output is varying

          One advantage of a bridge rectifier over a conventional full-wave rectifier is

          that with a given transformer the bridge rectifier produces a voltage output that is

          nearly twice that of the conventional full-wave circuit

          Filter

          The output of the rectifier is a pulsating dc wave We need a constant dc

          output To do this we need to filter out the oscillation from the pulsating dc wave

          This is obtained with a diode capacitor combination

          Voltage Regulator

          A voltage regulator is used for voltage regulation in the circuit This provides

          a protection to the circuits in the case of fluctuations It eliminates ripples by setting

          dc output to fixed voltages

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

          Fig 52 Block diagram of the power supply

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Load

          The load can be anything which wants to switch ON by using power supply

          513 CIRCUIT DIAGRAM EXPLANATION

          Regulated power supplies are commonly used in engineering projects Power

          supply is food of any circuit

          +5V SUPPLY UNIT

          +5V supply is obtained from the +5V supply unit for microcontroller and

          digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

          transformer having a capacity of 500mA

          Since the input voltage to the regulator IC should be more than its output

          voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

          of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

          smooth DC supply The rating of the chosen capacitor filter is 1000microF

          The regulated DC voltage is obtained by using a regulator IC 7805 In the

          case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

          Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

          output of regulator IC to eliminate the voltage oscillations at the output due to the large

          voltage oscillations at the input of the regulator

          +12V SUPPLY UNIT

          The plusmn12 V supply required by the relay is provided by the 12V supply circuit

          arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

          step down transformer having a capacity of 1A and the center tap of the transformer is

          grounded This low voltage is rectified with the help off bridge rectifier

          Since the input voltage to the regulator IC should be more than its output

          voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

          the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

          filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

          For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

          7912 is used

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

          the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

          connected at the output as shown in figure to eliminate the voltage oscillations at the

          output due to the large voltage oscillations at the input of the regulator

          52 CONSTANT VOLTAGE CHARGER

          521 CIRCUIT DIAGRAM

          Fig 53 Circuit diagram of the battery charger

          522 CIRCUIT DIAGRAM EXPLANATION

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Constant-voltage (often called constant-potential) chargers maintain nearly the same

          voltage input to the battery throughout the charging process regardless of the batterys state

          of charge Constant-voltage chargers provide a high initial current to the battery because of

          the greater potential difference between the battery and charger

          A constant-voltage charger may return as much as 70 of the previous discharge in

          the first 30 minutes This proves useful in many battery applications involving multiple

          discharge scenarios As the battery charges its voltage increases quickly This reduces the

          potential that has been driving the current with a corresponding rapid decrease in charge

          current as depicted in the illustration below As a result even though the battery reaches

          partial charge quickly obtaining a full charge requires prolonged charging

          Given this behavior constant-voltage chargers are frequently found in applications

          that normally allow extended charging periods to attain full charge Constant-voltage

          chargers should not be used where there is frequent cycling of the battery Repeated

          discharges without returning the cell to its full charge will eventually decrease the battery

          capacity and may damage individual cells

          Fig 54An Illustration graph of the charging function of constant battery charger

          Constant-voltage chargers are most often used in two very different modes as a fast

          charger to restore a high percentage of charge in a short time or as a float charger to

          minimize the effects of overcharge on batteries having infrequent discharges

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          53 RELAY DRIVER CIRCUIT

          531 CIRCUIT DIAGRAM

          532 CIRCUIT DIAGRAM EXPLANATION

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

          Fig 55 Relay driver circuit

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Input from the controller is connected to the relay card through connector J1 which

          carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

          pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

          These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

          relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

          series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

          and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

          relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

          NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

          3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

          RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

          is used to connect power supply to relay card

          533 WORKING

          While taking Relay1 (RL1) into consideration we will discuss the working of relay

          card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

          of the IC are in cut off region which causes an open circuit so there is no current flow

          flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

          applied to the two pin1 of IC U1 the internal transistor goes in to active region and

          completes the path ie provide ground to the relay coil so the current flows through the

          LED activating the relay

          As the current flows through the relay coil it gets energized and switch over the

          contacts ie common and normally open contact get connected and provide a path to flow

          current from J11 ie charger into the load connected at J4 hence the cell phone charging

          process starts The same above process is applies for all relays If LED is fused or

          damaged the path will be open and relay will not be energized and if relay is damaged the

          led will not be illuminated So the LED here is used as a FAULT indicator and a

          CHARGING ON indicator

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          54 MICROCONTORLLER CIRCUIT

          541 CIRCUIT DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          542 CIRCUIT DIAGRAM EXPLANATION

          CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

          the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

          port P04 through J4 and START switch is connected to port P05 through SW5

          Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

          P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

          Output for relay card is taken on port P14 to P17

          Components C1 R1 and push button S1 forms reset circuit which provides a power

          on reset for the micro controller and even provide manual reset Crystal XL1 is a

          110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

          22pf capacitor used as loading capacitor for crystal

          Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

          RN2 resistance network

          IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

          the proximity switch and microcontroller and convert its output readable to microcontroller

          IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

          communication between PC and a microcontroller through connector J3

          Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

          communication process

          Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

          power supply connection

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          543 PORT ASSIGNMENTS FOR 89V51RD2FN

          P00 = switch1 for channel 1

          P01 = switch2 for channel 2

          P02 = switch3 for channel 3

          P03 = switch4 for channel 4

          P04 = switch5 for coin input sensor (proximity switch)

          P05 = switch6 for start charging

          P10 = channel 1 red LED1 (ready system)

          P11 = channel 2 red LED2 (ready system2)

          P12 = channel 3 red LED3 (ready system3)

          P13 = channel 4 red LED4 (ready system4)

          P14 = channel 1 relay (start system1)

          P15 = channel 2 relay (start system2)

          P16 = channel 3 relay (start system3)

          P17 = channel 4 relay (start system4)

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 6

          LIST OF THE

          COMPONENTS

          List of the components

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          61 LIST OF THE COMPONETS

          RESISTORS

          CAPACITORS

          LIGHT EMITING DIODES (LEDS)- Green Red

          RELAYrsquoS-

          TRANSFORMERS

          RECTIFIER BRIDGES (W 10)

          OSCILLATOR

          SWITCHES- Push switches

          DARLINGTON PAIR IC (ULN2003a)

          SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

          SERIAL COMMUNICATION DRIVER IC (MAX 232)

          OPTOCOUPLER IC (4N33)

          MICROCONTROLLER IC (89V51 RD2)

          RELIMATE CONNECTOR- 2 pin amp 4 pin

          RS-232 PORT CONNECTOR

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 7

          INTRODUCTION

          OF COMPONENTS

          Working of components

          Features or Uses of components

          Testing of components

          71 RESISTOR

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          711 WORKING

          Resistors limit current Resistors are considered to be the most used and the most

          important component of all the electronic circuits Resistors resist the flow of electrical

          current The higher the value of resistance (measured in ohms)

          the lower the current will be

          712 TESTING

          Read the indicated color code value then select the OHM-scale within but not way

          below the indicated value A resistor is good if its resistance is close to the indicated

          Tolerance should be considered with the ohmmeter reading While no resistance reading at

          all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

          ohmmeter scale settings resistor is shorted

          713 SPECIFICATIONS

          To completely specify a resistors characteristics requires knowledge of the following

          parameters-

          bull Value

          bull Tolerance

          bull Temperature Coefficient

          bull Power Rating

          The specification of a resistor may be marked on its surface using either of two

          systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

          the second more recent system uses a combination of alpha-numeric characters

          7 2 CAPACITOR

          721 WORKING

          When DC voltage is applied to the capacitor an electric charge is stored on each

          electrode While the capacitor is charging up current flows The current will stop flowing

          when the capacitor has fully charged Capacitors find use

          in circuits for a variety of purposes They are used in

          time delay generation RC circuits In power supplies for filtering and power supply

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          decoupling as blocking capacitors for power factor correction and motor starting in LC

          tank circuits and so on

          722 TESTING

          To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

          negative probe to the capacitor positive terminal the positive probe to the negative terminal

          A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

          and moves back again to infinite resistance position A defective indication for an

          electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

          which is an indication that the capacitor is shorted

          73 LIGHT EMITING DIODE (LED)

          731 WORKING

          LEDs are special diodes that emit light when

          connected in a circuit They are frequently used as pilot lights in electronic appliances to

          indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

          the heart of an LED the semi-conductor chip

          In our project Green LED are used here for mainly two purpose

          a Charging ON indication (when ON)

          b Channel fault indication (always OFF)

          732 TESTING

          The good and working LED will then light up or glow a busted LED will not LEDs

          must have a resistor in series to limit the current to a safe value for quick testing purposes a

          1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

          directly connected to a battery or power supply It will be destroyed the LED

          733 FEATURES

          Single color

          High bright output

          Low power consumption

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          High reliability and long life

          734 Descriptions

          Dice material GaInN

          Emitting Color Super Bright White

          Device Outlineφ5mm Round Type

          Lens Type Water Clear

          74 RELAY

          741 WORKING

          A relay is an electrically operated switch Current

          flowing through the coil of the relay creates a magnetic field

          which attracts a lever and changes the switch contacts The coil

          current can be on or off so relays have two switch positions and

          most have double throw (changeover) switch contacts

          Relays are like remote control switches and are used in

          many applications because of their relative simplicity long life

          and proven high reliability

          742 USES

          The main operation of a relay comes in places where only a low-power signal can be

          used to control a circuit

          It is also used in places where only one signal can be used to control a lot of circuits

          The application of relays started during the invention of telephones They played an

          important role in switching calls in telephone exchanges They were also used in

          long distance telegraphy They were used to switch the signal coming from one

          source to another destination

          743 TESTING

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          A relay will usually have a coil pole terminal and a set of

          contacts The set of contacts that are open when the relay is not

          energized are called normally open (NO) contacts and the set of

          contacts that are closed when the relay is not energized are called

          normally closed (NC) contacts The following steps can be used to perform the testing of

          the relay using a multimeter

          Keep the multimeter in the continuity check mode

          Check for continuity between the NC contacts and pole

          Check for discontinuity between NO contacts and the pole

          Now energies the relay using the rated voltage For example use a 9V battery for

          energizing a 9V relay The relay will engage with clicking sound

          Now check for continuity between NO contacts and pole

          Also check for discontinuity between NC contacts and pole

          As a final test measure the resistance of the relay coil using a multimeter and check

          whether it is matching to the value stated by the manufacturer

          If all the above tests are positive we can conclude that the relay is healthy

          75 TRANSFORMER

          751 WORKING

          A transformer is a device that transfers electrical energy

          from one circuit to another through inductively coupled

          electrical conductors A changing current in the first circuit (the

          primary) creates a changing magnetic field

          This changing magnetic field induces a changing voltage in the second circuit (the

          secondary) This effect is called mutual induction

          If a load is connected to the secondary circuit electric charge will flow in the

          secondary winding of the transformer and transfer energy from the primary circuit to the

          load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

          of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

          number of primary turns

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          By appropriate selection of the numbers of turns a transformer thus allows an

          alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

          making it less

          752 TESTING

          1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

          scale and then adjusting the knob to verify its reading is an easy step to the

          reading of the ohm

          2 To check the resistance of the coil unplug or unsolder the leads of the

          transformer from its circuit and measure the resistance of each coil

          3 The next step is to test each coil for shorts to other coils

          76 RECTIFIER BRIDGE (W 10)

          761 WORKING

          A diode bridge rectifier is a device for converting AC or

          alternating current electricity into DC or direct current AC

          electricity goes from positive to negative constantly whereas DC

          always flows in the same direction

          AC electricity is more efficient to transmit and easier to

          convert into different voltages However most appliances need DC current to run A diode

          bridge rectifier is the most common type of power supply used to provide this current In

          our project W10 is a bridge rectifier which provides on single semiconductor chip

          77 OSCILLATOR

          771 Working

          An oscillator puts out an endless series of pulses The output

          constantly goes from 0 volts to Vcc and back to 0 volts again Almost

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          all digital circuits have some type of oscillator This stream of output pulses is often

          called a clock One of the most important features of any oscillator is its frequency stability

          or in other words its ability to provide a constant frequency output under varying load

          conditions Some of the factors that affect the frequency stability of an oscillator include

          temperature variations in the load and changes in the DC power supply Frequency stability

          of the output signal can be improved by the proper selection of the components used for the

          resonant feedback circuit including the amplifier but there is a limit to the stability that can

          be obtained from normal LC and RC tank circuits

          In our project instead of 12MHz crystal 110592MHz is used because it can be

          divided to give you exact clock rates for most of the common baud rates for the UART

          especially for the higher speeds (9600 19200) These crystals are readily available and

          commonly used

          78 SWITCH

          781 WORKING

          The most familiar form of switch is a manually operated

          electromechanical device with one or more sets of electrical contacts

          Each set of contacts can be in one of two states either closed meaning

          the contacts are touching and electricity can flow between them or

          open meaning the contacts are separated and the switch is non

          conducting The mechanism actuating the transition between these two

          states (open or closed) can be either a toggle (flip switch for continuous on or off) or

          momentary (push-for on or push-for off) type

          782 USES

          In electronics a switch is an electrical component that can break an electrical

          circuit interrupting the current or diverting it from one conductor to another

          783 TESTING

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          When the switch is ON it looks and acts like a wire When the switch is OFF there is

          no connection Switch can tested by using multimeter in continuity range

          79 DARLINGTON PAIR IC (ULN2003a)

          791 WORKING

          The Darlington transistor (often called a Darlington pair) is a

          compound structure consisting of two bipolar transistors (either

          integrated or separated devices) connected in such a way that the

          current amplified by the first transistor is amplified further by the

          second one This configuration gives a much higher current gain than

          each transistor taken separately and in the case of integrated devices

          can take less space than two individual transistors because they can

          use a shared collector

          Integrated Darlington pairs come packaged singly in

          transistor-like packages or as an array of devices (usually eight) in an integrated circuit

          The Darlington transistor array used is ULN2003 Applications include relay

          drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

          drivers and logic buffers Each input of this device has a zener diode and resistor in series

          to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

          for each Darlington pair for operation directly with TTL or 5-V CMOS devices

          792 FEATURES

          The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

          transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

          with common-cathode clamp diodes for switching inductive loads The collector-current

          rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

          higher current capability

          710 SERIES VOLTAGE REGULATER IC (78XX)

          7101 WORKING

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Voltage Regulator (regulator) usually having three legs converts varying input

          voltage and produces a constant regulated output voltage They are available in a variety of

          outputs

          The most common part numbers start with the numbers 78 or 79 and finish with two

          digits indicating the output voltage The number 78 represents positive voltage and 79

          negative one The 78XX series of voltage regulators are designed for positive input

          The LM78XX series typically has the ability to drive current up to 1A For

          application requirements up to 150mA 78LXX can be used As mentioned above the

          component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

          an output leg with the regulators voltage

          As a general rule the input voltage should be limited to 2 to 3 volts above the output

          voltage The LM78XX series can handle up to 36 volts input be advised that the power

          difference between the input and output appears as heat If the input voltage is unnecessarily

          high the regulator will overheat Unless sufficient heat dissipation is provided through heat

          sinking the regulator will shut down

          711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

          7111 WORKING

          The MAX-232 It includes a Charge Pump which generates

          +10V and -10V from a single 5v supply

          This IC also includes two receivers and two transmitters in

          the same package This is handy in many cases when we only want to

          use the Transmit and Receive data Lines We dont need to use two chips one for the

          receive line and one for the transmit There are also many variations of these devices The

          large value of capacitors are not only bulky but also expensive Therefore other devices are

          available which use smaller capacitors and even some with inbuilt capacitors However the

          MAX-232 is the most common and thus we will use this RS-232 Level Converter

          Dual Charge-Pump Voltage Converter

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

          V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

          output

          712 OPTOCOUPLER IC (4N33)

          7121 WORKING

          In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

          photoMOS) is a device that uses a short optical transmission path to transfer a signal

          between elements of a circuit typically a transmitter and a receiver while keeping them

          electrically isolated mdash since the signal goes from an electrical signal to an optical signal

          back to an electrical signal electrical contact along the path is broken

          Optocouplers typically come in a small 6-pin or 8-pin IC package but are

          essentially a combination of two distinct devices an optical transmitter typically a gallium

          arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

          light-triggered diac The two are separated by a transparent barrier which blocks any

          electrical current flow between the two but does allow the passage of light

          The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

          silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

          of isolation between driving and load circuits These Optocouplers can be used to replace

          reed and mercury relays with advantages of long life high speed switching and elimination

          of magnetic field

          713 MICROCONTROLLER IC (89V51 RD 2 )

          713 WORKING

          The P89V51RD2 is an 80C51 microcontroller with 64

          kB Flash and 1024 bytes of data RAM

          A key feature of the P89V51RD2 is its X2 mode option

          The design engineer can choose to run the application with the conventional 80C51 clock

          rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          achieve twice the throughput at the same clock frequency Another way to benefit from this

          feature is to keep the same performance by reducing the clock frequency by half thus

          dramatically reducing the EMI

          The Flash program memory supports both parallel programming and in serial In-

          System Programming (ISP) Parallel programming mode offers gang-programming at high

          speed reducing programming costs and time to market ISP allows a device to be

          reprogrammed in the end product under software control The capability to fieldupdate the

          application firmware makes a wide range of applications possible The P89V51RD2 is also

          In-Application Programmable (IAP) allowing the Flash program memory to be

          reconfigured even while the application is running

          714 RELIMATE CONNECTOR

          7141 WORKING

          These are wire to board type connectors used to facilitate

          proper and firm electrical connection between the relay card and

          microcontroller card

          The connector has following specifications

          No of Ways 2-20

          Voltage Rating 250V AC DC

          Current Rating 3A AC DC

          Contact Resistance 20mW max

          Insulation Resistance 1000MW min

          Dielectric Withstanding 1000V ACminute

          Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

          The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

          connector is it provides a fast and easy connection and disconnection it also avoids polarity

          conflicts

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          715 RS-232 PORT CONNECTOR

          7151 WORKING

          Almost all digital devices which we use require either TTL

          or CMOS logic levels Therefore the first step to connecting a

          device to the RS-232 port is to transform the RS-232 levels back

          into 0 and 5 Volts This is done by RS-232 Level Converters

          Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

          Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

          The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

          problem in many instances where only a single supply of +5V is present

          CHAPTER 8

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          IMPLIMENTATION

          OF THE PCB

          Components layout designing

          Developing or Etching the PCB

          Other operations like Drilling Cutting Tinning

          81 IMPLIMENTATION OF THE PCB

          A proper PCB ensure that various circuit components are interconnected as per the

          circuit diagram once they have been placed on the PCB in their proper positions and

          subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

          base material to which is permanently attached a flat metallic network of conducting path

          whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

          for this project is single one

          The basic material used may be resin coated paper fiber glass ceramic and the flat

          board configuration however is most widely used and it may be of the nature of the single

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

          which ensures adequate and permanent low resistance coupling

          811 BOARD DESIGN

          PCB designed is the most important and requires great care during work In this case

          great care must be taken while tracing the circuit or layout on the board Because once PCB

          is designed it is virtually impossible to alter it While designing a circuit designer should

          take care to avoid crossing of conducting path (tracks) as possible Crossover are

          unavoidable then only of the jumper can be used A circuit board carrying on both sides can

          also help to solve this problem when circuit is complicated

          812 THE MASTER DIAGRAM

          The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

          which is commonly made twice as the finished circuit since this makes the working on that

          much easier especially when circuit is complicated photography eventually reduces the

          size of diagram to that of the circuit before proceeding we must know some rules regarding

          the designing -

          a The space between the conductors must be strictly controlled to avoid the possibility

          of electrical discharges or unwanted capacitance The amount by which the mater

          diagram is to reduce in size is thus a critical deign feature

          b The conductor must be wider in those part of the circuits that are going to handle

          large current must be handle without undue temperature of conductors

          c The minimum width of copper should not generally be less than about 15mmThis

          is related to mechanical strength rather than electrical properties and it also ensure

          that strips remains securely bounded to the base material

          d The points where the component holes for component lead wire occurs must be sited

          to suit the dimensions of the component and dimensions between lead-out wire so

          that the components can be situated correctly on finished board The conductor is

          also main large at the point of holes

          813 PCB MAKING

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          When the mater diagram probable twice the size of real PCB has been evolved the

          test major step consists of etching or dissolving the unwanted metal from copper claded

          board to create a circuit as depicted by master diagram It must be stressed that very

          accurate checking master is essential at this stage Then the master point is mounted on a

          special frame on easy facing of a larger camera and with the aid of the very powerful

          illumination a master diagram is clearly photographed on a glass sensitive plate This is

          developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

          brought into operation This comprises the camera body mounted so that sideways after

          each exposure In this way number of copies of the original master diagram is set out

          exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

          In case of simple and need of number of less PCB economic and advisable to use the

          following lab method of PCB making

          Planning The Circuit

          It is not a particular difficult There are several important factors that need not be

          taken into account if the finished device is to work properly we must consider gain factor

          and ensure that the input and output parts are sufficiently well isolated to avoid the

          possibility We must also ensure that conductors and components carrying high frequency

          current are well separated from the part of the circuit We are also to make sure that all

          components need to return to earth are properly connected and that possibility of common

          impedance arising earth returned

          Circuit is totally eliminated by making all earth as substantial possible consistent

          with nature of design Other factors that have to successfully studied include availability of

          adequate return points on board and itrsquos mounting from accessibility of switch connection

          made for mechanical fixing ventilation effect of vibration

          Cleaning The Board

          The copper side of the board must be thoroughly cleaned before circuit plan is

          transferred to it This is important because even slightest trace of graze (from figure of

          instance) will impure the etching process and when the circuit plan has been neatly

          transferred to copper in this manner the board is held under running tap and the allowed to

          dry before resist is applied

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Transforming the Plan

          Now once cleaning is done plan has to transfer on copper surface of PCB material

          A convenient way to do this is simply put the carbon paper between a copper surface of the

          board and working plan and carefully trace the lines of original plan with a ball pen

          Resist

          Resist is nothing more than a substrate that is unaffected by presence etching

          chemicals It is usually colored so that it can be easily seen the copper surface when plan is

          clearly worked on clean copper that are to be left in fact as the copper conductor must be

          covered when resists the leaguer type of paints possess good resist properties but

          disadvantage of relatively long time taken for drying It is essential to resist through

          hardening before etching is started Nail polished are better as they quickly and are less

          difficult to remove

          To overcome this drying effect and to achieve the sharp edge of the trace on the

          PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

          short circulating due to paints are completely the avoid etching tapes and pads are available

          in different sizes

          Correcting Error

          When a result has been thoroughly hardened any errors that have been made can

          usually be corrected by gently scratching away with knife To ensure clear out lines round

          edges of copper conductors on board the resist must be applied with steady band

          Etching

          Next comes etching of unwanted copper amp whether a small single is all that is

          required as quantity of board to be produce certain precautions must be taken before

          operation is commenced the most used etch amp I ferrite chloride to this is added small

          quantity of HCL to accelerate But not critical as lab construction concerned A good

          etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

          grams of water

          Agitation

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

          the etchant process The depth of liquid must be sufficient to completely cover laminate the

          laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

          gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

          temperature and thickness of copper foil

          Finishing Off

          When all unwanted copper is dissolved from areas between conductor board should

          be taken from an etchant amp washed in water The resist must be removed using proper

          solvent After this the copper surface must be polished with any kind of cleaner It should be

          seen that there is no slight incomplete etching between the conducting parts of the PCB The

          PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

          This process is called Tinning This process of coating involve track with soldier

          Advantage of tinning the effect of environment of conductors then PCB is drilled

          ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

          Assembling On PCB

          After the holes are drilled the component have to be assembled on PCB before

          assembling the components it is necessary to clean soldering iron in order to get easy amp

          accurate soldering Removing impurity particles that are gathered on iron bit due to

          repetitive use cleans soldering iron

          CHAPTER 9

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          SOLDERING

          TECHNIQUE

          Technique for good soldering

          91 SOLDERING TECHNIQUE

          For soldering of any joints first the terminal to be soldered are cleaned to remove

          oxide film or dirt on it If required flux is applied on the points to be soldered

          Now the joint to be soldered is heated with the help of soldering iron Heat

          applied should be such that when solder wire is touched to joint it must melt

          quickly

          The joint and the soldering iron is held such that molten solder should flow

          smoothly over the joint

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          When joint is completely covered with molten solder the soldering iron is re-

          moved

          The joint is allowed to cool without any movement

          The bright shining solder indicates good soldering

          In case of dry solder joint a air gap remains in between the solder material and

          the joint It means that soldering is improper This is removed and again solder-

          ing is done

          Thus this way all the components are soldered on P C B

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 10

          PCB LAYOUTS

          Schematic diagram

          Bottom and top layout

          101 POWER SUPPLY CARD

          1011 SCHIMETIC DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1012 LEGEND MARKING

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

          Fig1011 Schematic diagram of power supply card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1013TOP LAYER

          1014 BOTTOM LAYER

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

          Fig1013 Top layer of power supply

          card

          Fig1014 Schematic diagram of power supply card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          102 BATTERY CHARGER CARD

          1021 SCHEMATIC DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

          Fig1021 Schematic diagram of battery charger card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          103 RELAY CARD

          1031 SCHIMETIC DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

          Fig1031 Schematic diagram of Relay card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1032 RELAY CARD LEGEND MARKING

          1033 TOP LAYER

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

          Fig1032 Legend marking of Relay card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1034 BOTTOM LAYER

          104 MICROCONTROLER CARD

          1041 SCHIMETIC DIAGRAM

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

          Fig1034 Bottom layer of Relay card

          Fig1041 Schematic diagram of microcontroller card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1042 ALL LAYERS

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

          Fig1042 All layer of microcontroller card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 11

          INTRODUCTION

          OF SOFTWARE

          Keil (microVision 2)

          Eagle (Easily Applicable Graphical Layout Editor)

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          111 Keil (microVision 2)

          1111 Introduction to C51 Cross Compiler

          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

          generate fast compact code for the 8051 microcontroller family The C51 Compiler

          generates object code that matches the efficiency and speed of assembly programming

          Using a high-level language like C has many advantages over assembly language

          programming

          Knowledge of the processor instruction set is not required Rudimentary knowledge of

          the memory structure of the 8051 CPU is desirable (but not necessary)

          Details like register allocation and addressing of the various memory types and data

          types is managed by the compiler

          Programs get a formal structure (which is imposed by the C programming language) and

          can be divided into separate functions This contributes to source code reusability as

          well as better overall application structure

          The ability to combine variable selection with specific operations improves program

          readability

          Keywords and operational functions that more nearly resemble the human thought

          process may be used

          Programming and program test time is drastically reduced

          The C run-time library contains many standard routines such as formatted output

          numeric conversions and floating-point arithmetic

          Existing program parts can be more easily included into new programs because of

          modular program construction techniques

          The language C is a very portable language (based on the ANSI standard) that enjoys

          wide popular support and is easily obtained for most systems Existing program

          investments can be quickly adapted to other processors as needed

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1112 Software Development Cycle in Keil

          When we use the Keil Software tools the

          project development cycle is roughly the same as

          it is for any other software development project

          1 Create a project select the target chip from the

          device database and configure the tool settings

          2 Create source files in C or assembly

          3 Build your application with the project

          manager

          4 Correct errors in source files

          5 Test the linked application A block diagram of

          the complete 8051 tool set may best illustrate the

          development cycle

          112 Eagle (Easily Applicable Graphical Layout Editor)

          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

          printed circuit boards (PCBs) It is a complete platform for the development of any type of

          complicated amp sophisticated multilayered PCBs This software consist of the following tool

          1121 Schematic Editor

          In this one can develop amp design circuits for the required PCB

          1122 Layout Editor

          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

          Fig 111 Software development in KEIL

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1123 Library Editor

          This is very useful in case of customized component design that does not occur in the predefined library according to our need

          1124 Auto Router

          This is an artificial intelligence based tool or subroutine that can do auto routing of

          the PCB tracks designed

          1125 Cam Processor

          This is used to finally print the various layers of the designed PCB viz Top Layer

          Bottom Layer Component Layer Masking Layer etc

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

          Start

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 12

          INTRODUCTION

          OF

          PROGRAMMING

          Flowchart of programming

          Program code

          121 Flowchart

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

          2

          flag9==1

          flag9=1

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

          flag11==1

          flag11=1 flag11=0 flag4=0

          REady_LED4=0

          Sw2_op (P01) ==0

          My delay (10)

          3 3

          flag2=1 disp2=1 k2=0

          3

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

          4

          flag11==1

          flag11=0 flag4=0 REady_LED4=0

          flag11=1

          My delay (10)

          flag3=1 disp3=1 k3=0

          k1==0||k2==0||k4==0

          Sw3_op (P02) ==0

          5

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

          flag5==1

          5

          flag11==1

          flag7=1

          flag7==1

          flag7=0 flag2=0 REady_LED2=0

          6

          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

          flag11=0 flag4=0 REady_LED4=0

          flag11=1

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

          6

          My delay (10)

          flag4=1 disp4=1 k4=0

          k1==0||k2==0||k3==0 flag5==1

          7

          Sw4_op (P03) ==0

          flag5=1 flag5=0 flag1=0 REady_LED1=0

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

          7

          flag7==1

          flag9==1

          flag7=1

          flag7=0 flag2=0 REady_LED2=0

          flag9=0 flag3=0 REady_LED3=0

          flag9=1

          Sw5_op A(P04) ==0

          My delay (10)

          8

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

          9

          flag2==1

          flag3==1

          8

          flag1==1

          flag4==1 flag5=1 disp5=1

          flag9=1 disp5=1

          flag7=1 disp5=1

          flag11=1 disp5=1

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

          Sw6_op (P05) ==0

          My delay (10)

          flag2==1 ampamp flag7==1

          flag3==1 ampamp flag9==1 9

          flag1==1 ampamp flag5==1 flag6=1 disp6=1

          flag8=1 disp6=1

          10

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

          10

          flag4==1 ampamp flag11==1

          flag10=1 disp6=1

          flag12=1 disp6=1

          flag8==1

          flag10==1

          11

          flag6==1

          i++

          l++

          j++

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

          flag12==1

          M++

          11

          Stop

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          122 Program

          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

          define buzzerP2_0 buzzer indication

          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

          sbit sw5_op=P0^4 input switch5 for coin

          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

          output Led for indication

          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

          function prototype declaration

          void my_delay(unsigned int value) DELAY FUCTION

          void init_timer() timer 0 initialization function

          variable declaration

          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          start of main programme

          void main()

          init_timer() call it timer initialization function

          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

          start of while loop

          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

          condition for switch1

          if(flag1==1) check swich1 pressed if(disp1==1 )

          REady_LED1=1 turn on Ready indication of led 1 disp1=0

          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

          if(iltk) loop will repeat for desired time of charging

          if(igt=1000)

          buzzer=1 turn on buzzer if (ii==20)

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          REady_LED1=1 turn on ready indication of led1

          else if(ii==40)

          REady_LED1=0ii=0

          elseREady_LED1=0

          START_LED1=1

          else

          START_LED1=0

          k1=1 buzzer=0

          REady_LED1=0 flag1=0

          flag5=0flag6=0

          condition for switch2

          if(flag2==1) check swich2 pressed if(disp2==1)

          REady_LED2=1 turn on ready 2 led indication

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          disp2=0

          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

          if(jltk)

          if(jgt1000) buzzer=1 if(jj==20)

          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

          elseREady_LED2=0

          START_LED2=1

          else START_LED2=0

          REady_LED2=0 k2=1 buzzer=0

          flag2=0flag7=0flag8=0

          j=0jj=0

          condition for switch 3

          if(flag3==1) check swich3 pressed

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          if(disp3==1 )

          REady_LED3=1 disp3=0

          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

          if(lltk)

          if(lgt1000) buzzer=1 if(ll==20)

          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

          elseREady_LED3=0

          START_LED3=1

          else START_LED3=0

          LED2=0 k3=1 buzzer=0

          REady_LED3=0 flag3=0

          flag9=0flag10=0

          l=0ll=0

          condition for switch 4

          if(flag4==1) check swich4 pressed if(disp4==1 )

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          REady_LED4=1 disp4=0

          if(flag11==1) check coin is pressed

          if(flag12==1) START is pressed

          if(mltk)

          if(mgt1000)

          buzzer=1 if(mm==20)

          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

          elseREady_LED4=0

          START_LED4=1

          else START_LED4=0

          buzzer=0 k4=1

          REady_LED4=0 flag4=0

          flag11=0flag12=0

          m=0mm=0

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          while(1)

          end of main programme

          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

          whenever specific time the interrupt will generate control will go in following function

          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if(sw1_op==0 ) ready switch flag for system1

          my_delay(10) CALL DELAY FUNCTION

          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

          if(flag7==1) SET THE FLAG

          flag7=1

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

          flag9=1

          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

          flag11=1

          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if(sw2_op==0 ) fready switch flag for system2

          my_delay (10)

          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

          if(flag5==1)

          flag5=1

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

          flag9=1

          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

          flag11=1

          elseflag11=0flag4=0REady_LED4=0

          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

          if(flag7==1)

          flag7=1

          else

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          flag7=0flag2=0REady_LED2=0 if(flag5==1)

          flag5=1

          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

          flag11=1

          elseflag11=0flag4=0REady_LED4=0

          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

          if(flag7==1)

          flag7=1

          elseflag7=0

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          flag2=0REady_LED2=0 if(flag5==1)

          flag5=1

          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

          flag9=1

          elseflag9=0flag3=0REady_LED3=0

          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          disp5=1 if(flag4==1 ) flag11=1 disp5=1

          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

          if(flag6==1)

          i++ if (igt1000) ii++

          if (flag8==1)

          j++ if(jgt1000) jj++

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          if (flag10==1)

          l++ if (lgt1000) ll++

          if (flag12==1)

          m++ if (mgt1000) mm++

          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 13

          TROUBLE SHOOT

          Troubleshoot

          131 TROUBLE SHOOT

          A newly assembled circuit does not work may be due to -

          Faulty components

          Improper soldering

          Wrong connections

          Also any stop in working after some period may be due to -

          Component failure

          Supply failure

          Damaging of PCB

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Fault finding is very essential if you want the circuit to operate properly

          If a newly assembled circuit is not working properly check all the components and

          circuit connections according to the diagram The circuit may not be working due to wrong

          polarity of capacitor diode and wrong supply terminal connection Most of the times the

          circuit does not work due to bad soldering Therefore proper procedure is followed to have

          proper soldering

          If faults are not observed during physical observations one should proceed for Hot

          test ie Voltage measurement at different points for example at Input terminal etc

          Resistance measurement is also done which is known as Dry test

          During this project work some green LEDs was not glow then we checked it

          continuity and replace it

          Also relay was not properly worked therefore we replaced it Some ICs was get

          heated after starting the project It happens because of some soldering points are shorted

          during soldering PCB We solved that problem

          CHAPTER 14

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          ADVANTAGES OF

          THE PROJECT

          Advantages

          141 ADVANTAGES OF THE PROJECT

          Simple and hand efficient Microcontroller based system

          Fast charging capacity

          Simple to operate

          Ease of mobility

          Facilitates connectivity for 90 of cellular phones

          Less expensive

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Reduced man power

          Low power consumption

          It can offer emergency charging for 4sets of handsets synchronously

          CHAPTER 15

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          DISADVANTAGES

          OF THE PROJECT

          Disadvantages

          151 DISADVANTAGES OF THE PROJECT

          It requires mains supply to work project

          Due to limited charging channels till now there may be a possibility that

          mobile phones of few brands cannot be connected for charging For this

          purpose we have to use separate connectors for that specific brand differently

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

          min

          It does not have battery backup therefore it cannot be portable

          CHAPTER 16

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          APPLICATIONS OF

          THE PROJECT

          Application

          161 APPLICATIONS OF THE PROJECT

          The coin based mobile phone charger is very useful to public for using coin to

          charge for the mobile phone in any places

          It is used for emergency charging purposes

          It can be installed in malls railway stations bus stops and other public

          places

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          The charger offers a unique revenue opportunity for a vast range of

          businesses - from airports to pubs from universities to health clubs virtually

          any location where there is a high footfall creating a large number of

          potential users

          It can be installed in offices and collages for pay charging facility

          CHAPTER 17

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          FUTURE

          DEVELOPMENT OF

          THE PROJECT

          FUTURE DEVELOPMENT OF THE PROJECT

          171 FUTURE DEVELOPMENTOFTHE PROJECT

          This project is very useful to people who are using mobile phone without charging

          condition in public places

          It will use with a stereo advertisement carrier that can display video advertisement

          It will provide battery backup for make it portable

          It will also provide SMS system in future

          We can also increase the charging time by editing software of the project

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 18

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          COST ANALYSIS

          OF THE PROJECT

          COST ANALYSIS OF THE PROJECT

          181 COST ANALYSIS OF THE PROJECT

          1811 Component list for power supply card

          Footprint Quantity Designators Rate

          Resistor

          22K 1 R2 1

          1K 1 R1 1

          Capacitor

          1000uf25V 1 C5 10

          2200uf25V 1 C1 10

          022uf 2 C6 C2 1

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

          Table 1811 Component list for power supply card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          01uf 2 C4 C3 1

          IC

          BRIDGE W10 2 BR2 BR1 10

          L7812CV (TO-220) 1 U2 8

          L7805CV (TO-220) 1 U1 8

          Connector

          CON PHO 2PIN 2 J3 J2 16

          CON PHO 3PIN 1 J1 12

          LED3mm red 2 L1 L2 15

          Heat sink (TO-220) 2 16

          Total 955

          1812 Component list for battery charger card

          Footprint Quantity Rate

          Capacitor

          2200uf25V 1 1000

          022uf 4 100

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          01uf 4 100

          IC

          BRIDGE W10 1 500

          L7805CV (TO-220) 4 3200

          Connector

          CON PHO 2PIN 1 800

          Relimate 2 pin 1 400

          relimate 3 pin 4 2000

          Heat sink (TO-220) 4 1200

          TOTAL 9300

          1813 Component list for Relay card

          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

          Table 1812Component list for battery charger card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          RELIM-4 1 J1 700 16 pin ic socket 1 400

          Total 18900

          1814Component list for controller card

          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

          Table 1813Component list for relay card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

          total 27000

          1815 Miscellaneous material

          Material Quantity Rate

          electronic item

          Transformer

          TXR1 0-9-15 1 20000

          0-9 1A

          0-15 100mA

          TXR2 0-9 1 16500

          0-9 1A

          Proximity switch 1 20000

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

          Table 1814Component list for microcontroller card

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Red push bottom 4 4000

          Green push button 1 1000

          Red led 5mm 4 800

          Green led 5mm 4 800

          Led holder 8 1600

          Copper clad 2 4000

          3 core cable 1 meter 1500

          3 pin plug 1 3000

          2 pin relimate wire 19 9000

          3 pin relimate wire 5 3750

          4 pin relimate wire 2 2000

          mechanical items

          Enclosure 1 25000

          Acrylic sheet 2 X 1 30000

          12mm cable gland 1 1000

          Screw 3mm 33 2000

          Screw 35mm 6 2400

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          10 mm spacers 100 1500

          10mm insert to stud 50 10000

          cable tie 2500

          Total 162350

          CHAPTER 19

          APPENDIX

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

          Table 1815Component list for miscellaneous material

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          APPENDIX

          191 APPENDIX

          1911 78xx IC datasheet

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1912 W10 datasheet

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1913 4n33 IC datasheet

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

          1914 MAX 232

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1915 ULN2003a IC datasheet

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          1916 89V51RD2 IC datasheet

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 20

          CONCLUSION

          CONCLUSION

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          201 CONCLUSION

          The coin-operated mobile phone charger is already successfully installed in

          hundreds of locations worldwide providing a unique service to the public and a source of

          revenue for site providers The coin-operated mobile charger can be quickly and easily

          installed in any business premises

          The charger offers a unique revenue opportunity for a vast range of businesses ndash

          from airports to pubs from universities to health clubs virtually any location where there is

          a high footfall creating a large number of potential users

          The charger can charge up to 4 different mobile phones simultaneously It will

          extend low mobile phone talk time provide battery charging

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 21

          IMAGES OF THE

          PROJECT

          Images of the project

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          211 IMAGES OF THE PROJECT

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

          fig211 lsquoCoin operated mobile battery charger

          Fig212 Circuit arrangement of coin operated mobile battery charger

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Fig 216 Relay driver circuit

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

          Fig 213 Constant voltage battery charger circuit

          Fig214 Power supply circuit

          Fig215 Metal detector proximity switch

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Fig217 Microcontroller circuit

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          Fig228 coin operated mobile battery charger project presentation

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          CHAPTER 22

          BIBILOGRAPHY

          BIBLIOGRAPHY

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

          221 BIBLIOGRAPHY

          BOOKS

          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

          INTERNET LINKS

          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

          • CHAPTER 1

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 3

            DEVELOPMENT

            STAGES amp

            PROCESS

            Development stages and process of the project

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 6

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            31 DEVELOPMENT STAGES amp PROCESS

            The complete development of this project can be divided into the following stages

            Problem definition stage

            Designing block diagram

            Implementing circuits and components

            Developing algorithm for software

            Writing actual code for Microcontroller

            Compiling the code

            Burning the hex file into microcontroller with programmer

            Testing and Running

            311 Problem definition stage

            This is the very first stage to develop any project It actually defines the aim

            and the concept of the project At inconvenient times when access to a standard

            charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

            designed to solve this problem The charger operates like a vending machine all a

            user has to do is plug the mobile phone into one of the four adapters and insert a

            coin the phone will then be given a micro-pulse fast charge in just 10 minutes

            312 Designing block diagram

            At this stage we have categorized the whole system into different individual

            modules These modules (block diagrams) will be helpful in understanding the

            concept and working of the integrated system It also simplifies the entire debugging

            and testing process

            313 Implementing circuits and components

            This is the actual implementation of circuit of each block At this stage we

            have actually designed each block separately and finally integrated them into the

            complete working system

            314 Developing for software

            To get the logical flow of the software the development of algorithm having

            a prominent role So that we have to analyze the complete system and organized the

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            algorithm in such a manner that one can understand the complete working of the

            software

            315 Writing actual code for Microcontroller

            After the development of the algorithm and flowchart we have actually

            translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

            that it can understand the instructions and run as per our requirement The

            instructions are in ANSII C Language

            316 Compiling the code

            The hand written code on paper was then transferred into computer For that

            we have used Keil pre-install on PC The Keil is a Computer Aided Program to

            simulate the working of Microcontroller in real time without burning the software

            into actual IC We simulated and compiled our program for error checking After

            removing several compiling errors the program was converted into machine language

            ie Philips hex format

            317 Burning the hex file into microcontroller with Programmer

            In this stage the compiled hex format file was downloaded or burned into

            flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

            system programming software provided by the manufacturer itself

            318 Testing and Running

            This time we tested our project for actual working after loading the Software

            into the microcontroller Any errors found were removed successfully This is the last

            and final stage of development of our project

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 4

            BLOCK DIAGRAM

            OF THE PROJECT

            Block Diagram Brief Explanation

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            41 Block Diagram

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

            Fig 41 Block diagram of the project

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            42 Brief Explanation

            421 POWER SUPPLY

            Power supply is used to deliver power to the circuit It delivers +5Vdc to

            microcontroller and other peripherals and +12Vdc delivers power to relay

            422 COIN INPUT AND LEVEL CONVERTOR

            Coin input is a sensor which senses a metal and produces an output voltage This

            voltage is high as compared to the input required for microcontroller

            Hence a level shifter is used to bring down the voltage level which could be

            readable to microcontroller

            423 START SWITCH

            Start switch is used to start the charging process of a

            mobile phone

            424 RS232 INTERFACING TO PC

            RS 232 is a protocol used for communication between

            computer and microcontroller It is also used for

            programming the microcontroller in its ISP (in system

            programming) mode

            425 CHANNEL READY INDICATOR

            It provides visual indication for the channel which is in

            charging mode

            426 DARLINGTON PAIR ARRAY

            Darlington pair array is used as a relay driver

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            427 CHANNEL IN CHARGE INDICATION

            It provides visual indication for the channel which is in

            charging mode

            428 RELAY ARRAY

            Relay array consists of relays for each channel to

            provide electromechanical switching in between charger and

            mobile phone

            429 CHARGER ARRAY

            Charger array is used to provide charging power to the

            mobile phones through the electromechanical switches

            4210 CELL PHONE TO CHARGE

            Channel select switch is used for selecting a channel on

            which the mobile phone is to be charged

            4211 MICROCONTROLLER

            Microcontroller is used to control the whole operation of

            the device Microcontroller reads input signal from input

            device and triggers the output device According to the

            conditions defined in the microcontroller by the programmer

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 5

            CIRCUIT

            DIAGRAM

            EXPLANATION

            Circuit diagram

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Circuit diagram explanation Working

            51 POWER SUPPLY CIRCUIT

            511 CIRCUIT DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

            Fig51 Circuit diagram of the power supply

            Bridge RectifierTRANSFORMER

            Filter Voltage regulator Load

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            512 WORKING

            Transformer

            A step-down transformer is used to achieve our requirements of the power

            supply It steps down high voltage ac mains to low voltage ac mains

            Bridge Rectifier

            A bridge rectifier makes use four diodes in a bridge arrangement to achieve

            full wave rectification This is a widely used configuration both with individual

            diodes wired and with single component bridges where the diode bridge is wired

            internally It also converts ac to dc but the dc output is varying

            One advantage of a bridge rectifier over a conventional full-wave rectifier is

            that with a given transformer the bridge rectifier produces a voltage output that is

            nearly twice that of the conventional full-wave circuit

            Filter

            The output of the rectifier is a pulsating dc wave We need a constant dc

            output To do this we need to filter out the oscillation from the pulsating dc wave

            This is obtained with a diode capacitor combination

            Voltage Regulator

            A voltage regulator is used for voltage regulation in the circuit This provides

            a protection to the circuits in the case of fluctuations It eliminates ripples by setting

            dc output to fixed voltages

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

            Fig 52 Block diagram of the power supply

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Load

            The load can be anything which wants to switch ON by using power supply

            513 CIRCUIT DIAGRAM EXPLANATION

            Regulated power supplies are commonly used in engineering projects Power

            supply is food of any circuit

            +5V SUPPLY UNIT

            +5V supply is obtained from the +5V supply unit for microcontroller and

            digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

            transformer having a capacity of 500mA

            Since the input voltage to the regulator IC should be more than its output

            voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

            of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

            smooth DC supply The rating of the chosen capacitor filter is 1000microF

            The regulated DC voltage is obtained by using a regulator IC 7805 In the

            case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

            Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

            output of regulator IC to eliminate the voltage oscillations at the output due to the large

            voltage oscillations at the input of the regulator

            +12V SUPPLY UNIT

            The plusmn12 V supply required by the relay is provided by the 12V supply circuit

            arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

            step down transformer having a capacity of 1A and the center tap of the transformer is

            grounded This low voltage is rectified with the help off bridge rectifier

            Since the input voltage to the regulator IC should be more than its output

            voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

            the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

            filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

            For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

            7912 is used

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

            the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

            connected at the output as shown in figure to eliminate the voltage oscillations at the

            output due to the large voltage oscillations at the input of the regulator

            52 CONSTANT VOLTAGE CHARGER

            521 CIRCUIT DIAGRAM

            Fig 53 Circuit diagram of the battery charger

            522 CIRCUIT DIAGRAM EXPLANATION

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Constant-voltage (often called constant-potential) chargers maintain nearly the same

            voltage input to the battery throughout the charging process regardless of the batterys state

            of charge Constant-voltage chargers provide a high initial current to the battery because of

            the greater potential difference between the battery and charger

            A constant-voltage charger may return as much as 70 of the previous discharge in

            the first 30 minutes This proves useful in many battery applications involving multiple

            discharge scenarios As the battery charges its voltage increases quickly This reduces the

            potential that has been driving the current with a corresponding rapid decrease in charge

            current as depicted in the illustration below As a result even though the battery reaches

            partial charge quickly obtaining a full charge requires prolonged charging

            Given this behavior constant-voltage chargers are frequently found in applications

            that normally allow extended charging periods to attain full charge Constant-voltage

            chargers should not be used where there is frequent cycling of the battery Repeated

            discharges without returning the cell to its full charge will eventually decrease the battery

            capacity and may damage individual cells

            Fig 54An Illustration graph of the charging function of constant battery charger

            Constant-voltage chargers are most often used in two very different modes as a fast

            charger to restore a high percentage of charge in a short time or as a float charger to

            minimize the effects of overcharge on batteries having infrequent discharges

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            53 RELAY DRIVER CIRCUIT

            531 CIRCUIT DIAGRAM

            532 CIRCUIT DIAGRAM EXPLANATION

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

            Fig 55 Relay driver circuit

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Input from the controller is connected to the relay card through connector J1 which

            carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

            pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

            These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

            relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

            series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

            and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

            relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

            NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

            3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

            RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

            is used to connect power supply to relay card

            533 WORKING

            While taking Relay1 (RL1) into consideration we will discuss the working of relay

            card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

            of the IC are in cut off region which causes an open circuit so there is no current flow

            flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

            applied to the two pin1 of IC U1 the internal transistor goes in to active region and

            completes the path ie provide ground to the relay coil so the current flows through the

            LED activating the relay

            As the current flows through the relay coil it gets energized and switch over the

            contacts ie common and normally open contact get connected and provide a path to flow

            current from J11 ie charger into the load connected at J4 hence the cell phone charging

            process starts The same above process is applies for all relays If LED is fused or

            damaged the path will be open and relay will not be energized and if relay is damaged the

            led will not be illuminated So the LED here is used as a FAULT indicator and a

            CHARGING ON indicator

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            54 MICROCONTORLLER CIRCUIT

            541 CIRCUIT DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            542 CIRCUIT DIAGRAM EXPLANATION

            CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

            the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

            port P04 through J4 and START switch is connected to port P05 through SW5

            Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

            P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

            Output for relay card is taken on port P14 to P17

            Components C1 R1 and push button S1 forms reset circuit which provides a power

            on reset for the micro controller and even provide manual reset Crystal XL1 is a

            110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

            22pf capacitor used as loading capacitor for crystal

            Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

            RN2 resistance network

            IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

            the proximity switch and microcontroller and convert its output readable to microcontroller

            IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

            communication between PC and a microcontroller through connector J3

            Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

            communication process

            Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

            power supply connection

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            543 PORT ASSIGNMENTS FOR 89V51RD2FN

            P00 = switch1 for channel 1

            P01 = switch2 for channel 2

            P02 = switch3 for channel 3

            P03 = switch4 for channel 4

            P04 = switch5 for coin input sensor (proximity switch)

            P05 = switch6 for start charging

            P10 = channel 1 red LED1 (ready system)

            P11 = channel 2 red LED2 (ready system2)

            P12 = channel 3 red LED3 (ready system3)

            P13 = channel 4 red LED4 (ready system4)

            P14 = channel 1 relay (start system1)

            P15 = channel 2 relay (start system2)

            P16 = channel 3 relay (start system3)

            P17 = channel 4 relay (start system4)

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 6

            LIST OF THE

            COMPONENTS

            List of the components

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            61 LIST OF THE COMPONETS

            RESISTORS

            CAPACITORS

            LIGHT EMITING DIODES (LEDS)- Green Red

            RELAYrsquoS-

            TRANSFORMERS

            RECTIFIER BRIDGES (W 10)

            OSCILLATOR

            SWITCHES- Push switches

            DARLINGTON PAIR IC (ULN2003a)

            SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

            SERIAL COMMUNICATION DRIVER IC (MAX 232)

            OPTOCOUPLER IC (4N33)

            MICROCONTROLLER IC (89V51 RD2)

            RELIMATE CONNECTOR- 2 pin amp 4 pin

            RS-232 PORT CONNECTOR

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 7

            INTRODUCTION

            OF COMPONENTS

            Working of components

            Features or Uses of components

            Testing of components

            71 RESISTOR

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            711 WORKING

            Resistors limit current Resistors are considered to be the most used and the most

            important component of all the electronic circuits Resistors resist the flow of electrical

            current The higher the value of resistance (measured in ohms)

            the lower the current will be

            712 TESTING

            Read the indicated color code value then select the OHM-scale within but not way

            below the indicated value A resistor is good if its resistance is close to the indicated

            Tolerance should be considered with the ohmmeter reading While no resistance reading at

            all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

            ohmmeter scale settings resistor is shorted

            713 SPECIFICATIONS

            To completely specify a resistors characteristics requires knowledge of the following

            parameters-

            bull Value

            bull Tolerance

            bull Temperature Coefficient

            bull Power Rating

            The specification of a resistor may be marked on its surface using either of two

            systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

            the second more recent system uses a combination of alpha-numeric characters

            7 2 CAPACITOR

            721 WORKING

            When DC voltage is applied to the capacitor an electric charge is stored on each

            electrode While the capacitor is charging up current flows The current will stop flowing

            when the capacitor has fully charged Capacitors find use

            in circuits for a variety of purposes They are used in

            time delay generation RC circuits In power supplies for filtering and power supply

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            decoupling as blocking capacitors for power factor correction and motor starting in LC

            tank circuits and so on

            722 TESTING

            To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

            negative probe to the capacitor positive terminal the positive probe to the negative terminal

            A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

            and moves back again to infinite resistance position A defective indication for an

            electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

            which is an indication that the capacitor is shorted

            73 LIGHT EMITING DIODE (LED)

            731 WORKING

            LEDs are special diodes that emit light when

            connected in a circuit They are frequently used as pilot lights in electronic appliances to

            indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

            the heart of an LED the semi-conductor chip

            In our project Green LED are used here for mainly two purpose

            a Charging ON indication (when ON)

            b Channel fault indication (always OFF)

            732 TESTING

            The good and working LED will then light up or glow a busted LED will not LEDs

            must have a resistor in series to limit the current to a safe value for quick testing purposes a

            1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

            directly connected to a battery or power supply It will be destroyed the LED

            733 FEATURES

            Single color

            High bright output

            Low power consumption

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            High reliability and long life

            734 Descriptions

            Dice material GaInN

            Emitting Color Super Bright White

            Device Outlineφ5mm Round Type

            Lens Type Water Clear

            74 RELAY

            741 WORKING

            A relay is an electrically operated switch Current

            flowing through the coil of the relay creates a magnetic field

            which attracts a lever and changes the switch contacts The coil

            current can be on or off so relays have two switch positions and

            most have double throw (changeover) switch contacts

            Relays are like remote control switches and are used in

            many applications because of their relative simplicity long life

            and proven high reliability

            742 USES

            The main operation of a relay comes in places where only a low-power signal can be

            used to control a circuit

            It is also used in places where only one signal can be used to control a lot of circuits

            The application of relays started during the invention of telephones They played an

            important role in switching calls in telephone exchanges They were also used in

            long distance telegraphy They were used to switch the signal coming from one

            source to another destination

            743 TESTING

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            A relay will usually have a coil pole terminal and a set of

            contacts The set of contacts that are open when the relay is not

            energized are called normally open (NO) contacts and the set of

            contacts that are closed when the relay is not energized are called

            normally closed (NC) contacts The following steps can be used to perform the testing of

            the relay using a multimeter

            Keep the multimeter in the continuity check mode

            Check for continuity between the NC contacts and pole

            Check for discontinuity between NO contacts and the pole

            Now energies the relay using the rated voltage For example use a 9V battery for

            energizing a 9V relay The relay will engage with clicking sound

            Now check for continuity between NO contacts and pole

            Also check for discontinuity between NC contacts and pole

            As a final test measure the resistance of the relay coil using a multimeter and check

            whether it is matching to the value stated by the manufacturer

            If all the above tests are positive we can conclude that the relay is healthy

            75 TRANSFORMER

            751 WORKING

            A transformer is a device that transfers electrical energy

            from one circuit to another through inductively coupled

            electrical conductors A changing current in the first circuit (the

            primary) creates a changing magnetic field

            This changing magnetic field induces a changing voltage in the second circuit (the

            secondary) This effect is called mutual induction

            If a load is connected to the secondary circuit electric charge will flow in the

            secondary winding of the transformer and transfer energy from the primary circuit to the

            load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

            of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

            number of primary turns

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            By appropriate selection of the numbers of turns a transformer thus allows an

            alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

            making it less

            752 TESTING

            1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

            scale and then adjusting the knob to verify its reading is an easy step to the

            reading of the ohm

            2 To check the resistance of the coil unplug or unsolder the leads of the

            transformer from its circuit and measure the resistance of each coil

            3 The next step is to test each coil for shorts to other coils

            76 RECTIFIER BRIDGE (W 10)

            761 WORKING

            A diode bridge rectifier is a device for converting AC or

            alternating current electricity into DC or direct current AC

            electricity goes from positive to negative constantly whereas DC

            always flows in the same direction

            AC electricity is more efficient to transmit and easier to

            convert into different voltages However most appliances need DC current to run A diode

            bridge rectifier is the most common type of power supply used to provide this current In

            our project W10 is a bridge rectifier which provides on single semiconductor chip

            77 OSCILLATOR

            771 Working

            An oscillator puts out an endless series of pulses The output

            constantly goes from 0 volts to Vcc and back to 0 volts again Almost

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            all digital circuits have some type of oscillator This stream of output pulses is often

            called a clock One of the most important features of any oscillator is its frequency stability

            or in other words its ability to provide a constant frequency output under varying load

            conditions Some of the factors that affect the frequency stability of an oscillator include

            temperature variations in the load and changes in the DC power supply Frequency stability

            of the output signal can be improved by the proper selection of the components used for the

            resonant feedback circuit including the amplifier but there is a limit to the stability that can

            be obtained from normal LC and RC tank circuits

            In our project instead of 12MHz crystal 110592MHz is used because it can be

            divided to give you exact clock rates for most of the common baud rates for the UART

            especially for the higher speeds (9600 19200) These crystals are readily available and

            commonly used

            78 SWITCH

            781 WORKING

            The most familiar form of switch is a manually operated

            electromechanical device with one or more sets of electrical contacts

            Each set of contacts can be in one of two states either closed meaning

            the contacts are touching and electricity can flow between them or

            open meaning the contacts are separated and the switch is non

            conducting The mechanism actuating the transition between these two

            states (open or closed) can be either a toggle (flip switch for continuous on or off) or

            momentary (push-for on or push-for off) type

            782 USES

            In electronics a switch is an electrical component that can break an electrical

            circuit interrupting the current or diverting it from one conductor to another

            783 TESTING

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            When the switch is ON it looks and acts like a wire When the switch is OFF there is

            no connection Switch can tested by using multimeter in continuity range

            79 DARLINGTON PAIR IC (ULN2003a)

            791 WORKING

            The Darlington transistor (often called a Darlington pair) is a

            compound structure consisting of two bipolar transistors (either

            integrated or separated devices) connected in such a way that the

            current amplified by the first transistor is amplified further by the

            second one This configuration gives a much higher current gain than

            each transistor taken separately and in the case of integrated devices

            can take less space than two individual transistors because they can

            use a shared collector

            Integrated Darlington pairs come packaged singly in

            transistor-like packages or as an array of devices (usually eight) in an integrated circuit

            The Darlington transistor array used is ULN2003 Applications include relay

            drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

            drivers and logic buffers Each input of this device has a zener diode and resistor in series

            to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

            for each Darlington pair for operation directly with TTL or 5-V CMOS devices

            792 FEATURES

            The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

            transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

            with common-cathode clamp diodes for switching inductive loads The collector-current

            rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

            higher current capability

            710 SERIES VOLTAGE REGULATER IC (78XX)

            7101 WORKING

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Voltage Regulator (regulator) usually having three legs converts varying input

            voltage and produces a constant regulated output voltage They are available in a variety of

            outputs

            The most common part numbers start with the numbers 78 or 79 and finish with two

            digits indicating the output voltage The number 78 represents positive voltage and 79

            negative one The 78XX series of voltage regulators are designed for positive input

            The LM78XX series typically has the ability to drive current up to 1A For

            application requirements up to 150mA 78LXX can be used As mentioned above the

            component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

            an output leg with the regulators voltage

            As a general rule the input voltage should be limited to 2 to 3 volts above the output

            voltage The LM78XX series can handle up to 36 volts input be advised that the power

            difference between the input and output appears as heat If the input voltage is unnecessarily

            high the regulator will overheat Unless sufficient heat dissipation is provided through heat

            sinking the regulator will shut down

            711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

            7111 WORKING

            The MAX-232 It includes a Charge Pump which generates

            +10V and -10V from a single 5v supply

            This IC also includes two receivers and two transmitters in

            the same package This is handy in many cases when we only want to

            use the Transmit and Receive data Lines We dont need to use two chips one for the

            receive line and one for the transmit There are also many variations of these devices The

            large value of capacitors are not only bulky but also expensive Therefore other devices are

            available which use smaller capacitors and even some with inbuilt capacitors However the

            MAX-232 is the most common and thus we will use this RS-232 Level Converter

            Dual Charge-Pump Voltage Converter

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

            V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

            output

            712 OPTOCOUPLER IC (4N33)

            7121 WORKING

            In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

            photoMOS) is a device that uses a short optical transmission path to transfer a signal

            between elements of a circuit typically a transmitter and a receiver while keeping them

            electrically isolated mdash since the signal goes from an electrical signal to an optical signal

            back to an electrical signal electrical contact along the path is broken

            Optocouplers typically come in a small 6-pin or 8-pin IC package but are

            essentially a combination of two distinct devices an optical transmitter typically a gallium

            arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

            light-triggered diac The two are separated by a transparent barrier which blocks any

            electrical current flow between the two but does allow the passage of light

            The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

            silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

            of isolation between driving and load circuits These Optocouplers can be used to replace

            reed and mercury relays with advantages of long life high speed switching and elimination

            of magnetic field

            713 MICROCONTROLLER IC (89V51 RD 2 )

            713 WORKING

            The P89V51RD2 is an 80C51 microcontroller with 64

            kB Flash and 1024 bytes of data RAM

            A key feature of the P89V51RD2 is its X2 mode option

            The design engineer can choose to run the application with the conventional 80C51 clock

            rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            achieve twice the throughput at the same clock frequency Another way to benefit from this

            feature is to keep the same performance by reducing the clock frequency by half thus

            dramatically reducing the EMI

            The Flash program memory supports both parallel programming and in serial In-

            System Programming (ISP) Parallel programming mode offers gang-programming at high

            speed reducing programming costs and time to market ISP allows a device to be

            reprogrammed in the end product under software control The capability to fieldupdate the

            application firmware makes a wide range of applications possible The P89V51RD2 is also

            In-Application Programmable (IAP) allowing the Flash program memory to be

            reconfigured even while the application is running

            714 RELIMATE CONNECTOR

            7141 WORKING

            These are wire to board type connectors used to facilitate

            proper and firm electrical connection between the relay card and

            microcontroller card

            The connector has following specifications

            No of Ways 2-20

            Voltage Rating 250V AC DC

            Current Rating 3A AC DC

            Contact Resistance 20mW max

            Insulation Resistance 1000MW min

            Dielectric Withstanding 1000V ACminute

            Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

            The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

            connector is it provides a fast and easy connection and disconnection it also avoids polarity

            conflicts

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            715 RS-232 PORT CONNECTOR

            7151 WORKING

            Almost all digital devices which we use require either TTL

            or CMOS logic levels Therefore the first step to connecting a

            device to the RS-232 port is to transform the RS-232 levels back

            into 0 and 5 Volts This is done by RS-232 Level Converters

            Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

            Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

            The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

            problem in many instances where only a single supply of +5V is present

            CHAPTER 8

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            IMPLIMENTATION

            OF THE PCB

            Components layout designing

            Developing or Etching the PCB

            Other operations like Drilling Cutting Tinning

            81 IMPLIMENTATION OF THE PCB

            A proper PCB ensure that various circuit components are interconnected as per the

            circuit diagram once they have been placed on the PCB in their proper positions and

            subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

            base material to which is permanently attached a flat metallic network of conducting path

            whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

            for this project is single one

            The basic material used may be resin coated paper fiber glass ceramic and the flat

            board configuration however is most widely used and it may be of the nature of the single

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

            which ensures adequate and permanent low resistance coupling

            811 BOARD DESIGN

            PCB designed is the most important and requires great care during work In this case

            great care must be taken while tracing the circuit or layout on the board Because once PCB

            is designed it is virtually impossible to alter it While designing a circuit designer should

            take care to avoid crossing of conducting path (tracks) as possible Crossover are

            unavoidable then only of the jumper can be used A circuit board carrying on both sides can

            also help to solve this problem when circuit is complicated

            812 THE MASTER DIAGRAM

            The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

            which is commonly made twice as the finished circuit since this makes the working on that

            much easier especially when circuit is complicated photography eventually reduces the

            size of diagram to that of the circuit before proceeding we must know some rules regarding

            the designing -

            a The space between the conductors must be strictly controlled to avoid the possibility

            of electrical discharges or unwanted capacitance The amount by which the mater

            diagram is to reduce in size is thus a critical deign feature

            b The conductor must be wider in those part of the circuits that are going to handle

            large current must be handle without undue temperature of conductors

            c The minimum width of copper should not generally be less than about 15mmThis

            is related to mechanical strength rather than electrical properties and it also ensure

            that strips remains securely bounded to the base material

            d The points where the component holes for component lead wire occurs must be sited

            to suit the dimensions of the component and dimensions between lead-out wire so

            that the components can be situated correctly on finished board The conductor is

            also main large at the point of holes

            813 PCB MAKING

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            When the mater diagram probable twice the size of real PCB has been evolved the

            test major step consists of etching or dissolving the unwanted metal from copper claded

            board to create a circuit as depicted by master diagram It must be stressed that very

            accurate checking master is essential at this stage Then the master point is mounted on a

            special frame on easy facing of a larger camera and with the aid of the very powerful

            illumination a master diagram is clearly photographed on a glass sensitive plate This is

            developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

            brought into operation This comprises the camera body mounted so that sideways after

            each exposure In this way number of copies of the original master diagram is set out

            exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

            In case of simple and need of number of less PCB economic and advisable to use the

            following lab method of PCB making

            Planning The Circuit

            It is not a particular difficult There are several important factors that need not be

            taken into account if the finished device is to work properly we must consider gain factor

            and ensure that the input and output parts are sufficiently well isolated to avoid the

            possibility We must also ensure that conductors and components carrying high frequency

            current are well separated from the part of the circuit We are also to make sure that all

            components need to return to earth are properly connected and that possibility of common

            impedance arising earth returned

            Circuit is totally eliminated by making all earth as substantial possible consistent

            with nature of design Other factors that have to successfully studied include availability of

            adequate return points on board and itrsquos mounting from accessibility of switch connection

            made for mechanical fixing ventilation effect of vibration

            Cleaning The Board

            The copper side of the board must be thoroughly cleaned before circuit plan is

            transferred to it This is important because even slightest trace of graze (from figure of

            instance) will impure the etching process and when the circuit plan has been neatly

            transferred to copper in this manner the board is held under running tap and the allowed to

            dry before resist is applied

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Transforming the Plan

            Now once cleaning is done plan has to transfer on copper surface of PCB material

            A convenient way to do this is simply put the carbon paper between a copper surface of the

            board and working plan and carefully trace the lines of original plan with a ball pen

            Resist

            Resist is nothing more than a substrate that is unaffected by presence etching

            chemicals It is usually colored so that it can be easily seen the copper surface when plan is

            clearly worked on clean copper that are to be left in fact as the copper conductor must be

            covered when resists the leaguer type of paints possess good resist properties but

            disadvantage of relatively long time taken for drying It is essential to resist through

            hardening before etching is started Nail polished are better as they quickly and are less

            difficult to remove

            To overcome this drying effect and to achieve the sharp edge of the trace on the

            PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

            short circulating due to paints are completely the avoid etching tapes and pads are available

            in different sizes

            Correcting Error

            When a result has been thoroughly hardened any errors that have been made can

            usually be corrected by gently scratching away with knife To ensure clear out lines round

            edges of copper conductors on board the resist must be applied with steady band

            Etching

            Next comes etching of unwanted copper amp whether a small single is all that is

            required as quantity of board to be produce certain precautions must be taken before

            operation is commenced the most used etch amp I ferrite chloride to this is added small

            quantity of HCL to accelerate But not critical as lab construction concerned A good

            etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

            grams of water

            Agitation

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

            the etchant process The depth of liquid must be sufficient to completely cover laminate the

            laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

            gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

            temperature and thickness of copper foil

            Finishing Off

            When all unwanted copper is dissolved from areas between conductor board should

            be taken from an etchant amp washed in water The resist must be removed using proper

            solvent After this the copper surface must be polished with any kind of cleaner It should be

            seen that there is no slight incomplete etching between the conducting parts of the PCB The

            PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

            This process is called Tinning This process of coating involve track with soldier

            Advantage of tinning the effect of environment of conductors then PCB is drilled

            ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

            Assembling On PCB

            After the holes are drilled the component have to be assembled on PCB before

            assembling the components it is necessary to clean soldering iron in order to get easy amp

            accurate soldering Removing impurity particles that are gathered on iron bit due to

            repetitive use cleans soldering iron

            CHAPTER 9

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            SOLDERING

            TECHNIQUE

            Technique for good soldering

            91 SOLDERING TECHNIQUE

            For soldering of any joints first the terminal to be soldered are cleaned to remove

            oxide film or dirt on it If required flux is applied on the points to be soldered

            Now the joint to be soldered is heated with the help of soldering iron Heat

            applied should be such that when solder wire is touched to joint it must melt

            quickly

            The joint and the soldering iron is held such that molten solder should flow

            smoothly over the joint

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            When joint is completely covered with molten solder the soldering iron is re-

            moved

            The joint is allowed to cool without any movement

            The bright shining solder indicates good soldering

            In case of dry solder joint a air gap remains in between the solder material and

            the joint It means that soldering is improper This is removed and again solder-

            ing is done

            Thus this way all the components are soldered on P C B

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 10

            PCB LAYOUTS

            Schematic diagram

            Bottom and top layout

            101 POWER SUPPLY CARD

            1011 SCHIMETIC DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1012 LEGEND MARKING

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

            Fig1011 Schematic diagram of power supply card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1013TOP LAYER

            1014 BOTTOM LAYER

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

            Fig1013 Top layer of power supply

            card

            Fig1014 Schematic diagram of power supply card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            102 BATTERY CHARGER CARD

            1021 SCHEMATIC DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

            Fig1021 Schematic diagram of battery charger card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            103 RELAY CARD

            1031 SCHIMETIC DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

            Fig1031 Schematic diagram of Relay card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1032 RELAY CARD LEGEND MARKING

            1033 TOP LAYER

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

            Fig1032 Legend marking of Relay card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1034 BOTTOM LAYER

            104 MICROCONTROLER CARD

            1041 SCHIMETIC DIAGRAM

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

            Fig1034 Bottom layer of Relay card

            Fig1041 Schematic diagram of microcontroller card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1042 ALL LAYERS

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

            Fig1042 All layer of microcontroller card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 11

            INTRODUCTION

            OF SOFTWARE

            Keil (microVision 2)

            Eagle (Easily Applicable Graphical Layout Editor)

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            111 Keil (microVision 2)

            1111 Introduction to C51 Cross Compiler

            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

            generate fast compact code for the 8051 microcontroller family The C51 Compiler

            generates object code that matches the efficiency and speed of assembly programming

            Using a high-level language like C has many advantages over assembly language

            programming

            Knowledge of the processor instruction set is not required Rudimentary knowledge of

            the memory structure of the 8051 CPU is desirable (but not necessary)

            Details like register allocation and addressing of the various memory types and data

            types is managed by the compiler

            Programs get a formal structure (which is imposed by the C programming language) and

            can be divided into separate functions This contributes to source code reusability as

            well as better overall application structure

            The ability to combine variable selection with specific operations improves program

            readability

            Keywords and operational functions that more nearly resemble the human thought

            process may be used

            Programming and program test time is drastically reduced

            The C run-time library contains many standard routines such as formatted output

            numeric conversions and floating-point arithmetic

            Existing program parts can be more easily included into new programs because of

            modular program construction techniques

            The language C is a very portable language (based on the ANSI standard) that enjoys

            wide popular support and is easily obtained for most systems Existing program

            investments can be quickly adapted to other processors as needed

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1112 Software Development Cycle in Keil

            When we use the Keil Software tools the

            project development cycle is roughly the same as

            it is for any other software development project

            1 Create a project select the target chip from the

            device database and configure the tool settings

            2 Create source files in C or assembly

            3 Build your application with the project

            manager

            4 Correct errors in source files

            5 Test the linked application A block diagram of

            the complete 8051 tool set may best illustrate the

            development cycle

            112 Eagle (Easily Applicable Graphical Layout Editor)

            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

            printed circuit boards (PCBs) It is a complete platform for the development of any type of

            complicated amp sophisticated multilayered PCBs This software consist of the following tool

            1121 Schematic Editor

            In this one can develop amp design circuits for the required PCB

            1122 Layout Editor

            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

            Fig 111 Software development in KEIL

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1123 Library Editor

            This is very useful in case of customized component design that does not occur in the predefined library according to our need

            1124 Auto Router

            This is an artificial intelligence based tool or subroutine that can do auto routing of

            the PCB tracks designed

            1125 Cam Processor

            This is used to finally print the various layers of the designed PCB viz Top Layer

            Bottom Layer Component Layer Masking Layer etc

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

            Start

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 12

            INTRODUCTION

            OF

            PROGRAMMING

            Flowchart of programming

            Program code

            121 Flowchart

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

            2

            flag9==1

            flag9=1

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

            flag11==1

            flag11=1 flag11=0 flag4=0

            REady_LED4=0

            Sw2_op (P01) ==0

            My delay (10)

            3 3

            flag2=1 disp2=1 k2=0

            3

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

            4

            flag11==1

            flag11=0 flag4=0 REady_LED4=0

            flag11=1

            My delay (10)

            flag3=1 disp3=1 k3=0

            k1==0||k2==0||k4==0

            Sw3_op (P02) ==0

            5

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

            flag5==1

            5

            flag11==1

            flag7=1

            flag7==1

            flag7=0 flag2=0 REady_LED2=0

            6

            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

            flag11=0 flag4=0 REady_LED4=0

            flag11=1

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

            6

            My delay (10)

            flag4=1 disp4=1 k4=0

            k1==0||k2==0||k3==0 flag5==1

            7

            Sw4_op (P03) ==0

            flag5=1 flag5=0 flag1=0 REady_LED1=0

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

            7

            flag7==1

            flag9==1

            flag7=1

            flag7=0 flag2=0 REady_LED2=0

            flag9=0 flag3=0 REady_LED3=0

            flag9=1

            Sw5_op A(P04) ==0

            My delay (10)

            8

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

            9

            flag2==1

            flag3==1

            8

            flag1==1

            flag4==1 flag5=1 disp5=1

            flag9=1 disp5=1

            flag7=1 disp5=1

            flag11=1 disp5=1

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

            Sw6_op (P05) ==0

            My delay (10)

            flag2==1 ampamp flag7==1

            flag3==1 ampamp flag9==1 9

            flag1==1 ampamp flag5==1 flag6=1 disp6=1

            flag8=1 disp6=1

            10

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

            10

            flag4==1 ampamp flag11==1

            flag10=1 disp6=1

            flag12=1 disp6=1

            flag8==1

            flag10==1

            11

            flag6==1

            i++

            l++

            j++

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

            flag12==1

            M++

            11

            Stop

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            122 Program

            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

            define buzzerP2_0 buzzer indication

            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

            sbit sw5_op=P0^4 input switch5 for coin

            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

            output Led for indication

            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

            function prototype declaration

            void my_delay(unsigned int value) DELAY FUCTION

            void init_timer() timer 0 initialization function

            variable declaration

            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            start of main programme

            void main()

            init_timer() call it timer initialization function

            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

            start of while loop

            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

            condition for switch1

            if(flag1==1) check swich1 pressed if(disp1==1 )

            REady_LED1=1 turn on Ready indication of led 1 disp1=0

            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

            if(iltk) loop will repeat for desired time of charging

            if(igt=1000)

            buzzer=1 turn on buzzer if (ii==20)

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            REady_LED1=1 turn on ready indication of led1

            else if(ii==40)

            REady_LED1=0ii=0

            elseREady_LED1=0

            START_LED1=1

            else

            START_LED1=0

            k1=1 buzzer=0

            REady_LED1=0 flag1=0

            flag5=0flag6=0

            condition for switch2

            if(flag2==1) check swich2 pressed if(disp2==1)

            REady_LED2=1 turn on ready 2 led indication

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            disp2=0

            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

            if(jltk)

            if(jgt1000) buzzer=1 if(jj==20)

            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

            elseREady_LED2=0

            START_LED2=1

            else START_LED2=0

            REady_LED2=0 k2=1 buzzer=0

            flag2=0flag7=0flag8=0

            j=0jj=0

            condition for switch 3

            if(flag3==1) check swich3 pressed

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            if(disp3==1 )

            REady_LED3=1 disp3=0

            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

            if(lltk)

            if(lgt1000) buzzer=1 if(ll==20)

            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

            elseREady_LED3=0

            START_LED3=1

            else START_LED3=0

            LED2=0 k3=1 buzzer=0

            REady_LED3=0 flag3=0

            flag9=0flag10=0

            l=0ll=0

            condition for switch 4

            if(flag4==1) check swich4 pressed if(disp4==1 )

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            REady_LED4=1 disp4=0

            if(flag11==1) check coin is pressed

            if(flag12==1) START is pressed

            if(mltk)

            if(mgt1000)

            buzzer=1 if(mm==20)

            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

            elseREady_LED4=0

            START_LED4=1

            else START_LED4=0

            buzzer=0 k4=1

            REady_LED4=0 flag4=0

            flag11=0flag12=0

            m=0mm=0

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            while(1)

            end of main programme

            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

            whenever specific time the interrupt will generate control will go in following function

            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if(sw1_op==0 ) ready switch flag for system1

            my_delay(10) CALL DELAY FUNCTION

            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

            if(flag7==1) SET THE FLAG

            flag7=1

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

            flag9=1

            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

            flag11=1

            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if(sw2_op==0 ) fready switch flag for system2

            my_delay (10)

            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

            if(flag5==1)

            flag5=1

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

            flag9=1

            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

            flag11=1

            elseflag11=0flag4=0REady_LED4=0

            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

            if(flag7==1)

            flag7=1

            else

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            flag7=0flag2=0REady_LED2=0 if(flag5==1)

            flag5=1

            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

            flag11=1

            elseflag11=0flag4=0REady_LED4=0

            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

            if(flag7==1)

            flag7=1

            elseflag7=0

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            flag2=0REady_LED2=0 if(flag5==1)

            flag5=1

            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

            flag9=1

            elseflag9=0flag3=0REady_LED3=0

            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            disp5=1 if(flag4==1 ) flag11=1 disp5=1

            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

            if(flag6==1)

            i++ if (igt1000) ii++

            if (flag8==1)

            j++ if(jgt1000) jj++

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            if (flag10==1)

            l++ if (lgt1000) ll++

            if (flag12==1)

            m++ if (mgt1000) mm++

            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 13

            TROUBLE SHOOT

            Troubleshoot

            131 TROUBLE SHOOT

            A newly assembled circuit does not work may be due to -

            Faulty components

            Improper soldering

            Wrong connections

            Also any stop in working after some period may be due to -

            Component failure

            Supply failure

            Damaging of PCB

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Fault finding is very essential if you want the circuit to operate properly

            If a newly assembled circuit is not working properly check all the components and

            circuit connections according to the diagram The circuit may not be working due to wrong

            polarity of capacitor diode and wrong supply terminal connection Most of the times the

            circuit does not work due to bad soldering Therefore proper procedure is followed to have

            proper soldering

            If faults are not observed during physical observations one should proceed for Hot

            test ie Voltage measurement at different points for example at Input terminal etc

            Resistance measurement is also done which is known as Dry test

            During this project work some green LEDs was not glow then we checked it

            continuity and replace it

            Also relay was not properly worked therefore we replaced it Some ICs was get

            heated after starting the project It happens because of some soldering points are shorted

            during soldering PCB We solved that problem

            CHAPTER 14

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            ADVANTAGES OF

            THE PROJECT

            Advantages

            141 ADVANTAGES OF THE PROJECT

            Simple and hand efficient Microcontroller based system

            Fast charging capacity

            Simple to operate

            Ease of mobility

            Facilitates connectivity for 90 of cellular phones

            Less expensive

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Reduced man power

            Low power consumption

            It can offer emergency charging for 4sets of handsets synchronously

            CHAPTER 15

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            DISADVANTAGES

            OF THE PROJECT

            Disadvantages

            151 DISADVANTAGES OF THE PROJECT

            It requires mains supply to work project

            Due to limited charging channels till now there may be a possibility that

            mobile phones of few brands cannot be connected for charging For this

            purpose we have to use separate connectors for that specific brand differently

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

            min

            It does not have battery backup therefore it cannot be portable

            CHAPTER 16

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            APPLICATIONS OF

            THE PROJECT

            Application

            161 APPLICATIONS OF THE PROJECT

            The coin based mobile phone charger is very useful to public for using coin to

            charge for the mobile phone in any places

            It is used for emergency charging purposes

            It can be installed in malls railway stations bus stops and other public

            places

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            The charger offers a unique revenue opportunity for a vast range of

            businesses - from airports to pubs from universities to health clubs virtually

            any location where there is a high footfall creating a large number of

            potential users

            It can be installed in offices and collages for pay charging facility

            CHAPTER 17

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            FUTURE

            DEVELOPMENT OF

            THE PROJECT

            FUTURE DEVELOPMENT OF THE PROJECT

            171 FUTURE DEVELOPMENTOFTHE PROJECT

            This project is very useful to people who are using mobile phone without charging

            condition in public places

            It will use with a stereo advertisement carrier that can display video advertisement

            It will provide battery backup for make it portable

            It will also provide SMS system in future

            We can also increase the charging time by editing software of the project

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 18

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            COST ANALYSIS

            OF THE PROJECT

            COST ANALYSIS OF THE PROJECT

            181 COST ANALYSIS OF THE PROJECT

            1811 Component list for power supply card

            Footprint Quantity Designators Rate

            Resistor

            22K 1 R2 1

            1K 1 R1 1

            Capacitor

            1000uf25V 1 C5 10

            2200uf25V 1 C1 10

            022uf 2 C6 C2 1

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

            Table 1811 Component list for power supply card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            01uf 2 C4 C3 1

            IC

            BRIDGE W10 2 BR2 BR1 10

            L7812CV (TO-220) 1 U2 8

            L7805CV (TO-220) 1 U1 8

            Connector

            CON PHO 2PIN 2 J3 J2 16

            CON PHO 3PIN 1 J1 12

            LED3mm red 2 L1 L2 15

            Heat sink (TO-220) 2 16

            Total 955

            1812 Component list for battery charger card

            Footprint Quantity Rate

            Capacitor

            2200uf25V 1 1000

            022uf 4 100

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            01uf 4 100

            IC

            BRIDGE W10 1 500

            L7805CV (TO-220) 4 3200

            Connector

            CON PHO 2PIN 1 800

            Relimate 2 pin 1 400

            relimate 3 pin 4 2000

            Heat sink (TO-220) 4 1200

            TOTAL 9300

            1813 Component list for Relay card

            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

            Table 1812Component list for battery charger card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            RELIM-4 1 J1 700 16 pin ic socket 1 400

            Total 18900

            1814Component list for controller card

            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

            Table 1813Component list for relay card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

            total 27000

            1815 Miscellaneous material

            Material Quantity Rate

            electronic item

            Transformer

            TXR1 0-9-15 1 20000

            0-9 1A

            0-15 100mA

            TXR2 0-9 1 16500

            0-9 1A

            Proximity switch 1 20000

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

            Table 1814Component list for microcontroller card

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Red push bottom 4 4000

            Green push button 1 1000

            Red led 5mm 4 800

            Green led 5mm 4 800

            Led holder 8 1600

            Copper clad 2 4000

            3 core cable 1 meter 1500

            3 pin plug 1 3000

            2 pin relimate wire 19 9000

            3 pin relimate wire 5 3750

            4 pin relimate wire 2 2000

            mechanical items

            Enclosure 1 25000

            Acrylic sheet 2 X 1 30000

            12mm cable gland 1 1000

            Screw 3mm 33 2000

            Screw 35mm 6 2400

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            10 mm spacers 100 1500

            10mm insert to stud 50 10000

            cable tie 2500

            Total 162350

            CHAPTER 19

            APPENDIX

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

            Table 1815Component list for miscellaneous material

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            APPENDIX

            191 APPENDIX

            1911 78xx IC datasheet

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1912 W10 datasheet

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1913 4n33 IC datasheet

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

            1914 MAX 232

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1915 ULN2003a IC datasheet

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            1916 89V51RD2 IC datasheet

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 20

            CONCLUSION

            CONCLUSION

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            201 CONCLUSION

            The coin-operated mobile phone charger is already successfully installed in

            hundreds of locations worldwide providing a unique service to the public and a source of

            revenue for site providers The coin-operated mobile charger can be quickly and easily

            installed in any business premises

            The charger offers a unique revenue opportunity for a vast range of businesses ndash

            from airports to pubs from universities to health clubs virtually any location where there is

            a high footfall creating a large number of potential users

            The charger can charge up to 4 different mobile phones simultaneously It will

            extend low mobile phone talk time provide battery charging

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 21

            IMAGES OF THE

            PROJECT

            Images of the project

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            211 IMAGES OF THE PROJECT

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

            fig211 lsquoCoin operated mobile battery charger

            Fig212 Circuit arrangement of coin operated mobile battery charger

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Fig 216 Relay driver circuit

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

            Fig 213 Constant voltage battery charger circuit

            Fig214 Power supply circuit

            Fig215 Metal detector proximity switch

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Fig217 Microcontroller circuit

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            Fig228 coin operated mobile battery charger project presentation

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            CHAPTER 22

            BIBILOGRAPHY

            BIBLIOGRAPHY

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

            221 BIBLIOGRAPHY

            BOOKS

            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

            INTERNET LINKS

            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

            • CHAPTER 1

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              31 DEVELOPMENT STAGES amp PROCESS

              The complete development of this project can be divided into the following stages

              Problem definition stage

              Designing block diagram

              Implementing circuits and components

              Developing algorithm for software

              Writing actual code for Microcontroller

              Compiling the code

              Burning the hex file into microcontroller with programmer

              Testing and Running

              311 Problem definition stage

              This is the very first stage to develop any project It actually defines the aim

              and the concept of the project At inconvenient times when access to a standard

              charger isnt possible The aim of ldquoEmergency coin operated mobile chargerrdquo is

              designed to solve this problem The charger operates like a vending machine all a

              user has to do is plug the mobile phone into one of the four adapters and insert a

              coin the phone will then be given a micro-pulse fast charge in just 10 minutes

              312 Designing block diagram

              At this stage we have categorized the whole system into different individual

              modules These modules (block diagrams) will be helpful in understanding the

              concept and working of the integrated system It also simplifies the entire debugging

              and testing process

              313 Implementing circuits and components

              This is the actual implementation of circuit of each block At this stage we

              have actually designed each block separately and finally integrated them into the

              complete working system

              314 Developing for software

              To get the logical flow of the software the development of algorithm having

              a prominent role So that we have to analyze the complete system and organized the

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 7

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              algorithm in such a manner that one can understand the complete working of the

              software

              315 Writing actual code for Microcontroller

              After the development of the algorithm and flowchart we have actually

              translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

              that it can understand the instructions and run as per our requirement The

              instructions are in ANSII C Language

              316 Compiling the code

              The hand written code on paper was then transferred into computer For that

              we have used Keil pre-install on PC The Keil is a Computer Aided Program to

              simulate the working of Microcontroller in real time without burning the software

              into actual IC We simulated and compiled our program for error checking After

              removing several compiling errors the program was converted into machine language

              ie Philips hex format

              317 Burning the hex file into microcontroller with Programmer

              In this stage the compiled hex format file was downloaded or burned into

              flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

              system programming software provided by the manufacturer itself

              318 Testing and Running

              This time we tested our project for actual working after loading the Software

              into the microcontroller Any errors found were removed successfully This is the last

              and final stage of development of our project

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 4

              BLOCK DIAGRAM

              OF THE PROJECT

              Block Diagram Brief Explanation

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              41 Block Diagram

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

              Fig 41 Block diagram of the project

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              42 Brief Explanation

              421 POWER SUPPLY

              Power supply is used to deliver power to the circuit It delivers +5Vdc to

              microcontroller and other peripherals and +12Vdc delivers power to relay

              422 COIN INPUT AND LEVEL CONVERTOR

              Coin input is a sensor which senses a metal and produces an output voltage This

              voltage is high as compared to the input required for microcontroller

              Hence a level shifter is used to bring down the voltage level which could be

              readable to microcontroller

              423 START SWITCH

              Start switch is used to start the charging process of a

              mobile phone

              424 RS232 INTERFACING TO PC

              RS 232 is a protocol used for communication between

              computer and microcontroller It is also used for

              programming the microcontroller in its ISP (in system

              programming) mode

              425 CHANNEL READY INDICATOR

              It provides visual indication for the channel which is in

              charging mode

              426 DARLINGTON PAIR ARRAY

              Darlington pair array is used as a relay driver

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              427 CHANNEL IN CHARGE INDICATION

              It provides visual indication for the channel which is in

              charging mode

              428 RELAY ARRAY

              Relay array consists of relays for each channel to

              provide electromechanical switching in between charger and

              mobile phone

              429 CHARGER ARRAY

              Charger array is used to provide charging power to the

              mobile phones through the electromechanical switches

              4210 CELL PHONE TO CHARGE

              Channel select switch is used for selecting a channel on

              which the mobile phone is to be charged

              4211 MICROCONTROLLER

              Microcontroller is used to control the whole operation of

              the device Microcontroller reads input signal from input

              device and triggers the output device According to the

              conditions defined in the microcontroller by the programmer

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 5

              CIRCUIT

              DIAGRAM

              EXPLANATION

              Circuit diagram

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Circuit diagram explanation Working

              51 POWER SUPPLY CIRCUIT

              511 CIRCUIT DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

              Fig51 Circuit diagram of the power supply

              Bridge RectifierTRANSFORMER

              Filter Voltage regulator Load

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              512 WORKING

              Transformer

              A step-down transformer is used to achieve our requirements of the power

              supply It steps down high voltage ac mains to low voltage ac mains

              Bridge Rectifier

              A bridge rectifier makes use four diodes in a bridge arrangement to achieve

              full wave rectification This is a widely used configuration both with individual

              diodes wired and with single component bridges where the diode bridge is wired

              internally It also converts ac to dc but the dc output is varying

              One advantage of a bridge rectifier over a conventional full-wave rectifier is

              that with a given transformer the bridge rectifier produces a voltage output that is

              nearly twice that of the conventional full-wave circuit

              Filter

              The output of the rectifier is a pulsating dc wave We need a constant dc

              output To do this we need to filter out the oscillation from the pulsating dc wave

              This is obtained with a diode capacitor combination

              Voltage Regulator

              A voltage regulator is used for voltage regulation in the circuit This provides

              a protection to the circuits in the case of fluctuations It eliminates ripples by setting

              dc output to fixed voltages

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

              Fig 52 Block diagram of the power supply

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Load

              The load can be anything which wants to switch ON by using power supply

              513 CIRCUIT DIAGRAM EXPLANATION

              Regulated power supplies are commonly used in engineering projects Power

              supply is food of any circuit

              +5V SUPPLY UNIT

              +5V supply is obtained from the +5V supply unit for microcontroller and

              digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

              transformer having a capacity of 500mA

              Since the input voltage to the regulator IC should be more than its output

              voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

              of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

              smooth DC supply The rating of the chosen capacitor filter is 1000microF

              The regulated DC voltage is obtained by using a regulator IC 7805 In the

              case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

              Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

              output of regulator IC to eliminate the voltage oscillations at the output due to the large

              voltage oscillations at the input of the regulator

              +12V SUPPLY UNIT

              The plusmn12 V supply required by the relay is provided by the 12V supply circuit

              arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

              step down transformer having a capacity of 1A and the center tap of the transformer is

              grounded This low voltage is rectified with the help off bridge rectifier

              Since the input voltage to the regulator IC should be more than its output

              voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

              the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

              filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

              For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

              7912 is used

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

              the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

              connected at the output as shown in figure to eliminate the voltage oscillations at the

              output due to the large voltage oscillations at the input of the regulator

              52 CONSTANT VOLTAGE CHARGER

              521 CIRCUIT DIAGRAM

              Fig 53 Circuit diagram of the battery charger

              522 CIRCUIT DIAGRAM EXPLANATION

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Constant-voltage (often called constant-potential) chargers maintain nearly the same

              voltage input to the battery throughout the charging process regardless of the batterys state

              of charge Constant-voltage chargers provide a high initial current to the battery because of

              the greater potential difference between the battery and charger

              A constant-voltage charger may return as much as 70 of the previous discharge in

              the first 30 minutes This proves useful in many battery applications involving multiple

              discharge scenarios As the battery charges its voltage increases quickly This reduces the

              potential that has been driving the current with a corresponding rapid decrease in charge

              current as depicted in the illustration below As a result even though the battery reaches

              partial charge quickly obtaining a full charge requires prolonged charging

              Given this behavior constant-voltage chargers are frequently found in applications

              that normally allow extended charging periods to attain full charge Constant-voltage

              chargers should not be used where there is frequent cycling of the battery Repeated

              discharges without returning the cell to its full charge will eventually decrease the battery

              capacity and may damage individual cells

              Fig 54An Illustration graph of the charging function of constant battery charger

              Constant-voltage chargers are most often used in two very different modes as a fast

              charger to restore a high percentage of charge in a short time or as a float charger to

              minimize the effects of overcharge on batteries having infrequent discharges

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              53 RELAY DRIVER CIRCUIT

              531 CIRCUIT DIAGRAM

              532 CIRCUIT DIAGRAM EXPLANATION

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

              Fig 55 Relay driver circuit

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Input from the controller is connected to the relay card through connector J1 which

              carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

              pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

              These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

              relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

              series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

              and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

              relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

              NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

              3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

              RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

              is used to connect power supply to relay card

              533 WORKING

              While taking Relay1 (RL1) into consideration we will discuss the working of relay

              card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

              of the IC are in cut off region which causes an open circuit so there is no current flow

              flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

              applied to the two pin1 of IC U1 the internal transistor goes in to active region and

              completes the path ie provide ground to the relay coil so the current flows through the

              LED activating the relay

              As the current flows through the relay coil it gets energized and switch over the

              contacts ie common and normally open contact get connected and provide a path to flow

              current from J11 ie charger into the load connected at J4 hence the cell phone charging

              process starts The same above process is applies for all relays If LED is fused or

              damaged the path will be open and relay will not be energized and if relay is damaged the

              led will not be illuminated So the LED here is used as a FAULT indicator and a

              CHARGING ON indicator

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              54 MICROCONTORLLER CIRCUIT

              541 CIRCUIT DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              542 CIRCUIT DIAGRAM EXPLANATION

              CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

              the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

              port P04 through J4 and START switch is connected to port P05 through SW5

              Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

              P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

              Output for relay card is taken on port P14 to P17

              Components C1 R1 and push button S1 forms reset circuit which provides a power

              on reset for the micro controller and even provide manual reset Crystal XL1 is a

              110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

              22pf capacitor used as loading capacitor for crystal

              Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

              RN2 resistance network

              IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

              the proximity switch and microcontroller and convert its output readable to microcontroller

              IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

              communication between PC and a microcontroller through connector J3

              Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

              communication process

              Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

              power supply connection

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              543 PORT ASSIGNMENTS FOR 89V51RD2FN

              P00 = switch1 for channel 1

              P01 = switch2 for channel 2

              P02 = switch3 for channel 3

              P03 = switch4 for channel 4

              P04 = switch5 for coin input sensor (proximity switch)

              P05 = switch6 for start charging

              P10 = channel 1 red LED1 (ready system)

              P11 = channel 2 red LED2 (ready system2)

              P12 = channel 3 red LED3 (ready system3)

              P13 = channel 4 red LED4 (ready system4)

              P14 = channel 1 relay (start system1)

              P15 = channel 2 relay (start system2)

              P16 = channel 3 relay (start system3)

              P17 = channel 4 relay (start system4)

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 6

              LIST OF THE

              COMPONENTS

              List of the components

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              61 LIST OF THE COMPONETS

              RESISTORS

              CAPACITORS

              LIGHT EMITING DIODES (LEDS)- Green Red

              RELAYrsquoS-

              TRANSFORMERS

              RECTIFIER BRIDGES (W 10)

              OSCILLATOR

              SWITCHES- Push switches

              DARLINGTON PAIR IC (ULN2003a)

              SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

              SERIAL COMMUNICATION DRIVER IC (MAX 232)

              OPTOCOUPLER IC (4N33)

              MICROCONTROLLER IC (89V51 RD2)

              RELIMATE CONNECTOR- 2 pin amp 4 pin

              RS-232 PORT CONNECTOR

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 7

              INTRODUCTION

              OF COMPONENTS

              Working of components

              Features or Uses of components

              Testing of components

              71 RESISTOR

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              711 WORKING

              Resistors limit current Resistors are considered to be the most used and the most

              important component of all the electronic circuits Resistors resist the flow of electrical

              current The higher the value of resistance (measured in ohms)

              the lower the current will be

              712 TESTING

              Read the indicated color code value then select the OHM-scale within but not way

              below the indicated value A resistor is good if its resistance is close to the indicated

              Tolerance should be considered with the ohmmeter reading While no resistance reading at

              all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

              ohmmeter scale settings resistor is shorted

              713 SPECIFICATIONS

              To completely specify a resistors characteristics requires knowledge of the following

              parameters-

              bull Value

              bull Tolerance

              bull Temperature Coefficient

              bull Power Rating

              The specification of a resistor may be marked on its surface using either of two

              systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

              the second more recent system uses a combination of alpha-numeric characters

              7 2 CAPACITOR

              721 WORKING

              When DC voltage is applied to the capacitor an electric charge is stored on each

              electrode While the capacitor is charging up current flows The current will stop flowing

              when the capacitor has fully charged Capacitors find use

              in circuits for a variety of purposes They are used in

              time delay generation RC circuits In power supplies for filtering and power supply

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              decoupling as blocking capacitors for power factor correction and motor starting in LC

              tank circuits and so on

              722 TESTING

              To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

              negative probe to the capacitor positive terminal the positive probe to the negative terminal

              A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

              and moves back again to infinite resistance position A defective indication for an

              electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

              which is an indication that the capacitor is shorted

              73 LIGHT EMITING DIODE (LED)

              731 WORKING

              LEDs are special diodes that emit light when

              connected in a circuit They are frequently used as pilot lights in electronic appliances to

              indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

              the heart of an LED the semi-conductor chip

              In our project Green LED are used here for mainly two purpose

              a Charging ON indication (when ON)

              b Channel fault indication (always OFF)

              732 TESTING

              The good and working LED will then light up or glow a busted LED will not LEDs

              must have a resistor in series to limit the current to a safe value for quick testing purposes a

              1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

              directly connected to a battery or power supply It will be destroyed the LED

              733 FEATURES

              Single color

              High bright output

              Low power consumption

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              High reliability and long life

              734 Descriptions

              Dice material GaInN

              Emitting Color Super Bright White

              Device Outlineφ5mm Round Type

              Lens Type Water Clear

              74 RELAY

              741 WORKING

              A relay is an electrically operated switch Current

              flowing through the coil of the relay creates a magnetic field

              which attracts a lever and changes the switch contacts The coil

              current can be on or off so relays have two switch positions and

              most have double throw (changeover) switch contacts

              Relays are like remote control switches and are used in

              many applications because of their relative simplicity long life

              and proven high reliability

              742 USES

              The main operation of a relay comes in places where only a low-power signal can be

              used to control a circuit

              It is also used in places where only one signal can be used to control a lot of circuits

              The application of relays started during the invention of telephones They played an

              important role in switching calls in telephone exchanges They were also used in

              long distance telegraphy They were used to switch the signal coming from one

              source to another destination

              743 TESTING

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              A relay will usually have a coil pole terminal and a set of

              contacts The set of contacts that are open when the relay is not

              energized are called normally open (NO) contacts and the set of

              contacts that are closed when the relay is not energized are called

              normally closed (NC) contacts The following steps can be used to perform the testing of

              the relay using a multimeter

              Keep the multimeter in the continuity check mode

              Check for continuity between the NC contacts and pole

              Check for discontinuity between NO contacts and the pole

              Now energies the relay using the rated voltage For example use a 9V battery for

              energizing a 9V relay The relay will engage with clicking sound

              Now check for continuity between NO contacts and pole

              Also check for discontinuity between NC contacts and pole

              As a final test measure the resistance of the relay coil using a multimeter and check

              whether it is matching to the value stated by the manufacturer

              If all the above tests are positive we can conclude that the relay is healthy

              75 TRANSFORMER

              751 WORKING

              A transformer is a device that transfers electrical energy

              from one circuit to another through inductively coupled

              electrical conductors A changing current in the first circuit (the

              primary) creates a changing magnetic field

              This changing magnetic field induces a changing voltage in the second circuit (the

              secondary) This effect is called mutual induction

              If a load is connected to the secondary circuit electric charge will flow in the

              secondary winding of the transformer and transfer energy from the primary circuit to the

              load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

              of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

              number of primary turns

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              By appropriate selection of the numbers of turns a transformer thus allows an

              alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

              making it less

              752 TESTING

              1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

              scale and then adjusting the knob to verify its reading is an easy step to the

              reading of the ohm

              2 To check the resistance of the coil unplug or unsolder the leads of the

              transformer from its circuit and measure the resistance of each coil

              3 The next step is to test each coil for shorts to other coils

              76 RECTIFIER BRIDGE (W 10)

              761 WORKING

              A diode bridge rectifier is a device for converting AC or

              alternating current electricity into DC or direct current AC

              electricity goes from positive to negative constantly whereas DC

              always flows in the same direction

              AC electricity is more efficient to transmit and easier to

              convert into different voltages However most appliances need DC current to run A diode

              bridge rectifier is the most common type of power supply used to provide this current In

              our project W10 is a bridge rectifier which provides on single semiconductor chip

              77 OSCILLATOR

              771 Working

              An oscillator puts out an endless series of pulses The output

              constantly goes from 0 volts to Vcc and back to 0 volts again Almost

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              all digital circuits have some type of oscillator This stream of output pulses is often

              called a clock One of the most important features of any oscillator is its frequency stability

              or in other words its ability to provide a constant frequency output under varying load

              conditions Some of the factors that affect the frequency stability of an oscillator include

              temperature variations in the load and changes in the DC power supply Frequency stability

              of the output signal can be improved by the proper selection of the components used for the

              resonant feedback circuit including the amplifier but there is a limit to the stability that can

              be obtained from normal LC and RC tank circuits

              In our project instead of 12MHz crystal 110592MHz is used because it can be

              divided to give you exact clock rates for most of the common baud rates for the UART

              especially for the higher speeds (9600 19200) These crystals are readily available and

              commonly used

              78 SWITCH

              781 WORKING

              The most familiar form of switch is a manually operated

              electromechanical device with one or more sets of electrical contacts

              Each set of contacts can be in one of two states either closed meaning

              the contacts are touching and electricity can flow between them or

              open meaning the contacts are separated and the switch is non

              conducting The mechanism actuating the transition between these two

              states (open or closed) can be either a toggle (flip switch for continuous on or off) or

              momentary (push-for on or push-for off) type

              782 USES

              In electronics a switch is an electrical component that can break an electrical

              circuit interrupting the current or diverting it from one conductor to another

              783 TESTING

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              When the switch is ON it looks and acts like a wire When the switch is OFF there is

              no connection Switch can tested by using multimeter in continuity range

              79 DARLINGTON PAIR IC (ULN2003a)

              791 WORKING

              The Darlington transistor (often called a Darlington pair) is a

              compound structure consisting of two bipolar transistors (either

              integrated or separated devices) connected in such a way that the

              current amplified by the first transistor is amplified further by the

              second one This configuration gives a much higher current gain than

              each transistor taken separately and in the case of integrated devices

              can take less space than two individual transistors because they can

              use a shared collector

              Integrated Darlington pairs come packaged singly in

              transistor-like packages or as an array of devices (usually eight) in an integrated circuit

              The Darlington transistor array used is ULN2003 Applications include relay

              drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

              drivers and logic buffers Each input of this device has a zener diode and resistor in series

              to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

              for each Darlington pair for operation directly with TTL or 5-V CMOS devices

              792 FEATURES

              The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

              transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

              with common-cathode clamp diodes for switching inductive loads The collector-current

              rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

              higher current capability

              710 SERIES VOLTAGE REGULATER IC (78XX)

              7101 WORKING

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Voltage Regulator (regulator) usually having three legs converts varying input

              voltage and produces a constant regulated output voltage They are available in a variety of

              outputs

              The most common part numbers start with the numbers 78 or 79 and finish with two

              digits indicating the output voltage The number 78 represents positive voltage and 79

              negative one The 78XX series of voltage regulators are designed for positive input

              The LM78XX series typically has the ability to drive current up to 1A For

              application requirements up to 150mA 78LXX can be used As mentioned above the

              component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

              an output leg with the regulators voltage

              As a general rule the input voltage should be limited to 2 to 3 volts above the output

              voltage The LM78XX series can handle up to 36 volts input be advised that the power

              difference between the input and output appears as heat If the input voltage is unnecessarily

              high the regulator will overheat Unless sufficient heat dissipation is provided through heat

              sinking the regulator will shut down

              711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

              7111 WORKING

              The MAX-232 It includes a Charge Pump which generates

              +10V and -10V from a single 5v supply

              This IC also includes two receivers and two transmitters in

              the same package This is handy in many cases when we only want to

              use the Transmit and Receive data Lines We dont need to use two chips one for the

              receive line and one for the transmit There are also many variations of these devices The

              large value of capacitors are not only bulky but also expensive Therefore other devices are

              available which use smaller capacitors and even some with inbuilt capacitors However the

              MAX-232 is the most common and thus we will use this RS-232 Level Converter

              Dual Charge-Pump Voltage Converter

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

              V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

              output

              712 OPTOCOUPLER IC (4N33)

              7121 WORKING

              In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

              photoMOS) is a device that uses a short optical transmission path to transfer a signal

              between elements of a circuit typically a transmitter and a receiver while keeping them

              electrically isolated mdash since the signal goes from an electrical signal to an optical signal

              back to an electrical signal electrical contact along the path is broken

              Optocouplers typically come in a small 6-pin or 8-pin IC package but are

              essentially a combination of two distinct devices an optical transmitter typically a gallium

              arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

              light-triggered diac The two are separated by a transparent barrier which blocks any

              electrical current flow between the two but does allow the passage of light

              The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

              silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

              of isolation between driving and load circuits These Optocouplers can be used to replace

              reed and mercury relays with advantages of long life high speed switching and elimination

              of magnetic field

              713 MICROCONTROLLER IC (89V51 RD 2 )

              713 WORKING

              The P89V51RD2 is an 80C51 microcontroller with 64

              kB Flash and 1024 bytes of data RAM

              A key feature of the P89V51RD2 is its X2 mode option

              The design engineer can choose to run the application with the conventional 80C51 clock

              rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              achieve twice the throughput at the same clock frequency Another way to benefit from this

              feature is to keep the same performance by reducing the clock frequency by half thus

              dramatically reducing the EMI

              The Flash program memory supports both parallel programming and in serial In-

              System Programming (ISP) Parallel programming mode offers gang-programming at high

              speed reducing programming costs and time to market ISP allows a device to be

              reprogrammed in the end product under software control The capability to fieldupdate the

              application firmware makes a wide range of applications possible The P89V51RD2 is also

              In-Application Programmable (IAP) allowing the Flash program memory to be

              reconfigured even while the application is running

              714 RELIMATE CONNECTOR

              7141 WORKING

              These are wire to board type connectors used to facilitate

              proper and firm electrical connection between the relay card and

              microcontroller card

              The connector has following specifications

              No of Ways 2-20

              Voltage Rating 250V AC DC

              Current Rating 3A AC DC

              Contact Resistance 20mW max

              Insulation Resistance 1000MW min

              Dielectric Withstanding 1000V ACminute

              Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

              The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

              connector is it provides a fast and easy connection and disconnection it also avoids polarity

              conflicts

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              715 RS-232 PORT CONNECTOR

              7151 WORKING

              Almost all digital devices which we use require either TTL

              or CMOS logic levels Therefore the first step to connecting a

              device to the RS-232 port is to transform the RS-232 levels back

              into 0 and 5 Volts This is done by RS-232 Level Converters

              Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

              Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

              The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

              problem in many instances where only a single supply of +5V is present

              CHAPTER 8

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              IMPLIMENTATION

              OF THE PCB

              Components layout designing

              Developing or Etching the PCB

              Other operations like Drilling Cutting Tinning

              81 IMPLIMENTATION OF THE PCB

              A proper PCB ensure that various circuit components are interconnected as per the

              circuit diagram once they have been placed on the PCB in their proper positions and

              subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

              base material to which is permanently attached a flat metallic network of conducting path

              whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

              for this project is single one

              The basic material used may be resin coated paper fiber glass ceramic and the flat

              board configuration however is most widely used and it may be of the nature of the single

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

              which ensures adequate and permanent low resistance coupling

              811 BOARD DESIGN

              PCB designed is the most important and requires great care during work In this case

              great care must be taken while tracing the circuit or layout on the board Because once PCB

              is designed it is virtually impossible to alter it While designing a circuit designer should

              take care to avoid crossing of conducting path (tracks) as possible Crossover are

              unavoidable then only of the jumper can be used A circuit board carrying on both sides can

              also help to solve this problem when circuit is complicated

              812 THE MASTER DIAGRAM

              The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

              which is commonly made twice as the finished circuit since this makes the working on that

              much easier especially when circuit is complicated photography eventually reduces the

              size of diagram to that of the circuit before proceeding we must know some rules regarding

              the designing -

              a The space between the conductors must be strictly controlled to avoid the possibility

              of electrical discharges or unwanted capacitance The amount by which the mater

              diagram is to reduce in size is thus a critical deign feature

              b The conductor must be wider in those part of the circuits that are going to handle

              large current must be handle without undue temperature of conductors

              c The minimum width of copper should not generally be less than about 15mmThis

              is related to mechanical strength rather than electrical properties and it also ensure

              that strips remains securely bounded to the base material

              d The points where the component holes for component lead wire occurs must be sited

              to suit the dimensions of the component and dimensions between lead-out wire so

              that the components can be situated correctly on finished board The conductor is

              also main large at the point of holes

              813 PCB MAKING

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              When the mater diagram probable twice the size of real PCB has been evolved the

              test major step consists of etching or dissolving the unwanted metal from copper claded

              board to create a circuit as depicted by master diagram It must be stressed that very

              accurate checking master is essential at this stage Then the master point is mounted on a

              special frame on easy facing of a larger camera and with the aid of the very powerful

              illumination a master diagram is clearly photographed on a glass sensitive plate This is

              developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

              brought into operation This comprises the camera body mounted so that sideways after

              each exposure In this way number of copies of the original master diagram is set out

              exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

              In case of simple and need of number of less PCB economic and advisable to use the

              following lab method of PCB making

              Planning The Circuit

              It is not a particular difficult There are several important factors that need not be

              taken into account if the finished device is to work properly we must consider gain factor

              and ensure that the input and output parts are sufficiently well isolated to avoid the

              possibility We must also ensure that conductors and components carrying high frequency

              current are well separated from the part of the circuit We are also to make sure that all

              components need to return to earth are properly connected and that possibility of common

              impedance arising earth returned

              Circuit is totally eliminated by making all earth as substantial possible consistent

              with nature of design Other factors that have to successfully studied include availability of

              adequate return points on board and itrsquos mounting from accessibility of switch connection

              made for mechanical fixing ventilation effect of vibration

              Cleaning The Board

              The copper side of the board must be thoroughly cleaned before circuit plan is

              transferred to it This is important because even slightest trace of graze (from figure of

              instance) will impure the etching process and when the circuit plan has been neatly

              transferred to copper in this manner the board is held under running tap and the allowed to

              dry before resist is applied

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Transforming the Plan

              Now once cleaning is done plan has to transfer on copper surface of PCB material

              A convenient way to do this is simply put the carbon paper between a copper surface of the

              board and working plan and carefully trace the lines of original plan with a ball pen

              Resist

              Resist is nothing more than a substrate that is unaffected by presence etching

              chemicals It is usually colored so that it can be easily seen the copper surface when plan is

              clearly worked on clean copper that are to be left in fact as the copper conductor must be

              covered when resists the leaguer type of paints possess good resist properties but

              disadvantage of relatively long time taken for drying It is essential to resist through

              hardening before etching is started Nail polished are better as they quickly and are less

              difficult to remove

              To overcome this drying effect and to achieve the sharp edge of the trace on the

              PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

              short circulating due to paints are completely the avoid etching tapes and pads are available

              in different sizes

              Correcting Error

              When a result has been thoroughly hardened any errors that have been made can

              usually be corrected by gently scratching away with knife To ensure clear out lines round

              edges of copper conductors on board the resist must be applied with steady band

              Etching

              Next comes etching of unwanted copper amp whether a small single is all that is

              required as quantity of board to be produce certain precautions must be taken before

              operation is commenced the most used etch amp I ferrite chloride to this is added small

              quantity of HCL to accelerate But not critical as lab construction concerned A good

              etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

              grams of water

              Agitation

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

              the etchant process The depth of liquid must be sufficient to completely cover laminate the

              laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

              gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

              temperature and thickness of copper foil

              Finishing Off

              When all unwanted copper is dissolved from areas between conductor board should

              be taken from an etchant amp washed in water The resist must be removed using proper

              solvent After this the copper surface must be polished with any kind of cleaner It should be

              seen that there is no slight incomplete etching between the conducting parts of the PCB The

              PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

              This process is called Tinning This process of coating involve track with soldier

              Advantage of tinning the effect of environment of conductors then PCB is drilled

              ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

              Assembling On PCB

              After the holes are drilled the component have to be assembled on PCB before

              assembling the components it is necessary to clean soldering iron in order to get easy amp

              accurate soldering Removing impurity particles that are gathered on iron bit due to

              repetitive use cleans soldering iron

              CHAPTER 9

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              SOLDERING

              TECHNIQUE

              Technique for good soldering

              91 SOLDERING TECHNIQUE

              For soldering of any joints first the terminal to be soldered are cleaned to remove

              oxide film or dirt on it If required flux is applied on the points to be soldered

              Now the joint to be soldered is heated with the help of soldering iron Heat

              applied should be such that when solder wire is touched to joint it must melt

              quickly

              The joint and the soldering iron is held such that molten solder should flow

              smoothly over the joint

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              When joint is completely covered with molten solder the soldering iron is re-

              moved

              The joint is allowed to cool without any movement

              The bright shining solder indicates good soldering

              In case of dry solder joint a air gap remains in between the solder material and

              the joint It means that soldering is improper This is removed and again solder-

              ing is done

              Thus this way all the components are soldered on P C B

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 10

              PCB LAYOUTS

              Schematic diagram

              Bottom and top layout

              101 POWER SUPPLY CARD

              1011 SCHIMETIC DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1012 LEGEND MARKING

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

              Fig1011 Schematic diagram of power supply card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1013TOP LAYER

              1014 BOTTOM LAYER

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

              Fig1013 Top layer of power supply

              card

              Fig1014 Schematic diagram of power supply card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              102 BATTERY CHARGER CARD

              1021 SCHEMATIC DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

              Fig1021 Schematic diagram of battery charger card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              103 RELAY CARD

              1031 SCHIMETIC DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

              Fig1031 Schematic diagram of Relay card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1032 RELAY CARD LEGEND MARKING

              1033 TOP LAYER

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

              Fig1032 Legend marking of Relay card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1034 BOTTOM LAYER

              104 MICROCONTROLER CARD

              1041 SCHIMETIC DIAGRAM

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

              Fig1034 Bottom layer of Relay card

              Fig1041 Schematic diagram of microcontroller card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1042 ALL LAYERS

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

              Fig1042 All layer of microcontroller card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 11

              INTRODUCTION

              OF SOFTWARE

              Keil (microVision 2)

              Eagle (Easily Applicable Graphical Layout Editor)

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              111 Keil (microVision 2)

              1111 Introduction to C51 Cross Compiler

              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

              generate fast compact code for the 8051 microcontroller family The C51 Compiler

              generates object code that matches the efficiency and speed of assembly programming

              Using a high-level language like C has many advantages over assembly language

              programming

              Knowledge of the processor instruction set is not required Rudimentary knowledge of

              the memory structure of the 8051 CPU is desirable (but not necessary)

              Details like register allocation and addressing of the various memory types and data

              types is managed by the compiler

              Programs get a formal structure (which is imposed by the C programming language) and

              can be divided into separate functions This contributes to source code reusability as

              well as better overall application structure

              The ability to combine variable selection with specific operations improves program

              readability

              Keywords and operational functions that more nearly resemble the human thought

              process may be used

              Programming and program test time is drastically reduced

              The C run-time library contains many standard routines such as formatted output

              numeric conversions and floating-point arithmetic

              Existing program parts can be more easily included into new programs because of

              modular program construction techniques

              The language C is a very portable language (based on the ANSI standard) that enjoys

              wide popular support and is easily obtained for most systems Existing program

              investments can be quickly adapted to other processors as needed

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1112 Software Development Cycle in Keil

              When we use the Keil Software tools the

              project development cycle is roughly the same as

              it is for any other software development project

              1 Create a project select the target chip from the

              device database and configure the tool settings

              2 Create source files in C or assembly

              3 Build your application with the project

              manager

              4 Correct errors in source files

              5 Test the linked application A block diagram of

              the complete 8051 tool set may best illustrate the

              development cycle

              112 Eagle (Easily Applicable Graphical Layout Editor)

              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

              printed circuit boards (PCBs) It is a complete platform for the development of any type of

              complicated amp sophisticated multilayered PCBs This software consist of the following tool

              1121 Schematic Editor

              In this one can develop amp design circuits for the required PCB

              1122 Layout Editor

              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

              Fig 111 Software development in KEIL

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1123 Library Editor

              This is very useful in case of customized component design that does not occur in the predefined library according to our need

              1124 Auto Router

              This is an artificial intelligence based tool or subroutine that can do auto routing of

              the PCB tracks designed

              1125 Cam Processor

              This is used to finally print the various layers of the designed PCB viz Top Layer

              Bottom Layer Component Layer Masking Layer etc

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

              Start

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 12

              INTRODUCTION

              OF

              PROGRAMMING

              Flowchart of programming

              Program code

              121 Flowchart

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

              2

              flag9==1

              flag9=1

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

              flag11==1

              flag11=1 flag11=0 flag4=0

              REady_LED4=0

              Sw2_op (P01) ==0

              My delay (10)

              3 3

              flag2=1 disp2=1 k2=0

              3

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

              4

              flag11==1

              flag11=0 flag4=0 REady_LED4=0

              flag11=1

              My delay (10)

              flag3=1 disp3=1 k3=0

              k1==0||k2==0||k4==0

              Sw3_op (P02) ==0

              5

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

              flag5==1

              5

              flag11==1

              flag7=1

              flag7==1

              flag7=0 flag2=0 REady_LED2=0

              6

              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

              flag11=0 flag4=0 REady_LED4=0

              flag11=1

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

              6

              My delay (10)

              flag4=1 disp4=1 k4=0

              k1==0||k2==0||k3==0 flag5==1

              7

              Sw4_op (P03) ==0

              flag5=1 flag5=0 flag1=0 REady_LED1=0

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

              7

              flag7==1

              flag9==1

              flag7=1

              flag7=0 flag2=0 REady_LED2=0

              flag9=0 flag3=0 REady_LED3=0

              flag9=1

              Sw5_op A(P04) ==0

              My delay (10)

              8

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

              9

              flag2==1

              flag3==1

              8

              flag1==1

              flag4==1 flag5=1 disp5=1

              flag9=1 disp5=1

              flag7=1 disp5=1

              flag11=1 disp5=1

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

              Sw6_op (P05) ==0

              My delay (10)

              flag2==1 ampamp flag7==1

              flag3==1 ampamp flag9==1 9

              flag1==1 ampamp flag5==1 flag6=1 disp6=1

              flag8=1 disp6=1

              10

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

              10

              flag4==1 ampamp flag11==1

              flag10=1 disp6=1

              flag12=1 disp6=1

              flag8==1

              flag10==1

              11

              flag6==1

              i++

              l++

              j++

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

              flag12==1

              M++

              11

              Stop

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              122 Program

              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

              define buzzerP2_0 buzzer indication

              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

              sbit sw5_op=P0^4 input switch5 for coin

              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

              output Led for indication

              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

              function prototype declaration

              void my_delay(unsigned int value) DELAY FUCTION

              void init_timer() timer 0 initialization function

              variable declaration

              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              start of main programme

              void main()

              init_timer() call it timer initialization function

              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

              start of while loop

              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

              condition for switch1

              if(flag1==1) check swich1 pressed if(disp1==1 )

              REady_LED1=1 turn on Ready indication of led 1 disp1=0

              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

              if(iltk) loop will repeat for desired time of charging

              if(igt=1000)

              buzzer=1 turn on buzzer if (ii==20)

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              REady_LED1=1 turn on ready indication of led1

              else if(ii==40)

              REady_LED1=0ii=0

              elseREady_LED1=0

              START_LED1=1

              else

              START_LED1=0

              k1=1 buzzer=0

              REady_LED1=0 flag1=0

              flag5=0flag6=0

              condition for switch2

              if(flag2==1) check swich2 pressed if(disp2==1)

              REady_LED2=1 turn on ready 2 led indication

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              disp2=0

              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

              if(jltk)

              if(jgt1000) buzzer=1 if(jj==20)

              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

              elseREady_LED2=0

              START_LED2=1

              else START_LED2=0

              REady_LED2=0 k2=1 buzzer=0

              flag2=0flag7=0flag8=0

              j=0jj=0

              condition for switch 3

              if(flag3==1) check swich3 pressed

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              if(disp3==1 )

              REady_LED3=1 disp3=0

              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

              if(lltk)

              if(lgt1000) buzzer=1 if(ll==20)

              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

              elseREady_LED3=0

              START_LED3=1

              else START_LED3=0

              LED2=0 k3=1 buzzer=0

              REady_LED3=0 flag3=0

              flag9=0flag10=0

              l=0ll=0

              condition for switch 4

              if(flag4==1) check swich4 pressed if(disp4==1 )

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              REady_LED4=1 disp4=0

              if(flag11==1) check coin is pressed

              if(flag12==1) START is pressed

              if(mltk)

              if(mgt1000)

              buzzer=1 if(mm==20)

              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

              elseREady_LED4=0

              START_LED4=1

              else START_LED4=0

              buzzer=0 k4=1

              REady_LED4=0 flag4=0

              flag11=0flag12=0

              m=0mm=0

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              while(1)

              end of main programme

              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

              whenever specific time the interrupt will generate control will go in following function

              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if(sw1_op==0 ) ready switch flag for system1

              my_delay(10) CALL DELAY FUNCTION

              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

              if(flag7==1) SET THE FLAG

              flag7=1

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

              flag9=1

              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

              flag11=1

              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if(sw2_op==0 ) fready switch flag for system2

              my_delay (10)

              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

              if(flag5==1)

              flag5=1

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

              flag9=1

              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

              flag11=1

              elseflag11=0flag4=0REady_LED4=0

              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

              if(flag7==1)

              flag7=1

              else

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              flag7=0flag2=0REady_LED2=0 if(flag5==1)

              flag5=1

              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

              flag11=1

              elseflag11=0flag4=0REady_LED4=0

              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

              if(flag7==1)

              flag7=1

              elseflag7=0

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              flag2=0REady_LED2=0 if(flag5==1)

              flag5=1

              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

              flag9=1

              elseflag9=0flag3=0REady_LED3=0

              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              disp5=1 if(flag4==1 ) flag11=1 disp5=1

              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

              if(flag6==1)

              i++ if (igt1000) ii++

              if (flag8==1)

              j++ if(jgt1000) jj++

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              if (flag10==1)

              l++ if (lgt1000) ll++

              if (flag12==1)

              m++ if (mgt1000) mm++

              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 13

              TROUBLE SHOOT

              Troubleshoot

              131 TROUBLE SHOOT

              A newly assembled circuit does not work may be due to -

              Faulty components

              Improper soldering

              Wrong connections

              Also any stop in working after some period may be due to -

              Component failure

              Supply failure

              Damaging of PCB

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Fault finding is very essential if you want the circuit to operate properly

              If a newly assembled circuit is not working properly check all the components and

              circuit connections according to the diagram The circuit may not be working due to wrong

              polarity of capacitor diode and wrong supply terminal connection Most of the times the

              circuit does not work due to bad soldering Therefore proper procedure is followed to have

              proper soldering

              If faults are not observed during physical observations one should proceed for Hot

              test ie Voltage measurement at different points for example at Input terminal etc

              Resistance measurement is also done which is known as Dry test

              During this project work some green LEDs was not glow then we checked it

              continuity and replace it

              Also relay was not properly worked therefore we replaced it Some ICs was get

              heated after starting the project It happens because of some soldering points are shorted

              during soldering PCB We solved that problem

              CHAPTER 14

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              ADVANTAGES OF

              THE PROJECT

              Advantages

              141 ADVANTAGES OF THE PROJECT

              Simple and hand efficient Microcontroller based system

              Fast charging capacity

              Simple to operate

              Ease of mobility

              Facilitates connectivity for 90 of cellular phones

              Less expensive

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Reduced man power

              Low power consumption

              It can offer emergency charging for 4sets of handsets synchronously

              CHAPTER 15

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              DISADVANTAGES

              OF THE PROJECT

              Disadvantages

              151 DISADVANTAGES OF THE PROJECT

              It requires mains supply to work project

              Due to limited charging channels till now there may be a possibility that

              mobile phones of few brands cannot be connected for charging For this

              purpose we have to use separate connectors for that specific brand differently

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

              min

              It does not have battery backup therefore it cannot be portable

              CHAPTER 16

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              APPLICATIONS OF

              THE PROJECT

              Application

              161 APPLICATIONS OF THE PROJECT

              The coin based mobile phone charger is very useful to public for using coin to

              charge for the mobile phone in any places

              It is used for emergency charging purposes

              It can be installed in malls railway stations bus stops and other public

              places

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              The charger offers a unique revenue opportunity for a vast range of

              businesses - from airports to pubs from universities to health clubs virtually

              any location where there is a high footfall creating a large number of

              potential users

              It can be installed in offices and collages for pay charging facility

              CHAPTER 17

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              FUTURE

              DEVELOPMENT OF

              THE PROJECT

              FUTURE DEVELOPMENT OF THE PROJECT

              171 FUTURE DEVELOPMENTOFTHE PROJECT

              This project is very useful to people who are using mobile phone without charging

              condition in public places

              It will use with a stereo advertisement carrier that can display video advertisement

              It will provide battery backup for make it portable

              It will also provide SMS system in future

              We can also increase the charging time by editing software of the project

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 18

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              COST ANALYSIS

              OF THE PROJECT

              COST ANALYSIS OF THE PROJECT

              181 COST ANALYSIS OF THE PROJECT

              1811 Component list for power supply card

              Footprint Quantity Designators Rate

              Resistor

              22K 1 R2 1

              1K 1 R1 1

              Capacitor

              1000uf25V 1 C5 10

              2200uf25V 1 C1 10

              022uf 2 C6 C2 1

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

              Table 1811 Component list for power supply card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              01uf 2 C4 C3 1

              IC

              BRIDGE W10 2 BR2 BR1 10

              L7812CV (TO-220) 1 U2 8

              L7805CV (TO-220) 1 U1 8

              Connector

              CON PHO 2PIN 2 J3 J2 16

              CON PHO 3PIN 1 J1 12

              LED3mm red 2 L1 L2 15

              Heat sink (TO-220) 2 16

              Total 955

              1812 Component list for battery charger card

              Footprint Quantity Rate

              Capacitor

              2200uf25V 1 1000

              022uf 4 100

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              01uf 4 100

              IC

              BRIDGE W10 1 500

              L7805CV (TO-220) 4 3200

              Connector

              CON PHO 2PIN 1 800

              Relimate 2 pin 1 400

              relimate 3 pin 4 2000

              Heat sink (TO-220) 4 1200

              TOTAL 9300

              1813 Component list for Relay card

              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

              Table 1812Component list for battery charger card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              RELIM-4 1 J1 700 16 pin ic socket 1 400

              Total 18900

              1814Component list for controller card

              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

              Table 1813Component list for relay card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

              total 27000

              1815 Miscellaneous material

              Material Quantity Rate

              electronic item

              Transformer

              TXR1 0-9-15 1 20000

              0-9 1A

              0-15 100mA

              TXR2 0-9 1 16500

              0-9 1A

              Proximity switch 1 20000

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

              Table 1814Component list for microcontroller card

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Red push bottom 4 4000

              Green push button 1 1000

              Red led 5mm 4 800

              Green led 5mm 4 800

              Led holder 8 1600

              Copper clad 2 4000

              3 core cable 1 meter 1500

              3 pin plug 1 3000

              2 pin relimate wire 19 9000

              3 pin relimate wire 5 3750

              4 pin relimate wire 2 2000

              mechanical items

              Enclosure 1 25000

              Acrylic sheet 2 X 1 30000

              12mm cable gland 1 1000

              Screw 3mm 33 2000

              Screw 35mm 6 2400

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              10 mm spacers 100 1500

              10mm insert to stud 50 10000

              cable tie 2500

              Total 162350

              CHAPTER 19

              APPENDIX

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

              Table 1815Component list for miscellaneous material

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              APPENDIX

              191 APPENDIX

              1911 78xx IC datasheet

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1912 W10 datasheet

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1913 4n33 IC datasheet

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

              1914 MAX 232

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1915 ULN2003a IC datasheet

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              1916 89V51RD2 IC datasheet

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 20

              CONCLUSION

              CONCLUSION

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              201 CONCLUSION

              The coin-operated mobile phone charger is already successfully installed in

              hundreds of locations worldwide providing a unique service to the public and a source of

              revenue for site providers The coin-operated mobile charger can be quickly and easily

              installed in any business premises

              The charger offers a unique revenue opportunity for a vast range of businesses ndash

              from airports to pubs from universities to health clubs virtually any location where there is

              a high footfall creating a large number of potential users

              The charger can charge up to 4 different mobile phones simultaneously It will

              extend low mobile phone talk time provide battery charging

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 21

              IMAGES OF THE

              PROJECT

              Images of the project

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              211 IMAGES OF THE PROJECT

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

              fig211 lsquoCoin operated mobile battery charger

              Fig212 Circuit arrangement of coin operated mobile battery charger

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Fig 216 Relay driver circuit

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

              Fig 213 Constant voltage battery charger circuit

              Fig214 Power supply circuit

              Fig215 Metal detector proximity switch

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Fig217 Microcontroller circuit

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              Fig228 coin operated mobile battery charger project presentation

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              CHAPTER 22

              BIBILOGRAPHY

              BIBLIOGRAPHY

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

              221 BIBLIOGRAPHY

              BOOKS

              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

              INTERNET LINKS

              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

              • CHAPTER 1

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                algorithm in such a manner that one can understand the complete working of the

                software

                315 Writing actual code for Microcontroller

                After the development of the algorithm and flowchart we have actually

                translated them in Embedded C language for Phillips p89v51RD2 Microcontroller so

                that it can understand the instructions and run as per our requirement The

                instructions are in ANSII C Language

                316 Compiling the code

                The hand written code on paper was then transferred into computer For that

                we have used Keil pre-install on PC The Keil is a Computer Aided Program to

                simulate the working of Microcontroller in real time without burning the software

                into actual IC We simulated and compiled our program for error checking After

                removing several compiling errors the program was converted into machine language

                ie Philips hex format

                317 Burning the hex file into microcontroller with Programmer

                In this stage the compiled hex format file was downloaded or burned into

                flash Phillips p89v51RD2 Microcontroller This was done by using the Philips in-

                system programming software provided by the manufacturer itself

                318 Testing and Running

                This time we tested our project for actual working after loading the Software

                into the microcontroller Any errors found were removed successfully This is the last

                and final stage of development of our project

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 8

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 4

                BLOCK DIAGRAM

                OF THE PROJECT

                Block Diagram Brief Explanation

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                41 Block Diagram

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

                Fig 41 Block diagram of the project

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                42 Brief Explanation

                421 POWER SUPPLY

                Power supply is used to deliver power to the circuit It delivers +5Vdc to

                microcontroller and other peripherals and +12Vdc delivers power to relay

                422 COIN INPUT AND LEVEL CONVERTOR

                Coin input is a sensor which senses a metal and produces an output voltage This

                voltage is high as compared to the input required for microcontroller

                Hence a level shifter is used to bring down the voltage level which could be

                readable to microcontroller

                423 START SWITCH

                Start switch is used to start the charging process of a

                mobile phone

                424 RS232 INTERFACING TO PC

                RS 232 is a protocol used for communication between

                computer and microcontroller It is also used for

                programming the microcontroller in its ISP (in system

                programming) mode

                425 CHANNEL READY INDICATOR

                It provides visual indication for the channel which is in

                charging mode

                426 DARLINGTON PAIR ARRAY

                Darlington pair array is used as a relay driver

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                427 CHANNEL IN CHARGE INDICATION

                It provides visual indication for the channel which is in

                charging mode

                428 RELAY ARRAY

                Relay array consists of relays for each channel to

                provide electromechanical switching in between charger and

                mobile phone

                429 CHARGER ARRAY

                Charger array is used to provide charging power to the

                mobile phones through the electromechanical switches

                4210 CELL PHONE TO CHARGE

                Channel select switch is used for selecting a channel on

                which the mobile phone is to be charged

                4211 MICROCONTROLLER

                Microcontroller is used to control the whole operation of

                the device Microcontroller reads input signal from input

                device and triggers the output device According to the

                conditions defined in the microcontroller by the programmer

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 5

                CIRCUIT

                DIAGRAM

                EXPLANATION

                Circuit diagram

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Circuit diagram explanation Working

                51 POWER SUPPLY CIRCUIT

                511 CIRCUIT DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                Fig51 Circuit diagram of the power supply

                Bridge RectifierTRANSFORMER

                Filter Voltage regulator Load

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                512 WORKING

                Transformer

                A step-down transformer is used to achieve our requirements of the power

                supply It steps down high voltage ac mains to low voltage ac mains

                Bridge Rectifier

                A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                full wave rectification This is a widely used configuration both with individual

                diodes wired and with single component bridges where the diode bridge is wired

                internally It also converts ac to dc but the dc output is varying

                One advantage of a bridge rectifier over a conventional full-wave rectifier is

                that with a given transformer the bridge rectifier produces a voltage output that is

                nearly twice that of the conventional full-wave circuit

                Filter

                The output of the rectifier is a pulsating dc wave We need a constant dc

                output To do this we need to filter out the oscillation from the pulsating dc wave

                This is obtained with a diode capacitor combination

                Voltage Regulator

                A voltage regulator is used for voltage regulation in the circuit This provides

                a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                dc output to fixed voltages

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                Fig 52 Block diagram of the power supply

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Load

                The load can be anything which wants to switch ON by using power supply

                513 CIRCUIT DIAGRAM EXPLANATION

                Regulated power supplies are commonly used in engineering projects Power

                supply is food of any circuit

                +5V SUPPLY UNIT

                +5V supply is obtained from the +5V supply unit for microcontroller and

                digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                transformer having a capacity of 500mA

                Since the input voltage to the regulator IC should be more than its output

                voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                smooth DC supply The rating of the chosen capacitor filter is 1000microF

                The regulated DC voltage is obtained by using a regulator IC 7805 In the

                case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                output of regulator IC to eliminate the voltage oscillations at the output due to the large

                voltage oscillations at the input of the regulator

                +12V SUPPLY UNIT

                The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                step down transformer having a capacity of 1A and the center tap of the transformer is

                grounded This low voltage is rectified with the help off bridge rectifier

                Since the input voltage to the regulator IC should be more than its output

                voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                7912 is used

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                connected at the output as shown in figure to eliminate the voltage oscillations at the

                output due to the large voltage oscillations at the input of the regulator

                52 CONSTANT VOLTAGE CHARGER

                521 CIRCUIT DIAGRAM

                Fig 53 Circuit diagram of the battery charger

                522 CIRCUIT DIAGRAM EXPLANATION

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Constant-voltage (often called constant-potential) chargers maintain nearly the same

                voltage input to the battery throughout the charging process regardless of the batterys state

                of charge Constant-voltage chargers provide a high initial current to the battery because of

                the greater potential difference between the battery and charger

                A constant-voltage charger may return as much as 70 of the previous discharge in

                the first 30 minutes This proves useful in many battery applications involving multiple

                discharge scenarios As the battery charges its voltage increases quickly This reduces the

                potential that has been driving the current with a corresponding rapid decrease in charge

                current as depicted in the illustration below As a result even though the battery reaches

                partial charge quickly obtaining a full charge requires prolonged charging

                Given this behavior constant-voltage chargers are frequently found in applications

                that normally allow extended charging periods to attain full charge Constant-voltage

                chargers should not be used where there is frequent cycling of the battery Repeated

                discharges without returning the cell to its full charge will eventually decrease the battery

                capacity and may damage individual cells

                Fig 54An Illustration graph of the charging function of constant battery charger

                Constant-voltage chargers are most often used in two very different modes as a fast

                charger to restore a high percentage of charge in a short time or as a float charger to

                minimize the effects of overcharge on batteries having infrequent discharges

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                53 RELAY DRIVER CIRCUIT

                531 CIRCUIT DIAGRAM

                532 CIRCUIT DIAGRAM EXPLANATION

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                Fig 55 Relay driver circuit

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Input from the controller is connected to the relay card through connector J1 which

                carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                is used to connect power supply to relay card

                533 WORKING

                While taking Relay1 (RL1) into consideration we will discuss the working of relay

                card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                of the IC are in cut off region which causes an open circuit so there is no current flow

                flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                completes the path ie provide ground to the relay coil so the current flows through the

                LED activating the relay

                As the current flows through the relay coil it gets energized and switch over the

                contacts ie common and normally open contact get connected and provide a path to flow

                current from J11 ie charger into the load connected at J4 hence the cell phone charging

                process starts The same above process is applies for all relays If LED is fused or

                damaged the path will be open and relay will not be energized and if relay is damaged the

                led will not be illuminated So the LED here is used as a FAULT indicator and a

                CHARGING ON indicator

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                54 MICROCONTORLLER CIRCUIT

                541 CIRCUIT DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                542 CIRCUIT DIAGRAM EXPLANATION

                CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                port P04 through J4 and START switch is connected to port P05 through SW5

                Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                Output for relay card is taken on port P14 to P17

                Components C1 R1 and push button S1 forms reset circuit which provides a power

                on reset for the micro controller and even provide manual reset Crystal XL1 is a

                110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                22pf capacitor used as loading capacitor for crystal

                Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                RN2 resistance network

                IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                the proximity switch and microcontroller and convert its output readable to microcontroller

                IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                communication between PC and a microcontroller through connector J3

                Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                communication process

                Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                power supply connection

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                543 PORT ASSIGNMENTS FOR 89V51RD2FN

                P00 = switch1 for channel 1

                P01 = switch2 for channel 2

                P02 = switch3 for channel 3

                P03 = switch4 for channel 4

                P04 = switch5 for coin input sensor (proximity switch)

                P05 = switch6 for start charging

                P10 = channel 1 red LED1 (ready system)

                P11 = channel 2 red LED2 (ready system2)

                P12 = channel 3 red LED3 (ready system3)

                P13 = channel 4 red LED4 (ready system4)

                P14 = channel 1 relay (start system1)

                P15 = channel 2 relay (start system2)

                P16 = channel 3 relay (start system3)

                P17 = channel 4 relay (start system4)

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 6

                LIST OF THE

                COMPONENTS

                List of the components

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                61 LIST OF THE COMPONETS

                RESISTORS

                CAPACITORS

                LIGHT EMITING DIODES (LEDS)- Green Red

                RELAYrsquoS-

                TRANSFORMERS

                RECTIFIER BRIDGES (W 10)

                OSCILLATOR

                SWITCHES- Push switches

                DARLINGTON PAIR IC (ULN2003a)

                SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                SERIAL COMMUNICATION DRIVER IC (MAX 232)

                OPTOCOUPLER IC (4N33)

                MICROCONTROLLER IC (89V51 RD2)

                RELIMATE CONNECTOR- 2 pin amp 4 pin

                RS-232 PORT CONNECTOR

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 7

                INTRODUCTION

                OF COMPONENTS

                Working of components

                Features or Uses of components

                Testing of components

                71 RESISTOR

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                711 WORKING

                Resistors limit current Resistors are considered to be the most used and the most

                important component of all the electronic circuits Resistors resist the flow of electrical

                current The higher the value of resistance (measured in ohms)

                the lower the current will be

                712 TESTING

                Read the indicated color code value then select the OHM-scale within but not way

                below the indicated value A resistor is good if its resistance is close to the indicated

                Tolerance should be considered with the ohmmeter reading While no resistance reading at

                all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                ohmmeter scale settings resistor is shorted

                713 SPECIFICATIONS

                To completely specify a resistors characteristics requires knowledge of the following

                parameters-

                bull Value

                bull Tolerance

                bull Temperature Coefficient

                bull Power Rating

                The specification of a resistor may be marked on its surface using either of two

                systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                the second more recent system uses a combination of alpha-numeric characters

                7 2 CAPACITOR

                721 WORKING

                When DC voltage is applied to the capacitor an electric charge is stored on each

                electrode While the capacitor is charging up current flows The current will stop flowing

                when the capacitor has fully charged Capacitors find use

                in circuits for a variety of purposes They are used in

                time delay generation RC circuits In power supplies for filtering and power supply

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                decoupling as blocking capacitors for power factor correction and motor starting in LC

                tank circuits and so on

                722 TESTING

                To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                negative probe to the capacitor positive terminal the positive probe to the negative terminal

                A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                and moves back again to infinite resistance position A defective indication for an

                electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                which is an indication that the capacitor is shorted

                73 LIGHT EMITING DIODE (LED)

                731 WORKING

                LEDs are special diodes that emit light when

                connected in a circuit They are frequently used as pilot lights in electronic appliances to

                indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                the heart of an LED the semi-conductor chip

                In our project Green LED are used here for mainly two purpose

                a Charging ON indication (when ON)

                b Channel fault indication (always OFF)

                732 TESTING

                The good and working LED will then light up or glow a busted LED will not LEDs

                must have a resistor in series to limit the current to a safe value for quick testing purposes a

                1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                directly connected to a battery or power supply It will be destroyed the LED

                733 FEATURES

                Single color

                High bright output

                Low power consumption

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                High reliability and long life

                734 Descriptions

                Dice material GaInN

                Emitting Color Super Bright White

                Device Outlineφ5mm Round Type

                Lens Type Water Clear

                74 RELAY

                741 WORKING

                A relay is an electrically operated switch Current

                flowing through the coil of the relay creates a magnetic field

                which attracts a lever and changes the switch contacts The coil

                current can be on or off so relays have two switch positions and

                most have double throw (changeover) switch contacts

                Relays are like remote control switches and are used in

                many applications because of their relative simplicity long life

                and proven high reliability

                742 USES

                The main operation of a relay comes in places where only a low-power signal can be

                used to control a circuit

                It is also used in places where only one signal can be used to control a lot of circuits

                The application of relays started during the invention of telephones They played an

                important role in switching calls in telephone exchanges They were also used in

                long distance telegraphy They were used to switch the signal coming from one

                source to another destination

                743 TESTING

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                A relay will usually have a coil pole terminal and a set of

                contacts The set of contacts that are open when the relay is not

                energized are called normally open (NO) contacts and the set of

                contacts that are closed when the relay is not energized are called

                normally closed (NC) contacts The following steps can be used to perform the testing of

                the relay using a multimeter

                Keep the multimeter in the continuity check mode

                Check for continuity between the NC contacts and pole

                Check for discontinuity between NO contacts and the pole

                Now energies the relay using the rated voltage For example use a 9V battery for

                energizing a 9V relay The relay will engage with clicking sound

                Now check for continuity between NO contacts and pole

                Also check for discontinuity between NC contacts and pole

                As a final test measure the resistance of the relay coil using a multimeter and check

                whether it is matching to the value stated by the manufacturer

                If all the above tests are positive we can conclude that the relay is healthy

                75 TRANSFORMER

                751 WORKING

                A transformer is a device that transfers electrical energy

                from one circuit to another through inductively coupled

                electrical conductors A changing current in the first circuit (the

                primary) creates a changing magnetic field

                This changing magnetic field induces a changing voltage in the second circuit (the

                secondary) This effect is called mutual induction

                If a load is connected to the secondary circuit electric charge will flow in the

                secondary winding of the transformer and transfer energy from the primary circuit to the

                load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                number of primary turns

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                By appropriate selection of the numbers of turns a transformer thus allows an

                alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                making it less

                752 TESTING

                1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                scale and then adjusting the knob to verify its reading is an easy step to the

                reading of the ohm

                2 To check the resistance of the coil unplug or unsolder the leads of the

                transformer from its circuit and measure the resistance of each coil

                3 The next step is to test each coil for shorts to other coils

                76 RECTIFIER BRIDGE (W 10)

                761 WORKING

                A diode bridge rectifier is a device for converting AC or

                alternating current electricity into DC or direct current AC

                electricity goes from positive to negative constantly whereas DC

                always flows in the same direction

                AC electricity is more efficient to transmit and easier to

                convert into different voltages However most appliances need DC current to run A diode

                bridge rectifier is the most common type of power supply used to provide this current In

                our project W10 is a bridge rectifier which provides on single semiconductor chip

                77 OSCILLATOR

                771 Working

                An oscillator puts out an endless series of pulses The output

                constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                all digital circuits have some type of oscillator This stream of output pulses is often

                called a clock One of the most important features of any oscillator is its frequency stability

                or in other words its ability to provide a constant frequency output under varying load

                conditions Some of the factors that affect the frequency stability of an oscillator include

                temperature variations in the load and changes in the DC power supply Frequency stability

                of the output signal can be improved by the proper selection of the components used for the

                resonant feedback circuit including the amplifier but there is a limit to the stability that can

                be obtained from normal LC and RC tank circuits

                In our project instead of 12MHz crystal 110592MHz is used because it can be

                divided to give you exact clock rates for most of the common baud rates for the UART

                especially for the higher speeds (9600 19200) These crystals are readily available and

                commonly used

                78 SWITCH

                781 WORKING

                The most familiar form of switch is a manually operated

                electromechanical device with one or more sets of electrical contacts

                Each set of contacts can be in one of two states either closed meaning

                the contacts are touching and electricity can flow between them or

                open meaning the contacts are separated and the switch is non

                conducting The mechanism actuating the transition between these two

                states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                momentary (push-for on or push-for off) type

                782 USES

                In electronics a switch is an electrical component that can break an electrical

                circuit interrupting the current or diverting it from one conductor to another

                783 TESTING

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                When the switch is ON it looks and acts like a wire When the switch is OFF there is

                no connection Switch can tested by using multimeter in continuity range

                79 DARLINGTON PAIR IC (ULN2003a)

                791 WORKING

                The Darlington transistor (often called a Darlington pair) is a

                compound structure consisting of two bipolar transistors (either

                integrated or separated devices) connected in such a way that the

                current amplified by the first transistor is amplified further by the

                second one This configuration gives a much higher current gain than

                each transistor taken separately and in the case of integrated devices

                can take less space than two individual transistors because they can

                use a shared collector

                Integrated Darlington pairs come packaged singly in

                transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                The Darlington transistor array used is ULN2003 Applications include relay

                drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                drivers and logic buffers Each input of this device has a zener diode and resistor in series

                to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                792 FEATURES

                The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                with common-cathode clamp diodes for switching inductive loads The collector-current

                rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                higher current capability

                710 SERIES VOLTAGE REGULATER IC (78XX)

                7101 WORKING

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Voltage Regulator (regulator) usually having three legs converts varying input

                voltage and produces a constant regulated output voltage They are available in a variety of

                outputs

                The most common part numbers start with the numbers 78 or 79 and finish with two

                digits indicating the output voltage The number 78 represents positive voltage and 79

                negative one The 78XX series of voltage regulators are designed for positive input

                The LM78XX series typically has the ability to drive current up to 1A For

                application requirements up to 150mA 78LXX can be used As mentioned above the

                component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                an output leg with the regulators voltage

                As a general rule the input voltage should be limited to 2 to 3 volts above the output

                voltage The LM78XX series can handle up to 36 volts input be advised that the power

                difference between the input and output appears as heat If the input voltage is unnecessarily

                high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                sinking the regulator will shut down

                711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                7111 WORKING

                The MAX-232 It includes a Charge Pump which generates

                +10V and -10V from a single 5v supply

                This IC also includes two receivers and two transmitters in

                the same package This is handy in many cases when we only want to

                use the Transmit and Receive data Lines We dont need to use two chips one for the

                receive line and one for the transmit There are also many variations of these devices The

                large value of capacitors are not only bulky but also expensive Therefore other devices are

                available which use smaller capacitors and even some with inbuilt capacitors However the

                MAX-232 is the most common and thus we will use this RS-232 Level Converter

                Dual Charge-Pump Voltage Converter

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                output

                712 OPTOCOUPLER IC (4N33)

                7121 WORKING

                In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                photoMOS) is a device that uses a short optical transmission path to transfer a signal

                between elements of a circuit typically a transmitter and a receiver while keeping them

                electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                back to an electrical signal electrical contact along the path is broken

                Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                essentially a combination of two distinct devices an optical transmitter typically a gallium

                arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                light-triggered diac The two are separated by a transparent barrier which blocks any

                electrical current flow between the two but does allow the passage of light

                The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                of isolation between driving and load circuits These Optocouplers can be used to replace

                reed and mercury relays with advantages of long life high speed switching and elimination

                of magnetic field

                713 MICROCONTROLLER IC (89V51 RD 2 )

                713 WORKING

                The P89V51RD2 is an 80C51 microcontroller with 64

                kB Flash and 1024 bytes of data RAM

                A key feature of the P89V51RD2 is its X2 mode option

                The design engineer can choose to run the application with the conventional 80C51 clock

                rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                achieve twice the throughput at the same clock frequency Another way to benefit from this

                feature is to keep the same performance by reducing the clock frequency by half thus

                dramatically reducing the EMI

                The Flash program memory supports both parallel programming and in serial In-

                System Programming (ISP) Parallel programming mode offers gang-programming at high

                speed reducing programming costs and time to market ISP allows a device to be

                reprogrammed in the end product under software control The capability to fieldupdate the

                application firmware makes a wide range of applications possible The P89V51RD2 is also

                In-Application Programmable (IAP) allowing the Flash program memory to be

                reconfigured even while the application is running

                714 RELIMATE CONNECTOR

                7141 WORKING

                These are wire to board type connectors used to facilitate

                proper and firm electrical connection between the relay card and

                microcontroller card

                The connector has following specifications

                No of Ways 2-20

                Voltage Rating 250V AC DC

                Current Rating 3A AC DC

                Contact Resistance 20mW max

                Insulation Resistance 1000MW min

                Dielectric Withstanding 1000V ACminute

                Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                connector is it provides a fast and easy connection and disconnection it also avoids polarity

                conflicts

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                715 RS-232 PORT CONNECTOR

                7151 WORKING

                Almost all digital devices which we use require either TTL

                or CMOS logic levels Therefore the first step to connecting a

                device to the RS-232 port is to transform the RS-232 levels back

                into 0 and 5 Volts This is done by RS-232 Level Converters

                Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                problem in many instances where only a single supply of +5V is present

                CHAPTER 8

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                IMPLIMENTATION

                OF THE PCB

                Components layout designing

                Developing or Etching the PCB

                Other operations like Drilling Cutting Tinning

                81 IMPLIMENTATION OF THE PCB

                A proper PCB ensure that various circuit components are interconnected as per the

                circuit diagram once they have been placed on the PCB in their proper positions and

                subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                base material to which is permanently attached a flat metallic network of conducting path

                whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                for this project is single one

                The basic material used may be resin coated paper fiber glass ceramic and the flat

                board configuration however is most widely used and it may be of the nature of the single

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                which ensures adequate and permanent low resistance coupling

                811 BOARD DESIGN

                PCB designed is the most important and requires great care during work In this case

                great care must be taken while tracing the circuit or layout on the board Because once PCB

                is designed it is virtually impossible to alter it While designing a circuit designer should

                take care to avoid crossing of conducting path (tracks) as possible Crossover are

                unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                also help to solve this problem when circuit is complicated

                812 THE MASTER DIAGRAM

                The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                which is commonly made twice as the finished circuit since this makes the working on that

                much easier especially when circuit is complicated photography eventually reduces the

                size of diagram to that of the circuit before proceeding we must know some rules regarding

                the designing -

                a The space between the conductors must be strictly controlled to avoid the possibility

                of electrical discharges or unwanted capacitance The amount by which the mater

                diagram is to reduce in size is thus a critical deign feature

                b The conductor must be wider in those part of the circuits that are going to handle

                large current must be handle without undue temperature of conductors

                c The minimum width of copper should not generally be less than about 15mmThis

                is related to mechanical strength rather than electrical properties and it also ensure

                that strips remains securely bounded to the base material

                d The points where the component holes for component lead wire occurs must be sited

                to suit the dimensions of the component and dimensions between lead-out wire so

                that the components can be situated correctly on finished board The conductor is

                also main large at the point of holes

                813 PCB MAKING

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                When the mater diagram probable twice the size of real PCB has been evolved the

                test major step consists of etching or dissolving the unwanted metal from copper claded

                board to create a circuit as depicted by master diagram It must be stressed that very

                accurate checking master is essential at this stage Then the master point is mounted on a

                special frame on easy facing of a larger camera and with the aid of the very powerful

                illumination a master diagram is clearly photographed on a glass sensitive plate This is

                developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                brought into operation This comprises the camera body mounted so that sideways after

                each exposure In this way number of copies of the original master diagram is set out

                exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                In case of simple and need of number of less PCB economic and advisable to use the

                following lab method of PCB making

                Planning The Circuit

                It is not a particular difficult There are several important factors that need not be

                taken into account if the finished device is to work properly we must consider gain factor

                and ensure that the input and output parts are sufficiently well isolated to avoid the

                possibility We must also ensure that conductors and components carrying high frequency

                current are well separated from the part of the circuit We are also to make sure that all

                components need to return to earth are properly connected and that possibility of common

                impedance arising earth returned

                Circuit is totally eliminated by making all earth as substantial possible consistent

                with nature of design Other factors that have to successfully studied include availability of

                adequate return points on board and itrsquos mounting from accessibility of switch connection

                made for mechanical fixing ventilation effect of vibration

                Cleaning The Board

                The copper side of the board must be thoroughly cleaned before circuit plan is

                transferred to it This is important because even slightest trace of graze (from figure of

                instance) will impure the etching process and when the circuit plan has been neatly

                transferred to copper in this manner the board is held under running tap and the allowed to

                dry before resist is applied

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Transforming the Plan

                Now once cleaning is done plan has to transfer on copper surface of PCB material

                A convenient way to do this is simply put the carbon paper between a copper surface of the

                board and working plan and carefully trace the lines of original plan with a ball pen

                Resist

                Resist is nothing more than a substrate that is unaffected by presence etching

                chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                clearly worked on clean copper that are to be left in fact as the copper conductor must be

                covered when resists the leaguer type of paints possess good resist properties but

                disadvantage of relatively long time taken for drying It is essential to resist through

                hardening before etching is started Nail polished are better as they quickly and are less

                difficult to remove

                To overcome this drying effect and to achieve the sharp edge of the trace on the

                PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                short circulating due to paints are completely the avoid etching tapes and pads are available

                in different sizes

                Correcting Error

                When a result has been thoroughly hardened any errors that have been made can

                usually be corrected by gently scratching away with knife To ensure clear out lines round

                edges of copper conductors on board the resist must be applied with steady band

                Etching

                Next comes etching of unwanted copper amp whether a small single is all that is

                required as quantity of board to be produce certain precautions must be taken before

                operation is commenced the most used etch amp I ferrite chloride to this is added small

                quantity of HCL to accelerate But not critical as lab construction concerned A good

                etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                grams of water

                Agitation

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                the etchant process The depth of liquid must be sufficient to completely cover laminate the

                laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                temperature and thickness of copper foil

                Finishing Off

                When all unwanted copper is dissolved from areas between conductor board should

                be taken from an etchant amp washed in water The resist must be removed using proper

                solvent After this the copper surface must be polished with any kind of cleaner It should be

                seen that there is no slight incomplete etching between the conducting parts of the PCB The

                PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                This process is called Tinning This process of coating involve track with soldier

                Advantage of tinning the effect of environment of conductors then PCB is drilled

                ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                Assembling On PCB

                After the holes are drilled the component have to be assembled on PCB before

                assembling the components it is necessary to clean soldering iron in order to get easy amp

                accurate soldering Removing impurity particles that are gathered on iron bit due to

                repetitive use cleans soldering iron

                CHAPTER 9

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                SOLDERING

                TECHNIQUE

                Technique for good soldering

                91 SOLDERING TECHNIQUE

                For soldering of any joints first the terminal to be soldered are cleaned to remove

                oxide film or dirt on it If required flux is applied on the points to be soldered

                Now the joint to be soldered is heated with the help of soldering iron Heat

                applied should be such that when solder wire is touched to joint it must melt

                quickly

                The joint and the soldering iron is held such that molten solder should flow

                smoothly over the joint

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                When joint is completely covered with molten solder the soldering iron is re-

                moved

                The joint is allowed to cool without any movement

                The bright shining solder indicates good soldering

                In case of dry solder joint a air gap remains in between the solder material and

                the joint It means that soldering is improper This is removed and again solder-

                ing is done

                Thus this way all the components are soldered on P C B

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 10

                PCB LAYOUTS

                Schematic diagram

                Bottom and top layout

                101 POWER SUPPLY CARD

                1011 SCHIMETIC DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1012 LEGEND MARKING

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                Fig1011 Schematic diagram of power supply card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1013TOP LAYER

                1014 BOTTOM LAYER

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                Fig1013 Top layer of power supply

                card

                Fig1014 Schematic diagram of power supply card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                102 BATTERY CHARGER CARD

                1021 SCHEMATIC DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                Fig1021 Schematic diagram of battery charger card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                103 RELAY CARD

                1031 SCHIMETIC DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                Fig1031 Schematic diagram of Relay card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1032 RELAY CARD LEGEND MARKING

                1033 TOP LAYER

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                Fig1032 Legend marking of Relay card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1034 BOTTOM LAYER

                104 MICROCONTROLER CARD

                1041 SCHIMETIC DIAGRAM

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                Fig1034 Bottom layer of Relay card

                Fig1041 Schematic diagram of microcontroller card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1042 ALL LAYERS

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                Fig1042 All layer of microcontroller card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 11

                INTRODUCTION

                OF SOFTWARE

                Keil (microVision 2)

                Eagle (Easily Applicable Graphical Layout Editor)

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                111 Keil (microVision 2)

                1111 Introduction to C51 Cross Compiler

                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                generates object code that matches the efficiency and speed of assembly programming

                Using a high-level language like C has many advantages over assembly language

                programming

                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                the memory structure of the 8051 CPU is desirable (but not necessary)

                Details like register allocation and addressing of the various memory types and data

                types is managed by the compiler

                Programs get a formal structure (which is imposed by the C programming language) and

                can be divided into separate functions This contributes to source code reusability as

                well as better overall application structure

                The ability to combine variable selection with specific operations improves program

                readability

                Keywords and operational functions that more nearly resemble the human thought

                process may be used

                Programming and program test time is drastically reduced

                The C run-time library contains many standard routines such as formatted output

                numeric conversions and floating-point arithmetic

                Existing program parts can be more easily included into new programs because of

                modular program construction techniques

                The language C is a very portable language (based on the ANSI standard) that enjoys

                wide popular support and is easily obtained for most systems Existing program

                investments can be quickly adapted to other processors as needed

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1112 Software Development Cycle in Keil

                When we use the Keil Software tools the

                project development cycle is roughly the same as

                it is for any other software development project

                1 Create a project select the target chip from the

                device database and configure the tool settings

                2 Create source files in C or assembly

                3 Build your application with the project

                manager

                4 Correct errors in source files

                5 Test the linked application A block diagram of

                the complete 8051 tool set may best illustrate the

                development cycle

                112 Eagle (Easily Applicable Graphical Layout Editor)

                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                1121 Schematic Editor

                In this one can develop amp design circuits for the required PCB

                1122 Layout Editor

                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                Fig 111 Software development in KEIL

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1123 Library Editor

                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                1124 Auto Router

                This is an artificial intelligence based tool or subroutine that can do auto routing of

                the PCB tracks designed

                1125 Cam Processor

                This is used to finally print the various layers of the designed PCB viz Top Layer

                Bottom Layer Component Layer Masking Layer etc

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                Start

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 12

                INTRODUCTION

                OF

                PROGRAMMING

                Flowchart of programming

                Program code

                121 Flowchart

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                2

                flag9==1

                flag9=1

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                flag11==1

                flag11=1 flag11=0 flag4=0

                REady_LED4=0

                Sw2_op (P01) ==0

                My delay (10)

                3 3

                flag2=1 disp2=1 k2=0

                3

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                4

                flag11==1

                flag11=0 flag4=0 REady_LED4=0

                flag11=1

                My delay (10)

                flag3=1 disp3=1 k3=0

                k1==0||k2==0||k4==0

                Sw3_op (P02) ==0

                5

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                flag5==1

                5

                flag11==1

                flag7=1

                flag7==1

                flag7=0 flag2=0 REady_LED2=0

                6

                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                flag11=0 flag4=0 REady_LED4=0

                flag11=1

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                6

                My delay (10)

                flag4=1 disp4=1 k4=0

                k1==0||k2==0||k3==0 flag5==1

                7

                Sw4_op (P03) ==0

                flag5=1 flag5=0 flag1=0 REady_LED1=0

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                7

                flag7==1

                flag9==1

                flag7=1

                flag7=0 flag2=0 REady_LED2=0

                flag9=0 flag3=0 REady_LED3=0

                flag9=1

                Sw5_op A(P04) ==0

                My delay (10)

                8

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                9

                flag2==1

                flag3==1

                8

                flag1==1

                flag4==1 flag5=1 disp5=1

                flag9=1 disp5=1

                flag7=1 disp5=1

                flag11=1 disp5=1

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                Sw6_op (P05) ==0

                My delay (10)

                flag2==1 ampamp flag7==1

                flag3==1 ampamp flag9==1 9

                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                flag8=1 disp6=1

                10

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                10

                flag4==1 ampamp flag11==1

                flag10=1 disp6=1

                flag12=1 disp6=1

                flag8==1

                flag10==1

                11

                flag6==1

                i++

                l++

                j++

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                flag12==1

                M++

                11

                Stop

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                122 Program

                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                define buzzerP2_0 buzzer indication

                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                sbit sw5_op=P0^4 input switch5 for coin

                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                output Led for indication

                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                function prototype declaration

                void my_delay(unsigned int value) DELAY FUCTION

                void init_timer() timer 0 initialization function

                variable declaration

                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                start of main programme

                void main()

                init_timer() call it timer initialization function

                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                start of while loop

                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                condition for switch1

                if(flag1==1) check swich1 pressed if(disp1==1 )

                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                if(iltk) loop will repeat for desired time of charging

                if(igt=1000)

                buzzer=1 turn on buzzer if (ii==20)

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                REady_LED1=1 turn on ready indication of led1

                else if(ii==40)

                REady_LED1=0ii=0

                elseREady_LED1=0

                START_LED1=1

                else

                START_LED1=0

                k1=1 buzzer=0

                REady_LED1=0 flag1=0

                flag5=0flag6=0

                condition for switch2

                if(flag2==1) check swich2 pressed if(disp2==1)

                REady_LED2=1 turn on ready 2 led indication

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                disp2=0

                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                if(jltk)

                if(jgt1000) buzzer=1 if(jj==20)

                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                elseREady_LED2=0

                START_LED2=1

                else START_LED2=0

                REady_LED2=0 k2=1 buzzer=0

                flag2=0flag7=0flag8=0

                j=0jj=0

                condition for switch 3

                if(flag3==1) check swich3 pressed

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                if(disp3==1 )

                REady_LED3=1 disp3=0

                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                if(lltk)

                if(lgt1000) buzzer=1 if(ll==20)

                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                elseREady_LED3=0

                START_LED3=1

                else START_LED3=0

                LED2=0 k3=1 buzzer=0

                REady_LED3=0 flag3=0

                flag9=0flag10=0

                l=0ll=0

                condition for switch 4

                if(flag4==1) check swich4 pressed if(disp4==1 )

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                REady_LED4=1 disp4=0

                if(flag11==1) check coin is pressed

                if(flag12==1) START is pressed

                if(mltk)

                if(mgt1000)

                buzzer=1 if(mm==20)

                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                elseREady_LED4=0

                START_LED4=1

                else START_LED4=0

                buzzer=0 k4=1

                REady_LED4=0 flag4=0

                flag11=0flag12=0

                m=0mm=0

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                while(1)

                end of main programme

                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                whenever specific time the interrupt will generate control will go in following function

                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if(sw1_op==0 ) ready switch flag for system1

                my_delay(10) CALL DELAY FUNCTION

                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                if(flag7==1) SET THE FLAG

                flag7=1

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                flag9=1

                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                flag11=1

                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if(sw2_op==0 ) fready switch flag for system2

                my_delay (10)

                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                if(flag5==1)

                flag5=1

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                flag9=1

                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                flag11=1

                elseflag11=0flag4=0REady_LED4=0

                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                if(flag7==1)

                flag7=1

                else

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                flag5=1

                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                flag11=1

                elseflag11=0flag4=0REady_LED4=0

                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                if(flag7==1)

                flag7=1

                elseflag7=0

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                flag2=0REady_LED2=0 if(flag5==1)

                flag5=1

                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                flag9=1

                elseflag9=0flag3=0REady_LED3=0

                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                if(flag6==1)

                i++ if (igt1000) ii++

                if (flag8==1)

                j++ if(jgt1000) jj++

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                if (flag10==1)

                l++ if (lgt1000) ll++

                if (flag12==1)

                m++ if (mgt1000) mm++

                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 13

                TROUBLE SHOOT

                Troubleshoot

                131 TROUBLE SHOOT

                A newly assembled circuit does not work may be due to -

                Faulty components

                Improper soldering

                Wrong connections

                Also any stop in working after some period may be due to -

                Component failure

                Supply failure

                Damaging of PCB

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Fault finding is very essential if you want the circuit to operate properly

                If a newly assembled circuit is not working properly check all the components and

                circuit connections according to the diagram The circuit may not be working due to wrong

                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                proper soldering

                If faults are not observed during physical observations one should proceed for Hot

                test ie Voltage measurement at different points for example at Input terminal etc

                Resistance measurement is also done which is known as Dry test

                During this project work some green LEDs was not glow then we checked it

                continuity and replace it

                Also relay was not properly worked therefore we replaced it Some ICs was get

                heated after starting the project It happens because of some soldering points are shorted

                during soldering PCB We solved that problem

                CHAPTER 14

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                ADVANTAGES OF

                THE PROJECT

                Advantages

                141 ADVANTAGES OF THE PROJECT

                Simple and hand efficient Microcontroller based system

                Fast charging capacity

                Simple to operate

                Ease of mobility

                Facilitates connectivity for 90 of cellular phones

                Less expensive

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Reduced man power

                Low power consumption

                It can offer emergency charging for 4sets of handsets synchronously

                CHAPTER 15

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                DISADVANTAGES

                OF THE PROJECT

                Disadvantages

                151 DISADVANTAGES OF THE PROJECT

                It requires mains supply to work project

                Due to limited charging channels till now there may be a possibility that

                mobile phones of few brands cannot be connected for charging For this

                purpose we have to use separate connectors for that specific brand differently

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                min

                It does not have battery backup therefore it cannot be portable

                CHAPTER 16

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                APPLICATIONS OF

                THE PROJECT

                Application

                161 APPLICATIONS OF THE PROJECT

                The coin based mobile phone charger is very useful to public for using coin to

                charge for the mobile phone in any places

                It is used for emergency charging purposes

                It can be installed in malls railway stations bus stops and other public

                places

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                The charger offers a unique revenue opportunity for a vast range of

                businesses - from airports to pubs from universities to health clubs virtually

                any location where there is a high footfall creating a large number of

                potential users

                It can be installed in offices and collages for pay charging facility

                CHAPTER 17

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                FUTURE

                DEVELOPMENT OF

                THE PROJECT

                FUTURE DEVELOPMENT OF THE PROJECT

                171 FUTURE DEVELOPMENTOFTHE PROJECT

                This project is very useful to people who are using mobile phone without charging

                condition in public places

                It will use with a stereo advertisement carrier that can display video advertisement

                It will provide battery backup for make it portable

                It will also provide SMS system in future

                We can also increase the charging time by editing software of the project

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 18

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                COST ANALYSIS

                OF THE PROJECT

                COST ANALYSIS OF THE PROJECT

                181 COST ANALYSIS OF THE PROJECT

                1811 Component list for power supply card

                Footprint Quantity Designators Rate

                Resistor

                22K 1 R2 1

                1K 1 R1 1

                Capacitor

                1000uf25V 1 C5 10

                2200uf25V 1 C1 10

                022uf 2 C6 C2 1

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                Table 1811 Component list for power supply card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                01uf 2 C4 C3 1

                IC

                BRIDGE W10 2 BR2 BR1 10

                L7812CV (TO-220) 1 U2 8

                L7805CV (TO-220) 1 U1 8

                Connector

                CON PHO 2PIN 2 J3 J2 16

                CON PHO 3PIN 1 J1 12

                LED3mm red 2 L1 L2 15

                Heat sink (TO-220) 2 16

                Total 955

                1812 Component list for battery charger card

                Footprint Quantity Rate

                Capacitor

                2200uf25V 1 1000

                022uf 4 100

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                01uf 4 100

                IC

                BRIDGE W10 1 500

                L7805CV (TO-220) 4 3200

                Connector

                CON PHO 2PIN 1 800

                Relimate 2 pin 1 400

                relimate 3 pin 4 2000

                Heat sink (TO-220) 4 1200

                TOTAL 9300

                1813 Component list for Relay card

                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                Table 1812Component list for battery charger card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                RELIM-4 1 J1 700 16 pin ic socket 1 400

                Total 18900

                1814Component list for controller card

                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                Table 1813Component list for relay card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                total 27000

                1815 Miscellaneous material

                Material Quantity Rate

                electronic item

                Transformer

                TXR1 0-9-15 1 20000

                0-9 1A

                0-15 100mA

                TXR2 0-9 1 16500

                0-9 1A

                Proximity switch 1 20000

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                Table 1814Component list for microcontroller card

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Red push bottom 4 4000

                Green push button 1 1000

                Red led 5mm 4 800

                Green led 5mm 4 800

                Led holder 8 1600

                Copper clad 2 4000

                3 core cable 1 meter 1500

                3 pin plug 1 3000

                2 pin relimate wire 19 9000

                3 pin relimate wire 5 3750

                4 pin relimate wire 2 2000

                mechanical items

                Enclosure 1 25000

                Acrylic sheet 2 X 1 30000

                12mm cable gland 1 1000

                Screw 3mm 33 2000

                Screw 35mm 6 2400

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                10 mm spacers 100 1500

                10mm insert to stud 50 10000

                cable tie 2500

                Total 162350

                CHAPTER 19

                APPENDIX

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                Table 1815Component list for miscellaneous material

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                APPENDIX

                191 APPENDIX

                1911 78xx IC datasheet

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1912 W10 datasheet

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1913 4n33 IC datasheet

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                1914 MAX 232

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1915 ULN2003a IC datasheet

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                1916 89V51RD2 IC datasheet

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 20

                CONCLUSION

                CONCLUSION

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                201 CONCLUSION

                The coin-operated mobile phone charger is already successfully installed in

                hundreds of locations worldwide providing a unique service to the public and a source of

                revenue for site providers The coin-operated mobile charger can be quickly and easily

                installed in any business premises

                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                from airports to pubs from universities to health clubs virtually any location where there is

                a high footfall creating a large number of potential users

                The charger can charge up to 4 different mobile phones simultaneously It will

                extend low mobile phone talk time provide battery charging

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 21

                IMAGES OF THE

                PROJECT

                Images of the project

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                211 IMAGES OF THE PROJECT

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                fig211 lsquoCoin operated mobile battery charger

                Fig212 Circuit arrangement of coin operated mobile battery charger

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Fig 216 Relay driver circuit

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                Fig 213 Constant voltage battery charger circuit

                Fig214 Power supply circuit

                Fig215 Metal detector proximity switch

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Fig217 Microcontroller circuit

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                Fig228 coin operated mobile battery charger project presentation

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                CHAPTER 22

                BIBILOGRAPHY

                BIBLIOGRAPHY

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                221 BIBLIOGRAPHY

                BOOKS

                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                INTERNET LINKS

                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                • CHAPTER 1

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 4

                  BLOCK DIAGRAM

                  OF THE PROJECT

                  Block Diagram Brief Explanation

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 9

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  41 Block Diagram

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

                  Fig 41 Block diagram of the project

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  42 Brief Explanation

                  421 POWER SUPPLY

                  Power supply is used to deliver power to the circuit It delivers +5Vdc to

                  microcontroller and other peripherals and +12Vdc delivers power to relay

                  422 COIN INPUT AND LEVEL CONVERTOR

                  Coin input is a sensor which senses a metal and produces an output voltage This

                  voltage is high as compared to the input required for microcontroller

                  Hence a level shifter is used to bring down the voltage level which could be

                  readable to microcontroller

                  423 START SWITCH

                  Start switch is used to start the charging process of a

                  mobile phone

                  424 RS232 INTERFACING TO PC

                  RS 232 is a protocol used for communication between

                  computer and microcontroller It is also used for

                  programming the microcontroller in its ISP (in system

                  programming) mode

                  425 CHANNEL READY INDICATOR

                  It provides visual indication for the channel which is in

                  charging mode

                  426 DARLINGTON PAIR ARRAY

                  Darlington pair array is used as a relay driver

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  427 CHANNEL IN CHARGE INDICATION

                  It provides visual indication for the channel which is in

                  charging mode

                  428 RELAY ARRAY

                  Relay array consists of relays for each channel to

                  provide electromechanical switching in between charger and

                  mobile phone

                  429 CHARGER ARRAY

                  Charger array is used to provide charging power to the

                  mobile phones through the electromechanical switches

                  4210 CELL PHONE TO CHARGE

                  Channel select switch is used for selecting a channel on

                  which the mobile phone is to be charged

                  4211 MICROCONTROLLER

                  Microcontroller is used to control the whole operation of

                  the device Microcontroller reads input signal from input

                  device and triggers the output device According to the

                  conditions defined in the microcontroller by the programmer

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 5

                  CIRCUIT

                  DIAGRAM

                  EXPLANATION

                  Circuit diagram

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Circuit diagram explanation Working

                  51 POWER SUPPLY CIRCUIT

                  511 CIRCUIT DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                  Fig51 Circuit diagram of the power supply

                  Bridge RectifierTRANSFORMER

                  Filter Voltage regulator Load

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  512 WORKING

                  Transformer

                  A step-down transformer is used to achieve our requirements of the power

                  supply It steps down high voltage ac mains to low voltage ac mains

                  Bridge Rectifier

                  A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                  full wave rectification This is a widely used configuration both with individual

                  diodes wired and with single component bridges where the diode bridge is wired

                  internally It also converts ac to dc but the dc output is varying

                  One advantage of a bridge rectifier over a conventional full-wave rectifier is

                  that with a given transformer the bridge rectifier produces a voltage output that is

                  nearly twice that of the conventional full-wave circuit

                  Filter

                  The output of the rectifier is a pulsating dc wave We need a constant dc

                  output To do this we need to filter out the oscillation from the pulsating dc wave

                  This is obtained with a diode capacitor combination

                  Voltage Regulator

                  A voltage regulator is used for voltage regulation in the circuit This provides

                  a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                  dc output to fixed voltages

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                  Fig 52 Block diagram of the power supply

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Load

                  The load can be anything which wants to switch ON by using power supply

                  513 CIRCUIT DIAGRAM EXPLANATION

                  Regulated power supplies are commonly used in engineering projects Power

                  supply is food of any circuit

                  +5V SUPPLY UNIT

                  +5V supply is obtained from the +5V supply unit for microcontroller and

                  digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                  transformer having a capacity of 500mA

                  Since the input voltage to the regulator IC should be more than its output

                  voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                  of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                  smooth DC supply The rating of the chosen capacitor filter is 1000microF

                  The regulated DC voltage is obtained by using a regulator IC 7805 In the

                  case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                  Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                  output of regulator IC to eliminate the voltage oscillations at the output due to the large

                  voltage oscillations at the input of the regulator

                  +12V SUPPLY UNIT

                  The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                  arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                  step down transformer having a capacity of 1A and the center tap of the transformer is

                  grounded This low voltage is rectified with the help off bridge rectifier

                  Since the input voltage to the regulator IC should be more than its output

                  voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                  the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                  filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                  For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                  7912 is used

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                  the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                  connected at the output as shown in figure to eliminate the voltage oscillations at the

                  output due to the large voltage oscillations at the input of the regulator

                  52 CONSTANT VOLTAGE CHARGER

                  521 CIRCUIT DIAGRAM

                  Fig 53 Circuit diagram of the battery charger

                  522 CIRCUIT DIAGRAM EXPLANATION

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Constant-voltage (often called constant-potential) chargers maintain nearly the same

                  voltage input to the battery throughout the charging process regardless of the batterys state

                  of charge Constant-voltage chargers provide a high initial current to the battery because of

                  the greater potential difference between the battery and charger

                  A constant-voltage charger may return as much as 70 of the previous discharge in

                  the first 30 minutes This proves useful in many battery applications involving multiple

                  discharge scenarios As the battery charges its voltage increases quickly This reduces the

                  potential that has been driving the current with a corresponding rapid decrease in charge

                  current as depicted in the illustration below As a result even though the battery reaches

                  partial charge quickly obtaining a full charge requires prolonged charging

                  Given this behavior constant-voltage chargers are frequently found in applications

                  that normally allow extended charging periods to attain full charge Constant-voltage

                  chargers should not be used where there is frequent cycling of the battery Repeated

                  discharges without returning the cell to its full charge will eventually decrease the battery

                  capacity and may damage individual cells

                  Fig 54An Illustration graph of the charging function of constant battery charger

                  Constant-voltage chargers are most often used in two very different modes as a fast

                  charger to restore a high percentage of charge in a short time or as a float charger to

                  minimize the effects of overcharge on batteries having infrequent discharges

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  53 RELAY DRIVER CIRCUIT

                  531 CIRCUIT DIAGRAM

                  532 CIRCUIT DIAGRAM EXPLANATION

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                  Fig 55 Relay driver circuit

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Input from the controller is connected to the relay card through connector J1 which

                  carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                  pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                  These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                  relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                  series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                  and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                  relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                  NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                  3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                  RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                  is used to connect power supply to relay card

                  533 WORKING

                  While taking Relay1 (RL1) into consideration we will discuss the working of relay

                  card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                  of the IC are in cut off region which causes an open circuit so there is no current flow

                  flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                  applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                  completes the path ie provide ground to the relay coil so the current flows through the

                  LED activating the relay

                  As the current flows through the relay coil it gets energized and switch over the

                  contacts ie common and normally open contact get connected and provide a path to flow

                  current from J11 ie charger into the load connected at J4 hence the cell phone charging

                  process starts The same above process is applies for all relays If LED is fused or

                  damaged the path will be open and relay will not be energized and if relay is damaged the

                  led will not be illuminated So the LED here is used as a FAULT indicator and a

                  CHARGING ON indicator

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  54 MICROCONTORLLER CIRCUIT

                  541 CIRCUIT DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  542 CIRCUIT DIAGRAM EXPLANATION

                  CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                  the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                  port P04 through J4 and START switch is connected to port P05 through SW5

                  Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                  P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                  Output for relay card is taken on port P14 to P17

                  Components C1 R1 and push button S1 forms reset circuit which provides a power

                  on reset for the micro controller and even provide manual reset Crystal XL1 is a

                  110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                  22pf capacitor used as loading capacitor for crystal

                  Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                  RN2 resistance network

                  IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                  the proximity switch and microcontroller and convert its output readable to microcontroller

                  IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                  communication between PC and a microcontroller through connector J3

                  Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                  communication process

                  Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                  power supply connection

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  543 PORT ASSIGNMENTS FOR 89V51RD2FN

                  P00 = switch1 for channel 1

                  P01 = switch2 for channel 2

                  P02 = switch3 for channel 3

                  P03 = switch4 for channel 4

                  P04 = switch5 for coin input sensor (proximity switch)

                  P05 = switch6 for start charging

                  P10 = channel 1 red LED1 (ready system)

                  P11 = channel 2 red LED2 (ready system2)

                  P12 = channel 3 red LED3 (ready system3)

                  P13 = channel 4 red LED4 (ready system4)

                  P14 = channel 1 relay (start system1)

                  P15 = channel 2 relay (start system2)

                  P16 = channel 3 relay (start system3)

                  P17 = channel 4 relay (start system4)

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 6

                  LIST OF THE

                  COMPONENTS

                  List of the components

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  61 LIST OF THE COMPONETS

                  RESISTORS

                  CAPACITORS

                  LIGHT EMITING DIODES (LEDS)- Green Red

                  RELAYrsquoS-

                  TRANSFORMERS

                  RECTIFIER BRIDGES (W 10)

                  OSCILLATOR

                  SWITCHES- Push switches

                  DARLINGTON PAIR IC (ULN2003a)

                  SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                  SERIAL COMMUNICATION DRIVER IC (MAX 232)

                  OPTOCOUPLER IC (4N33)

                  MICROCONTROLLER IC (89V51 RD2)

                  RELIMATE CONNECTOR- 2 pin amp 4 pin

                  RS-232 PORT CONNECTOR

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 7

                  INTRODUCTION

                  OF COMPONENTS

                  Working of components

                  Features or Uses of components

                  Testing of components

                  71 RESISTOR

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  711 WORKING

                  Resistors limit current Resistors are considered to be the most used and the most

                  important component of all the electronic circuits Resistors resist the flow of electrical

                  current The higher the value of resistance (measured in ohms)

                  the lower the current will be

                  712 TESTING

                  Read the indicated color code value then select the OHM-scale within but not way

                  below the indicated value A resistor is good if its resistance is close to the indicated

                  Tolerance should be considered with the ohmmeter reading While no resistance reading at

                  all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                  ohmmeter scale settings resistor is shorted

                  713 SPECIFICATIONS

                  To completely specify a resistors characteristics requires knowledge of the following

                  parameters-

                  bull Value

                  bull Tolerance

                  bull Temperature Coefficient

                  bull Power Rating

                  The specification of a resistor may be marked on its surface using either of two

                  systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                  the second more recent system uses a combination of alpha-numeric characters

                  7 2 CAPACITOR

                  721 WORKING

                  When DC voltage is applied to the capacitor an electric charge is stored on each

                  electrode While the capacitor is charging up current flows The current will stop flowing

                  when the capacitor has fully charged Capacitors find use

                  in circuits for a variety of purposes They are used in

                  time delay generation RC circuits In power supplies for filtering and power supply

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  decoupling as blocking capacitors for power factor correction and motor starting in LC

                  tank circuits and so on

                  722 TESTING

                  To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                  negative probe to the capacitor positive terminal the positive probe to the negative terminal

                  A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                  and moves back again to infinite resistance position A defective indication for an

                  electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                  which is an indication that the capacitor is shorted

                  73 LIGHT EMITING DIODE (LED)

                  731 WORKING

                  LEDs are special diodes that emit light when

                  connected in a circuit They are frequently used as pilot lights in electronic appliances to

                  indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                  the heart of an LED the semi-conductor chip

                  In our project Green LED are used here for mainly two purpose

                  a Charging ON indication (when ON)

                  b Channel fault indication (always OFF)

                  732 TESTING

                  The good and working LED will then light up or glow a busted LED will not LEDs

                  must have a resistor in series to limit the current to a safe value for quick testing purposes a

                  1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                  directly connected to a battery or power supply It will be destroyed the LED

                  733 FEATURES

                  Single color

                  High bright output

                  Low power consumption

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  High reliability and long life

                  734 Descriptions

                  Dice material GaInN

                  Emitting Color Super Bright White

                  Device Outlineφ5mm Round Type

                  Lens Type Water Clear

                  74 RELAY

                  741 WORKING

                  A relay is an electrically operated switch Current

                  flowing through the coil of the relay creates a magnetic field

                  which attracts a lever and changes the switch contacts The coil

                  current can be on or off so relays have two switch positions and

                  most have double throw (changeover) switch contacts

                  Relays are like remote control switches and are used in

                  many applications because of their relative simplicity long life

                  and proven high reliability

                  742 USES

                  The main operation of a relay comes in places where only a low-power signal can be

                  used to control a circuit

                  It is also used in places where only one signal can be used to control a lot of circuits

                  The application of relays started during the invention of telephones They played an

                  important role in switching calls in telephone exchanges They were also used in

                  long distance telegraphy They were used to switch the signal coming from one

                  source to another destination

                  743 TESTING

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  A relay will usually have a coil pole terminal and a set of

                  contacts The set of contacts that are open when the relay is not

                  energized are called normally open (NO) contacts and the set of

                  contacts that are closed when the relay is not energized are called

                  normally closed (NC) contacts The following steps can be used to perform the testing of

                  the relay using a multimeter

                  Keep the multimeter in the continuity check mode

                  Check for continuity between the NC contacts and pole

                  Check for discontinuity between NO contacts and the pole

                  Now energies the relay using the rated voltage For example use a 9V battery for

                  energizing a 9V relay The relay will engage with clicking sound

                  Now check for continuity between NO contacts and pole

                  Also check for discontinuity between NC contacts and pole

                  As a final test measure the resistance of the relay coil using a multimeter and check

                  whether it is matching to the value stated by the manufacturer

                  If all the above tests are positive we can conclude that the relay is healthy

                  75 TRANSFORMER

                  751 WORKING

                  A transformer is a device that transfers electrical energy

                  from one circuit to another through inductively coupled

                  electrical conductors A changing current in the first circuit (the

                  primary) creates a changing magnetic field

                  This changing magnetic field induces a changing voltage in the second circuit (the

                  secondary) This effect is called mutual induction

                  If a load is connected to the secondary circuit electric charge will flow in the

                  secondary winding of the transformer and transfer energy from the primary circuit to the

                  load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                  of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                  number of primary turns

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  By appropriate selection of the numbers of turns a transformer thus allows an

                  alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                  making it less

                  752 TESTING

                  1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                  scale and then adjusting the knob to verify its reading is an easy step to the

                  reading of the ohm

                  2 To check the resistance of the coil unplug or unsolder the leads of the

                  transformer from its circuit and measure the resistance of each coil

                  3 The next step is to test each coil for shorts to other coils

                  76 RECTIFIER BRIDGE (W 10)

                  761 WORKING

                  A diode bridge rectifier is a device for converting AC or

                  alternating current electricity into DC or direct current AC

                  electricity goes from positive to negative constantly whereas DC

                  always flows in the same direction

                  AC electricity is more efficient to transmit and easier to

                  convert into different voltages However most appliances need DC current to run A diode

                  bridge rectifier is the most common type of power supply used to provide this current In

                  our project W10 is a bridge rectifier which provides on single semiconductor chip

                  77 OSCILLATOR

                  771 Working

                  An oscillator puts out an endless series of pulses The output

                  constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  all digital circuits have some type of oscillator This stream of output pulses is often

                  called a clock One of the most important features of any oscillator is its frequency stability

                  or in other words its ability to provide a constant frequency output under varying load

                  conditions Some of the factors that affect the frequency stability of an oscillator include

                  temperature variations in the load and changes in the DC power supply Frequency stability

                  of the output signal can be improved by the proper selection of the components used for the

                  resonant feedback circuit including the amplifier but there is a limit to the stability that can

                  be obtained from normal LC and RC tank circuits

                  In our project instead of 12MHz crystal 110592MHz is used because it can be

                  divided to give you exact clock rates for most of the common baud rates for the UART

                  especially for the higher speeds (9600 19200) These crystals are readily available and

                  commonly used

                  78 SWITCH

                  781 WORKING

                  The most familiar form of switch is a manually operated

                  electromechanical device with one or more sets of electrical contacts

                  Each set of contacts can be in one of two states either closed meaning

                  the contacts are touching and electricity can flow between them or

                  open meaning the contacts are separated and the switch is non

                  conducting The mechanism actuating the transition between these two

                  states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                  momentary (push-for on or push-for off) type

                  782 USES

                  In electronics a switch is an electrical component that can break an electrical

                  circuit interrupting the current or diverting it from one conductor to another

                  783 TESTING

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  When the switch is ON it looks and acts like a wire When the switch is OFF there is

                  no connection Switch can tested by using multimeter in continuity range

                  79 DARLINGTON PAIR IC (ULN2003a)

                  791 WORKING

                  The Darlington transistor (often called a Darlington pair) is a

                  compound structure consisting of two bipolar transistors (either

                  integrated or separated devices) connected in such a way that the

                  current amplified by the first transistor is amplified further by the

                  second one This configuration gives a much higher current gain than

                  each transistor taken separately and in the case of integrated devices

                  can take less space than two individual transistors because they can

                  use a shared collector

                  Integrated Darlington pairs come packaged singly in

                  transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                  The Darlington transistor array used is ULN2003 Applications include relay

                  drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                  drivers and logic buffers Each input of this device has a zener diode and resistor in series

                  to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                  for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                  792 FEATURES

                  The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                  transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                  with common-cathode clamp diodes for switching inductive loads The collector-current

                  rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                  higher current capability

                  710 SERIES VOLTAGE REGULATER IC (78XX)

                  7101 WORKING

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Voltage Regulator (regulator) usually having three legs converts varying input

                  voltage and produces a constant regulated output voltage They are available in a variety of

                  outputs

                  The most common part numbers start with the numbers 78 or 79 and finish with two

                  digits indicating the output voltage The number 78 represents positive voltage and 79

                  negative one The 78XX series of voltage regulators are designed for positive input

                  The LM78XX series typically has the ability to drive current up to 1A For

                  application requirements up to 150mA 78LXX can be used As mentioned above the

                  component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                  an output leg with the regulators voltage

                  As a general rule the input voltage should be limited to 2 to 3 volts above the output

                  voltage The LM78XX series can handle up to 36 volts input be advised that the power

                  difference between the input and output appears as heat If the input voltage is unnecessarily

                  high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                  sinking the regulator will shut down

                  711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                  7111 WORKING

                  The MAX-232 It includes a Charge Pump which generates

                  +10V and -10V from a single 5v supply

                  This IC also includes two receivers and two transmitters in

                  the same package This is handy in many cases when we only want to

                  use the Transmit and Receive data Lines We dont need to use two chips one for the

                  receive line and one for the transmit There are also many variations of these devices The

                  large value of capacitors are not only bulky but also expensive Therefore other devices are

                  available which use smaller capacitors and even some with inbuilt capacitors However the

                  MAX-232 is the most common and thus we will use this RS-232 Level Converter

                  Dual Charge-Pump Voltage Converter

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                  V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                  output

                  712 OPTOCOUPLER IC (4N33)

                  7121 WORKING

                  In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                  photoMOS) is a device that uses a short optical transmission path to transfer a signal

                  between elements of a circuit typically a transmitter and a receiver while keeping them

                  electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                  back to an electrical signal electrical contact along the path is broken

                  Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                  essentially a combination of two distinct devices an optical transmitter typically a gallium

                  arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                  light-triggered diac The two are separated by a transparent barrier which blocks any

                  electrical current flow between the two but does allow the passage of light

                  The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                  silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                  of isolation between driving and load circuits These Optocouplers can be used to replace

                  reed and mercury relays with advantages of long life high speed switching and elimination

                  of magnetic field

                  713 MICROCONTROLLER IC (89V51 RD 2 )

                  713 WORKING

                  The P89V51RD2 is an 80C51 microcontroller with 64

                  kB Flash and 1024 bytes of data RAM

                  A key feature of the P89V51RD2 is its X2 mode option

                  The design engineer can choose to run the application with the conventional 80C51 clock

                  rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  achieve twice the throughput at the same clock frequency Another way to benefit from this

                  feature is to keep the same performance by reducing the clock frequency by half thus

                  dramatically reducing the EMI

                  The Flash program memory supports both parallel programming and in serial In-

                  System Programming (ISP) Parallel programming mode offers gang-programming at high

                  speed reducing programming costs and time to market ISP allows a device to be

                  reprogrammed in the end product under software control The capability to fieldupdate the

                  application firmware makes a wide range of applications possible The P89V51RD2 is also

                  In-Application Programmable (IAP) allowing the Flash program memory to be

                  reconfigured even while the application is running

                  714 RELIMATE CONNECTOR

                  7141 WORKING

                  These are wire to board type connectors used to facilitate

                  proper and firm electrical connection between the relay card and

                  microcontroller card

                  The connector has following specifications

                  No of Ways 2-20

                  Voltage Rating 250V AC DC

                  Current Rating 3A AC DC

                  Contact Resistance 20mW max

                  Insulation Resistance 1000MW min

                  Dielectric Withstanding 1000V ACminute

                  Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                  The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                  connector is it provides a fast and easy connection and disconnection it also avoids polarity

                  conflicts

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  715 RS-232 PORT CONNECTOR

                  7151 WORKING

                  Almost all digital devices which we use require either TTL

                  or CMOS logic levels Therefore the first step to connecting a

                  device to the RS-232 port is to transform the RS-232 levels back

                  into 0 and 5 Volts This is done by RS-232 Level Converters

                  Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                  Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                  The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                  problem in many instances where only a single supply of +5V is present

                  CHAPTER 8

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  IMPLIMENTATION

                  OF THE PCB

                  Components layout designing

                  Developing or Etching the PCB

                  Other operations like Drilling Cutting Tinning

                  81 IMPLIMENTATION OF THE PCB

                  A proper PCB ensure that various circuit components are interconnected as per the

                  circuit diagram once they have been placed on the PCB in their proper positions and

                  subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                  base material to which is permanently attached a flat metallic network of conducting path

                  whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                  for this project is single one

                  The basic material used may be resin coated paper fiber glass ceramic and the flat

                  board configuration however is most widely used and it may be of the nature of the single

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                  which ensures adequate and permanent low resistance coupling

                  811 BOARD DESIGN

                  PCB designed is the most important and requires great care during work In this case

                  great care must be taken while tracing the circuit or layout on the board Because once PCB

                  is designed it is virtually impossible to alter it While designing a circuit designer should

                  take care to avoid crossing of conducting path (tracks) as possible Crossover are

                  unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                  also help to solve this problem when circuit is complicated

                  812 THE MASTER DIAGRAM

                  The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                  which is commonly made twice as the finished circuit since this makes the working on that

                  much easier especially when circuit is complicated photography eventually reduces the

                  size of diagram to that of the circuit before proceeding we must know some rules regarding

                  the designing -

                  a The space between the conductors must be strictly controlled to avoid the possibility

                  of electrical discharges or unwanted capacitance The amount by which the mater

                  diagram is to reduce in size is thus a critical deign feature

                  b The conductor must be wider in those part of the circuits that are going to handle

                  large current must be handle without undue temperature of conductors

                  c The minimum width of copper should not generally be less than about 15mmThis

                  is related to mechanical strength rather than electrical properties and it also ensure

                  that strips remains securely bounded to the base material

                  d The points where the component holes for component lead wire occurs must be sited

                  to suit the dimensions of the component and dimensions between lead-out wire so

                  that the components can be situated correctly on finished board The conductor is

                  also main large at the point of holes

                  813 PCB MAKING

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  When the mater diagram probable twice the size of real PCB has been evolved the

                  test major step consists of etching or dissolving the unwanted metal from copper claded

                  board to create a circuit as depicted by master diagram It must be stressed that very

                  accurate checking master is essential at this stage Then the master point is mounted on a

                  special frame on easy facing of a larger camera and with the aid of the very powerful

                  illumination a master diagram is clearly photographed on a glass sensitive plate This is

                  developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                  brought into operation This comprises the camera body mounted so that sideways after

                  each exposure In this way number of copies of the original master diagram is set out

                  exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                  In case of simple and need of number of less PCB economic and advisable to use the

                  following lab method of PCB making

                  Planning The Circuit

                  It is not a particular difficult There are several important factors that need not be

                  taken into account if the finished device is to work properly we must consider gain factor

                  and ensure that the input and output parts are sufficiently well isolated to avoid the

                  possibility We must also ensure that conductors and components carrying high frequency

                  current are well separated from the part of the circuit We are also to make sure that all

                  components need to return to earth are properly connected and that possibility of common

                  impedance arising earth returned

                  Circuit is totally eliminated by making all earth as substantial possible consistent

                  with nature of design Other factors that have to successfully studied include availability of

                  adequate return points on board and itrsquos mounting from accessibility of switch connection

                  made for mechanical fixing ventilation effect of vibration

                  Cleaning The Board

                  The copper side of the board must be thoroughly cleaned before circuit plan is

                  transferred to it This is important because even slightest trace of graze (from figure of

                  instance) will impure the etching process and when the circuit plan has been neatly

                  transferred to copper in this manner the board is held under running tap and the allowed to

                  dry before resist is applied

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Transforming the Plan

                  Now once cleaning is done plan has to transfer on copper surface of PCB material

                  A convenient way to do this is simply put the carbon paper between a copper surface of the

                  board and working plan and carefully trace the lines of original plan with a ball pen

                  Resist

                  Resist is nothing more than a substrate that is unaffected by presence etching

                  chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                  clearly worked on clean copper that are to be left in fact as the copper conductor must be

                  covered when resists the leaguer type of paints possess good resist properties but

                  disadvantage of relatively long time taken for drying It is essential to resist through

                  hardening before etching is started Nail polished are better as they quickly and are less

                  difficult to remove

                  To overcome this drying effect and to achieve the sharp edge of the trace on the

                  PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                  short circulating due to paints are completely the avoid etching tapes and pads are available

                  in different sizes

                  Correcting Error

                  When a result has been thoroughly hardened any errors that have been made can

                  usually be corrected by gently scratching away with knife To ensure clear out lines round

                  edges of copper conductors on board the resist must be applied with steady band

                  Etching

                  Next comes etching of unwanted copper amp whether a small single is all that is

                  required as quantity of board to be produce certain precautions must be taken before

                  operation is commenced the most used etch amp I ferrite chloride to this is added small

                  quantity of HCL to accelerate But not critical as lab construction concerned A good

                  etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                  grams of water

                  Agitation

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                  the etchant process The depth of liquid must be sufficient to completely cover laminate the

                  laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                  gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                  temperature and thickness of copper foil

                  Finishing Off

                  When all unwanted copper is dissolved from areas between conductor board should

                  be taken from an etchant amp washed in water The resist must be removed using proper

                  solvent After this the copper surface must be polished with any kind of cleaner It should be

                  seen that there is no slight incomplete etching between the conducting parts of the PCB The

                  PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                  This process is called Tinning This process of coating involve track with soldier

                  Advantage of tinning the effect of environment of conductors then PCB is drilled

                  ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                  Assembling On PCB

                  After the holes are drilled the component have to be assembled on PCB before

                  assembling the components it is necessary to clean soldering iron in order to get easy amp

                  accurate soldering Removing impurity particles that are gathered on iron bit due to

                  repetitive use cleans soldering iron

                  CHAPTER 9

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  SOLDERING

                  TECHNIQUE

                  Technique for good soldering

                  91 SOLDERING TECHNIQUE

                  For soldering of any joints first the terminal to be soldered are cleaned to remove

                  oxide film or dirt on it If required flux is applied on the points to be soldered

                  Now the joint to be soldered is heated with the help of soldering iron Heat

                  applied should be such that when solder wire is touched to joint it must melt

                  quickly

                  The joint and the soldering iron is held such that molten solder should flow

                  smoothly over the joint

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  When joint is completely covered with molten solder the soldering iron is re-

                  moved

                  The joint is allowed to cool without any movement

                  The bright shining solder indicates good soldering

                  In case of dry solder joint a air gap remains in between the solder material and

                  the joint It means that soldering is improper This is removed and again solder-

                  ing is done

                  Thus this way all the components are soldered on P C B

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 10

                  PCB LAYOUTS

                  Schematic diagram

                  Bottom and top layout

                  101 POWER SUPPLY CARD

                  1011 SCHIMETIC DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1012 LEGEND MARKING

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                  Fig1011 Schematic diagram of power supply card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1013TOP LAYER

                  1014 BOTTOM LAYER

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                  Fig1013 Top layer of power supply

                  card

                  Fig1014 Schematic diagram of power supply card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  102 BATTERY CHARGER CARD

                  1021 SCHEMATIC DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                  Fig1021 Schematic diagram of battery charger card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  103 RELAY CARD

                  1031 SCHIMETIC DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                  Fig1031 Schematic diagram of Relay card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1032 RELAY CARD LEGEND MARKING

                  1033 TOP LAYER

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                  Fig1032 Legend marking of Relay card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1034 BOTTOM LAYER

                  104 MICROCONTROLER CARD

                  1041 SCHIMETIC DIAGRAM

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                  Fig1034 Bottom layer of Relay card

                  Fig1041 Schematic diagram of microcontroller card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1042 ALL LAYERS

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                  Fig1042 All layer of microcontroller card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 11

                  INTRODUCTION

                  OF SOFTWARE

                  Keil (microVision 2)

                  Eagle (Easily Applicable Graphical Layout Editor)

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  111 Keil (microVision 2)

                  1111 Introduction to C51 Cross Compiler

                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                  generates object code that matches the efficiency and speed of assembly programming

                  Using a high-level language like C has many advantages over assembly language

                  programming

                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                  the memory structure of the 8051 CPU is desirable (but not necessary)

                  Details like register allocation and addressing of the various memory types and data

                  types is managed by the compiler

                  Programs get a formal structure (which is imposed by the C programming language) and

                  can be divided into separate functions This contributes to source code reusability as

                  well as better overall application structure

                  The ability to combine variable selection with specific operations improves program

                  readability

                  Keywords and operational functions that more nearly resemble the human thought

                  process may be used

                  Programming and program test time is drastically reduced

                  The C run-time library contains many standard routines such as formatted output

                  numeric conversions and floating-point arithmetic

                  Existing program parts can be more easily included into new programs because of

                  modular program construction techniques

                  The language C is a very portable language (based on the ANSI standard) that enjoys

                  wide popular support and is easily obtained for most systems Existing program

                  investments can be quickly adapted to other processors as needed

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1112 Software Development Cycle in Keil

                  When we use the Keil Software tools the

                  project development cycle is roughly the same as

                  it is for any other software development project

                  1 Create a project select the target chip from the

                  device database and configure the tool settings

                  2 Create source files in C or assembly

                  3 Build your application with the project

                  manager

                  4 Correct errors in source files

                  5 Test the linked application A block diagram of

                  the complete 8051 tool set may best illustrate the

                  development cycle

                  112 Eagle (Easily Applicable Graphical Layout Editor)

                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                  1121 Schematic Editor

                  In this one can develop amp design circuits for the required PCB

                  1122 Layout Editor

                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                  Fig 111 Software development in KEIL

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1123 Library Editor

                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                  1124 Auto Router

                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                  the PCB tracks designed

                  1125 Cam Processor

                  This is used to finally print the various layers of the designed PCB viz Top Layer

                  Bottom Layer Component Layer Masking Layer etc

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                  Start

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 12

                  INTRODUCTION

                  OF

                  PROGRAMMING

                  Flowchart of programming

                  Program code

                  121 Flowchart

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                  2

                  flag9==1

                  flag9=1

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                  flag11==1

                  flag11=1 flag11=0 flag4=0

                  REady_LED4=0

                  Sw2_op (P01) ==0

                  My delay (10)

                  3 3

                  flag2=1 disp2=1 k2=0

                  3

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                  4

                  flag11==1

                  flag11=0 flag4=0 REady_LED4=0

                  flag11=1

                  My delay (10)

                  flag3=1 disp3=1 k3=0

                  k1==0||k2==0||k4==0

                  Sw3_op (P02) ==0

                  5

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                  flag5==1

                  5

                  flag11==1

                  flag7=1

                  flag7==1

                  flag7=0 flag2=0 REady_LED2=0

                  6

                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                  flag11=0 flag4=0 REady_LED4=0

                  flag11=1

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                  6

                  My delay (10)

                  flag4=1 disp4=1 k4=0

                  k1==0||k2==0||k3==0 flag5==1

                  7

                  Sw4_op (P03) ==0

                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                  7

                  flag7==1

                  flag9==1

                  flag7=1

                  flag7=0 flag2=0 REady_LED2=0

                  flag9=0 flag3=0 REady_LED3=0

                  flag9=1

                  Sw5_op A(P04) ==0

                  My delay (10)

                  8

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                  9

                  flag2==1

                  flag3==1

                  8

                  flag1==1

                  flag4==1 flag5=1 disp5=1

                  flag9=1 disp5=1

                  flag7=1 disp5=1

                  flag11=1 disp5=1

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                  Sw6_op (P05) ==0

                  My delay (10)

                  flag2==1 ampamp flag7==1

                  flag3==1 ampamp flag9==1 9

                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                  flag8=1 disp6=1

                  10

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                  10

                  flag4==1 ampamp flag11==1

                  flag10=1 disp6=1

                  flag12=1 disp6=1

                  flag8==1

                  flag10==1

                  11

                  flag6==1

                  i++

                  l++

                  j++

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                  flag12==1

                  M++

                  11

                  Stop

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  122 Program

                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                  define buzzerP2_0 buzzer indication

                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                  sbit sw5_op=P0^4 input switch5 for coin

                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                  output Led for indication

                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                  function prototype declaration

                  void my_delay(unsigned int value) DELAY FUCTION

                  void init_timer() timer 0 initialization function

                  variable declaration

                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  start of main programme

                  void main()

                  init_timer() call it timer initialization function

                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                  start of while loop

                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                  condition for switch1

                  if(flag1==1) check swich1 pressed if(disp1==1 )

                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                  if(iltk) loop will repeat for desired time of charging

                  if(igt=1000)

                  buzzer=1 turn on buzzer if (ii==20)

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  REady_LED1=1 turn on ready indication of led1

                  else if(ii==40)

                  REady_LED1=0ii=0

                  elseREady_LED1=0

                  START_LED1=1

                  else

                  START_LED1=0

                  k1=1 buzzer=0

                  REady_LED1=0 flag1=0

                  flag5=0flag6=0

                  condition for switch2

                  if(flag2==1) check swich2 pressed if(disp2==1)

                  REady_LED2=1 turn on ready 2 led indication

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  disp2=0

                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                  if(jltk)

                  if(jgt1000) buzzer=1 if(jj==20)

                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                  elseREady_LED2=0

                  START_LED2=1

                  else START_LED2=0

                  REady_LED2=0 k2=1 buzzer=0

                  flag2=0flag7=0flag8=0

                  j=0jj=0

                  condition for switch 3

                  if(flag3==1) check swich3 pressed

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  if(disp3==1 )

                  REady_LED3=1 disp3=0

                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                  if(lltk)

                  if(lgt1000) buzzer=1 if(ll==20)

                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                  elseREady_LED3=0

                  START_LED3=1

                  else START_LED3=0

                  LED2=0 k3=1 buzzer=0

                  REady_LED3=0 flag3=0

                  flag9=0flag10=0

                  l=0ll=0

                  condition for switch 4

                  if(flag4==1) check swich4 pressed if(disp4==1 )

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  REady_LED4=1 disp4=0

                  if(flag11==1) check coin is pressed

                  if(flag12==1) START is pressed

                  if(mltk)

                  if(mgt1000)

                  buzzer=1 if(mm==20)

                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                  elseREady_LED4=0

                  START_LED4=1

                  else START_LED4=0

                  buzzer=0 k4=1

                  REady_LED4=0 flag4=0

                  flag11=0flag12=0

                  m=0mm=0

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  while(1)

                  end of main programme

                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                  whenever specific time the interrupt will generate control will go in following function

                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if(sw1_op==0 ) ready switch flag for system1

                  my_delay(10) CALL DELAY FUNCTION

                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                  if(flag7==1) SET THE FLAG

                  flag7=1

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                  flag9=1

                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                  flag11=1

                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if(sw2_op==0 ) fready switch flag for system2

                  my_delay (10)

                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                  if(flag5==1)

                  flag5=1

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                  flag9=1

                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                  flag11=1

                  elseflag11=0flag4=0REady_LED4=0

                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                  if(flag7==1)

                  flag7=1

                  else

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                  flag5=1

                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                  flag11=1

                  elseflag11=0flag4=0REady_LED4=0

                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                  if(flag7==1)

                  flag7=1

                  elseflag7=0

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  flag2=0REady_LED2=0 if(flag5==1)

                  flag5=1

                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                  flag9=1

                  elseflag9=0flag3=0REady_LED3=0

                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                  if(flag6==1)

                  i++ if (igt1000) ii++

                  if (flag8==1)

                  j++ if(jgt1000) jj++

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  if (flag10==1)

                  l++ if (lgt1000) ll++

                  if (flag12==1)

                  m++ if (mgt1000) mm++

                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 13

                  TROUBLE SHOOT

                  Troubleshoot

                  131 TROUBLE SHOOT

                  A newly assembled circuit does not work may be due to -

                  Faulty components

                  Improper soldering

                  Wrong connections

                  Also any stop in working after some period may be due to -

                  Component failure

                  Supply failure

                  Damaging of PCB

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Fault finding is very essential if you want the circuit to operate properly

                  If a newly assembled circuit is not working properly check all the components and

                  circuit connections according to the diagram The circuit may not be working due to wrong

                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                  proper soldering

                  If faults are not observed during physical observations one should proceed for Hot

                  test ie Voltage measurement at different points for example at Input terminal etc

                  Resistance measurement is also done which is known as Dry test

                  During this project work some green LEDs was not glow then we checked it

                  continuity and replace it

                  Also relay was not properly worked therefore we replaced it Some ICs was get

                  heated after starting the project It happens because of some soldering points are shorted

                  during soldering PCB We solved that problem

                  CHAPTER 14

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  ADVANTAGES OF

                  THE PROJECT

                  Advantages

                  141 ADVANTAGES OF THE PROJECT

                  Simple and hand efficient Microcontroller based system

                  Fast charging capacity

                  Simple to operate

                  Ease of mobility

                  Facilitates connectivity for 90 of cellular phones

                  Less expensive

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Reduced man power

                  Low power consumption

                  It can offer emergency charging for 4sets of handsets synchronously

                  CHAPTER 15

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  DISADVANTAGES

                  OF THE PROJECT

                  Disadvantages

                  151 DISADVANTAGES OF THE PROJECT

                  It requires mains supply to work project

                  Due to limited charging channels till now there may be a possibility that

                  mobile phones of few brands cannot be connected for charging For this

                  purpose we have to use separate connectors for that specific brand differently

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                  min

                  It does not have battery backup therefore it cannot be portable

                  CHAPTER 16

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  APPLICATIONS OF

                  THE PROJECT

                  Application

                  161 APPLICATIONS OF THE PROJECT

                  The coin based mobile phone charger is very useful to public for using coin to

                  charge for the mobile phone in any places

                  It is used for emergency charging purposes

                  It can be installed in malls railway stations bus stops and other public

                  places

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  The charger offers a unique revenue opportunity for a vast range of

                  businesses - from airports to pubs from universities to health clubs virtually

                  any location where there is a high footfall creating a large number of

                  potential users

                  It can be installed in offices and collages for pay charging facility

                  CHAPTER 17

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  FUTURE

                  DEVELOPMENT OF

                  THE PROJECT

                  FUTURE DEVELOPMENT OF THE PROJECT

                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                  This project is very useful to people who are using mobile phone without charging

                  condition in public places

                  It will use with a stereo advertisement carrier that can display video advertisement

                  It will provide battery backup for make it portable

                  It will also provide SMS system in future

                  We can also increase the charging time by editing software of the project

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 18

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  COST ANALYSIS

                  OF THE PROJECT

                  COST ANALYSIS OF THE PROJECT

                  181 COST ANALYSIS OF THE PROJECT

                  1811 Component list for power supply card

                  Footprint Quantity Designators Rate

                  Resistor

                  22K 1 R2 1

                  1K 1 R1 1

                  Capacitor

                  1000uf25V 1 C5 10

                  2200uf25V 1 C1 10

                  022uf 2 C6 C2 1

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                  Table 1811 Component list for power supply card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  01uf 2 C4 C3 1

                  IC

                  BRIDGE W10 2 BR2 BR1 10

                  L7812CV (TO-220) 1 U2 8

                  L7805CV (TO-220) 1 U1 8

                  Connector

                  CON PHO 2PIN 2 J3 J2 16

                  CON PHO 3PIN 1 J1 12

                  LED3mm red 2 L1 L2 15

                  Heat sink (TO-220) 2 16

                  Total 955

                  1812 Component list for battery charger card

                  Footprint Quantity Rate

                  Capacitor

                  2200uf25V 1 1000

                  022uf 4 100

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  01uf 4 100

                  IC

                  BRIDGE W10 1 500

                  L7805CV (TO-220) 4 3200

                  Connector

                  CON PHO 2PIN 1 800

                  Relimate 2 pin 1 400

                  relimate 3 pin 4 2000

                  Heat sink (TO-220) 4 1200

                  TOTAL 9300

                  1813 Component list for Relay card

                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                  Table 1812Component list for battery charger card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                  Total 18900

                  1814Component list for controller card

                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                  Table 1813Component list for relay card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                  total 27000

                  1815 Miscellaneous material

                  Material Quantity Rate

                  electronic item

                  Transformer

                  TXR1 0-9-15 1 20000

                  0-9 1A

                  0-15 100mA

                  TXR2 0-9 1 16500

                  0-9 1A

                  Proximity switch 1 20000

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                  Table 1814Component list for microcontroller card

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Red push bottom 4 4000

                  Green push button 1 1000

                  Red led 5mm 4 800

                  Green led 5mm 4 800

                  Led holder 8 1600

                  Copper clad 2 4000

                  3 core cable 1 meter 1500

                  3 pin plug 1 3000

                  2 pin relimate wire 19 9000

                  3 pin relimate wire 5 3750

                  4 pin relimate wire 2 2000

                  mechanical items

                  Enclosure 1 25000

                  Acrylic sheet 2 X 1 30000

                  12mm cable gland 1 1000

                  Screw 3mm 33 2000

                  Screw 35mm 6 2400

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  10 mm spacers 100 1500

                  10mm insert to stud 50 10000

                  cable tie 2500

                  Total 162350

                  CHAPTER 19

                  APPENDIX

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                  Table 1815Component list for miscellaneous material

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  APPENDIX

                  191 APPENDIX

                  1911 78xx IC datasheet

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1912 W10 datasheet

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1913 4n33 IC datasheet

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                  1914 MAX 232

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1915 ULN2003a IC datasheet

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  1916 89V51RD2 IC datasheet

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 20

                  CONCLUSION

                  CONCLUSION

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  201 CONCLUSION

                  The coin-operated mobile phone charger is already successfully installed in

                  hundreds of locations worldwide providing a unique service to the public and a source of

                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                  installed in any business premises

                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                  from airports to pubs from universities to health clubs virtually any location where there is

                  a high footfall creating a large number of potential users

                  The charger can charge up to 4 different mobile phones simultaneously It will

                  extend low mobile phone talk time provide battery charging

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 21

                  IMAGES OF THE

                  PROJECT

                  Images of the project

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  211 IMAGES OF THE PROJECT

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                  fig211 lsquoCoin operated mobile battery charger

                  Fig212 Circuit arrangement of coin operated mobile battery charger

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Fig 216 Relay driver circuit

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                  Fig 213 Constant voltage battery charger circuit

                  Fig214 Power supply circuit

                  Fig215 Metal detector proximity switch

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Fig217 Microcontroller circuit

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  Fig228 coin operated mobile battery charger project presentation

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  CHAPTER 22

                  BIBILOGRAPHY

                  BIBLIOGRAPHY

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                  221 BIBLIOGRAPHY

                  BOOKS

                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                  INTERNET LINKS

                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                  • CHAPTER 1

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    41 Block Diagram

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 10

                    Fig 41 Block diagram of the project

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    42 Brief Explanation

                    421 POWER SUPPLY

                    Power supply is used to deliver power to the circuit It delivers +5Vdc to

                    microcontroller and other peripherals and +12Vdc delivers power to relay

                    422 COIN INPUT AND LEVEL CONVERTOR

                    Coin input is a sensor which senses a metal and produces an output voltage This

                    voltage is high as compared to the input required for microcontroller

                    Hence a level shifter is used to bring down the voltage level which could be

                    readable to microcontroller

                    423 START SWITCH

                    Start switch is used to start the charging process of a

                    mobile phone

                    424 RS232 INTERFACING TO PC

                    RS 232 is a protocol used for communication between

                    computer and microcontroller It is also used for

                    programming the microcontroller in its ISP (in system

                    programming) mode

                    425 CHANNEL READY INDICATOR

                    It provides visual indication for the channel which is in

                    charging mode

                    426 DARLINGTON PAIR ARRAY

                    Darlington pair array is used as a relay driver

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    427 CHANNEL IN CHARGE INDICATION

                    It provides visual indication for the channel which is in

                    charging mode

                    428 RELAY ARRAY

                    Relay array consists of relays for each channel to

                    provide electromechanical switching in between charger and

                    mobile phone

                    429 CHARGER ARRAY

                    Charger array is used to provide charging power to the

                    mobile phones through the electromechanical switches

                    4210 CELL PHONE TO CHARGE

                    Channel select switch is used for selecting a channel on

                    which the mobile phone is to be charged

                    4211 MICROCONTROLLER

                    Microcontroller is used to control the whole operation of

                    the device Microcontroller reads input signal from input

                    device and triggers the output device According to the

                    conditions defined in the microcontroller by the programmer

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 5

                    CIRCUIT

                    DIAGRAM

                    EXPLANATION

                    Circuit diagram

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Circuit diagram explanation Working

                    51 POWER SUPPLY CIRCUIT

                    511 CIRCUIT DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                    Fig51 Circuit diagram of the power supply

                    Bridge RectifierTRANSFORMER

                    Filter Voltage regulator Load

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    512 WORKING

                    Transformer

                    A step-down transformer is used to achieve our requirements of the power

                    supply It steps down high voltage ac mains to low voltage ac mains

                    Bridge Rectifier

                    A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                    full wave rectification This is a widely used configuration both with individual

                    diodes wired and with single component bridges where the diode bridge is wired

                    internally It also converts ac to dc but the dc output is varying

                    One advantage of a bridge rectifier over a conventional full-wave rectifier is

                    that with a given transformer the bridge rectifier produces a voltage output that is

                    nearly twice that of the conventional full-wave circuit

                    Filter

                    The output of the rectifier is a pulsating dc wave We need a constant dc

                    output To do this we need to filter out the oscillation from the pulsating dc wave

                    This is obtained with a diode capacitor combination

                    Voltage Regulator

                    A voltage regulator is used for voltage regulation in the circuit This provides

                    a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                    dc output to fixed voltages

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                    Fig 52 Block diagram of the power supply

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Load

                    The load can be anything which wants to switch ON by using power supply

                    513 CIRCUIT DIAGRAM EXPLANATION

                    Regulated power supplies are commonly used in engineering projects Power

                    supply is food of any circuit

                    +5V SUPPLY UNIT

                    +5V supply is obtained from the +5V supply unit for microcontroller and

                    digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                    transformer having a capacity of 500mA

                    Since the input voltage to the regulator IC should be more than its output

                    voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                    of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                    smooth DC supply The rating of the chosen capacitor filter is 1000microF

                    The regulated DC voltage is obtained by using a regulator IC 7805 In the

                    case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                    Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                    output of regulator IC to eliminate the voltage oscillations at the output due to the large

                    voltage oscillations at the input of the regulator

                    +12V SUPPLY UNIT

                    The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                    arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                    step down transformer having a capacity of 1A and the center tap of the transformer is

                    grounded This low voltage is rectified with the help off bridge rectifier

                    Since the input voltage to the regulator IC should be more than its output

                    voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                    the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                    filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                    For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                    7912 is used

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                    the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                    connected at the output as shown in figure to eliminate the voltage oscillations at the

                    output due to the large voltage oscillations at the input of the regulator

                    52 CONSTANT VOLTAGE CHARGER

                    521 CIRCUIT DIAGRAM

                    Fig 53 Circuit diagram of the battery charger

                    522 CIRCUIT DIAGRAM EXPLANATION

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Constant-voltage (often called constant-potential) chargers maintain nearly the same

                    voltage input to the battery throughout the charging process regardless of the batterys state

                    of charge Constant-voltage chargers provide a high initial current to the battery because of

                    the greater potential difference between the battery and charger

                    A constant-voltage charger may return as much as 70 of the previous discharge in

                    the first 30 minutes This proves useful in many battery applications involving multiple

                    discharge scenarios As the battery charges its voltage increases quickly This reduces the

                    potential that has been driving the current with a corresponding rapid decrease in charge

                    current as depicted in the illustration below As a result even though the battery reaches

                    partial charge quickly obtaining a full charge requires prolonged charging

                    Given this behavior constant-voltage chargers are frequently found in applications

                    that normally allow extended charging periods to attain full charge Constant-voltage

                    chargers should not be used where there is frequent cycling of the battery Repeated

                    discharges without returning the cell to its full charge will eventually decrease the battery

                    capacity and may damage individual cells

                    Fig 54An Illustration graph of the charging function of constant battery charger

                    Constant-voltage chargers are most often used in two very different modes as a fast

                    charger to restore a high percentage of charge in a short time or as a float charger to

                    minimize the effects of overcharge on batteries having infrequent discharges

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    53 RELAY DRIVER CIRCUIT

                    531 CIRCUIT DIAGRAM

                    532 CIRCUIT DIAGRAM EXPLANATION

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                    Fig 55 Relay driver circuit

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Input from the controller is connected to the relay card through connector J1 which

                    carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                    pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                    These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                    relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                    series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                    and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                    relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                    NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                    3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                    RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                    is used to connect power supply to relay card

                    533 WORKING

                    While taking Relay1 (RL1) into consideration we will discuss the working of relay

                    card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                    of the IC are in cut off region which causes an open circuit so there is no current flow

                    flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                    applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                    completes the path ie provide ground to the relay coil so the current flows through the

                    LED activating the relay

                    As the current flows through the relay coil it gets energized and switch over the

                    contacts ie common and normally open contact get connected and provide a path to flow

                    current from J11 ie charger into the load connected at J4 hence the cell phone charging

                    process starts The same above process is applies for all relays If LED is fused or

                    damaged the path will be open and relay will not be energized and if relay is damaged the

                    led will not be illuminated So the LED here is used as a FAULT indicator and a

                    CHARGING ON indicator

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    54 MICROCONTORLLER CIRCUIT

                    541 CIRCUIT DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    542 CIRCUIT DIAGRAM EXPLANATION

                    CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                    the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                    port P04 through J4 and START switch is connected to port P05 through SW5

                    Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                    P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                    Output for relay card is taken on port P14 to P17

                    Components C1 R1 and push button S1 forms reset circuit which provides a power

                    on reset for the micro controller and even provide manual reset Crystal XL1 is a

                    110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                    22pf capacitor used as loading capacitor for crystal

                    Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                    RN2 resistance network

                    IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                    the proximity switch and microcontroller and convert its output readable to microcontroller

                    IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                    communication between PC and a microcontroller through connector J3

                    Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                    communication process

                    Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                    power supply connection

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    543 PORT ASSIGNMENTS FOR 89V51RD2FN

                    P00 = switch1 for channel 1

                    P01 = switch2 for channel 2

                    P02 = switch3 for channel 3

                    P03 = switch4 for channel 4

                    P04 = switch5 for coin input sensor (proximity switch)

                    P05 = switch6 for start charging

                    P10 = channel 1 red LED1 (ready system)

                    P11 = channel 2 red LED2 (ready system2)

                    P12 = channel 3 red LED3 (ready system3)

                    P13 = channel 4 red LED4 (ready system4)

                    P14 = channel 1 relay (start system1)

                    P15 = channel 2 relay (start system2)

                    P16 = channel 3 relay (start system3)

                    P17 = channel 4 relay (start system4)

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 6

                    LIST OF THE

                    COMPONENTS

                    List of the components

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    61 LIST OF THE COMPONETS

                    RESISTORS

                    CAPACITORS

                    LIGHT EMITING DIODES (LEDS)- Green Red

                    RELAYrsquoS-

                    TRANSFORMERS

                    RECTIFIER BRIDGES (W 10)

                    OSCILLATOR

                    SWITCHES- Push switches

                    DARLINGTON PAIR IC (ULN2003a)

                    SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                    SERIAL COMMUNICATION DRIVER IC (MAX 232)

                    OPTOCOUPLER IC (4N33)

                    MICROCONTROLLER IC (89V51 RD2)

                    RELIMATE CONNECTOR- 2 pin amp 4 pin

                    RS-232 PORT CONNECTOR

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 7

                    INTRODUCTION

                    OF COMPONENTS

                    Working of components

                    Features or Uses of components

                    Testing of components

                    71 RESISTOR

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    711 WORKING

                    Resistors limit current Resistors are considered to be the most used and the most

                    important component of all the electronic circuits Resistors resist the flow of electrical

                    current The higher the value of resistance (measured in ohms)

                    the lower the current will be

                    712 TESTING

                    Read the indicated color code value then select the OHM-scale within but not way

                    below the indicated value A resistor is good if its resistance is close to the indicated

                    Tolerance should be considered with the ohmmeter reading While no resistance reading at

                    all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                    ohmmeter scale settings resistor is shorted

                    713 SPECIFICATIONS

                    To completely specify a resistors characteristics requires knowledge of the following

                    parameters-

                    bull Value

                    bull Tolerance

                    bull Temperature Coefficient

                    bull Power Rating

                    The specification of a resistor may be marked on its surface using either of two

                    systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                    the second more recent system uses a combination of alpha-numeric characters

                    7 2 CAPACITOR

                    721 WORKING

                    When DC voltage is applied to the capacitor an electric charge is stored on each

                    electrode While the capacitor is charging up current flows The current will stop flowing

                    when the capacitor has fully charged Capacitors find use

                    in circuits for a variety of purposes They are used in

                    time delay generation RC circuits In power supplies for filtering and power supply

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    decoupling as blocking capacitors for power factor correction and motor starting in LC

                    tank circuits and so on

                    722 TESTING

                    To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                    negative probe to the capacitor positive terminal the positive probe to the negative terminal

                    A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                    and moves back again to infinite resistance position A defective indication for an

                    electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                    which is an indication that the capacitor is shorted

                    73 LIGHT EMITING DIODE (LED)

                    731 WORKING

                    LEDs are special diodes that emit light when

                    connected in a circuit They are frequently used as pilot lights in electronic appliances to

                    indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                    the heart of an LED the semi-conductor chip

                    In our project Green LED are used here for mainly two purpose

                    a Charging ON indication (when ON)

                    b Channel fault indication (always OFF)

                    732 TESTING

                    The good and working LED will then light up or glow a busted LED will not LEDs

                    must have a resistor in series to limit the current to a safe value for quick testing purposes a

                    1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                    directly connected to a battery or power supply It will be destroyed the LED

                    733 FEATURES

                    Single color

                    High bright output

                    Low power consumption

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    High reliability and long life

                    734 Descriptions

                    Dice material GaInN

                    Emitting Color Super Bright White

                    Device Outlineφ5mm Round Type

                    Lens Type Water Clear

                    74 RELAY

                    741 WORKING

                    A relay is an electrically operated switch Current

                    flowing through the coil of the relay creates a magnetic field

                    which attracts a lever and changes the switch contacts The coil

                    current can be on or off so relays have two switch positions and

                    most have double throw (changeover) switch contacts

                    Relays are like remote control switches and are used in

                    many applications because of their relative simplicity long life

                    and proven high reliability

                    742 USES

                    The main operation of a relay comes in places where only a low-power signal can be

                    used to control a circuit

                    It is also used in places where only one signal can be used to control a lot of circuits

                    The application of relays started during the invention of telephones They played an

                    important role in switching calls in telephone exchanges They were also used in

                    long distance telegraphy They were used to switch the signal coming from one

                    source to another destination

                    743 TESTING

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    A relay will usually have a coil pole terminal and a set of

                    contacts The set of contacts that are open when the relay is not

                    energized are called normally open (NO) contacts and the set of

                    contacts that are closed when the relay is not energized are called

                    normally closed (NC) contacts The following steps can be used to perform the testing of

                    the relay using a multimeter

                    Keep the multimeter in the continuity check mode

                    Check for continuity between the NC contacts and pole

                    Check for discontinuity between NO contacts and the pole

                    Now energies the relay using the rated voltage For example use a 9V battery for

                    energizing a 9V relay The relay will engage with clicking sound

                    Now check for continuity between NO contacts and pole

                    Also check for discontinuity between NC contacts and pole

                    As a final test measure the resistance of the relay coil using a multimeter and check

                    whether it is matching to the value stated by the manufacturer

                    If all the above tests are positive we can conclude that the relay is healthy

                    75 TRANSFORMER

                    751 WORKING

                    A transformer is a device that transfers electrical energy

                    from one circuit to another through inductively coupled

                    electrical conductors A changing current in the first circuit (the

                    primary) creates a changing magnetic field

                    This changing magnetic field induces a changing voltage in the second circuit (the

                    secondary) This effect is called mutual induction

                    If a load is connected to the secondary circuit electric charge will flow in the

                    secondary winding of the transformer and transfer energy from the primary circuit to the

                    load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                    of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                    number of primary turns

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    By appropriate selection of the numbers of turns a transformer thus allows an

                    alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                    making it less

                    752 TESTING

                    1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                    scale and then adjusting the knob to verify its reading is an easy step to the

                    reading of the ohm

                    2 To check the resistance of the coil unplug or unsolder the leads of the

                    transformer from its circuit and measure the resistance of each coil

                    3 The next step is to test each coil for shorts to other coils

                    76 RECTIFIER BRIDGE (W 10)

                    761 WORKING

                    A diode bridge rectifier is a device for converting AC or

                    alternating current electricity into DC or direct current AC

                    electricity goes from positive to negative constantly whereas DC

                    always flows in the same direction

                    AC electricity is more efficient to transmit and easier to

                    convert into different voltages However most appliances need DC current to run A diode

                    bridge rectifier is the most common type of power supply used to provide this current In

                    our project W10 is a bridge rectifier which provides on single semiconductor chip

                    77 OSCILLATOR

                    771 Working

                    An oscillator puts out an endless series of pulses The output

                    constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    all digital circuits have some type of oscillator This stream of output pulses is often

                    called a clock One of the most important features of any oscillator is its frequency stability

                    or in other words its ability to provide a constant frequency output under varying load

                    conditions Some of the factors that affect the frequency stability of an oscillator include

                    temperature variations in the load and changes in the DC power supply Frequency stability

                    of the output signal can be improved by the proper selection of the components used for the

                    resonant feedback circuit including the amplifier but there is a limit to the stability that can

                    be obtained from normal LC and RC tank circuits

                    In our project instead of 12MHz crystal 110592MHz is used because it can be

                    divided to give you exact clock rates for most of the common baud rates for the UART

                    especially for the higher speeds (9600 19200) These crystals are readily available and

                    commonly used

                    78 SWITCH

                    781 WORKING

                    The most familiar form of switch is a manually operated

                    electromechanical device with one or more sets of electrical contacts

                    Each set of contacts can be in one of two states either closed meaning

                    the contacts are touching and electricity can flow between them or

                    open meaning the contacts are separated and the switch is non

                    conducting The mechanism actuating the transition between these two

                    states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                    momentary (push-for on or push-for off) type

                    782 USES

                    In electronics a switch is an electrical component that can break an electrical

                    circuit interrupting the current or diverting it from one conductor to another

                    783 TESTING

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    When the switch is ON it looks and acts like a wire When the switch is OFF there is

                    no connection Switch can tested by using multimeter in continuity range

                    79 DARLINGTON PAIR IC (ULN2003a)

                    791 WORKING

                    The Darlington transistor (often called a Darlington pair) is a

                    compound structure consisting of two bipolar transistors (either

                    integrated or separated devices) connected in such a way that the

                    current amplified by the first transistor is amplified further by the

                    second one This configuration gives a much higher current gain than

                    each transistor taken separately and in the case of integrated devices

                    can take less space than two individual transistors because they can

                    use a shared collector

                    Integrated Darlington pairs come packaged singly in

                    transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                    The Darlington transistor array used is ULN2003 Applications include relay

                    drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                    drivers and logic buffers Each input of this device has a zener diode and resistor in series

                    to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                    for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                    792 FEATURES

                    The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                    transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                    with common-cathode clamp diodes for switching inductive loads The collector-current

                    rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                    higher current capability

                    710 SERIES VOLTAGE REGULATER IC (78XX)

                    7101 WORKING

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Voltage Regulator (regulator) usually having three legs converts varying input

                    voltage and produces a constant regulated output voltage They are available in a variety of

                    outputs

                    The most common part numbers start with the numbers 78 or 79 and finish with two

                    digits indicating the output voltage The number 78 represents positive voltage and 79

                    negative one The 78XX series of voltage regulators are designed for positive input

                    The LM78XX series typically has the ability to drive current up to 1A For

                    application requirements up to 150mA 78LXX can be used As mentioned above the

                    component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                    an output leg with the regulators voltage

                    As a general rule the input voltage should be limited to 2 to 3 volts above the output

                    voltage The LM78XX series can handle up to 36 volts input be advised that the power

                    difference between the input and output appears as heat If the input voltage is unnecessarily

                    high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                    sinking the regulator will shut down

                    711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                    7111 WORKING

                    The MAX-232 It includes a Charge Pump which generates

                    +10V and -10V from a single 5v supply

                    This IC also includes two receivers and two transmitters in

                    the same package This is handy in many cases when we only want to

                    use the Transmit and Receive data Lines We dont need to use two chips one for the

                    receive line and one for the transmit There are also many variations of these devices The

                    large value of capacitors are not only bulky but also expensive Therefore other devices are

                    available which use smaller capacitors and even some with inbuilt capacitors However the

                    MAX-232 is the most common and thus we will use this RS-232 Level Converter

                    Dual Charge-Pump Voltage Converter

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                    V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                    output

                    712 OPTOCOUPLER IC (4N33)

                    7121 WORKING

                    In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                    photoMOS) is a device that uses a short optical transmission path to transfer a signal

                    between elements of a circuit typically a transmitter and a receiver while keeping them

                    electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                    back to an electrical signal electrical contact along the path is broken

                    Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                    essentially a combination of two distinct devices an optical transmitter typically a gallium

                    arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                    light-triggered diac The two are separated by a transparent barrier which blocks any

                    electrical current flow between the two but does allow the passage of light

                    The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                    silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                    of isolation between driving and load circuits These Optocouplers can be used to replace

                    reed and mercury relays with advantages of long life high speed switching and elimination

                    of magnetic field

                    713 MICROCONTROLLER IC (89V51 RD 2 )

                    713 WORKING

                    The P89V51RD2 is an 80C51 microcontroller with 64

                    kB Flash and 1024 bytes of data RAM

                    A key feature of the P89V51RD2 is its X2 mode option

                    The design engineer can choose to run the application with the conventional 80C51 clock

                    rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    achieve twice the throughput at the same clock frequency Another way to benefit from this

                    feature is to keep the same performance by reducing the clock frequency by half thus

                    dramatically reducing the EMI

                    The Flash program memory supports both parallel programming and in serial In-

                    System Programming (ISP) Parallel programming mode offers gang-programming at high

                    speed reducing programming costs and time to market ISP allows a device to be

                    reprogrammed in the end product under software control The capability to fieldupdate the

                    application firmware makes a wide range of applications possible The P89V51RD2 is also

                    In-Application Programmable (IAP) allowing the Flash program memory to be

                    reconfigured even while the application is running

                    714 RELIMATE CONNECTOR

                    7141 WORKING

                    These are wire to board type connectors used to facilitate

                    proper and firm electrical connection between the relay card and

                    microcontroller card

                    The connector has following specifications

                    No of Ways 2-20

                    Voltage Rating 250V AC DC

                    Current Rating 3A AC DC

                    Contact Resistance 20mW max

                    Insulation Resistance 1000MW min

                    Dielectric Withstanding 1000V ACminute

                    Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                    The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                    connector is it provides a fast and easy connection and disconnection it also avoids polarity

                    conflicts

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    715 RS-232 PORT CONNECTOR

                    7151 WORKING

                    Almost all digital devices which we use require either TTL

                    or CMOS logic levels Therefore the first step to connecting a

                    device to the RS-232 port is to transform the RS-232 levels back

                    into 0 and 5 Volts This is done by RS-232 Level Converters

                    Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                    Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                    The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                    problem in many instances where only a single supply of +5V is present

                    CHAPTER 8

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    IMPLIMENTATION

                    OF THE PCB

                    Components layout designing

                    Developing or Etching the PCB

                    Other operations like Drilling Cutting Tinning

                    81 IMPLIMENTATION OF THE PCB

                    A proper PCB ensure that various circuit components are interconnected as per the

                    circuit diagram once they have been placed on the PCB in their proper positions and

                    subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                    base material to which is permanently attached a flat metallic network of conducting path

                    whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                    for this project is single one

                    The basic material used may be resin coated paper fiber glass ceramic and the flat

                    board configuration however is most widely used and it may be of the nature of the single

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                    which ensures adequate and permanent low resistance coupling

                    811 BOARD DESIGN

                    PCB designed is the most important and requires great care during work In this case

                    great care must be taken while tracing the circuit or layout on the board Because once PCB

                    is designed it is virtually impossible to alter it While designing a circuit designer should

                    take care to avoid crossing of conducting path (tracks) as possible Crossover are

                    unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                    also help to solve this problem when circuit is complicated

                    812 THE MASTER DIAGRAM

                    The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                    which is commonly made twice as the finished circuit since this makes the working on that

                    much easier especially when circuit is complicated photography eventually reduces the

                    size of diagram to that of the circuit before proceeding we must know some rules regarding

                    the designing -

                    a The space between the conductors must be strictly controlled to avoid the possibility

                    of electrical discharges or unwanted capacitance The amount by which the mater

                    diagram is to reduce in size is thus a critical deign feature

                    b The conductor must be wider in those part of the circuits that are going to handle

                    large current must be handle without undue temperature of conductors

                    c The minimum width of copper should not generally be less than about 15mmThis

                    is related to mechanical strength rather than electrical properties and it also ensure

                    that strips remains securely bounded to the base material

                    d The points where the component holes for component lead wire occurs must be sited

                    to suit the dimensions of the component and dimensions between lead-out wire so

                    that the components can be situated correctly on finished board The conductor is

                    also main large at the point of holes

                    813 PCB MAKING

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    When the mater diagram probable twice the size of real PCB has been evolved the

                    test major step consists of etching or dissolving the unwanted metal from copper claded

                    board to create a circuit as depicted by master diagram It must be stressed that very

                    accurate checking master is essential at this stage Then the master point is mounted on a

                    special frame on easy facing of a larger camera and with the aid of the very powerful

                    illumination a master diagram is clearly photographed on a glass sensitive plate This is

                    developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                    brought into operation This comprises the camera body mounted so that sideways after

                    each exposure In this way number of copies of the original master diagram is set out

                    exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                    In case of simple and need of number of less PCB economic and advisable to use the

                    following lab method of PCB making

                    Planning The Circuit

                    It is not a particular difficult There are several important factors that need not be

                    taken into account if the finished device is to work properly we must consider gain factor

                    and ensure that the input and output parts are sufficiently well isolated to avoid the

                    possibility We must also ensure that conductors and components carrying high frequency

                    current are well separated from the part of the circuit We are also to make sure that all

                    components need to return to earth are properly connected and that possibility of common

                    impedance arising earth returned

                    Circuit is totally eliminated by making all earth as substantial possible consistent

                    with nature of design Other factors that have to successfully studied include availability of

                    adequate return points on board and itrsquos mounting from accessibility of switch connection

                    made for mechanical fixing ventilation effect of vibration

                    Cleaning The Board

                    The copper side of the board must be thoroughly cleaned before circuit plan is

                    transferred to it This is important because even slightest trace of graze (from figure of

                    instance) will impure the etching process and when the circuit plan has been neatly

                    transferred to copper in this manner the board is held under running tap and the allowed to

                    dry before resist is applied

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Transforming the Plan

                    Now once cleaning is done plan has to transfer on copper surface of PCB material

                    A convenient way to do this is simply put the carbon paper between a copper surface of the

                    board and working plan and carefully trace the lines of original plan with a ball pen

                    Resist

                    Resist is nothing more than a substrate that is unaffected by presence etching

                    chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                    clearly worked on clean copper that are to be left in fact as the copper conductor must be

                    covered when resists the leaguer type of paints possess good resist properties but

                    disadvantage of relatively long time taken for drying It is essential to resist through

                    hardening before etching is started Nail polished are better as they quickly and are less

                    difficult to remove

                    To overcome this drying effect and to achieve the sharp edge of the trace on the

                    PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                    short circulating due to paints are completely the avoid etching tapes and pads are available

                    in different sizes

                    Correcting Error

                    When a result has been thoroughly hardened any errors that have been made can

                    usually be corrected by gently scratching away with knife To ensure clear out lines round

                    edges of copper conductors on board the resist must be applied with steady band

                    Etching

                    Next comes etching of unwanted copper amp whether a small single is all that is

                    required as quantity of board to be produce certain precautions must be taken before

                    operation is commenced the most used etch amp I ferrite chloride to this is added small

                    quantity of HCL to accelerate But not critical as lab construction concerned A good

                    etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                    grams of water

                    Agitation

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                    the etchant process The depth of liquid must be sufficient to completely cover laminate the

                    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                    temperature and thickness of copper foil

                    Finishing Off

                    When all unwanted copper is dissolved from areas between conductor board should

                    be taken from an etchant amp washed in water The resist must be removed using proper

                    solvent After this the copper surface must be polished with any kind of cleaner It should be

                    seen that there is no slight incomplete etching between the conducting parts of the PCB The

                    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                    This process is called Tinning This process of coating involve track with soldier

                    Advantage of tinning the effect of environment of conductors then PCB is drilled

                    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                    Assembling On PCB

                    After the holes are drilled the component have to be assembled on PCB before

                    assembling the components it is necessary to clean soldering iron in order to get easy amp

                    accurate soldering Removing impurity particles that are gathered on iron bit due to

                    repetitive use cleans soldering iron

                    CHAPTER 9

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    SOLDERING

                    TECHNIQUE

                    Technique for good soldering

                    91 SOLDERING TECHNIQUE

                    For soldering of any joints first the terminal to be soldered are cleaned to remove

                    oxide film or dirt on it If required flux is applied on the points to be soldered

                    Now the joint to be soldered is heated with the help of soldering iron Heat

                    applied should be such that when solder wire is touched to joint it must melt

                    quickly

                    The joint and the soldering iron is held such that molten solder should flow

                    smoothly over the joint

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    When joint is completely covered with molten solder the soldering iron is re-

                    moved

                    The joint is allowed to cool without any movement

                    The bright shining solder indicates good soldering

                    In case of dry solder joint a air gap remains in between the solder material and

                    the joint It means that soldering is improper This is removed and again solder-

                    ing is done

                    Thus this way all the components are soldered on P C B

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 10

                    PCB LAYOUTS

                    Schematic diagram

                    Bottom and top layout

                    101 POWER SUPPLY CARD

                    1011 SCHIMETIC DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1012 LEGEND MARKING

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                    Fig1011 Schematic diagram of power supply card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1013TOP LAYER

                    1014 BOTTOM LAYER

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                    Fig1013 Top layer of power supply

                    card

                    Fig1014 Schematic diagram of power supply card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    102 BATTERY CHARGER CARD

                    1021 SCHEMATIC DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                    Fig1021 Schematic diagram of battery charger card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    103 RELAY CARD

                    1031 SCHIMETIC DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                    Fig1031 Schematic diagram of Relay card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1032 RELAY CARD LEGEND MARKING

                    1033 TOP LAYER

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                    Fig1032 Legend marking of Relay card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1034 BOTTOM LAYER

                    104 MICROCONTROLER CARD

                    1041 SCHIMETIC DIAGRAM

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                    Fig1034 Bottom layer of Relay card

                    Fig1041 Schematic diagram of microcontroller card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1042 ALL LAYERS

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                    Fig1042 All layer of microcontroller card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 11

                    INTRODUCTION

                    OF SOFTWARE

                    Keil (microVision 2)

                    Eagle (Easily Applicable Graphical Layout Editor)

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    111 Keil (microVision 2)

                    1111 Introduction to C51 Cross Compiler

                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                    generates object code that matches the efficiency and speed of assembly programming

                    Using a high-level language like C has many advantages over assembly language

                    programming

                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                    the memory structure of the 8051 CPU is desirable (but not necessary)

                    Details like register allocation and addressing of the various memory types and data

                    types is managed by the compiler

                    Programs get a formal structure (which is imposed by the C programming language) and

                    can be divided into separate functions This contributes to source code reusability as

                    well as better overall application structure

                    The ability to combine variable selection with specific operations improves program

                    readability

                    Keywords and operational functions that more nearly resemble the human thought

                    process may be used

                    Programming and program test time is drastically reduced

                    The C run-time library contains many standard routines such as formatted output

                    numeric conversions and floating-point arithmetic

                    Existing program parts can be more easily included into new programs because of

                    modular program construction techniques

                    The language C is a very portable language (based on the ANSI standard) that enjoys

                    wide popular support and is easily obtained for most systems Existing program

                    investments can be quickly adapted to other processors as needed

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1112 Software Development Cycle in Keil

                    When we use the Keil Software tools the

                    project development cycle is roughly the same as

                    it is for any other software development project

                    1 Create a project select the target chip from the

                    device database and configure the tool settings

                    2 Create source files in C or assembly

                    3 Build your application with the project

                    manager

                    4 Correct errors in source files

                    5 Test the linked application A block diagram of

                    the complete 8051 tool set may best illustrate the

                    development cycle

                    112 Eagle (Easily Applicable Graphical Layout Editor)

                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                    1121 Schematic Editor

                    In this one can develop amp design circuits for the required PCB

                    1122 Layout Editor

                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                    Fig 111 Software development in KEIL

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1123 Library Editor

                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                    1124 Auto Router

                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                    the PCB tracks designed

                    1125 Cam Processor

                    This is used to finally print the various layers of the designed PCB viz Top Layer

                    Bottom Layer Component Layer Masking Layer etc

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                    Start

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 12

                    INTRODUCTION

                    OF

                    PROGRAMMING

                    Flowchart of programming

                    Program code

                    121 Flowchart

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                    2

                    flag9==1

                    flag9=1

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                    flag11==1

                    flag11=1 flag11=0 flag4=0

                    REady_LED4=0

                    Sw2_op (P01) ==0

                    My delay (10)

                    3 3

                    flag2=1 disp2=1 k2=0

                    3

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                    4

                    flag11==1

                    flag11=0 flag4=0 REady_LED4=0

                    flag11=1

                    My delay (10)

                    flag3=1 disp3=1 k3=0

                    k1==0||k2==0||k4==0

                    Sw3_op (P02) ==0

                    5

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                    flag5==1

                    5

                    flag11==1

                    flag7=1

                    flag7==1

                    flag7=0 flag2=0 REady_LED2=0

                    6

                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                    flag11=0 flag4=0 REady_LED4=0

                    flag11=1

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                    6

                    My delay (10)

                    flag4=1 disp4=1 k4=0

                    k1==0||k2==0||k3==0 flag5==1

                    7

                    Sw4_op (P03) ==0

                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                    7

                    flag7==1

                    flag9==1

                    flag7=1

                    flag7=0 flag2=0 REady_LED2=0

                    flag9=0 flag3=0 REady_LED3=0

                    flag9=1

                    Sw5_op A(P04) ==0

                    My delay (10)

                    8

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                    9

                    flag2==1

                    flag3==1

                    8

                    flag1==1

                    flag4==1 flag5=1 disp5=1

                    flag9=1 disp5=1

                    flag7=1 disp5=1

                    flag11=1 disp5=1

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                    Sw6_op (P05) ==0

                    My delay (10)

                    flag2==1 ampamp flag7==1

                    flag3==1 ampamp flag9==1 9

                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                    flag8=1 disp6=1

                    10

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                    10

                    flag4==1 ampamp flag11==1

                    flag10=1 disp6=1

                    flag12=1 disp6=1

                    flag8==1

                    flag10==1

                    11

                    flag6==1

                    i++

                    l++

                    j++

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                    flag12==1

                    M++

                    11

                    Stop

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    122 Program

                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                    define buzzerP2_0 buzzer indication

                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                    sbit sw5_op=P0^4 input switch5 for coin

                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                    output Led for indication

                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                    function prototype declaration

                    void my_delay(unsigned int value) DELAY FUCTION

                    void init_timer() timer 0 initialization function

                    variable declaration

                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    start of main programme

                    void main()

                    init_timer() call it timer initialization function

                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                    start of while loop

                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                    condition for switch1

                    if(flag1==1) check swich1 pressed if(disp1==1 )

                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                    if(iltk) loop will repeat for desired time of charging

                    if(igt=1000)

                    buzzer=1 turn on buzzer if (ii==20)

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    REady_LED1=1 turn on ready indication of led1

                    else if(ii==40)

                    REady_LED1=0ii=0

                    elseREady_LED1=0

                    START_LED1=1

                    else

                    START_LED1=0

                    k1=1 buzzer=0

                    REady_LED1=0 flag1=0

                    flag5=0flag6=0

                    condition for switch2

                    if(flag2==1) check swich2 pressed if(disp2==1)

                    REady_LED2=1 turn on ready 2 led indication

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    disp2=0

                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                    if(jltk)

                    if(jgt1000) buzzer=1 if(jj==20)

                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                    elseREady_LED2=0

                    START_LED2=1

                    else START_LED2=0

                    REady_LED2=0 k2=1 buzzer=0

                    flag2=0flag7=0flag8=0

                    j=0jj=0

                    condition for switch 3

                    if(flag3==1) check swich3 pressed

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    if(disp3==1 )

                    REady_LED3=1 disp3=0

                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                    if(lltk)

                    if(lgt1000) buzzer=1 if(ll==20)

                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                    elseREady_LED3=0

                    START_LED3=1

                    else START_LED3=0

                    LED2=0 k3=1 buzzer=0

                    REady_LED3=0 flag3=0

                    flag9=0flag10=0

                    l=0ll=0

                    condition for switch 4

                    if(flag4==1) check swich4 pressed if(disp4==1 )

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    REady_LED4=1 disp4=0

                    if(flag11==1) check coin is pressed

                    if(flag12==1) START is pressed

                    if(mltk)

                    if(mgt1000)

                    buzzer=1 if(mm==20)

                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                    elseREady_LED4=0

                    START_LED4=1

                    else START_LED4=0

                    buzzer=0 k4=1

                    REady_LED4=0 flag4=0

                    flag11=0flag12=0

                    m=0mm=0

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    while(1)

                    end of main programme

                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                    whenever specific time the interrupt will generate control will go in following function

                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if(sw1_op==0 ) ready switch flag for system1

                    my_delay(10) CALL DELAY FUNCTION

                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                    if(flag7==1) SET THE FLAG

                    flag7=1

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                    flag9=1

                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                    flag11=1

                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if(sw2_op==0 ) fready switch flag for system2

                    my_delay (10)

                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                    if(flag5==1)

                    flag5=1

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                    flag9=1

                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                    flag11=1

                    elseflag11=0flag4=0REady_LED4=0

                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                    if(flag7==1)

                    flag7=1

                    else

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                    flag5=1

                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                    flag11=1

                    elseflag11=0flag4=0REady_LED4=0

                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                    if(flag7==1)

                    flag7=1

                    elseflag7=0

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    flag2=0REady_LED2=0 if(flag5==1)

                    flag5=1

                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                    flag9=1

                    elseflag9=0flag3=0REady_LED3=0

                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                    if(flag6==1)

                    i++ if (igt1000) ii++

                    if (flag8==1)

                    j++ if(jgt1000) jj++

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    if (flag10==1)

                    l++ if (lgt1000) ll++

                    if (flag12==1)

                    m++ if (mgt1000) mm++

                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 13

                    TROUBLE SHOOT

                    Troubleshoot

                    131 TROUBLE SHOOT

                    A newly assembled circuit does not work may be due to -

                    Faulty components

                    Improper soldering

                    Wrong connections

                    Also any stop in working after some period may be due to -

                    Component failure

                    Supply failure

                    Damaging of PCB

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Fault finding is very essential if you want the circuit to operate properly

                    If a newly assembled circuit is not working properly check all the components and

                    circuit connections according to the diagram The circuit may not be working due to wrong

                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                    proper soldering

                    If faults are not observed during physical observations one should proceed for Hot

                    test ie Voltage measurement at different points for example at Input terminal etc

                    Resistance measurement is also done which is known as Dry test

                    During this project work some green LEDs was not glow then we checked it

                    continuity and replace it

                    Also relay was not properly worked therefore we replaced it Some ICs was get

                    heated after starting the project It happens because of some soldering points are shorted

                    during soldering PCB We solved that problem

                    CHAPTER 14

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    ADVANTAGES OF

                    THE PROJECT

                    Advantages

                    141 ADVANTAGES OF THE PROJECT

                    Simple and hand efficient Microcontroller based system

                    Fast charging capacity

                    Simple to operate

                    Ease of mobility

                    Facilitates connectivity for 90 of cellular phones

                    Less expensive

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Reduced man power

                    Low power consumption

                    It can offer emergency charging for 4sets of handsets synchronously

                    CHAPTER 15

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    DISADVANTAGES

                    OF THE PROJECT

                    Disadvantages

                    151 DISADVANTAGES OF THE PROJECT

                    It requires mains supply to work project

                    Due to limited charging channels till now there may be a possibility that

                    mobile phones of few brands cannot be connected for charging For this

                    purpose we have to use separate connectors for that specific brand differently

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                    min

                    It does not have battery backup therefore it cannot be portable

                    CHAPTER 16

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    APPLICATIONS OF

                    THE PROJECT

                    Application

                    161 APPLICATIONS OF THE PROJECT

                    The coin based mobile phone charger is very useful to public for using coin to

                    charge for the mobile phone in any places

                    It is used for emergency charging purposes

                    It can be installed in malls railway stations bus stops and other public

                    places

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    The charger offers a unique revenue opportunity for a vast range of

                    businesses - from airports to pubs from universities to health clubs virtually

                    any location where there is a high footfall creating a large number of

                    potential users

                    It can be installed in offices and collages for pay charging facility

                    CHAPTER 17

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    FUTURE

                    DEVELOPMENT OF

                    THE PROJECT

                    FUTURE DEVELOPMENT OF THE PROJECT

                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                    This project is very useful to people who are using mobile phone without charging

                    condition in public places

                    It will use with a stereo advertisement carrier that can display video advertisement

                    It will provide battery backup for make it portable

                    It will also provide SMS system in future

                    We can also increase the charging time by editing software of the project

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 18

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    COST ANALYSIS

                    OF THE PROJECT

                    COST ANALYSIS OF THE PROJECT

                    181 COST ANALYSIS OF THE PROJECT

                    1811 Component list for power supply card

                    Footprint Quantity Designators Rate

                    Resistor

                    22K 1 R2 1

                    1K 1 R1 1

                    Capacitor

                    1000uf25V 1 C5 10

                    2200uf25V 1 C1 10

                    022uf 2 C6 C2 1

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                    Table 1811 Component list for power supply card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    01uf 2 C4 C3 1

                    IC

                    BRIDGE W10 2 BR2 BR1 10

                    L7812CV (TO-220) 1 U2 8

                    L7805CV (TO-220) 1 U1 8

                    Connector

                    CON PHO 2PIN 2 J3 J2 16

                    CON PHO 3PIN 1 J1 12

                    LED3mm red 2 L1 L2 15

                    Heat sink (TO-220) 2 16

                    Total 955

                    1812 Component list for battery charger card

                    Footprint Quantity Rate

                    Capacitor

                    2200uf25V 1 1000

                    022uf 4 100

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    01uf 4 100

                    IC

                    BRIDGE W10 1 500

                    L7805CV (TO-220) 4 3200

                    Connector

                    CON PHO 2PIN 1 800

                    Relimate 2 pin 1 400

                    relimate 3 pin 4 2000

                    Heat sink (TO-220) 4 1200

                    TOTAL 9300

                    1813 Component list for Relay card

                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                    Table 1812Component list for battery charger card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                    Total 18900

                    1814Component list for controller card

                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                    Table 1813Component list for relay card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                    total 27000

                    1815 Miscellaneous material

                    Material Quantity Rate

                    electronic item

                    Transformer

                    TXR1 0-9-15 1 20000

                    0-9 1A

                    0-15 100mA

                    TXR2 0-9 1 16500

                    0-9 1A

                    Proximity switch 1 20000

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                    Table 1814Component list for microcontroller card

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Red push bottom 4 4000

                    Green push button 1 1000

                    Red led 5mm 4 800

                    Green led 5mm 4 800

                    Led holder 8 1600

                    Copper clad 2 4000

                    3 core cable 1 meter 1500

                    3 pin plug 1 3000

                    2 pin relimate wire 19 9000

                    3 pin relimate wire 5 3750

                    4 pin relimate wire 2 2000

                    mechanical items

                    Enclosure 1 25000

                    Acrylic sheet 2 X 1 30000

                    12mm cable gland 1 1000

                    Screw 3mm 33 2000

                    Screw 35mm 6 2400

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    10 mm spacers 100 1500

                    10mm insert to stud 50 10000

                    cable tie 2500

                    Total 162350

                    CHAPTER 19

                    APPENDIX

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                    Table 1815Component list for miscellaneous material

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    APPENDIX

                    191 APPENDIX

                    1911 78xx IC datasheet

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1912 W10 datasheet

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1913 4n33 IC datasheet

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                    1914 MAX 232

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1915 ULN2003a IC datasheet

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    1916 89V51RD2 IC datasheet

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 20

                    CONCLUSION

                    CONCLUSION

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    201 CONCLUSION

                    The coin-operated mobile phone charger is already successfully installed in

                    hundreds of locations worldwide providing a unique service to the public and a source of

                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                    installed in any business premises

                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                    from airports to pubs from universities to health clubs virtually any location where there is

                    a high footfall creating a large number of potential users

                    The charger can charge up to 4 different mobile phones simultaneously It will

                    extend low mobile phone talk time provide battery charging

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 21

                    IMAGES OF THE

                    PROJECT

                    Images of the project

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    211 IMAGES OF THE PROJECT

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                    fig211 lsquoCoin operated mobile battery charger

                    Fig212 Circuit arrangement of coin operated mobile battery charger

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Fig 216 Relay driver circuit

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                    Fig 213 Constant voltage battery charger circuit

                    Fig214 Power supply circuit

                    Fig215 Metal detector proximity switch

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Fig217 Microcontroller circuit

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    Fig228 coin operated mobile battery charger project presentation

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    CHAPTER 22

                    BIBILOGRAPHY

                    BIBLIOGRAPHY

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                    221 BIBLIOGRAPHY

                    BOOKS

                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                    INTERNET LINKS

                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                    • CHAPTER 1

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      42 Brief Explanation

                      421 POWER SUPPLY

                      Power supply is used to deliver power to the circuit It delivers +5Vdc to

                      microcontroller and other peripherals and +12Vdc delivers power to relay

                      422 COIN INPUT AND LEVEL CONVERTOR

                      Coin input is a sensor which senses a metal and produces an output voltage This

                      voltage is high as compared to the input required for microcontroller

                      Hence a level shifter is used to bring down the voltage level which could be

                      readable to microcontroller

                      423 START SWITCH

                      Start switch is used to start the charging process of a

                      mobile phone

                      424 RS232 INTERFACING TO PC

                      RS 232 is a protocol used for communication between

                      computer and microcontroller It is also used for

                      programming the microcontroller in its ISP (in system

                      programming) mode

                      425 CHANNEL READY INDICATOR

                      It provides visual indication for the channel which is in

                      charging mode

                      426 DARLINGTON PAIR ARRAY

                      Darlington pair array is used as a relay driver

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 11

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      427 CHANNEL IN CHARGE INDICATION

                      It provides visual indication for the channel which is in

                      charging mode

                      428 RELAY ARRAY

                      Relay array consists of relays for each channel to

                      provide electromechanical switching in between charger and

                      mobile phone

                      429 CHARGER ARRAY

                      Charger array is used to provide charging power to the

                      mobile phones through the electromechanical switches

                      4210 CELL PHONE TO CHARGE

                      Channel select switch is used for selecting a channel on

                      which the mobile phone is to be charged

                      4211 MICROCONTROLLER

                      Microcontroller is used to control the whole operation of

                      the device Microcontroller reads input signal from input

                      device and triggers the output device According to the

                      conditions defined in the microcontroller by the programmer

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 5

                      CIRCUIT

                      DIAGRAM

                      EXPLANATION

                      Circuit diagram

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Circuit diagram explanation Working

                      51 POWER SUPPLY CIRCUIT

                      511 CIRCUIT DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                      Fig51 Circuit diagram of the power supply

                      Bridge RectifierTRANSFORMER

                      Filter Voltage regulator Load

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      512 WORKING

                      Transformer

                      A step-down transformer is used to achieve our requirements of the power

                      supply It steps down high voltage ac mains to low voltage ac mains

                      Bridge Rectifier

                      A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                      full wave rectification This is a widely used configuration both with individual

                      diodes wired and with single component bridges where the diode bridge is wired

                      internally It also converts ac to dc but the dc output is varying

                      One advantage of a bridge rectifier over a conventional full-wave rectifier is

                      that with a given transformer the bridge rectifier produces a voltage output that is

                      nearly twice that of the conventional full-wave circuit

                      Filter

                      The output of the rectifier is a pulsating dc wave We need a constant dc

                      output To do this we need to filter out the oscillation from the pulsating dc wave

                      This is obtained with a diode capacitor combination

                      Voltage Regulator

                      A voltage regulator is used for voltage regulation in the circuit This provides

                      a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                      dc output to fixed voltages

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                      Fig 52 Block diagram of the power supply

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Load

                      The load can be anything which wants to switch ON by using power supply

                      513 CIRCUIT DIAGRAM EXPLANATION

                      Regulated power supplies are commonly used in engineering projects Power

                      supply is food of any circuit

                      +5V SUPPLY UNIT

                      +5V supply is obtained from the +5V supply unit for microcontroller and

                      digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                      transformer having a capacity of 500mA

                      Since the input voltage to the regulator IC should be more than its output

                      voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                      of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                      smooth DC supply The rating of the chosen capacitor filter is 1000microF

                      The regulated DC voltage is obtained by using a regulator IC 7805 In the

                      case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                      Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                      output of regulator IC to eliminate the voltage oscillations at the output due to the large

                      voltage oscillations at the input of the regulator

                      +12V SUPPLY UNIT

                      The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                      arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                      step down transformer having a capacity of 1A and the center tap of the transformer is

                      grounded This low voltage is rectified with the help off bridge rectifier

                      Since the input voltage to the regulator IC should be more than its output

                      voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                      the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                      filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                      For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                      7912 is used

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                      the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                      connected at the output as shown in figure to eliminate the voltage oscillations at the

                      output due to the large voltage oscillations at the input of the regulator

                      52 CONSTANT VOLTAGE CHARGER

                      521 CIRCUIT DIAGRAM

                      Fig 53 Circuit diagram of the battery charger

                      522 CIRCUIT DIAGRAM EXPLANATION

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Constant-voltage (often called constant-potential) chargers maintain nearly the same

                      voltage input to the battery throughout the charging process regardless of the batterys state

                      of charge Constant-voltage chargers provide a high initial current to the battery because of

                      the greater potential difference between the battery and charger

                      A constant-voltage charger may return as much as 70 of the previous discharge in

                      the first 30 minutes This proves useful in many battery applications involving multiple

                      discharge scenarios As the battery charges its voltage increases quickly This reduces the

                      potential that has been driving the current with a corresponding rapid decrease in charge

                      current as depicted in the illustration below As a result even though the battery reaches

                      partial charge quickly obtaining a full charge requires prolonged charging

                      Given this behavior constant-voltage chargers are frequently found in applications

                      that normally allow extended charging periods to attain full charge Constant-voltage

                      chargers should not be used where there is frequent cycling of the battery Repeated

                      discharges without returning the cell to its full charge will eventually decrease the battery

                      capacity and may damage individual cells

                      Fig 54An Illustration graph of the charging function of constant battery charger

                      Constant-voltage chargers are most often used in two very different modes as a fast

                      charger to restore a high percentage of charge in a short time or as a float charger to

                      minimize the effects of overcharge on batteries having infrequent discharges

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      53 RELAY DRIVER CIRCUIT

                      531 CIRCUIT DIAGRAM

                      532 CIRCUIT DIAGRAM EXPLANATION

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                      Fig 55 Relay driver circuit

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Input from the controller is connected to the relay card through connector J1 which

                      carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                      pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                      These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                      relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                      series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                      and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                      relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                      NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                      3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                      RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                      is used to connect power supply to relay card

                      533 WORKING

                      While taking Relay1 (RL1) into consideration we will discuss the working of relay

                      card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                      of the IC are in cut off region which causes an open circuit so there is no current flow

                      flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                      applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                      completes the path ie provide ground to the relay coil so the current flows through the

                      LED activating the relay

                      As the current flows through the relay coil it gets energized and switch over the

                      contacts ie common and normally open contact get connected and provide a path to flow

                      current from J11 ie charger into the load connected at J4 hence the cell phone charging

                      process starts The same above process is applies for all relays If LED is fused or

                      damaged the path will be open and relay will not be energized and if relay is damaged the

                      led will not be illuminated So the LED here is used as a FAULT indicator and a

                      CHARGING ON indicator

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      54 MICROCONTORLLER CIRCUIT

                      541 CIRCUIT DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      542 CIRCUIT DIAGRAM EXPLANATION

                      CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                      the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                      port P04 through J4 and START switch is connected to port P05 through SW5

                      Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                      P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                      Output for relay card is taken on port P14 to P17

                      Components C1 R1 and push button S1 forms reset circuit which provides a power

                      on reset for the micro controller and even provide manual reset Crystal XL1 is a

                      110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                      22pf capacitor used as loading capacitor for crystal

                      Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                      RN2 resistance network

                      IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                      the proximity switch and microcontroller and convert its output readable to microcontroller

                      IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                      communication between PC and a microcontroller through connector J3

                      Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                      communication process

                      Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                      power supply connection

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      543 PORT ASSIGNMENTS FOR 89V51RD2FN

                      P00 = switch1 for channel 1

                      P01 = switch2 for channel 2

                      P02 = switch3 for channel 3

                      P03 = switch4 for channel 4

                      P04 = switch5 for coin input sensor (proximity switch)

                      P05 = switch6 for start charging

                      P10 = channel 1 red LED1 (ready system)

                      P11 = channel 2 red LED2 (ready system2)

                      P12 = channel 3 red LED3 (ready system3)

                      P13 = channel 4 red LED4 (ready system4)

                      P14 = channel 1 relay (start system1)

                      P15 = channel 2 relay (start system2)

                      P16 = channel 3 relay (start system3)

                      P17 = channel 4 relay (start system4)

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 6

                      LIST OF THE

                      COMPONENTS

                      List of the components

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      61 LIST OF THE COMPONETS

                      RESISTORS

                      CAPACITORS

                      LIGHT EMITING DIODES (LEDS)- Green Red

                      RELAYrsquoS-

                      TRANSFORMERS

                      RECTIFIER BRIDGES (W 10)

                      OSCILLATOR

                      SWITCHES- Push switches

                      DARLINGTON PAIR IC (ULN2003a)

                      SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                      SERIAL COMMUNICATION DRIVER IC (MAX 232)

                      OPTOCOUPLER IC (4N33)

                      MICROCONTROLLER IC (89V51 RD2)

                      RELIMATE CONNECTOR- 2 pin amp 4 pin

                      RS-232 PORT CONNECTOR

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 7

                      INTRODUCTION

                      OF COMPONENTS

                      Working of components

                      Features or Uses of components

                      Testing of components

                      71 RESISTOR

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      711 WORKING

                      Resistors limit current Resistors are considered to be the most used and the most

                      important component of all the electronic circuits Resistors resist the flow of electrical

                      current The higher the value of resistance (measured in ohms)

                      the lower the current will be

                      712 TESTING

                      Read the indicated color code value then select the OHM-scale within but not way

                      below the indicated value A resistor is good if its resistance is close to the indicated

                      Tolerance should be considered with the ohmmeter reading While no resistance reading at

                      all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                      ohmmeter scale settings resistor is shorted

                      713 SPECIFICATIONS

                      To completely specify a resistors characteristics requires knowledge of the following

                      parameters-

                      bull Value

                      bull Tolerance

                      bull Temperature Coefficient

                      bull Power Rating

                      The specification of a resistor may be marked on its surface using either of two

                      systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                      the second more recent system uses a combination of alpha-numeric characters

                      7 2 CAPACITOR

                      721 WORKING

                      When DC voltage is applied to the capacitor an electric charge is stored on each

                      electrode While the capacitor is charging up current flows The current will stop flowing

                      when the capacitor has fully charged Capacitors find use

                      in circuits for a variety of purposes They are used in

                      time delay generation RC circuits In power supplies for filtering and power supply

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      decoupling as blocking capacitors for power factor correction and motor starting in LC

                      tank circuits and so on

                      722 TESTING

                      To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                      negative probe to the capacitor positive terminal the positive probe to the negative terminal

                      A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                      and moves back again to infinite resistance position A defective indication for an

                      electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                      which is an indication that the capacitor is shorted

                      73 LIGHT EMITING DIODE (LED)

                      731 WORKING

                      LEDs are special diodes that emit light when

                      connected in a circuit They are frequently used as pilot lights in electronic appliances to

                      indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                      the heart of an LED the semi-conductor chip

                      In our project Green LED are used here for mainly two purpose

                      a Charging ON indication (when ON)

                      b Channel fault indication (always OFF)

                      732 TESTING

                      The good and working LED will then light up or glow a busted LED will not LEDs

                      must have a resistor in series to limit the current to a safe value for quick testing purposes a

                      1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                      directly connected to a battery or power supply It will be destroyed the LED

                      733 FEATURES

                      Single color

                      High bright output

                      Low power consumption

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      High reliability and long life

                      734 Descriptions

                      Dice material GaInN

                      Emitting Color Super Bright White

                      Device Outlineφ5mm Round Type

                      Lens Type Water Clear

                      74 RELAY

                      741 WORKING

                      A relay is an electrically operated switch Current

                      flowing through the coil of the relay creates a magnetic field

                      which attracts a lever and changes the switch contacts The coil

                      current can be on or off so relays have two switch positions and

                      most have double throw (changeover) switch contacts

                      Relays are like remote control switches and are used in

                      many applications because of their relative simplicity long life

                      and proven high reliability

                      742 USES

                      The main operation of a relay comes in places where only a low-power signal can be

                      used to control a circuit

                      It is also used in places where only one signal can be used to control a lot of circuits

                      The application of relays started during the invention of telephones They played an

                      important role in switching calls in telephone exchanges They were also used in

                      long distance telegraphy They were used to switch the signal coming from one

                      source to another destination

                      743 TESTING

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      A relay will usually have a coil pole terminal and a set of

                      contacts The set of contacts that are open when the relay is not

                      energized are called normally open (NO) contacts and the set of

                      contacts that are closed when the relay is not energized are called

                      normally closed (NC) contacts The following steps can be used to perform the testing of

                      the relay using a multimeter

                      Keep the multimeter in the continuity check mode

                      Check for continuity between the NC contacts and pole

                      Check for discontinuity between NO contacts and the pole

                      Now energies the relay using the rated voltage For example use a 9V battery for

                      energizing a 9V relay The relay will engage with clicking sound

                      Now check for continuity between NO contacts and pole

                      Also check for discontinuity between NC contacts and pole

                      As a final test measure the resistance of the relay coil using a multimeter and check

                      whether it is matching to the value stated by the manufacturer

                      If all the above tests are positive we can conclude that the relay is healthy

                      75 TRANSFORMER

                      751 WORKING

                      A transformer is a device that transfers electrical energy

                      from one circuit to another through inductively coupled

                      electrical conductors A changing current in the first circuit (the

                      primary) creates a changing magnetic field

                      This changing magnetic field induces a changing voltage in the second circuit (the

                      secondary) This effect is called mutual induction

                      If a load is connected to the secondary circuit electric charge will flow in the

                      secondary winding of the transformer and transfer energy from the primary circuit to the

                      load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                      of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                      number of primary turns

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      By appropriate selection of the numbers of turns a transformer thus allows an

                      alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                      making it less

                      752 TESTING

                      1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                      scale and then adjusting the knob to verify its reading is an easy step to the

                      reading of the ohm

                      2 To check the resistance of the coil unplug or unsolder the leads of the

                      transformer from its circuit and measure the resistance of each coil

                      3 The next step is to test each coil for shorts to other coils

                      76 RECTIFIER BRIDGE (W 10)

                      761 WORKING

                      A diode bridge rectifier is a device for converting AC or

                      alternating current electricity into DC or direct current AC

                      electricity goes from positive to negative constantly whereas DC

                      always flows in the same direction

                      AC electricity is more efficient to transmit and easier to

                      convert into different voltages However most appliances need DC current to run A diode

                      bridge rectifier is the most common type of power supply used to provide this current In

                      our project W10 is a bridge rectifier which provides on single semiconductor chip

                      77 OSCILLATOR

                      771 Working

                      An oscillator puts out an endless series of pulses The output

                      constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      all digital circuits have some type of oscillator This stream of output pulses is often

                      called a clock One of the most important features of any oscillator is its frequency stability

                      or in other words its ability to provide a constant frequency output under varying load

                      conditions Some of the factors that affect the frequency stability of an oscillator include

                      temperature variations in the load and changes in the DC power supply Frequency stability

                      of the output signal can be improved by the proper selection of the components used for the

                      resonant feedback circuit including the amplifier but there is a limit to the stability that can

                      be obtained from normal LC and RC tank circuits

                      In our project instead of 12MHz crystal 110592MHz is used because it can be

                      divided to give you exact clock rates for most of the common baud rates for the UART

                      especially for the higher speeds (9600 19200) These crystals are readily available and

                      commonly used

                      78 SWITCH

                      781 WORKING

                      The most familiar form of switch is a manually operated

                      electromechanical device with one or more sets of electrical contacts

                      Each set of contacts can be in one of two states either closed meaning

                      the contacts are touching and electricity can flow between them or

                      open meaning the contacts are separated and the switch is non

                      conducting The mechanism actuating the transition between these two

                      states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                      momentary (push-for on or push-for off) type

                      782 USES

                      In electronics a switch is an electrical component that can break an electrical

                      circuit interrupting the current or diverting it from one conductor to another

                      783 TESTING

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      When the switch is ON it looks and acts like a wire When the switch is OFF there is

                      no connection Switch can tested by using multimeter in continuity range

                      79 DARLINGTON PAIR IC (ULN2003a)

                      791 WORKING

                      The Darlington transistor (often called a Darlington pair) is a

                      compound structure consisting of two bipolar transistors (either

                      integrated or separated devices) connected in such a way that the

                      current amplified by the first transistor is amplified further by the

                      second one This configuration gives a much higher current gain than

                      each transistor taken separately and in the case of integrated devices

                      can take less space than two individual transistors because they can

                      use a shared collector

                      Integrated Darlington pairs come packaged singly in

                      transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                      The Darlington transistor array used is ULN2003 Applications include relay

                      drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                      drivers and logic buffers Each input of this device has a zener diode and resistor in series

                      to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                      for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                      792 FEATURES

                      The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                      transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                      with common-cathode clamp diodes for switching inductive loads The collector-current

                      rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                      higher current capability

                      710 SERIES VOLTAGE REGULATER IC (78XX)

                      7101 WORKING

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Voltage Regulator (regulator) usually having three legs converts varying input

                      voltage and produces a constant regulated output voltage They are available in a variety of

                      outputs

                      The most common part numbers start with the numbers 78 or 79 and finish with two

                      digits indicating the output voltage The number 78 represents positive voltage and 79

                      negative one The 78XX series of voltage regulators are designed for positive input

                      The LM78XX series typically has the ability to drive current up to 1A For

                      application requirements up to 150mA 78LXX can be used As mentioned above the

                      component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                      an output leg with the regulators voltage

                      As a general rule the input voltage should be limited to 2 to 3 volts above the output

                      voltage The LM78XX series can handle up to 36 volts input be advised that the power

                      difference between the input and output appears as heat If the input voltage is unnecessarily

                      high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                      sinking the regulator will shut down

                      711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                      7111 WORKING

                      The MAX-232 It includes a Charge Pump which generates

                      +10V and -10V from a single 5v supply

                      This IC also includes two receivers and two transmitters in

                      the same package This is handy in many cases when we only want to

                      use the Transmit and Receive data Lines We dont need to use two chips one for the

                      receive line and one for the transmit There are also many variations of these devices The

                      large value of capacitors are not only bulky but also expensive Therefore other devices are

                      available which use smaller capacitors and even some with inbuilt capacitors However the

                      MAX-232 is the most common and thus we will use this RS-232 Level Converter

                      Dual Charge-Pump Voltage Converter

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                      V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                      output

                      712 OPTOCOUPLER IC (4N33)

                      7121 WORKING

                      In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                      photoMOS) is a device that uses a short optical transmission path to transfer a signal

                      between elements of a circuit typically a transmitter and a receiver while keeping them

                      electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                      back to an electrical signal electrical contact along the path is broken

                      Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                      essentially a combination of two distinct devices an optical transmitter typically a gallium

                      arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                      light-triggered diac The two are separated by a transparent barrier which blocks any

                      electrical current flow between the two but does allow the passage of light

                      The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                      silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                      of isolation between driving and load circuits These Optocouplers can be used to replace

                      reed and mercury relays with advantages of long life high speed switching and elimination

                      of magnetic field

                      713 MICROCONTROLLER IC (89V51 RD 2 )

                      713 WORKING

                      The P89V51RD2 is an 80C51 microcontroller with 64

                      kB Flash and 1024 bytes of data RAM

                      A key feature of the P89V51RD2 is its X2 mode option

                      The design engineer can choose to run the application with the conventional 80C51 clock

                      rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      achieve twice the throughput at the same clock frequency Another way to benefit from this

                      feature is to keep the same performance by reducing the clock frequency by half thus

                      dramatically reducing the EMI

                      The Flash program memory supports both parallel programming and in serial In-

                      System Programming (ISP) Parallel programming mode offers gang-programming at high

                      speed reducing programming costs and time to market ISP allows a device to be

                      reprogrammed in the end product under software control The capability to fieldupdate the

                      application firmware makes a wide range of applications possible The P89V51RD2 is also

                      In-Application Programmable (IAP) allowing the Flash program memory to be

                      reconfigured even while the application is running

                      714 RELIMATE CONNECTOR

                      7141 WORKING

                      These are wire to board type connectors used to facilitate

                      proper and firm electrical connection between the relay card and

                      microcontroller card

                      The connector has following specifications

                      No of Ways 2-20

                      Voltage Rating 250V AC DC

                      Current Rating 3A AC DC

                      Contact Resistance 20mW max

                      Insulation Resistance 1000MW min

                      Dielectric Withstanding 1000V ACminute

                      Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                      The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                      connector is it provides a fast and easy connection and disconnection it also avoids polarity

                      conflicts

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      715 RS-232 PORT CONNECTOR

                      7151 WORKING

                      Almost all digital devices which we use require either TTL

                      or CMOS logic levels Therefore the first step to connecting a

                      device to the RS-232 port is to transform the RS-232 levels back

                      into 0 and 5 Volts This is done by RS-232 Level Converters

                      Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                      Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                      The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                      problem in many instances where only a single supply of +5V is present

                      CHAPTER 8

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      IMPLIMENTATION

                      OF THE PCB

                      Components layout designing

                      Developing or Etching the PCB

                      Other operations like Drilling Cutting Tinning

                      81 IMPLIMENTATION OF THE PCB

                      A proper PCB ensure that various circuit components are interconnected as per the

                      circuit diagram once they have been placed on the PCB in their proper positions and

                      subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                      base material to which is permanently attached a flat metallic network of conducting path

                      whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                      for this project is single one

                      The basic material used may be resin coated paper fiber glass ceramic and the flat

                      board configuration however is most widely used and it may be of the nature of the single

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                      which ensures adequate and permanent low resistance coupling

                      811 BOARD DESIGN

                      PCB designed is the most important and requires great care during work In this case

                      great care must be taken while tracing the circuit or layout on the board Because once PCB

                      is designed it is virtually impossible to alter it While designing a circuit designer should

                      take care to avoid crossing of conducting path (tracks) as possible Crossover are

                      unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                      also help to solve this problem when circuit is complicated

                      812 THE MASTER DIAGRAM

                      The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                      which is commonly made twice as the finished circuit since this makes the working on that

                      much easier especially when circuit is complicated photography eventually reduces the

                      size of diagram to that of the circuit before proceeding we must know some rules regarding

                      the designing -

                      a The space between the conductors must be strictly controlled to avoid the possibility

                      of electrical discharges or unwanted capacitance The amount by which the mater

                      diagram is to reduce in size is thus a critical deign feature

                      b The conductor must be wider in those part of the circuits that are going to handle

                      large current must be handle without undue temperature of conductors

                      c The minimum width of copper should not generally be less than about 15mmThis

                      is related to mechanical strength rather than electrical properties and it also ensure

                      that strips remains securely bounded to the base material

                      d The points where the component holes for component lead wire occurs must be sited

                      to suit the dimensions of the component and dimensions between lead-out wire so

                      that the components can be situated correctly on finished board The conductor is

                      also main large at the point of holes

                      813 PCB MAKING

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      When the mater diagram probable twice the size of real PCB has been evolved the

                      test major step consists of etching or dissolving the unwanted metal from copper claded

                      board to create a circuit as depicted by master diagram It must be stressed that very

                      accurate checking master is essential at this stage Then the master point is mounted on a

                      special frame on easy facing of a larger camera and with the aid of the very powerful

                      illumination a master diagram is clearly photographed on a glass sensitive plate This is

                      developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                      brought into operation This comprises the camera body mounted so that sideways after

                      each exposure In this way number of copies of the original master diagram is set out

                      exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                      In case of simple and need of number of less PCB economic and advisable to use the

                      following lab method of PCB making

                      Planning The Circuit

                      It is not a particular difficult There are several important factors that need not be

                      taken into account if the finished device is to work properly we must consider gain factor

                      and ensure that the input and output parts are sufficiently well isolated to avoid the

                      possibility We must also ensure that conductors and components carrying high frequency

                      current are well separated from the part of the circuit We are also to make sure that all

                      components need to return to earth are properly connected and that possibility of common

                      impedance arising earth returned

                      Circuit is totally eliminated by making all earth as substantial possible consistent

                      with nature of design Other factors that have to successfully studied include availability of

                      adequate return points on board and itrsquos mounting from accessibility of switch connection

                      made for mechanical fixing ventilation effect of vibration

                      Cleaning The Board

                      The copper side of the board must be thoroughly cleaned before circuit plan is

                      transferred to it This is important because even slightest trace of graze (from figure of

                      instance) will impure the etching process and when the circuit plan has been neatly

                      transferred to copper in this manner the board is held under running tap and the allowed to

                      dry before resist is applied

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Transforming the Plan

                      Now once cleaning is done plan has to transfer on copper surface of PCB material

                      A convenient way to do this is simply put the carbon paper between a copper surface of the

                      board and working plan and carefully trace the lines of original plan with a ball pen

                      Resist

                      Resist is nothing more than a substrate that is unaffected by presence etching

                      chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                      clearly worked on clean copper that are to be left in fact as the copper conductor must be

                      covered when resists the leaguer type of paints possess good resist properties but

                      disadvantage of relatively long time taken for drying It is essential to resist through

                      hardening before etching is started Nail polished are better as they quickly and are less

                      difficult to remove

                      To overcome this drying effect and to achieve the sharp edge of the trace on the

                      PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                      short circulating due to paints are completely the avoid etching tapes and pads are available

                      in different sizes

                      Correcting Error

                      When a result has been thoroughly hardened any errors that have been made can

                      usually be corrected by gently scratching away with knife To ensure clear out lines round

                      edges of copper conductors on board the resist must be applied with steady band

                      Etching

                      Next comes etching of unwanted copper amp whether a small single is all that is

                      required as quantity of board to be produce certain precautions must be taken before

                      operation is commenced the most used etch amp I ferrite chloride to this is added small

                      quantity of HCL to accelerate But not critical as lab construction concerned A good

                      etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                      grams of water

                      Agitation

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                      the etchant process The depth of liquid must be sufficient to completely cover laminate the

                      laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                      gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                      temperature and thickness of copper foil

                      Finishing Off

                      When all unwanted copper is dissolved from areas between conductor board should

                      be taken from an etchant amp washed in water The resist must be removed using proper

                      solvent After this the copper surface must be polished with any kind of cleaner It should be

                      seen that there is no slight incomplete etching between the conducting parts of the PCB The

                      PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                      This process is called Tinning This process of coating involve track with soldier

                      Advantage of tinning the effect of environment of conductors then PCB is drilled

                      ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                      Assembling On PCB

                      After the holes are drilled the component have to be assembled on PCB before

                      assembling the components it is necessary to clean soldering iron in order to get easy amp

                      accurate soldering Removing impurity particles that are gathered on iron bit due to

                      repetitive use cleans soldering iron

                      CHAPTER 9

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      SOLDERING

                      TECHNIQUE

                      Technique for good soldering

                      91 SOLDERING TECHNIQUE

                      For soldering of any joints first the terminal to be soldered are cleaned to remove

                      oxide film or dirt on it If required flux is applied on the points to be soldered

                      Now the joint to be soldered is heated with the help of soldering iron Heat

                      applied should be such that when solder wire is touched to joint it must melt

                      quickly

                      The joint and the soldering iron is held such that molten solder should flow

                      smoothly over the joint

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      When joint is completely covered with molten solder the soldering iron is re-

                      moved

                      The joint is allowed to cool without any movement

                      The bright shining solder indicates good soldering

                      In case of dry solder joint a air gap remains in between the solder material and

                      the joint It means that soldering is improper This is removed and again solder-

                      ing is done

                      Thus this way all the components are soldered on P C B

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 10

                      PCB LAYOUTS

                      Schematic diagram

                      Bottom and top layout

                      101 POWER SUPPLY CARD

                      1011 SCHIMETIC DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1012 LEGEND MARKING

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                      Fig1011 Schematic diagram of power supply card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1013TOP LAYER

                      1014 BOTTOM LAYER

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                      Fig1013 Top layer of power supply

                      card

                      Fig1014 Schematic diagram of power supply card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      102 BATTERY CHARGER CARD

                      1021 SCHEMATIC DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                      Fig1021 Schematic diagram of battery charger card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      103 RELAY CARD

                      1031 SCHIMETIC DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                      Fig1031 Schematic diagram of Relay card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1032 RELAY CARD LEGEND MARKING

                      1033 TOP LAYER

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                      Fig1032 Legend marking of Relay card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1034 BOTTOM LAYER

                      104 MICROCONTROLER CARD

                      1041 SCHIMETIC DIAGRAM

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                      Fig1034 Bottom layer of Relay card

                      Fig1041 Schematic diagram of microcontroller card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1042 ALL LAYERS

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                      Fig1042 All layer of microcontroller card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 11

                      INTRODUCTION

                      OF SOFTWARE

                      Keil (microVision 2)

                      Eagle (Easily Applicable Graphical Layout Editor)

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      111 Keil (microVision 2)

                      1111 Introduction to C51 Cross Compiler

                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                      generates object code that matches the efficiency and speed of assembly programming

                      Using a high-level language like C has many advantages over assembly language

                      programming

                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                      the memory structure of the 8051 CPU is desirable (but not necessary)

                      Details like register allocation and addressing of the various memory types and data

                      types is managed by the compiler

                      Programs get a formal structure (which is imposed by the C programming language) and

                      can be divided into separate functions This contributes to source code reusability as

                      well as better overall application structure

                      The ability to combine variable selection with specific operations improves program

                      readability

                      Keywords and operational functions that more nearly resemble the human thought

                      process may be used

                      Programming and program test time is drastically reduced

                      The C run-time library contains many standard routines such as formatted output

                      numeric conversions and floating-point arithmetic

                      Existing program parts can be more easily included into new programs because of

                      modular program construction techniques

                      The language C is a very portable language (based on the ANSI standard) that enjoys

                      wide popular support and is easily obtained for most systems Existing program

                      investments can be quickly adapted to other processors as needed

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1112 Software Development Cycle in Keil

                      When we use the Keil Software tools the

                      project development cycle is roughly the same as

                      it is for any other software development project

                      1 Create a project select the target chip from the

                      device database and configure the tool settings

                      2 Create source files in C or assembly

                      3 Build your application with the project

                      manager

                      4 Correct errors in source files

                      5 Test the linked application A block diagram of

                      the complete 8051 tool set may best illustrate the

                      development cycle

                      112 Eagle (Easily Applicable Graphical Layout Editor)

                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                      1121 Schematic Editor

                      In this one can develop amp design circuits for the required PCB

                      1122 Layout Editor

                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                      Fig 111 Software development in KEIL

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1123 Library Editor

                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                      1124 Auto Router

                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                      the PCB tracks designed

                      1125 Cam Processor

                      This is used to finally print the various layers of the designed PCB viz Top Layer

                      Bottom Layer Component Layer Masking Layer etc

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                      Start

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 12

                      INTRODUCTION

                      OF

                      PROGRAMMING

                      Flowchart of programming

                      Program code

                      121 Flowchart

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                      2

                      flag9==1

                      flag9=1

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                      flag11==1

                      flag11=1 flag11=0 flag4=0

                      REady_LED4=0

                      Sw2_op (P01) ==0

                      My delay (10)

                      3 3

                      flag2=1 disp2=1 k2=0

                      3

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                      4

                      flag11==1

                      flag11=0 flag4=0 REady_LED4=0

                      flag11=1

                      My delay (10)

                      flag3=1 disp3=1 k3=0

                      k1==0||k2==0||k4==0

                      Sw3_op (P02) ==0

                      5

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                      flag5==1

                      5

                      flag11==1

                      flag7=1

                      flag7==1

                      flag7=0 flag2=0 REady_LED2=0

                      6

                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                      flag11=0 flag4=0 REady_LED4=0

                      flag11=1

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                      6

                      My delay (10)

                      flag4=1 disp4=1 k4=0

                      k1==0||k2==0||k3==0 flag5==1

                      7

                      Sw4_op (P03) ==0

                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                      7

                      flag7==1

                      flag9==1

                      flag7=1

                      flag7=0 flag2=0 REady_LED2=0

                      flag9=0 flag3=0 REady_LED3=0

                      flag9=1

                      Sw5_op A(P04) ==0

                      My delay (10)

                      8

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                      9

                      flag2==1

                      flag3==1

                      8

                      flag1==1

                      flag4==1 flag5=1 disp5=1

                      flag9=1 disp5=1

                      flag7=1 disp5=1

                      flag11=1 disp5=1

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                      Sw6_op (P05) ==0

                      My delay (10)

                      flag2==1 ampamp flag7==1

                      flag3==1 ampamp flag9==1 9

                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                      flag8=1 disp6=1

                      10

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                      10

                      flag4==1 ampamp flag11==1

                      flag10=1 disp6=1

                      flag12=1 disp6=1

                      flag8==1

                      flag10==1

                      11

                      flag6==1

                      i++

                      l++

                      j++

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                      flag12==1

                      M++

                      11

                      Stop

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      122 Program

                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                      define buzzerP2_0 buzzer indication

                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                      sbit sw5_op=P0^4 input switch5 for coin

                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                      output Led for indication

                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                      function prototype declaration

                      void my_delay(unsigned int value) DELAY FUCTION

                      void init_timer() timer 0 initialization function

                      variable declaration

                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      start of main programme

                      void main()

                      init_timer() call it timer initialization function

                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                      start of while loop

                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                      condition for switch1

                      if(flag1==1) check swich1 pressed if(disp1==1 )

                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                      if(iltk) loop will repeat for desired time of charging

                      if(igt=1000)

                      buzzer=1 turn on buzzer if (ii==20)

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      REady_LED1=1 turn on ready indication of led1

                      else if(ii==40)

                      REady_LED1=0ii=0

                      elseREady_LED1=0

                      START_LED1=1

                      else

                      START_LED1=0

                      k1=1 buzzer=0

                      REady_LED1=0 flag1=0

                      flag5=0flag6=0

                      condition for switch2

                      if(flag2==1) check swich2 pressed if(disp2==1)

                      REady_LED2=1 turn on ready 2 led indication

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      disp2=0

                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                      if(jltk)

                      if(jgt1000) buzzer=1 if(jj==20)

                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                      elseREady_LED2=0

                      START_LED2=1

                      else START_LED2=0

                      REady_LED2=0 k2=1 buzzer=0

                      flag2=0flag7=0flag8=0

                      j=0jj=0

                      condition for switch 3

                      if(flag3==1) check swich3 pressed

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      if(disp3==1 )

                      REady_LED3=1 disp3=0

                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                      if(lltk)

                      if(lgt1000) buzzer=1 if(ll==20)

                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                      elseREady_LED3=0

                      START_LED3=1

                      else START_LED3=0

                      LED2=0 k3=1 buzzer=0

                      REady_LED3=0 flag3=0

                      flag9=0flag10=0

                      l=0ll=0

                      condition for switch 4

                      if(flag4==1) check swich4 pressed if(disp4==1 )

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      REady_LED4=1 disp4=0

                      if(flag11==1) check coin is pressed

                      if(flag12==1) START is pressed

                      if(mltk)

                      if(mgt1000)

                      buzzer=1 if(mm==20)

                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                      elseREady_LED4=0

                      START_LED4=1

                      else START_LED4=0

                      buzzer=0 k4=1

                      REady_LED4=0 flag4=0

                      flag11=0flag12=0

                      m=0mm=0

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      while(1)

                      end of main programme

                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                      whenever specific time the interrupt will generate control will go in following function

                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if(sw1_op==0 ) ready switch flag for system1

                      my_delay(10) CALL DELAY FUNCTION

                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                      if(flag7==1) SET THE FLAG

                      flag7=1

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                      flag9=1

                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                      flag11=1

                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if(sw2_op==0 ) fready switch flag for system2

                      my_delay (10)

                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                      if(flag5==1)

                      flag5=1

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                      flag9=1

                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                      flag11=1

                      elseflag11=0flag4=0REady_LED4=0

                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                      if(flag7==1)

                      flag7=1

                      else

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                      flag5=1

                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                      flag11=1

                      elseflag11=0flag4=0REady_LED4=0

                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                      if(flag7==1)

                      flag7=1

                      elseflag7=0

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      flag2=0REady_LED2=0 if(flag5==1)

                      flag5=1

                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                      flag9=1

                      elseflag9=0flag3=0REady_LED3=0

                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                      if(flag6==1)

                      i++ if (igt1000) ii++

                      if (flag8==1)

                      j++ if(jgt1000) jj++

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      if (flag10==1)

                      l++ if (lgt1000) ll++

                      if (flag12==1)

                      m++ if (mgt1000) mm++

                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 13

                      TROUBLE SHOOT

                      Troubleshoot

                      131 TROUBLE SHOOT

                      A newly assembled circuit does not work may be due to -

                      Faulty components

                      Improper soldering

                      Wrong connections

                      Also any stop in working after some period may be due to -

                      Component failure

                      Supply failure

                      Damaging of PCB

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Fault finding is very essential if you want the circuit to operate properly

                      If a newly assembled circuit is not working properly check all the components and

                      circuit connections according to the diagram The circuit may not be working due to wrong

                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                      proper soldering

                      If faults are not observed during physical observations one should proceed for Hot

                      test ie Voltage measurement at different points for example at Input terminal etc

                      Resistance measurement is also done which is known as Dry test

                      During this project work some green LEDs was not glow then we checked it

                      continuity and replace it

                      Also relay was not properly worked therefore we replaced it Some ICs was get

                      heated after starting the project It happens because of some soldering points are shorted

                      during soldering PCB We solved that problem

                      CHAPTER 14

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      ADVANTAGES OF

                      THE PROJECT

                      Advantages

                      141 ADVANTAGES OF THE PROJECT

                      Simple and hand efficient Microcontroller based system

                      Fast charging capacity

                      Simple to operate

                      Ease of mobility

                      Facilitates connectivity for 90 of cellular phones

                      Less expensive

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Reduced man power

                      Low power consumption

                      It can offer emergency charging for 4sets of handsets synchronously

                      CHAPTER 15

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      DISADVANTAGES

                      OF THE PROJECT

                      Disadvantages

                      151 DISADVANTAGES OF THE PROJECT

                      It requires mains supply to work project

                      Due to limited charging channels till now there may be a possibility that

                      mobile phones of few brands cannot be connected for charging For this

                      purpose we have to use separate connectors for that specific brand differently

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                      min

                      It does not have battery backup therefore it cannot be portable

                      CHAPTER 16

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      APPLICATIONS OF

                      THE PROJECT

                      Application

                      161 APPLICATIONS OF THE PROJECT

                      The coin based mobile phone charger is very useful to public for using coin to

                      charge for the mobile phone in any places

                      It is used for emergency charging purposes

                      It can be installed in malls railway stations bus stops and other public

                      places

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      The charger offers a unique revenue opportunity for a vast range of

                      businesses - from airports to pubs from universities to health clubs virtually

                      any location where there is a high footfall creating a large number of

                      potential users

                      It can be installed in offices and collages for pay charging facility

                      CHAPTER 17

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      FUTURE

                      DEVELOPMENT OF

                      THE PROJECT

                      FUTURE DEVELOPMENT OF THE PROJECT

                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                      This project is very useful to people who are using mobile phone without charging

                      condition in public places

                      It will use with a stereo advertisement carrier that can display video advertisement

                      It will provide battery backup for make it portable

                      It will also provide SMS system in future

                      We can also increase the charging time by editing software of the project

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 18

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      COST ANALYSIS

                      OF THE PROJECT

                      COST ANALYSIS OF THE PROJECT

                      181 COST ANALYSIS OF THE PROJECT

                      1811 Component list for power supply card

                      Footprint Quantity Designators Rate

                      Resistor

                      22K 1 R2 1

                      1K 1 R1 1

                      Capacitor

                      1000uf25V 1 C5 10

                      2200uf25V 1 C1 10

                      022uf 2 C6 C2 1

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                      Table 1811 Component list for power supply card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      01uf 2 C4 C3 1

                      IC

                      BRIDGE W10 2 BR2 BR1 10

                      L7812CV (TO-220) 1 U2 8

                      L7805CV (TO-220) 1 U1 8

                      Connector

                      CON PHO 2PIN 2 J3 J2 16

                      CON PHO 3PIN 1 J1 12

                      LED3mm red 2 L1 L2 15

                      Heat sink (TO-220) 2 16

                      Total 955

                      1812 Component list for battery charger card

                      Footprint Quantity Rate

                      Capacitor

                      2200uf25V 1 1000

                      022uf 4 100

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      01uf 4 100

                      IC

                      BRIDGE W10 1 500

                      L7805CV (TO-220) 4 3200

                      Connector

                      CON PHO 2PIN 1 800

                      Relimate 2 pin 1 400

                      relimate 3 pin 4 2000

                      Heat sink (TO-220) 4 1200

                      TOTAL 9300

                      1813 Component list for Relay card

                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                      Table 1812Component list for battery charger card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                      Total 18900

                      1814Component list for controller card

                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                      Table 1813Component list for relay card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                      total 27000

                      1815 Miscellaneous material

                      Material Quantity Rate

                      electronic item

                      Transformer

                      TXR1 0-9-15 1 20000

                      0-9 1A

                      0-15 100mA

                      TXR2 0-9 1 16500

                      0-9 1A

                      Proximity switch 1 20000

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                      Table 1814Component list for microcontroller card

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Red push bottom 4 4000

                      Green push button 1 1000

                      Red led 5mm 4 800

                      Green led 5mm 4 800

                      Led holder 8 1600

                      Copper clad 2 4000

                      3 core cable 1 meter 1500

                      3 pin plug 1 3000

                      2 pin relimate wire 19 9000

                      3 pin relimate wire 5 3750

                      4 pin relimate wire 2 2000

                      mechanical items

                      Enclosure 1 25000

                      Acrylic sheet 2 X 1 30000

                      12mm cable gland 1 1000

                      Screw 3mm 33 2000

                      Screw 35mm 6 2400

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      10 mm spacers 100 1500

                      10mm insert to stud 50 10000

                      cable tie 2500

                      Total 162350

                      CHAPTER 19

                      APPENDIX

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                      Table 1815Component list for miscellaneous material

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      APPENDIX

                      191 APPENDIX

                      1911 78xx IC datasheet

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1912 W10 datasheet

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1913 4n33 IC datasheet

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                      1914 MAX 232

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1915 ULN2003a IC datasheet

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      1916 89V51RD2 IC datasheet

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 20

                      CONCLUSION

                      CONCLUSION

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      201 CONCLUSION

                      The coin-operated mobile phone charger is already successfully installed in

                      hundreds of locations worldwide providing a unique service to the public and a source of

                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                      installed in any business premises

                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                      from airports to pubs from universities to health clubs virtually any location where there is

                      a high footfall creating a large number of potential users

                      The charger can charge up to 4 different mobile phones simultaneously It will

                      extend low mobile phone talk time provide battery charging

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 21

                      IMAGES OF THE

                      PROJECT

                      Images of the project

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      211 IMAGES OF THE PROJECT

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                      fig211 lsquoCoin operated mobile battery charger

                      Fig212 Circuit arrangement of coin operated mobile battery charger

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Fig 216 Relay driver circuit

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                      Fig 213 Constant voltage battery charger circuit

                      Fig214 Power supply circuit

                      Fig215 Metal detector proximity switch

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Fig217 Microcontroller circuit

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      Fig228 coin operated mobile battery charger project presentation

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      CHAPTER 22

                      BIBILOGRAPHY

                      BIBLIOGRAPHY

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                      221 BIBLIOGRAPHY

                      BOOKS

                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                      INTERNET LINKS

                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                      • CHAPTER 1

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        427 CHANNEL IN CHARGE INDICATION

                        It provides visual indication for the channel which is in

                        charging mode

                        428 RELAY ARRAY

                        Relay array consists of relays for each channel to

                        provide electromechanical switching in between charger and

                        mobile phone

                        429 CHARGER ARRAY

                        Charger array is used to provide charging power to the

                        mobile phones through the electromechanical switches

                        4210 CELL PHONE TO CHARGE

                        Channel select switch is used for selecting a channel on

                        which the mobile phone is to be charged

                        4211 MICROCONTROLLER

                        Microcontroller is used to control the whole operation of

                        the device Microcontroller reads input signal from input

                        device and triggers the output device According to the

                        conditions defined in the microcontroller by the programmer

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 12

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 5

                        CIRCUIT

                        DIAGRAM

                        EXPLANATION

                        Circuit diagram

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Circuit diagram explanation Working

                        51 POWER SUPPLY CIRCUIT

                        511 CIRCUIT DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                        Fig51 Circuit diagram of the power supply

                        Bridge RectifierTRANSFORMER

                        Filter Voltage regulator Load

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        512 WORKING

                        Transformer

                        A step-down transformer is used to achieve our requirements of the power

                        supply It steps down high voltage ac mains to low voltage ac mains

                        Bridge Rectifier

                        A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                        full wave rectification This is a widely used configuration both with individual

                        diodes wired and with single component bridges where the diode bridge is wired

                        internally It also converts ac to dc but the dc output is varying

                        One advantage of a bridge rectifier over a conventional full-wave rectifier is

                        that with a given transformer the bridge rectifier produces a voltage output that is

                        nearly twice that of the conventional full-wave circuit

                        Filter

                        The output of the rectifier is a pulsating dc wave We need a constant dc

                        output To do this we need to filter out the oscillation from the pulsating dc wave

                        This is obtained with a diode capacitor combination

                        Voltage Regulator

                        A voltage regulator is used for voltage regulation in the circuit This provides

                        a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                        dc output to fixed voltages

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                        Fig 52 Block diagram of the power supply

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Load

                        The load can be anything which wants to switch ON by using power supply

                        513 CIRCUIT DIAGRAM EXPLANATION

                        Regulated power supplies are commonly used in engineering projects Power

                        supply is food of any circuit

                        +5V SUPPLY UNIT

                        +5V supply is obtained from the +5V supply unit for microcontroller and

                        digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                        transformer having a capacity of 500mA

                        Since the input voltage to the regulator IC should be more than its output

                        voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                        of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                        smooth DC supply The rating of the chosen capacitor filter is 1000microF

                        The regulated DC voltage is obtained by using a regulator IC 7805 In the

                        case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                        Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                        output of regulator IC to eliminate the voltage oscillations at the output due to the large

                        voltage oscillations at the input of the regulator

                        +12V SUPPLY UNIT

                        The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                        arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                        step down transformer having a capacity of 1A and the center tap of the transformer is

                        grounded This low voltage is rectified with the help off bridge rectifier

                        Since the input voltage to the regulator IC should be more than its output

                        voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                        the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                        filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                        For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                        7912 is used

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                        the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                        connected at the output as shown in figure to eliminate the voltage oscillations at the

                        output due to the large voltage oscillations at the input of the regulator

                        52 CONSTANT VOLTAGE CHARGER

                        521 CIRCUIT DIAGRAM

                        Fig 53 Circuit diagram of the battery charger

                        522 CIRCUIT DIAGRAM EXPLANATION

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Constant-voltage (often called constant-potential) chargers maintain nearly the same

                        voltage input to the battery throughout the charging process regardless of the batterys state

                        of charge Constant-voltage chargers provide a high initial current to the battery because of

                        the greater potential difference between the battery and charger

                        A constant-voltage charger may return as much as 70 of the previous discharge in

                        the first 30 minutes This proves useful in many battery applications involving multiple

                        discharge scenarios As the battery charges its voltage increases quickly This reduces the

                        potential that has been driving the current with a corresponding rapid decrease in charge

                        current as depicted in the illustration below As a result even though the battery reaches

                        partial charge quickly obtaining a full charge requires prolonged charging

                        Given this behavior constant-voltage chargers are frequently found in applications

                        that normally allow extended charging periods to attain full charge Constant-voltage

                        chargers should not be used where there is frequent cycling of the battery Repeated

                        discharges without returning the cell to its full charge will eventually decrease the battery

                        capacity and may damage individual cells

                        Fig 54An Illustration graph of the charging function of constant battery charger

                        Constant-voltage chargers are most often used in two very different modes as a fast

                        charger to restore a high percentage of charge in a short time or as a float charger to

                        minimize the effects of overcharge on batteries having infrequent discharges

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        53 RELAY DRIVER CIRCUIT

                        531 CIRCUIT DIAGRAM

                        532 CIRCUIT DIAGRAM EXPLANATION

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                        Fig 55 Relay driver circuit

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Input from the controller is connected to the relay card through connector J1 which

                        carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                        pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                        These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                        relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                        series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                        and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                        relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                        NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                        3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                        RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                        is used to connect power supply to relay card

                        533 WORKING

                        While taking Relay1 (RL1) into consideration we will discuss the working of relay

                        card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                        of the IC are in cut off region which causes an open circuit so there is no current flow

                        flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                        applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                        completes the path ie provide ground to the relay coil so the current flows through the

                        LED activating the relay

                        As the current flows through the relay coil it gets energized and switch over the

                        contacts ie common and normally open contact get connected and provide a path to flow

                        current from J11 ie charger into the load connected at J4 hence the cell phone charging

                        process starts The same above process is applies for all relays If LED is fused or

                        damaged the path will be open and relay will not be energized and if relay is damaged the

                        led will not be illuminated So the LED here is used as a FAULT indicator and a

                        CHARGING ON indicator

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        54 MICROCONTORLLER CIRCUIT

                        541 CIRCUIT DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        542 CIRCUIT DIAGRAM EXPLANATION

                        CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                        the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                        port P04 through J4 and START switch is connected to port P05 through SW5

                        Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                        P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                        Output for relay card is taken on port P14 to P17

                        Components C1 R1 and push button S1 forms reset circuit which provides a power

                        on reset for the micro controller and even provide manual reset Crystal XL1 is a

                        110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                        22pf capacitor used as loading capacitor for crystal

                        Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                        RN2 resistance network

                        IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                        the proximity switch and microcontroller and convert its output readable to microcontroller

                        IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                        communication between PC and a microcontroller through connector J3

                        Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                        communication process

                        Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                        power supply connection

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        543 PORT ASSIGNMENTS FOR 89V51RD2FN

                        P00 = switch1 for channel 1

                        P01 = switch2 for channel 2

                        P02 = switch3 for channel 3

                        P03 = switch4 for channel 4

                        P04 = switch5 for coin input sensor (proximity switch)

                        P05 = switch6 for start charging

                        P10 = channel 1 red LED1 (ready system)

                        P11 = channel 2 red LED2 (ready system2)

                        P12 = channel 3 red LED3 (ready system3)

                        P13 = channel 4 red LED4 (ready system4)

                        P14 = channel 1 relay (start system1)

                        P15 = channel 2 relay (start system2)

                        P16 = channel 3 relay (start system3)

                        P17 = channel 4 relay (start system4)

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 6

                        LIST OF THE

                        COMPONENTS

                        List of the components

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        61 LIST OF THE COMPONETS

                        RESISTORS

                        CAPACITORS

                        LIGHT EMITING DIODES (LEDS)- Green Red

                        RELAYrsquoS-

                        TRANSFORMERS

                        RECTIFIER BRIDGES (W 10)

                        OSCILLATOR

                        SWITCHES- Push switches

                        DARLINGTON PAIR IC (ULN2003a)

                        SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                        SERIAL COMMUNICATION DRIVER IC (MAX 232)

                        OPTOCOUPLER IC (4N33)

                        MICROCONTROLLER IC (89V51 RD2)

                        RELIMATE CONNECTOR- 2 pin amp 4 pin

                        RS-232 PORT CONNECTOR

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 7

                        INTRODUCTION

                        OF COMPONENTS

                        Working of components

                        Features or Uses of components

                        Testing of components

                        71 RESISTOR

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        711 WORKING

                        Resistors limit current Resistors are considered to be the most used and the most

                        important component of all the electronic circuits Resistors resist the flow of electrical

                        current The higher the value of resistance (measured in ohms)

                        the lower the current will be

                        712 TESTING

                        Read the indicated color code value then select the OHM-scale within but not way

                        below the indicated value A resistor is good if its resistance is close to the indicated

                        Tolerance should be considered with the ohmmeter reading While no resistance reading at

                        all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                        ohmmeter scale settings resistor is shorted

                        713 SPECIFICATIONS

                        To completely specify a resistors characteristics requires knowledge of the following

                        parameters-

                        bull Value

                        bull Tolerance

                        bull Temperature Coefficient

                        bull Power Rating

                        The specification of a resistor may be marked on its surface using either of two

                        systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                        the second more recent system uses a combination of alpha-numeric characters

                        7 2 CAPACITOR

                        721 WORKING

                        When DC voltage is applied to the capacitor an electric charge is stored on each

                        electrode While the capacitor is charging up current flows The current will stop flowing

                        when the capacitor has fully charged Capacitors find use

                        in circuits for a variety of purposes They are used in

                        time delay generation RC circuits In power supplies for filtering and power supply

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        decoupling as blocking capacitors for power factor correction and motor starting in LC

                        tank circuits and so on

                        722 TESTING

                        To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                        negative probe to the capacitor positive terminal the positive probe to the negative terminal

                        A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                        and moves back again to infinite resistance position A defective indication for an

                        electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                        which is an indication that the capacitor is shorted

                        73 LIGHT EMITING DIODE (LED)

                        731 WORKING

                        LEDs are special diodes that emit light when

                        connected in a circuit They are frequently used as pilot lights in electronic appliances to

                        indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                        the heart of an LED the semi-conductor chip

                        In our project Green LED are used here for mainly two purpose

                        a Charging ON indication (when ON)

                        b Channel fault indication (always OFF)

                        732 TESTING

                        The good and working LED will then light up or glow a busted LED will not LEDs

                        must have a resistor in series to limit the current to a safe value for quick testing purposes a

                        1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                        directly connected to a battery or power supply It will be destroyed the LED

                        733 FEATURES

                        Single color

                        High bright output

                        Low power consumption

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        High reliability and long life

                        734 Descriptions

                        Dice material GaInN

                        Emitting Color Super Bright White

                        Device Outlineφ5mm Round Type

                        Lens Type Water Clear

                        74 RELAY

                        741 WORKING

                        A relay is an electrically operated switch Current

                        flowing through the coil of the relay creates a magnetic field

                        which attracts a lever and changes the switch contacts The coil

                        current can be on or off so relays have two switch positions and

                        most have double throw (changeover) switch contacts

                        Relays are like remote control switches and are used in

                        many applications because of their relative simplicity long life

                        and proven high reliability

                        742 USES

                        The main operation of a relay comes in places where only a low-power signal can be

                        used to control a circuit

                        It is also used in places where only one signal can be used to control a lot of circuits

                        The application of relays started during the invention of telephones They played an

                        important role in switching calls in telephone exchanges They were also used in

                        long distance telegraphy They were used to switch the signal coming from one

                        source to another destination

                        743 TESTING

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        A relay will usually have a coil pole terminal and a set of

                        contacts The set of contacts that are open when the relay is not

                        energized are called normally open (NO) contacts and the set of

                        contacts that are closed when the relay is not energized are called

                        normally closed (NC) contacts The following steps can be used to perform the testing of

                        the relay using a multimeter

                        Keep the multimeter in the continuity check mode

                        Check for continuity between the NC contacts and pole

                        Check for discontinuity between NO contacts and the pole

                        Now energies the relay using the rated voltage For example use a 9V battery for

                        energizing a 9V relay The relay will engage with clicking sound

                        Now check for continuity between NO contacts and pole

                        Also check for discontinuity between NC contacts and pole

                        As a final test measure the resistance of the relay coil using a multimeter and check

                        whether it is matching to the value stated by the manufacturer

                        If all the above tests are positive we can conclude that the relay is healthy

                        75 TRANSFORMER

                        751 WORKING

                        A transformer is a device that transfers electrical energy

                        from one circuit to another through inductively coupled

                        electrical conductors A changing current in the first circuit (the

                        primary) creates a changing magnetic field

                        This changing magnetic field induces a changing voltage in the second circuit (the

                        secondary) This effect is called mutual induction

                        If a load is connected to the secondary circuit electric charge will flow in the

                        secondary winding of the transformer and transfer energy from the primary circuit to the

                        load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                        of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                        number of primary turns

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        By appropriate selection of the numbers of turns a transformer thus allows an

                        alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                        making it less

                        752 TESTING

                        1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                        scale and then adjusting the knob to verify its reading is an easy step to the

                        reading of the ohm

                        2 To check the resistance of the coil unplug or unsolder the leads of the

                        transformer from its circuit and measure the resistance of each coil

                        3 The next step is to test each coil for shorts to other coils

                        76 RECTIFIER BRIDGE (W 10)

                        761 WORKING

                        A diode bridge rectifier is a device for converting AC or

                        alternating current electricity into DC or direct current AC

                        electricity goes from positive to negative constantly whereas DC

                        always flows in the same direction

                        AC electricity is more efficient to transmit and easier to

                        convert into different voltages However most appliances need DC current to run A diode

                        bridge rectifier is the most common type of power supply used to provide this current In

                        our project W10 is a bridge rectifier which provides on single semiconductor chip

                        77 OSCILLATOR

                        771 Working

                        An oscillator puts out an endless series of pulses The output

                        constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        all digital circuits have some type of oscillator This stream of output pulses is often

                        called a clock One of the most important features of any oscillator is its frequency stability

                        or in other words its ability to provide a constant frequency output under varying load

                        conditions Some of the factors that affect the frequency stability of an oscillator include

                        temperature variations in the load and changes in the DC power supply Frequency stability

                        of the output signal can be improved by the proper selection of the components used for the

                        resonant feedback circuit including the amplifier but there is a limit to the stability that can

                        be obtained from normal LC and RC tank circuits

                        In our project instead of 12MHz crystal 110592MHz is used because it can be

                        divided to give you exact clock rates for most of the common baud rates for the UART

                        especially for the higher speeds (9600 19200) These crystals are readily available and

                        commonly used

                        78 SWITCH

                        781 WORKING

                        The most familiar form of switch is a manually operated

                        electromechanical device with one or more sets of electrical contacts

                        Each set of contacts can be in one of two states either closed meaning

                        the contacts are touching and electricity can flow between them or

                        open meaning the contacts are separated and the switch is non

                        conducting The mechanism actuating the transition between these two

                        states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                        momentary (push-for on or push-for off) type

                        782 USES

                        In electronics a switch is an electrical component that can break an electrical

                        circuit interrupting the current or diverting it from one conductor to another

                        783 TESTING

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        When the switch is ON it looks and acts like a wire When the switch is OFF there is

                        no connection Switch can tested by using multimeter in continuity range

                        79 DARLINGTON PAIR IC (ULN2003a)

                        791 WORKING

                        The Darlington transistor (often called a Darlington pair) is a

                        compound structure consisting of two bipolar transistors (either

                        integrated or separated devices) connected in such a way that the

                        current amplified by the first transistor is amplified further by the

                        second one This configuration gives a much higher current gain than

                        each transistor taken separately and in the case of integrated devices

                        can take less space than two individual transistors because they can

                        use a shared collector

                        Integrated Darlington pairs come packaged singly in

                        transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                        The Darlington transistor array used is ULN2003 Applications include relay

                        drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                        drivers and logic buffers Each input of this device has a zener diode and resistor in series

                        to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                        for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                        792 FEATURES

                        The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                        transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                        with common-cathode clamp diodes for switching inductive loads The collector-current

                        rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                        higher current capability

                        710 SERIES VOLTAGE REGULATER IC (78XX)

                        7101 WORKING

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Voltage Regulator (regulator) usually having three legs converts varying input

                        voltage and produces a constant regulated output voltage They are available in a variety of

                        outputs

                        The most common part numbers start with the numbers 78 or 79 and finish with two

                        digits indicating the output voltage The number 78 represents positive voltage and 79

                        negative one The 78XX series of voltage regulators are designed for positive input

                        The LM78XX series typically has the ability to drive current up to 1A For

                        application requirements up to 150mA 78LXX can be used As mentioned above the

                        component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                        an output leg with the regulators voltage

                        As a general rule the input voltage should be limited to 2 to 3 volts above the output

                        voltage The LM78XX series can handle up to 36 volts input be advised that the power

                        difference between the input and output appears as heat If the input voltage is unnecessarily

                        high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                        sinking the regulator will shut down

                        711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                        7111 WORKING

                        The MAX-232 It includes a Charge Pump which generates

                        +10V and -10V from a single 5v supply

                        This IC also includes two receivers and two transmitters in

                        the same package This is handy in many cases when we only want to

                        use the Transmit and Receive data Lines We dont need to use two chips one for the

                        receive line and one for the transmit There are also many variations of these devices The

                        large value of capacitors are not only bulky but also expensive Therefore other devices are

                        available which use smaller capacitors and even some with inbuilt capacitors However the

                        MAX-232 is the most common and thus we will use this RS-232 Level Converter

                        Dual Charge-Pump Voltage Converter

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                        V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                        output

                        712 OPTOCOUPLER IC (4N33)

                        7121 WORKING

                        In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                        photoMOS) is a device that uses a short optical transmission path to transfer a signal

                        between elements of a circuit typically a transmitter and a receiver while keeping them

                        electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                        back to an electrical signal electrical contact along the path is broken

                        Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                        essentially a combination of two distinct devices an optical transmitter typically a gallium

                        arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                        light-triggered diac The two are separated by a transparent barrier which blocks any

                        electrical current flow between the two but does allow the passage of light

                        The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                        silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                        of isolation between driving and load circuits These Optocouplers can be used to replace

                        reed and mercury relays with advantages of long life high speed switching and elimination

                        of magnetic field

                        713 MICROCONTROLLER IC (89V51 RD 2 )

                        713 WORKING

                        The P89V51RD2 is an 80C51 microcontroller with 64

                        kB Flash and 1024 bytes of data RAM

                        A key feature of the P89V51RD2 is its X2 mode option

                        The design engineer can choose to run the application with the conventional 80C51 clock

                        rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        achieve twice the throughput at the same clock frequency Another way to benefit from this

                        feature is to keep the same performance by reducing the clock frequency by half thus

                        dramatically reducing the EMI

                        The Flash program memory supports both parallel programming and in serial In-

                        System Programming (ISP) Parallel programming mode offers gang-programming at high

                        speed reducing programming costs and time to market ISP allows a device to be

                        reprogrammed in the end product under software control The capability to fieldupdate the

                        application firmware makes a wide range of applications possible The P89V51RD2 is also

                        In-Application Programmable (IAP) allowing the Flash program memory to be

                        reconfigured even while the application is running

                        714 RELIMATE CONNECTOR

                        7141 WORKING

                        These are wire to board type connectors used to facilitate

                        proper and firm electrical connection between the relay card and

                        microcontroller card

                        The connector has following specifications

                        No of Ways 2-20

                        Voltage Rating 250V AC DC

                        Current Rating 3A AC DC

                        Contact Resistance 20mW max

                        Insulation Resistance 1000MW min

                        Dielectric Withstanding 1000V ACminute

                        Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                        The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                        connector is it provides a fast and easy connection and disconnection it also avoids polarity

                        conflicts

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        715 RS-232 PORT CONNECTOR

                        7151 WORKING

                        Almost all digital devices which we use require either TTL

                        or CMOS logic levels Therefore the first step to connecting a

                        device to the RS-232 port is to transform the RS-232 levels back

                        into 0 and 5 Volts This is done by RS-232 Level Converters

                        Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                        Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                        The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                        problem in many instances where only a single supply of +5V is present

                        CHAPTER 8

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        IMPLIMENTATION

                        OF THE PCB

                        Components layout designing

                        Developing or Etching the PCB

                        Other operations like Drilling Cutting Tinning

                        81 IMPLIMENTATION OF THE PCB

                        A proper PCB ensure that various circuit components are interconnected as per the

                        circuit diagram once they have been placed on the PCB in their proper positions and

                        subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                        base material to which is permanently attached a flat metallic network of conducting path

                        whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                        for this project is single one

                        The basic material used may be resin coated paper fiber glass ceramic and the flat

                        board configuration however is most widely used and it may be of the nature of the single

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                        which ensures adequate and permanent low resistance coupling

                        811 BOARD DESIGN

                        PCB designed is the most important and requires great care during work In this case

                        great care must be taken while tracing the circuit or layout on the board Because once PCB

                        is designed it is virtually impossible to alter it While designing a circuit designer should

                        take care to avoid crossing of conducting path (tracks) as possible Crossover are

                        unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                        also help to solve this problem when circuit is complicated

                        812 THE MASTER DIAGRAM

                        The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                        which is commonly made twice as the finished circuit since this makes the working on that

                        much easier especially when circuit is complicated photography eventually reduces the

                        size of diagram to that of the circuit before proceeding we must know some rules regarding

                        the designing -

                        a The space between the conductors must be strictly controlled to avoid the possibility

                        of electrical discharges or unwanted capacitance The amount by which the mater

                        diagram is to reduce in size is thus a critical deign feature

                        b The conductor must be wider in those part of the circuits that are going to handle

                        large current must be handle without undue temperature of conductors

                        c The minimum width of copper should not generally be less than about 15mmThis

                        is related to mechanical strength rather than electrical properties and it also ensure

                        that strips remains securely bounded to the base material

                        d The points where the component holes for component lead wire occurs must be sited

                        to suit the dimensions of the component and dimensions between lead-out wire so

                        that the components can be situated correctly on finished board The conductor is

                        also main large at the point of holes

                        813 PCB MAKING

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        When the mater diagram probable twice the size of real PCB has been evolved the

                        test major step consists of etching or dissolving the unwanted metal from copper claded

                        board to create a circuit as depicted by master diagram It must be stressed that very

                        accurate checking master is essential at this stage Then the master point is mounted on a

                        special frame on easy facing of a larger camera and with the aid of the very powerful

                        illumination a master diagram is clearly photographed on a glass sensitive plate This is

                        developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                        brought into operation This comprises the camera body mounted so that sideways after

                        each exposure In this way number of copies of the original master diagram is set out

                        exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                        In case of simple and need of number of less PCB economic and advisable to use the

                        following lab method of PCB making

                        Planning The Circuit

                        It is not a particular difficult There are several important factors that need not be

                        taken into account if the finished device is to work properly we must consider gain factor

                        and ensure that the input and output parts are sufficiently well isolated to avoid the

                        possibility We must also ensure that conductors and components carrying high frequency

                        current are well separated from the part of the circuit We are also to make sure that all

                        components need to return to earth are properly connected and that possibility of common

                        impedance arising earth returned

                        Circuit is totally eliminated by making all earth as substantial possible consistent

                        with nature of design Other factors that have to successfully studied include availability of

                        adequate return points on board and itrsquos mounting from accessibility of switch connection

                        made for mechanical fixing ventilation effect of vibration

                        Cleaning The Board

                        The copper side of the board must be thoroughly cleaned before circuit plan is

                        transferred to it This is important because even slightest trace of graze (from figure of

                        instance) will impure the etching process and when the circuit plan has been neatly

                        transferred to copper in this manner the board is held under running tap and the allowed to

                        dry before resist is applied

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Transforming the Plan

                        Now once cleaning is done plan has to transfer on copper surface of PCB material

                        A convenient way to do this is simply put the carbon paper between a copper surface of the

                        board and working plan and carefully trace the lines of original plan with a ball pen

                        Resist

                        Resist is nothing more than a substrate that is unaffected by presence etching

                        chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                        clearly worked on clean copper that are to be left in fact as the copper conductor must be

                        covered when resists the leaguer type of paints possess good resist properties but

                        disadvantage of relatively long time taken for drying It is essential to resist through

                        hardening before etching is started Nail polished are better as they quickly and are less

                        difficult to remove

                        To overcome this drying effect and to achieve the sharp edge of the trace on the

                        PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                        short circulating due to paints are completely the avoid etching tapes and pads are available

                        in different sizes

                        Correcting Error

                        When a result has been thoroughly hardened any errors that have been made can

                        usually be corrected by gently scratching away with knife To ensure clear out lines round

                        edges of copper conductors on board the resist must be applied with steady band

                        Etching

                        Next comes etching of unwanted copper amp whether a small single is all that is

                        required as quantity of board to be produce certain precautions must be taken before

                        operation is commenced the most used etch amp I ferrite chloride to this is added small

                        quantity of HCL to accelerate But not critical as lab construction concerned A good

                        etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                        grams of water

                        Agitation

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                        the etchant process The depth of liquid must be sufficient to completely cover laminate the

                        laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                        gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                        temperature and thickness of copper foil

                        Finishing Off

                        When all unwanted copper is dissolved from areas between conductor board should

                        be taken from an etchant amp washed in water The resist must be removed using proper

                        solvent After this the copper surface must be polished with any kind of cleaner It should be

                        seen that there is no slight incomplete etching between the conducting parts of the PCB The

                        PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                        This process is called Tinning This process of coating involve track with soldier

                        Advantage of tinning the effect of environment of conductors then PCB is drilled

                        ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                        Assembling On PCB

                        After the holes are drilled the component have to be assembled on PCB before

                        assembling the components it is necessary to clean soldering iron in order to get easy amp

                        accurate soldering Removing impurity particles that are gathered on iron bit due to

                        repetitive use cleans soldering iron

                        CHAPTER 9

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        SOLDERING

                        TECHNIQUE

                        Technique for good soldering

                        91 SOLDERING TECHNIQUE

                        For soldering of any joints first the terminal to be soldered are cleaned to remove

                        oxide film or dirt on it If required flux is applied on the points to be soldered

                        Now the joint to be soldered is heated with the help of soldering iron Heat

                        applied should be such that when solder wire is touched to joint it must melt

                        quickly

                        The joint and the soldering iron is held such that molten solder should flow

                        smoothly over the joint

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        When joint is completely covered with molten solder the soldering iron is re-

                        moved

                        The joint is allowed to cool without any movement

                        The bright shining solder indicates good soldering

                        In case of dry solder joint a air gap remains in between the solder material and

                        the joint It means that soldering is improper This is removed and again solder-

                        ing is done

                        Thus this way all the components are soldered on P C B

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 10

                        PCB LAYOUTS

                        Schematic diagram

                        Bottom and top layout

                        101 POWER SUPPLY CARD

                        1011 SCHIMETIC DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1012 LEGEND MARKING

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                        Fig1011 Schematic diagram of power supply card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1013TOP LAYER

                        1014 BOTTOM LAYER

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                        Fig1013 Top layer of power supply

                        card

                        Fig1014 Schematic diagram of power supply card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        102 BATTERY CHARGER CARD

                        1021 SCHEMATIC DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                        Fig1021 Schematic diagram of battery charger card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        103 RELAY CARD

                        1031 SCHIMETIC DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                        Fig1031 Schematic diagram of Relay card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1032 RELAY CARD LEGEND MARKING

                        1033 TOP LAYER

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                        Fig1032 Legend marking of Relay card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1034 BOTTOM LAYER

                        104 MICROCONTROLER CARD

                        1041 SCHIMETIC DIAGRAM

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                        Fig1034 Bottom layer of Relay card

                        Fig1041 Schematic diagram of microcontroller card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1042 ALL LAYERS

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                        Fig1042 All layer of microcontroller card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 11

                        INTRODUCTION

                        OF SOFTWARE

                        Keil (microVision 2)

                        Eagle (Easily Applicable Graphical Layout Editor)

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        111 Keil (microVision 2)

                        1111 Introduction to C51 Cross Compiler

                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                        generates object code that matches the efficiency and speed of assembly programming

                        Using a high-level language like C has many advantages over assembly language

                        programming

                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                        the memory structure of the 8051 CPU is desirable (but not necessary)

                        Details like register allocation and addressing of the various memory types and data

                        types is managed by the compiler

                        Programs get a formal structure (which is imposed by the C programming language) and

                        can be divided into separate functions This contributes to source code reusability as

                        well as better overall application structure

                        The ability to combine variable selection with specific operations improves program

                        readability

                        Keywords and operational functions that more nearly resemble the human thought

                        process may be used

                        Programming and program test time is drastically reduced

                        The C run-time library contains many standard routines such as formatted output

                        numeric conversions and floating-point arithmetic

                        Existing program parts can be more easily included into new programs because of

                        modular program construction techniques

                        The language C is a very portable language (based on the ANSI standard) that enjoys

                        wide popular support and is easily obtained for most systems Existing program

                        investments can be quickly adapted to other processors as needed

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1112 Software Development Cycle in Keil

                        When we use the Keil Software tools the

                        project development cycle is roughly the same as

                        it is for any other software development project

                        1 Create a project select the target chip from the

                        device database and configure the tool settings

                        2 Create source files in C or assembly

                        3 Build your application with the project

                        manager

                        4 Correct errors in source files

                        5 Test the linked application A block diagram of

                        the complete 8051 tool set may best illustrate the

                        development cycle

                        112 Eagle (Easily Applicable Graphical Layout Editor)

                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                        1121 Schematic Editor

                        In this one can develop amp design circuits for the required PCB

                        1122 Layout Editor

                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                        Fig 111 Software development in KEIL

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1123 Library Editor

                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                        1124 Auto Router

                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                        the PCB tracks designed

                        1125 Cam Processor

                        This is used to finally print the various layers of the designed PCB viz Top Layer

                        Bottom Layer Component Layer Masking Layer etc

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                        Start

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 12

                        INTRODUCTION

                        OF

                        PROGRAMMING

                        Flowchart of programming

                        Program code

                        121 Flowchart

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                        2

                        flag9==1

                        flag9=1

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                        flag11==1

                        flag11=1 flag11=0 flag4=0

                        REady_LED4=0

                        Sw2_op (P01) ==0

                        My delay (10)

                        3 3

                        flag2=1 disp2=1 k2=0

                        3

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                        4

                        flag11==1

                        flag11=0 flag4=0 REady_LED4=0

                        flag11=1

                        My delay (10)

                        flag3=1 disp3=1 k3=0

                        k1==0||k2==0||k4==0

                        Sw3_op (P02) ==0

                        5

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                        flag5==1

                        5

                        flag11==1

                        flag7=1

                        flag7==1

                        flag7=0 flag2=0 REady_LED2=0

                        6

                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                        flag11=0 flag4=0 REady_LED4=0

                        flag11=1

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                        6

                        My delay (10)

                        flag4=1 disp4=1 k4=0

                        k1==0||k2==0||k3==0 flag5==1

                        7

                        Sw4_op (P03) ==0

                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                        7

                        flag7==1

                        flag9==1

                        flag7=1

                        flag7=0 flag2=0 REady_LED2=0

                        flag9=0 flag3=0 REady_LED3=0

                        flag9=1

                        Sw5_op A(P04) ==0

                        My delay (10)

                        8

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                        9

                        flag2==1

                        flag3==1

                        8

                        flag1==1

                        flag4==1 flag5=1 disp5=1

                        flag9=1 disp5=1

                        flag7=1 disp5=1

                        flag11=1 disp5=1

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                        Sw6_op (P05) ==0

                        My delay (10)

                        flag2==1 ampamp flag7==1

                        flag3==1 ampamp flag9==1 9

                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                        flag8=1 disp6=1

                        10

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                        10

                        flag4==1 ampamp flag11==1

                        flag10=1 disp6=1

                        flag12=1 disp6=1

                        flag8==1

                        flag10==1

                        11

                        flag6==1

                        i++

                        l++

                        j++

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                        flag12==1

                        M++

                        11

                        Stop

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        122 Program

                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                        define buzzerP2_0 buzzer indication

                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                        sbit sw5_op=P0^4 input switch5 for coin

                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                        output Led for indication

                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                        function prototype declaration

                        void my_delay(unsigned int value) DELAY FUCTION

                        void init_timer() timer 0 initialization function

                        variable declaration

                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        start of main programme

                        void main()

                        init_timer() call it timer initialization function

                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                        start of while loop

                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                        condition for switch1

                        if(flag1==1) check swich1 pressed if(disp1==1 )

                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                        if(iltk) loop will repeat for desired time of charging

                        if(igt=1000)

                        buzzer=1 turn on buzzer if (ii==20)

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        REady_LED1=1 turn on ready indication of led1

                        else if(ii==40)

                        REady_LED1=0ii=0

                        elseREady_LED1=0

                        START_LED1=1

                        else

                        START_LED1=0

                        k1=1 buzzer=0

                        REady_LED1=0 flag1=0

                        flag5=0flag6=0

                        condition for switch2

                        if(flag2==1) check swich2 pressed if(disp2==1)

                        REady_LED2=1 turn on ready 2 led indication

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        disp2=0

                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                        if(jltk)

                        if(jgt1000) buzzer=1 if(jj==20)

                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                        elseREady_LED2=0

                        START_LED2=1

                        else START_LED2=0

                        REady_LED2=0 k2=1 buzzer=0

                        flag2=0flag7=0flag8=0

                        j=0jj=0

                        condition for switch 3

                        if(flag3==1) check swich3 pressed

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        if(disp3==1 )

                        REady_LED3=1 disp3=0

                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                        if(lltk)

                        if(lgt1000) buzzer=1 if(ll==20)

                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                        elseREady_LED3=0

                        START_LED3=1

                        else START_LED3=0

                        LED2=0 k3=1 buzzer=0

                        REady_LED3=0 flag3=0

                        flag9=0flag10=0

                        l=0ll=0

                        condition for switch 4

                        if(flag4==1) check swich4 pressed if(disp4==1 )

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        REady_LED4=1 disp4=0

                        if(flag11==1) check coin is pressed

                        if(flag12==1) START is pressed

                        if(mltk)

                        if(mgt1000)

                        buzzer=1 if(mm==20)

                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                        elseREady_LED4=0

                        START_LED4=1

                        else START_LED4=0

                        buzzer=0 k4=1

                        REady_LED4=0 flag4=0

                        flag11=0flag12=0

                        m=0mm=0

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        while(1)

                        end of main programme

                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                        whenever specific time the interrupt will generate control will go in following function

                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if(sw1_op==0 ) ready switch flag for system1

                        my_delay(10) CALL DELAY FUNCTION

                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                        if(flag7==1) SET THE FLAG

                        flag7=1

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                        flag9=1

                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                        flag11=1

                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if(sw2_op==0 ) fready switch flag for system2

                        my_delay (10)

                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                        if(flag5==1)

                        flag5=1

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                        flag9=1

                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                        flag11=1

                        elseflag11=0flag4=0REady_LED4=0

                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                        if(flag7==1)

                        flag7=1

                        else

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                        flag5=1

                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                        flag11=1

                        elseflag11=0flag4=0REady_LED4=0

                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                        if(flag7==1)

                        flag7=1

                        elseflag7=0

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        flag2=0REady_LED2=0 if(flag5==1)

                        flag5=1

                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                        flag9=1

                        elseflag9=0flag3=0REady_LED3=0

                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                        if(flag6==1)

                        i++ if (igt1000) ii++

                        if (flag8==1)

                        j++ if(jgt1000) jj++

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        if (flag10==1)

                        l++ if (lgt1000) ll++

                        if (flag12==1)

                        m++ if (mgt1000) mm++

                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 13

                        TROUBLE SHOOT

                        Troubleshoot

                        131 TROUBLE SHOOT

                        A newly assembled circuit does not work may be due to -

                        Faulty components

                        Improper soldering

                        Wrong connections

                        Also any stop in working after some period may be due to -

                        Component failure

                        Supply failure

                        Damaging of PCB

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Fault finding is very essential if you want the circuit to operate properly

                        If a newly assembled circuit is not working properly check all the components and

                        circuit connections according to the diagram The circuit may not be working due to wrong

                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                        proper soldering

                        If faults are not observed during physical observations one should proceed for Hot

                        test ie Voltage measurement at different points for example at Input terminal etc

                        Resistance measurement is also done which is known as Dry test

                        During this project work some green LEDs was not glow then we checked it

                        continuity and replace it

                        Also relay was not properly worked therefore we replaced it Some ICs was get

                        heated after starting the project It happens because of some soldering points are shorted

                        during soldering PCB We solved that problem

                        CHAPTER 14

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        ADVANTAGES OF

                        THE PROJECT

                        Advantages

                        141 ADVANTAGES OF THE PROJECT

                        Simple and hand efficient Microcontroller based system

                        Fast charging capacity

                        Simple to operate

                        Ease of mobility

                        Facilitates connectivity for 90 of cellular phones

                        Less expensive

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Reduced man power

                        Low power consumption

                        It can offer emergency charging for 4sets of handsets synchronously

                        CHAPTER 15

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        DISADVANTAGES

                        OF THE PROJECT

                        Disadvantages

                        151 DISADVANTAGES OF THE PROJECT

                        It requires mains supply to work project

                        Due to limited charging channels till now there may be a possibility that

                        mobile phones of few brands cannot be connected for charging For this

                        purpose we have to use separate connectors for that specific brand differently

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                        min

                        It does not have battery backup therefore it cannot be portable

                        CHAPTER 16

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        APPLICATIONS OF

                        THE PROJECT

                        Application

                        161 APPLICATIONS OF THE PROJECT

                        The coin based mobile phone charger is very useful to public for using coin to

                        charge for the mobile phone in any places

                        It is used for emergency charging purposes

                        It can be installed in malls railway stations bus stops and other public

                        places

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        The charger offers a unique revenue opportunity for a vast range of

                        businesses - from airports to pubs from universities to health clubs virtually

                        any location where there is a high footfall creating a large number of

                        potential users

                        It can be installed in offices and collages for pay charging facility

                        CHAPTER 17

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        FUTURE

                        DEVELOPMENT OF

                        THE PROJECT

                        FUTURE DEVELOPMENT OF THE PROJECT

                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                        This project is very useful to people who are using mobile phone without charging

                        condition in public places

                        It will use with a stereo advertisement carrier that can display video advertisement

                        It will provide battery backup for make it portable

                        It will also provide SMS system in future

                        We can also increase the charging time by editing software of the project

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 18

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        COST ANALYSIS

                        OF THE PROJECT

                        COST ANALYSIS OF THE PROJECT

                        181 COST ANALYSIS OF THE PROJECT

                        1811 Component list for power supply card

                        Footprint Quantity Designators Rate

                        Resistor

                        22K 1 R2 1

                        1K 1 R1 1

                        Capacitor

                        1000uf25V 1 C5 10

                        2200uf25V 1 C1 10

                        022uf 2 C6 C2 1

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                        Table 1811 Component list for power supply card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        01uf 2 C4 C3 1

                        IC

                        BRIDGE W10 2 BR2 BR1 10

                        L7812CV (TO-220) 1 U2 8

                        L7805CV (TO-220) 1 U1 8

                        Connector

                        CON PHO 2PIN 2 J3 J2 16

                        CON PHO 3PIN 1 J1 12

                        LED3mm red 2 L1 L2 15

                        Heat sink (TO-220) 2 16

                        Total 955

                        1812 Component list for battery charger card

                        Footprint Quantity Rate

                        Capacitor

                        2200uf25V 1 1000

                        022uf 4 100

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        01uf 4 100

                        IC

                        BRIDGE W10 1 500

                        L7805CV (TO-220) 4 3200

                        Connector

                        CON PHO 2PIN 1 800

                        Relimate 2 pin 1 400

                        relimate 3 pin 4 2000

                        Heat sink (TO-220) 4 1200

                        TOTAL 9300

                        1813 Component list for Relay card

                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                        Table 1812Component list for battery charger card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                        Total 18900

                        1814Component list for controller card

                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                        Table 1813Component list for relay card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                        total 27000

                        1815 Miscellaneous material

                        Material Quantity Rate

                        electronic item

                        Transformer

                        TXR1 0-9-15 1 20000

                        0-9 1A

                        0-15 100mA

                        TXR2 0-9 1 16500

                        0-9 1A

                        Proximity switch 1 20000

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                        Table 1814Component list for microcontroller card

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Red push bottom 4 4000

                        Green push button 1 1000

                        Red led 5mm 4 800

                        Green led 5mm 4 800

                        Led holder 8 1600

                        Copper clad 2 4000

                        3 core cable 1 meter 1500

                        3 pin plug 1 3000

                        2 pin relimate wire 19 9000

                        3 pin relimate wire 5 3750

                        4 pin relimate wire 2 2000

                        mechanical items

                        Enclosure 1 25000

                        Acrylic sheet 2 X 1 30000

                        12mm cable gland 1 1000

                        Screw 3mm 33 2000

                        Screw 35mm 6 2400

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        10 mm spacers 100 1500

                        10mm insert to stud 50 10000

                        cable tie 2500

                        Total 162350

                        CHAPTER 19

                        APPENDIX

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                        Table 1815Component list for miscellaneous material

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        APPENDIX

                        191 APPENDIX

                        1911 78xx IC datasheet

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1912 W10 datasheet

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1913 4n33 IC datasheet

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                        1914 MAX 232

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1915 ULN2003a IC datasheet

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        1916 89V51RD2 IC datasheet

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 20

                        CONCLUSION

                        CONCLUSION

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        201 CONCLUSION

                        The coin-operated mobile phone charger is already successfully installed in

                        hundreds of locations worldwide providing a unique service to the public and a source of

                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                        installed in any business premises

                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                        from airports to pubs from universities to health clubs virtually any location where there is

                        a high footfall creating a large number of potential users

                        The charger can charge up to 4 different mobile phones simultaneously It will

                        extend low mobile phone talk time provide battery charging

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 21

                        IMAGES OF THE

                        PROJECT

                        Images of the project

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        211 IMAGES OF THE PROJECT

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                        fig211 lsquoCoin operated mobile battery charger

                        Fig212 Circuit arrangement of coin operated mobile battery charger

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Fig 216 Relay driver circuit

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                        Fig 213 Constant voltage battery charger circuit

                        Fig214 Power supply circuit

                        Fig215 Metal detector proximity switch

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Fig217 Microcontroller circuit

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        Fig228 coin operated mobile battery charger project presentation

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        CHAPTER 22

                        BIBILOGRAPHY

                        BIBLIOGRAPHY

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                        221 BIBLIOGRAPHY

                        BOOKS

                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                        INTERNET LINKS

                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                        • CHAPTER 1

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 5

                          CIRCUIT

                          DIAGRAM

                          EXPLANATION

                          Circuit diagram

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 13

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Circuit diagram explanation Working

                          51 POWER SUPPLY CIRCUIT

                          511 CIRCUIT DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                          Fig51 Circuit diagram of the power supply

                          Bridge RectifierTRANSFORMER

                          Filter Voltage regulator Load

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          512 WORKING

                          Transformer

                          A step-down transformer is used to achieve our requirements of the power

                          supply It steps down high voltage ac mains to low voltage ac mains

                          Bridge Rectifier

                          A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                          full wave rectification This is a widely used configuration both with individual

                          diodes wired and with single component bridges where the diode bridge is wired

                          internally It also converts ac to dc but the dc output is varying

                          One advantage of a bridge rectifier over a conventional full-wave rectifier is

                          that with a given transformer the bridge rectifier produces a voltage output that is

                          nearly twice that of the conventional full-wave circuit

                          Filter

                          The output of the rectifier is a pulsating dc wave We need a constant dc

                          output To do this we need to filter out the oscillation from the pulsating dc wave

                          This is obtained with a diode capacitor combination

                          Voltage Regulator

                          A voltage regulator is used for voltage regulation in the circuit This provides

                          a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                          dc output to fixed voltages

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                          Fig 52 Block diagram of the power supply

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Load

                          The load can be anything which wants to switch ON by using power supply

                          513 CIRCUIT DIAGRAM EXPLANATION

                          Regulated power supplies are commonly used in engineering projects Power

                          supply is food of any circuit

                          +5V SUPPLY UNIT

                          +5V supply is obtained from the +5V supply unit for microcontroller and

                          digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                          transformer having a capacity of 500mA

                          Since the input voltage to the regulator IC should be more than its output

                          voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                          of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                          smooth DC supply The rating of the chosen capacitor filter is 1000microF

                          The regulated DC voltage is obtained by using a regulator IC 7805 In the

                          case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                          Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                          output of regulator IC to eliminate the voltage oscillations at the output due to the large

                          voltage oscillations at the input of the regulator

                          +12V SUPPLY UNIT

                          The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                          arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                          step down transformer having a capacity of 1A and the center tap of the transformer is

                          grounded This low voltage is rectified with the help off bridge rectifier

                          Since the input voltage to the regulator IC should be more than its output

                          voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                          the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                          filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                          For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                          7912 is used

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                          the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                          connected at the output as shown in figure to eliminate the voltage oscillations at the

                          output due to the large voltage oscillations at the input of the regulator

                          52 CONSTANT VOLTAGE CHARGER

                          521 CIRCUIT DIAGRAM

                          Fig 53 Circuit diagram of the battery charger

                          522 CIRCUIT DIAGRAM EXPLANATION

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Constant-voltage (often called constant-potential) chargers maintain nearly the same

                          voltage input to the battery throughout the charging process regardless of the batterys state

                          of charge Constant-voltage chargers provide a high initial current to the battery because of

                          the greater potential difference between the battery and charger

                          A constant-voltage charger may return as much as 70 of the previous discharge in

                          the first 30 minutes This proves useful in many battery applications involving multiple

                          discharge scenarios As the battery charges its voltage increases quickly This reduces the

                          potential that has been driving the current with a corresponding rapid decrease in charge

                          current as depicted in the illustration below As a result even though the battery reaches

                          partial charge quickly obtaining a full charge requires prolonged charging

                          Given this behavior constant-voltage chargers are frequently found in applications

                          that normally allow extended charging periods to attain full charge Constant-voltage

                          chargers should not be used where there is frequent cycling of the battery Repeated

                          discharges without returning the cell to its full charge will eventually decrease the battery

                          capacity and may damage individual cells

                          Fig 54An Illustration graph of the charging function of constant battery charger

                          Constant-voltage chargers are most often used in two very different modes as a fast

                          charger to restore a high percentage of charge in a short time or as a float charger to

                          minimize the effects of overcharge on batteries having infrequent discharges

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          53 RELAY DRIVER CIRCUIT

                          531 CIRCUIT DIAGRAM

                          532 CIRCUIT DIAGRAM EXPLANATION

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                          Fig 55 Relay driver circuit

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Input from the controller is connected to the relay card through connector J1 which

                          carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                          pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                          These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                          relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                          series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                          and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                          relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                          NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                          3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                          RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                          is used to connect power supply to relay card

                          533 WORKING

                          While taking Relay1 (RL1) into consideration we will discuss the working of relay

                          card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                          of the IC are in cut off region which causes an open circuit so there is no current flow

                          flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                          applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                          completes the path ie provide ground to the relay coil so the current flows through the

                          LED activating the relay

                          As the current flows through the relay coil it gets energized and switch over the

                          contacts ie common and normally open contact get connected and provide a path to flow

                          current from J11 ie charger into the load connected at J4 hence the cell phone charging

                          process starts The same above process is applies for all relays If LED is fused or

                          damaged the path will be open and relay will not be energized and if relay is damaged the

                          led will not be illuminated So the LED here is used as a FAULT indicator and a

                          CHARGING ON indicator

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          54 MICROCONTORLLER CIRCUIT

                          541 CIRCUIT DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          542 CIRCUIT DIAGRAM EXPLANATION

                          CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                          the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                          port P04 through J4 and START switch is connected to port P05 through SW5

                          Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                          P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                          Output for relay card is taken on port P14 to P17

                          Components C1 R1 and push button S1 forms reset circuit which provides a power

                          on reset for the micro controller and even provide manual reset Crystal XL1 is a

                          110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                          22pf capacitor used as loading capacitor for crystal

                          Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                          RN2 resistance network

                          IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                          the proximity switch and microcontroller and convert its output readable to microcontroller

                          IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                          communication between PC and a microcontroller through connector J3

                          Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                          communication process

                          Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                          power supply connection

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          543 PORT ASSIGNMENTS FOR 89V51RD2FN

                          P00 = switch1 for channel 1

                          P01 = switch2 for channel 2

                          P02 = switch3 for channel 3

                          P03 = switch4 for channel 4

                          P04 = switch5 for coin input sensor (proximity switch)

                          P05 = switch6 for start charging

                          P10 = channel 1 red LED1 (ready system)

                          P11 = channel 2 red LED2 (ready system2)

                          P12 = channel 3 red LED3 (ready system3)

                          P13 = channel 4 red LED4 (ready system4)

                          P14 = channel 1 relay (start system1)

                          P15 = channel 2 relay (start system2)

                          P16 = channel 3 relay (start system3)

                          P17 = channel 4 relay (start system4)

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 6

                          LIST OF THE

                          COMPONENTS

                          List of the components

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          61 LIST OF THE COMPONETS

                          RESISTORS

                          CAPACITORS

                          LIGHT EMITING DIODES (LEDS)- Green Red

                          RELAYrsquoS-

                          TRANSFORMERS

                          RECTIFIER BRIDGES (W 10)

                          OSCILLATOR

                          SWITCHES- Push switches

                          DARLINGTON PAIR IC (ULN2003a)

                          SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                          SERIAL COMMUNICATION DRIVER IC (MAX 232)

                          OPTOCOUPLER IC (4N33)

                          MICROCONTROLLER IC (89V51 RD2)

                          RELIMATE CONNECTOR- 2 pin amp 4 pin

                          RS-232 PORT CONNECTOR

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 7

                          INTRODUCTION

                          OF COMPONENTS

                          Working of components

                          Features or Uses of components

                          Testing of components

                          71 RESISTOR

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          711 WORKING

                          Resistors limit current Resistors are considered to be the most used and the most

                          important component of all the electronic circuits Resistors resist the flow of electrical

                          current The higher the value of resistance (measured in ohms)

                          the lower the current will be

                          712 TESTING

                          Read the indicated color code value then select the OHM-scale within but not way

                          below the indicated value A resistor is good if its resistance is close to the indicated

                          Tolerance should be considered with the ohmmeter reading While no resistance reading at

                          all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                          ohmmeter scale settings resistor is shorted

                          713 SPECIFICATIONS

                          To completely specify a resistors characteristics requires knowledge of the following

                          parameters-

                          bull Value

                          bull Tolerance

                          bull Temperature Coefficient

                          bull Power Rating

                          The specification of a resistor may be marked on its surface using either of two

                          systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                          the second more recent system uses a combination of alpha-numeric characters

                          7 2 CAPACITOR

                          721 WORKING

                          When DC voltage is applied to the capacitor an electric charge is stored on each

                          electrode While the capacitor is charging up current flows The current will stop flowing

                          when the capacitor has fully charged Capacitors find use

                          in circuits for a variety of purposes They are used in

                          time delay generation RC circuits In power supplies for filtering and power supply

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          decoupling as blocking capacitors for power factor correction and motor starting in LC

                          tank circuits and so on

                          722 TESTING

                          To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                          negative probe to the capacitor positive terminal the positive probe to the negative terminal

                          A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                          and moves back again to infinite resistance position A defective indication for an

                          electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                          which is an indication that the capacitor is shorted

                          73 LIGHT EMITING DIODE (LED)

                          731 WORKING

                          LEDs are special diodes that emit light when

                          connected in a circuit They are frequently used as pilot lights in electronic appliances to

                          indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                          the heart of an LED the semi-conductor chip

                          In our project Green LED are used here for mainly two purpose

                          a Charging ON indication (when ON)

                          b Channel fault indication (always OFF)

                          732 TESTING

                          The good and working LED will then light up or glow a busted LED will not LEDs

                          must have a resistor in series to limit the current to a safe value for quick testing purposes a

                          1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                          directly connected to a battery or power supply It will be destroyed the LED

                          733 FEATURES

                          Single color

                          High bright output

                          Low power consumption

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          High reliability and long life

                          734 Descriptions

                          Dice material GaInN

                          Emitting Color Super Bright White

                          Device Outlineφ5mm Round Type

                          Lens Type Water Clear

                          74 RELAY

                          741 WORKING

                          A relay is an electrically operated switch Current

                          flowing through the coil of the relay creates a magnetic field

                          which attracts a lever and changes the switch contacts The coil

                          current can be on or off so relays have two switch positions and

                          most have double throw (changeover) switch contacts

                          Relays are like remote control switches and are used in

                          many applications because of their relative simplicity long life

                          and proven high reliability

                          742 USES

                          The main operation of a relay comes in places where only a low-power signal can be

                          used to control a circuit

                          It is also used in places where only one signal can be used to control a lot of circuits

                          The application of relays started during the invention of telephones They played an

                          important role in switching calls in telephone exchanges They were also used in

                          long distance telegraphy They were used to switch the signal coming from one

                          source to another destination

                          743 TESTING

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          A relay will usually have a coil pole terminal and a set of

                          contacts The set of contacts that are open when the relay is not

                          energized are called normally open (NO) contacts and the set of

                          contacts that are closed when the relay is not energized are called

                          normally closed (NC) contacts The following steps can be used to perform the testing of

                          the relay using a multimeter

                          Keep the multimeter in the continuity check mode

                          Check for continuity between the NC contacts and pole

                          Check for discontinuity between NO contacts and the pole

                          Now energies the relay using the rated voltage For example use a 9V battery for

                          energizing a 9V relay The relay will engage with clicking sound

                          Now check for continuity between NO contacts and pole

                          Also check for discontinuity between NC contacts and pole

                          As a final test measure the resistance of the relay coil using a multimeter and check

                          whether it is matching to the value stated by the manufacturer

                          If all the above tests are positive we can conclude that the relay is healthy

                          75 TRANSFORMER

                          751 WORKING

                          A transformer is a device that transfers electrical energy

                          from one circuit to another through inductively coupled

                          electrical conductors A changing current in the first circuit (the

                          primary) creates a changing magnetic field

                          This changing magnetic field induces a changing voltage in the second circuit (the

                          secondary) This effect is called mutual induction

                          If a load is connected to the secondary circuit electric charge will flow in the

                          secondary winding of the transformer and transfer energy from the primary circuit to the

                          load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                          of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                          number of primary turns

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          By appropriate selection of the numbers of turns a transformer thus allows an

                          alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                          making it less

                          752 TESTING

                          1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                          scale and then adjusting the knob to verify its reading is an easy step to the

                          reading of the ohm

                          2 To check the resistance of the coil unplug or unsolder the leads of the

                          transformer from its circuit and measure the resistance of each coil

                          3 The next step is to test each coil for shorts to other coils

                          76 RECTIFIER BRIDGE (W 10)

                          761 WORKING

                          A diode bridge rectifier is a device for converting AC or

                          alternating current electricity into DC or direct current AC

                          electricity goes from positive to negative constantly whereas DC

                          always flows in the same direction

                          AC electricity is more efficient to transmit and easier to

                          convert into different voltages However most appliances need DC current to run A diode

                          bridge rectifier is the most common type of power supply used to provide this current In

                          our project W10 is a bridge rectifier which provides on single semiconductor chip

                          77 OSCILLATOR

                          771 Working

                          An oscillator puts out an endless series of pulses The output

                          constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          all digital circuits have some type of oscillator This stream of output pulses is often

                          called a clock One of the most important features of any oscillator is its frequency stability

                          or in other words its ability to provide a constant frequency output under varying load

                          conditions Some of the factors that affect the frequency stability of an oscillator include

                          temperature variations in the load and changes in the DC power supply Frequency stability

                          of the output signal can be improved by the proper selection of the components used for the

                          resonant feedback circuit including the amplifier but there is a limit to the stability that can

                          be obtained from normal LC and RC tank circuits

                          In our project instead of 12MHz crystal 110592MHz is used because it can be

                          divided to give you exact clock rates for most of the common baud rates for the UART

                          especially for the higher speeds (9600 19200) These crystals are readily available and

                          commonly used

                          78 SWITCH

                          781 WORKING

                          The most familiar form of switch is a manually operated

                          electromechanical device with one or more sets of electrical contacts

                          Each set of contacts can be in one of two states either closed meaning

                          the contacts are touching and electricity can flow between them or

                          open meaning the contacts are separated and the switch is non

                          conducting The mechanism actuating the transition between these two

                          states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                          momentary (push-for on or push-for off) type

                          782 USES

                          In electronics a switch is an electrical component that can break an electrical

                          circuit interrupting the current or diverting it from one conductor to another

                          783 TESTING

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          When the switch is ON it looks and acts like a wire When the switch is OFF there is

                          no connection Switch can tested by using multimeter in continuity range

                          79 DARLINGTON PAIR IC (ULN2003a)

                          791 WORKING

                          The Darlington transistor (often called a Darlington pair) is a

                          compound structure consisting of two bipolar transistors (either

                          integrated or separated devices) connected in such a way that the

                          current amplified by the first transistor is amplified further by the

                          second one This configuration gives a much higher current gain than

                          each transistor taken separately and in the case of integrated devices

                          can take less space than two individual transistors because they can

                          use a shared collector

                          Integrated Darlington pairs come packaged singly in

                          transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                          The Darlington transistor array used is ULN2003 Applications include relay

                          drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                          drivers and logic buffers Each input of this device has a zener diode and resistor in series

                          to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                          for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                          792 FEATURES

                          The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                          transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                          with common-cathode clamp diodes for switching inductive loads The collector-current

                          rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                          higher current capability

                          710 SERIES VOLTAGE REGULATER IC (78XX)

                          7101 WORKING

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Voltage Regulator (regulator) usually having three legs converts varying input

                          voltage and produces a constant regulated output voltage They are available in a variety of

                          outputs

                          The most common part numbers start with the numbers 78 or 79 and finish with two

                          digits indicating the output voltage The number 78 represents positive voltage and 79

                          negative one The 78XX series of voltage regulators are designed for positive input

                          The LM78XX series typically has the ability to drive current up to 1A For

                          application requirements up to 150mA 78LXX can be used As mentioned above the

                          component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                          an output leg with the regulators voltage

                          As a general rule the input voltage should be limited to 2 to 3 volts above the output

                          voltage The LM78XX series can handle up to 36 volts input be advised that the power

                          difference between the input and output appears as heat If the input voltage is unnecessarily

                          high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                          sinking the regulator will shut down

                          711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                          7111 WORKING

                          The MAX-232 It includes a Charge Pump which generates

                          +10V and -10V from a single 5v supply

                          This IC also includes two receivers and two transmitters in

                          the same package This is handy in many cases when we only want to

                          use the Transmit and Receive data Lines We dont need to use two chips one for the

                          receive line and one for the transmit There are also many variations of these devices The

                          large value of capacitors are not only bulky but also expensive Therefore other devices are

                          available which use smaller capacitors and even some with inbuilt capacitors However the

                          MAX-232 is the most common and thus we will use this RS-232 Level Converter

                          Dual Charge-Pump Voltage Converter

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                          V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                          output

                          712 OPTOCOUPLER IC (4N33)

                          7121 WORKING

                          In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                          photoMOS) is a device that uses a short optical transmission path to transfer a signal

                          between elements of a circuit typically a transmitter and a receiver while keeping them

                          electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                          back to an electrical signal electrical contact along the path is broken

                          Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                          essentially a combination of two distinct devices an optical transmitter typically a gallium

                          arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                          light-triggered diac The two are separated by a transparent barrier which blocks any

                          electrical current flow between the two but does allow the passage of light

                          The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                          silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                          of isolation between driving and load circuits These Optocouplers can be used to replace

                          reed and mercury relays with advantages of long life high speed switching and elimination

                          of magnetic field

                          713 MICROCONTROLLER IC (89V51 RD 2 )

                          713 WORKING

                          The P89V51RD2 is an 80C51 microcontroller with 64

                          kB Flash and 1024 bytes of data RAM

                          A key feature of the P89V51RD2 is its X2 mode option

                          The design engineer can choose to run the application with the conventional 80C51 clock

                          rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          achieve twice the throughput at the same clock frequency Another way to benefit from this

                          feature is to keep the same performance by reducing the clock frequency by half thus

                          dramatically reducing the EMI

                          The Flash program memory supports both parallel programming and in serial In-

                          System Programming (ISP) Parallel programming mode offers gang-programming at high

                          speed reducing programming costs and time to market ISP allows a device to be

                          reprogrammed in the end product under software control The capability to fieldupdate the

                          application firmware makes a wide range of applications possible The P89V51RD2 is also

                          In-Application Programmable (IAP) allowing the Flash program memory to be

                          reconfigured even while the application is running

                          714 RELIMATE CONNECTOR

                          7141 WORKING

                          These are wire to board type connectors used to facilitate

                          proper and firm electrical connection between the relay card and

                          microcontroller card

                          The connector has following specifications

                          No of Ways 2-20

                          Voltage Rating 250V AC DC

                          Current Rating 3A AC DC

                          Contact Resistance 20mW max

                          Insulation Resistance 1000MW min

                          Dielectric Withstanding 1000V ACminute

                          Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                          The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                          connector is it provides a fast and easy connection and disconnection it also avoids polarity

                          conflicts

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          715 RS-232 PORT CONNECTOR

                          7151 WORKING

                          Almost all digital devices which we use require either TTL

                          or CMOS logic levels Therefore the first step to connecting a

                          device to the RS-232 port is to transform the RS-232 levels back

                          into 0 and 5 Volts This is done by RS-232 Level Converters

                          Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                          Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                          The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                          problem in many instances where only a single supply of +5V is present

                          CHAPTER 8

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          IMPLIMENTATION

                          OF THE PCB

                          Components layout designing

                          Developing or Etching the PCB

                          Other operations like Drilling Cutting Tinning

                          81 IMPLIMENTATION OF THE PCB

                          A proper PCB ensure that various circuit components are interconnected as per the

                          circuit diagram once they have been placed on the PCB in their proper positions and

                          subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                          base material to which is permanently attached a flat metallic network of conducting path

                          whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                          for this project is single one

                          The basic material used may be resin coated paper fiber glass ceramic and the flat

                          board configuration however is most widely used and it may be of the nature of the single

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                          which ensures adequate and permanent low resistance coupling

                          811 BOARD DESIGN

                          PCB designed is the most important and requires great care during work In this case

                          great care must be taken while tracing the circuit or layout on the board Because once PCB

                          is designed it is virtually impossible to alter it While designing a circuit designer should

                          take care to avoid crossing of conducting path (tracks) as possible Crossover are

                          unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                          also help to solve this problem when circuit is complicated

                          812 THE MASTER DIAGRAM

                          The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                          which is commonly made twice as the finished circuit since this makes the working on that

                          much easier especially when circuit is complicated photography eventually reduces the

                          size of diagram to that of the circuit before proceeding we must know some rules regarding

                          the designing -

                          a The space between the conductors must be strictly controlled to avoid the possibility

                          of electrical discharges or unwanted capacitance The amount by which the mater

                          diagram is to reduce in size is thus a critical deign feature

                          b The conductor must be wider in those part of the circuits that are going to handle

                          large current must be handle without undue temperature of conductors

                          c The minimum width of copper should not generally be less than about 15mmThis

                          is related to mechanical strength rather than electrical properties and it also ensure

                          that strips remains securely bounded to the base material

                          d The points where the component holes for component lead wire occurs must be sited

                          to suit the dimensions of the component and dimensions between lead-out wire so

                          that the components can be situated correctly on finished board The conductor is

                          also main large at the point of holes

                          813 PCB MAKING

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          When the mater diagram probable twice the size of real PCB has been evolved the

                          test major step consists of etching or dissolving the unwanted metal from copper claded

                          board to create a circuit as depicted by master diagram It must be stressed that very

                          accurate checking master is essential at this stage Then the master point is mounted on a

                          special frame on easy facing of a larger camera and with the aid of the very powerful

                          illumination a master diagram is clearly photographed on a glass sensitive plate This is

                          developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                          brought into operation This comprises the camera body mounted so that sideways after

                          each exposure In this way number of copies of the original master diagram is set out

                          exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                          In case of simple and need of number of less PCB economic and advisable to use the

                          following lab method of PCB making

                          Planning The Circuit

                          It is not a particular difficult There are several important factors that need not be

                          taken into account if the finished device is to work properly we must consider gain factor

                          and ensure that the input and output parts are sufficiently well isolated to avoid the

                          possibility We must also ensure that conductors and components carrying high frequency

                          current are well separated from the part of the circuit We are also to make sure that all

                          components need to return to earth are properly connected and that possibility of common

                          impedance arising earth returned

                          Circuit is totally eliminated by making all earth as substantial possible consistent

                          with nature of design Other factors that have to successfully studied include availability of

                          adequate return points on board and itrsquos mounting from accessibility of switch connection

                          made for mechanical fixing ventilation effect of vibration

                          Cleaning The Board

                          The copper side of the board must be thoroughly cleaned before circuit plan is

                          transferred to it This is important because even slightest trace of graze (from figure of

                          instance) will impure the etching process and when the circuit plan has been neatly

                          transferred to copper in this manner the board is held under running tap and the allowed to

                          dry before resist is applied

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Transforming the Plan

                          Now once cleaning is done plan has to transfer on copper surface of PCB material

                          A convenient way to do this is simply put the carbon paper between a copper surface of the

                          board and working plan and carefully trace the lines of original plan with a ball pen

                          Resist

                          Resist is nothing more than a substrate that is unaffected by presence etching

                          chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                          clearly worked on clean copper that are to be left in fact as the copper conductor must be

                          covered when resists the leaguer type of paints possess good resist properties but

                          disadvantage of relatively long time taken for drying It is essential to resist through

                          hardening before etching is started Nail polished are better as they quickly and are less

                          difficult to remove

                          To overcome this drying effect and to achieve the sharp edge of the trace on the

                          PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                          short circulating due to paints are completely the avoid etching tapes and pads are available

                          in different sizes

                          Correcting Error

                          When a result has been thoroughly hardened any errors that have been made can

                          usually be corrected by gently scratching away with knife To ensure clear out lines round

                          edges of copper conductors on board the resist must be applied with steady band

                          Etching

                          Next comes etching of unwanted copper amp whether a small single is all that is

                          required as quantity of board to be produce certain precautions must be taken before

                          operation is commenced the most used etch amp I ferrite chloride to this is added small

                          quantity of HCL to accelerate But not critical as lab construction concerned A good

                          etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                          grams of water

                          Agitation

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                          the etchant process The depth of liquid must be sufficient to completely cover laminate the

                          laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                          gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                          temperature and thickness of copper foil

                          Finishing Off

                          When all unwanted copper is dissolved from areas between conductor board should

                          be taken from an etchant amp washed in water The resist must be removed using proper

                          solvent After this the copper surface must be polished with any kind of cleaner It should be

                          seen that there is no slight incomplete etching between the conducting parts of the PCB The

                          PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                          This process is called Tinning This process of coating involve track with soldier

                          Advantage of tinning the effect of environment of conductors then PCB is drilled

                          ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                          Assembling On PCB

                          After the holes are drilled the component have to be assembled on PCB before

                          assembling the components it is necessary to clean soldering iron in order to get easy amp

                          accurate soldering Removing impurity particles that are gathered on iron bit due to

                          repetitive use cleans soldering iron

                          CHAPTER 9

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          SOLDERING

                          TECHNIQUE

                          Technique for good soldering

                          91 SOLDERING TECHNIQUE

                          For soldering of any joints first the terminal to be soldered are cleaned to remove

                          oxide film or dirt on it If required flux is applied on the points to be soldered

                          Now the joint to be soldered is heated with the help of soldering iron Heat

                          applied should be such that when solder wire is touched to joint it must melt

                          quickly

                          The joint and the soldering iron is held such that molten solder should flow

                          smoothly over the joint

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          When joint is completely covered with molten solder the soldering iron is re-

                          moved

                          The joint is allowed to cool without any movement

                          The bright shining solder indicates good soldering

                          In case of dry solder joint a air gap remains in between the solder material and

                          the joint It means that soldering is improper This is removed and again solder-

                          ing is done

                          Thus this way all the components are soldered on P C B

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 10

                          PCB LAYOUTS

                          Schematic diagram

                          Bottom and top layout

                          101 POWER SUPPLY CARD

                          1011 SCHIMETIC DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1012 LEGEND MARKING

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                          Fig1011 Schematic diagram of power supply card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1013TOP LAYER

                          1014 BOTTOM LAYER

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                          Fig1013 Top layer of power supply

                          card

                          Fig1014 Schematic diagram of power supply card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          102 BATTERY CHARGER CARD

                          1021 SCHEMATIC DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                          Fig1021 Schematic diagram of battery charger card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          103 RELAY CARD

                          1031 SCHIMETIC DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                          Fig1031 Schematic diagram of Relay card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1032 RELAY CARD LEGEND MARKING

                          1033 TOP LAYER

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                          Fig1032 Legend marking of Relay card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1034 BOTTOM LAYER

                          104 MICROCONTROLER CARD

                          1041 SCHIMETIC DIAGRAM

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                          Fig1034 Bottom layer of Relay card

                          Fig1041 Schematic diagram of microcontroller card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1042 ALL LAYERS

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                          Fig1042 All layer of microcontroller card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 11

                          INTRODUCTION

                          OF SOFTWARE

                          Keil (microVision 2)

                          Eagle (Easily Applicable Graphical Layout Editor)

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          111 Keil (microVision 2)

                          1111 Introduction to C51 Cross Compiler

                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                          generates object code that matches the efficiency and speed of assembly programming

                          Using a high-level language like C has many advantages over assembly language

                          programming

                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                          the memory structure of the 8051 CPU is desirable (but not necessary)

                          Details like register allocation and addressing of the various memory types and data

                          types is managed by the compiler

                          Programs get a formal structure (which is imposed by the C programming language) and

                          can be divided into separate functions This contributes to source code reusability as

                          well as better overall application structure

                          The ability to combine variable selection with specific operations improves program

                          readability

                          Keywords and operational functions that more nearly resemble the human thought

                          process may be used

                          Programming and program test time is drastically reduced

                          The C run-time library contains many standard routines such as formatted output

                          numeric conversions and floating-point arithmetic

                          Existing program parts can be more easily included into new programs because of

                          modular program construction techniques

                          The language C is a very portable language (based on the ANSI standard) that enjoys

                          wide popular support and is easily obtained for most systems Existing program

                          investments can be quickly adapted to other processors as needed

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1112 Software Development Cycle in Keil

                          When we use the Keil Software tools the

                          project development cycle is roughly the same as

                          it is for any other software development project

                          1 Create a project select the target chip from the

                          device database and configure the tool settings

                          2 Create source files in C or assembly

                          3 Build your application with the project

                          manager

                          4 Correct errors in source files

                          5 Test the linked application A block diagram of

                          the complete 8051 tool set may best illustrate the

                          development cycle

                          112 Eagle (Easily Applicable Graphical Layout Editor)

                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                          1121 Schematic Editor

                          In this one can develop amp design circuits for the required PCB

                          1122 Layout Editor

                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                          Fig 111 Software development in KEIL

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1123 Library Editor

                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                          1124 Auto Router

                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                          the PCB tracks designed

                          1125 Cam Processor

                          This is used to finally print the various layers of the designed PCB viz Top Layer

                          Bottom Layer Component Layer Masking Layer etc

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                          Start

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 12

                          INTRODUCTION

                          OF

                          PROGRAMMING

                          Flowchart of programming

                          Program code

                          121 Flowchart

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                          2

                          flag9==1

                          flag9=1

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                          flag11==1

                          flag11=1 flag11=0 flag4=0

                          REady_LED4=0

                          Sw2_op (P01) ==0

                          My delay (10)

                          3 3

                          flag2=1 disp2=1 k2=0

                          3

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                          4

                          flag11==1

                          flag11=0 flag4=0 REady_LED4=0

                          flag11=1

                          My delay (10)

                          flag3=1 disp3=1 k3=0

                          k1==0||k2==0||k4==0

                          Sw3_op (P02) ==0

                          5

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                          flag5==1

                          5

                          flag11==1

                          flag7=1

                          flag7==1

                          flag7=0 flag2=0 REady_LED2=0

                          6

                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                          flag11=0 flag4=0 REady_LED4=0

                          flag11=1

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                          6

                          My delay (10)

                          flag4=1 disp4=1 k4=0

                          k1==0||k2==0||k3==0 flag5==1

                          7

                          Sw4_op (P03) ==0

                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                          7

                          flag7==1

                          flag9==1

                          flag7=1

                          flag7=0 flag2=0 REady_LED2=0

                          flag9=0 flag3=0 REady_LED3=0

                          flag9=1

                          Sw5_op A(P04) ==0

                          My delay (10)

                          8

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                          9

                          flag2==1

                          flag3==1

                          8

                          flag1==1

                          flag4==1 flag5=1 disp5=1

                          flag9=1 disp5=1

                          flag7=1 disp5=1

                          flag11=1 disp5=1

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                          Sw6_op (P05) ==0

                          My delay (10)

                          flag2==1 ampamp flag7==1

                          flag3==1 ampamp flag9==1 9

                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                          flag8=1 disp6=1

                          10

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                          10

                          flag4==1 ampamp flag11==1

                          flag10=1 disp6=1

                          flag12=1 disp6=1

                          flag8==1

                          flag10==1

                          11

                          flag6==1

                          i++

                          l++

                          j++

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                          flag12==1

                          M++

                          11

                          Stop

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          122 Program

                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                          define buzzerP2_0 buzzer indication

                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                          sbit sw5_op=P0^4 input switch5 for coin

                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                          output Led for indication

                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                          function prototype declaration

                          void my_delay(unsigned int value) DELAY FUCTION

                          void init_timer() timer 0 initialization function

                          variable declaration

                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          start of main programme

                          void main()

                          init_timer() call it timer initialization function

                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                          start of while loop

                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                          condition for switch1

                          if(flag1==1) check swich1 pressed if(disp1==1 )

                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                          if(iltk) loop will repeat for desired time of charging

                          if(igt=1000)

                          buzzer=1 turn on buzzer if (ii==20)

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          REady_LED1=1 turn on ready indication of led1

                          else if(ii==40)

                          REady_LED1=0ii=0

                          elseREady_LED1=0

                          START_LED1=1

                          else

                          START_LED1=0

                          k1=1 buzzer=0

                          REady_LED1=0 flag1=0

                          flag5=0flag6=0

                          condition for switch2

                          if(flag2==1) check swich2 pressed if(disp2==1)

                          REady_LED2=1 turn on ready 2 led indication

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          disp2=0

                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                          if(jltk)

                          if(jgt1000) buzzer=1 if(jj==20)

                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                          elseREady_LED2=0

                          START_LED2=1

                          else START_LED2=0

                          REady_LED2=0 k2=1 buzzer=0

                          flag2=0flag7=0flag8=0

                          j=0jj=0

                          condition for switch 3

                          if(flag3==1) check swich3 pressed

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          if(disp3==1 )

                          REady_LED3=1 disp3=0

                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                          if(lltk)

                          if(lgt1000) buzzer=1 if(ll==20)

                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                          elseREady_LED3=0

                          START_LED3=1

                          else START_LED3=0

                          LED2=0 k3=1 buzzer=0

                          REady_LED3=0 flag3=0

                          flag9=0flag10=0

                          l=0ll=0

                          condition for switch 4

                          if(flag4==1) check swich4 pressed if(disp4==1 )

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          REady_LED4=1 disp4=0

                          if(flag11==1) check coin is pressed

                          if(flag12==1) START is pressed

                          if(mltk)

                          if(mgt1000)

                          buzzer=1 if(mm==20)

                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                          elseREady_LED4=0

                          START_LED4=1

                          else START_LED4=0

                          buzzer=0 k4=1

                          REady_LED4=0 flag4=0

                          flag11=0flag12=0

                          m=0mm=0

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          while(1)

                          end of main programme

                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                          whenever specific time the interrupt will generate control will go in following function

                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if(sw1_op==0 ) ready switch flag for system1

                          my_delay(10) CALL DELAY FUNCTION

                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                          if(flag7==1) SET THE FLAG

                          flag7=1

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                          flag9=1

                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                          flag11=1

                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if(sw2_op==0 ) fready switch flag for system2

                          my_delay (10)

                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                          if(flag5==1)

                          flag5=1

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                          flag9=1

                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                          flag11=1

                          elseflag11=0flag4=0REady_LED4=0

                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                          if(flag7==1)

                          flag7=1

                          else

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                          flag5=1

                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                          flag11=1

                          elseflag11=0flag4=0REady_LED4=0

                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                          if(flag7==1)

                          flag7=1

                          elseflag7=0

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          flag2=0REady_LED2=0 if(flag5==1)

                          flag5=1

                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                          flag9=1

                          elseflag9=0flag3=0REady_LED3=0

                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                          if(flag6==1)

                          i++ if (igt1000) ii++

                          if (flag8==1)

                          j++ if(jgt1000) jj++

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          if (flag10==1)

                          l++ if (lgt1000) ll++

                          if (flag12==1)

                          m++ if (mgt1000) mm++

                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 13

                          TROUBLE SHOOT

                          Troubleshoot

                          131 TROUBLE SHOOT

                          A newly assembled circuit does not work may be due to -

                          Faulty components

                          Improper soldering

                          Wrong connections

                          Also any stop in working after some period may be due to -

                          Component failure

                          Supply failure

                          Damaging of PCB

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Fault finding is very essential if you want the circuit to operate properly

                          If a newly assembled circuit is not working properly check all the components and

                          circuit connections according to the diagram The circuit may not be working due to wrong

                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                          proper soldering

                          If faults are not observed during physical observations one should proceed for Hot

                          test ie Voltage measurement at different points for example at Input terminal etc

                          Resistance measurement is also done which is known as Dry test

                          During this project work some green LEDs was not glow then we checked it

                          continuity and replace it

                          Also relay was not properly worked therefore we replaced it Some ICs was get

                          heated after starting the project It happens because of some soldering points are shorted

                          during soldering PCB We solved that problem

                          CHAPTER 14

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          ADVANTAGES OF

                          THE PROJECT

                          Advantages

                          141 ADVANTAGES OF THE PROJECT

                          Simple and hand efficient Microcontroller based system

                          Fast charging capacity

                          Simple to operate

                          Ease of mobility

                          Facilitates connectivity for 90 of cellular phones

                          Less expensive

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Reduced man power

                          Low power consumption

                          It can offer emergency charging for 4sets of handsets synchronously

                          CHAPTER 15

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          DISADVANTAGES

                          OF THE PROJECT

                          Disadvantages

                          151 DISADVANTAGES OF THE PROJECT

                          It requires mains supply to work project

                          Due to limited charging channels till now there may be a possibility that

                          mobile phones of few brands cannot be connected for charging For this

                          purpose we have to use separate connectors for that specific brand differently

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                          min

                          It does not have battery backup therefore it cannot be portable

                          CHAPTER 16

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          APPLICATIONS OF

                          THE PROJECT

                          Application

                          161 APPLICATIONS OF THE PROJECT

                          The coin based mobile phone charger is very useful to public for using coin to

                          charge for the mobile phone in any places

                          It is used for emergency charging purposes

                          It can be installed in malls railway stations bus stops and other public

                          places

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          The charger offers a unique revenue opportunity for a vast range of

                          businesses - from airports to pubs from universities to health clubs virtually

                          any location where there is a high footfall creating a large number of

                          potential users

                          It can be installed in offices and collages for pay charging facility

                          CHAPTER 17

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          FUTURE

                          DEVELOPMENT OF

                          THE PROJECT

                          FUTURE DEVELOPMENT OF THE PROJECT

                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                          This project is very useful to people who are using mobile phone without charging

                          condition in public places

                          It will use with a stereo advertisement carrier that can display video advertisement

                          It will provide battery backup for make it portable

                          It will also provide SMS system in future

                          We can also increase the charging time by editing software of the project

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 18

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          COST ANALYSIS

                          OF THE PROJECT

                          COST ANALYSIS OF THE PROJECT

                          181 COST ANALYSIS OF THE PROJECT

                          1811 Component list for power supply card

                          Footprint Quantity Designators Rate

                          Resistor

                          22K 1 R2 1

                          1K 1 R1 1

                          Capacitor

                          1000uf25V 1 C5 10

                          2200uf25V 1 C1 10

                          022uf 2 C6 C2 1

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                          Table 1811 Component list for power supply card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          01uf 2 C4 C3 1

                          IC

                          BRIDGE W10 2 BR2 BR1 10

                          L7812CV (TO-220) 1 U2 8

                          L7805CV (TO-220) 1 U1 8

                          Connector

                          CON PHO 2PIN 2 J3 J2 16

                          CON PHO 3PIN 1 J1 12

                          LED3mm red 2 L1 L2 15

                          Heat sink (TO-220) 2 16

                          Total 955

                          1812 Component list for battery charger card

                          Footprint Quantity Rate

                          Capacitor

                          2200uf25V 1 1000

                          022uf 4 100

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          01uf 4 100

                          IC

                          BRIDGE W10 1 500

                          L7805CV (TO-220) 4 3200

                          Connector

                          CON PHO 2PIN 1 800

                          Relimate 2 pin 1 400

                          relimate 3 pin 4 2000

                          Heat sink (TO-220) 4 1200

                          TOTAL 9300

                          1813 Component list for Relay card

                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                          Table 1812Component list for battery charger card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                          Total 18900

                          1814Component list for controller card

                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                          Table 1813Component list for relay card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                          total 27000

                          1815 Miscellaneous material

                          Material Quantity Rate

                          electronic item

                          Transformer

                          TXR1 0-9-15 1 20000

                          0-9 1A

                          0-15 100mA

                          TXR2 0-9 1 16500

                          0-9 1A

                          Proximity switch 1 20000

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                          Table 1814Component list for microcontroller card

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Red push bottom 4 4000

                          Green push button 1 1000

                          Red led 5mm 4 800

                          Green led 5mm 4 800

                          Led holder 8 1600

                          Copper clad 2 4000

                          3 core cable 1 meter 1500

                          3 pin plug 1 3000

                          2 pin relimate wire 19 9000

                          3 pin relimate wire 5 3750

                          4 pin relimate wire 2 2000

                          mechanical items

                          Enclosure 1 25000

                          Acrylic sheet 2 X 1 30000

                          12mm cable gland 1 1000

                          Screw 3mm 33 2000

                          Screw 35mm 6 2400

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          10 mm spacers 100 1500

                          10mm insert to stud 50 10000

                          cable tie 2500

                          Total 162350

                          CHAPTER 19

                          APPENDIX

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                          Table 1815Component list for miscellaneous material

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          APPENDIX

                          191 APPENDIX

                          1911 78xx IC datasheet

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1912 W10 datasheet

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1913 4n33 IC datasheet

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                          1914 MAX 232

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1915 ULN2003a IC datasheet

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          1916 89V51RD2 IC datasheet

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 20

                          CONCLUSION

                          CONCLUSION

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          201 CONCLUSION

                          The coin-operated mobile phone charger is already successfully installed in

                          hundreds of locations worldwide providing a unique service to the public and a source of

                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                          installed in any business premises

                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                          from airports to pubs from universities to health clubs virtually any location where there is

                          a high footfall creating a large number of potential users

                          The charger can charge up to 4 different mobile phones simultaneously It will

                          extend low mobile phone talk time provide battery charging

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 21

                          IMAGES OF THE

                          PROJECT

                          Images of the project

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          211 IMAGES OF THE PROJECT

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                          fig211 lsquoCoin operated mobile battery charger

                          Fig212 Circuit arrangement of coin operated mobile battery charger

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Fig 216 Relay driver circuit

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                          Fig 213 Constant voltage battery charger circuit

                          Fig214 Power supply circuit

                          Fig215 Metal detector proximity switch

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Fig217 Microcontroller circuit

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          Fig228 coin operated mobile battery charger project presentation

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          CHAPTER 22

                          BIBILOGRAPHY

                          BIBLIOGRAPHY

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                          221 BIBLIOGRAPHY

                          BOOKS

                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                          INTERNET LINKS

                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                          • CHAPTER 1

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Circuit diagram explanation Working

                            51 POWER SUPPLY CIRCUIT

                            511 CIRCUIT DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 14

                            Fig51 Circuit diagram of the power supply

                            Bridge RectifierTRANSFORMER

                            Filter Voltage regulator Load

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            512 WORKING

                            Transformer

                            A step-down transformer is used to achieve our requirements of the power

                            supply It steps down high voltage ac mains to low voltage ac mains

                            Bridge Rectifier

                            A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                            full wave rectification This is a widely used configuration both with individual

                            diodes wired and with single component bridges where the diode bridge is wired

                            internally It also converts ac to dc but the dc output is varying

                            One advantage of a bridge rectifier over a conventional full-wave rectifier is

                            that with a given transformer the bridge rectifier produces a voltage output that is

                            nearly twice that of the conventional full-wave circuit

                            Filter

                            The output of the rectifier is a pulsating dc wave We need a constant dc

                            output To do this we need to filter out the oscillation from the pulsating dc wave

                            This is obtained with a diode capacitor combination

                            Voltage Regulator

                            A voltage regulator is used for voltage regulation in the circuit This provides

                            a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                            dc output to fixed voltages

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                            Fig 52 Block diagram of the power supply

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Load

                            The load can be anything which wants to switch ON by using power supply

                            513 CIRCUIT DIAGRAM EXPLANATION

                            Regulated power supplies are commonly used in engineering projects Power

                            supply is food of any circuit

                            +5V SUPPLY UNIT

                            +5V supply is obtained from the +5V supply unit for microcontroller and

                            digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                            transformer having a capacity of 500mA

                            Since the input voltage to the regulator IC should be more than its output

                            voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                            of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                            smooth DC supply The rating of the chosen capacitor filter is 1000microF

                            The regulated DC voltage is obtained by using a regulator IC 7805 In the

                            case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                            Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                            output of regulator IC to eliminate the voltage oscillations at the output due to the large

                            voltage oscillations at the input of the regulator

                            +12V SUPPLY UNIT

                            The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                            arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                            step down transformer having a capacity of 1A and the center tap of the transformer is

                            grounded This low voltage is rectified with the help off bridge rectifier

                            Since the input voltage to the regulator IC should be more than its output

                            voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                            the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                            filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                            For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                            7912 is used

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                            the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                            connected at the output as shown in figure to eliminate the voltage oscillations at the

                            output due to the large voltage oscillations at the input of the regulator

                            52 CONSTANT VOLTAGE CHARGER

                            521 CIRCUIT DIAGRAM

                            Fig 53 Circuit diagram of the battery charger

                            522 CIRCUIT DIAGRAM EXPLANATION

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Constant-voltage (often called constant-potential) chargers maintain nearly the same

                            voltage input to the battery throughout the charging process regardless of the batterys state

                            of charge Constant-voltage chargers provide a high initial current to the battery because of

                            the greater potential difference between the battery and charger

                            A constant-voltage charger may return as much as 70 of the previous discharge in

                            the first 30 minutes This proves useful in many battery applications involving multiple

                            discharge scenarios As the battery charges its voltage increases quickly This reduces the

                            potential that has been driving the current with a corresponding rapid decrease in charge

                            current as depicted in the illustration below As a result even though the battery reaches

                            partial charge quickly obtaining a full charge requires prolonged charging

                            Given this behavior constant-voltage chargers are frequently found in applications

                            that normally allow extended charging periods to attain full charge Constant-voltage

                            chargers should not be used where there is frequent cycling of the battery Repeated

                            discharges without returning the cell to its full charge will eventually decrease the battery

                            capacity and may damage individual cells

                            Fig 54An Illustration graph of the charging function of constant battery charger

                            Constant-voltage chargers are most often used in two very different modes as a fast

                            charger to restore a high percentage of charge in a short time or as a float charger to

                            minimize the effects of overcharge on batteries having infrequent discharges

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            53 RELAY DRIVER CIRCUIT

                            531 CIRCUIT DIAGRAM

                            532 CIRCUIT DIAGRAM EXPLANATION

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                            Fig 55 Relay driver circuit

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Input from the controller is connected to the relay card through connector J1 which

                            carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                            pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                            These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                            relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                            series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                            and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                            relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                            NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                            3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                            RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                            is used to connect power supply to relay card

                            533 WORKING

                            While taking Relay1 (RL1) into consideration we will discuss the working of relay

                            card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                            of the IC are in cut off region which causes an open circuit so there is no current flow

                            flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                            applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                            completes the path ie provide ground to the relay coil so the current flows through the

                            LED activating the relay

                            As the current flows through the relay coil it gets energized and switch over the

                            contacts ie common and normally open contact get connected and provide a path to flow

                            current from J11 ie charger into the load connected at J4 hence the cell phone charging

                            process starts The same above process is applies for all relays If LED is fused or

                            damaged the path will be open and relay will not be energized and if relay is damaged the

                            led will not be illuminated So the LED here is used as a FAULT indicator and a

                            CHARGING ON indicator

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            54 MICROCONTORLLER CIRCUIT

                            541 CIRCUIT DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            542 CIRCUIT DIAGRAM EXPLANATION

                            CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                            the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                            port P04 through J4 and START switch is connected to port P05 through SW5

                            Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                            P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                            Output for relay card is taken on port P14 to P17

                            Components C1 R1 and push button S1 forms reset circuit which provides a power

                            on reset for the micro controller and even provide manual reset Crystal XL1 is a

                            110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                            22pf capacitor used as loading capacitor for crystal

                            Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                            RN2 resistance network

                            IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                            the proximity switch and microcontroller and convert its output readable to microcontroller

                            IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                            communication between PC and a microcontroller through connector J3

                            Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                            communication process

                            Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                            power supply connection

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            543 PORT ASSIGNMENTS FOR 89V51RD2FN

                            P00 = switch1 for channel 1

                            P01 = switch2 for channel 2

                            P02 = switch3 for channel 3

                            P03 = switch4 for channel 4

                            P04 = switch5 for coin input sensor (proximity switch)

                            P05 = switch6 for start charging

                            P10 = channel 1 red LED1 (ready system)

                            P11 = channel 2 red LED2 (ready system2)

                            P12 = channel 3 red LED3 (ready system3)

                            P13 = channel 4 red LED4 (ready system4)

                            P14 = channel 1 relay (start system1)

                            P15 = channel 2 relay (start system2)

                            P16 = channel 3 relay (start system3)

                            P17 = channel 4 relay (start system4)

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 6

                            LIST OF THE

                            COMPONENTS

                            List of the components

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            61 LIST OF THE COMPONETS

                            RESISTORS

                            CAPACITORS

                            LIGHT EMITING DIODES (LEDS)- Green Red

                            RELAYrsquoS-

                            TRANSFORMERS

                            RECTIFIER BRIDGES (W 10)

                            OSCILLATOR

                            SWITCHES- Push switches

                            DARLINGTON PAIR IC (ULN2003a)

                            SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                            SERIAL COMMUNICATION DRIVER IC (MAX 232)

                            OPTOCOUPLER IC (4N33)

                            MICROCONTROLLER IC (89V51 RD2)

                            RELIMATE CONNECTOR- 2 pin amp 4 pin

                            RS-232 PORT CONNECTOR

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 7

                            INTRODUCTION

                            OF COMPONENTS

                            Working of components

                            Features or Uses of components

                            Testing of components

                            71 RESISTOR

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            711 WORKING

                            Resistors limit current Resistors are considered to be the most used and the most

                            important component of all the electronic circuits Resistors resist the flow of electrical

                            current The higher the value of resistance (measured in ohms)

                            the lower the current will be

                            712 TESTING

                            Read the indicated color code value then select the OHM-scale within but not way

                            below the indicated value A resistor is good if its resistance is close to the indicated

                            Tolerance should be considered with the ohmmeter reading While no resistance reading at

                            all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                            ohmmeter scale settings resistor is shorted

                            713 SPECIFICATIONS

                            To completely specify a resistors characteristics requires knowledge of the following

                            parameters-

                            bull Value

                            bull Tolerance

                            bull Temperature Coefficient

                            bull Power Rating

                            The specification of a resistor may be marked on its surface using either of two

                            systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                            the second more recent system uses a combination of alpha-numeric characters

                            7 2 CAPACITOR

                            721 WORKING

                            When DC voltage is applied to the capacitor an electric charge is stored on each

                            electrode While the capacitor is charging up current flows The current will stop flowing

                            when the capacitor has fully charged Capacitors find use

                            in circuits for a variety of purposes They are used in

                            time delay generation RC circuits In power supplies for filtering and power supply

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            decoupling as blocking capacitors for power factor correction and motor starting in LC

                            tank circuits and so on

                            722 TESTING

                            To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                            negative probe to the capacitor positive terminal the positive probe to the negative terminal

                            A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                            and moves back again to infinite resistance position A defective indication for an

                            electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                            which is an indication that the capacitor is shorted

                            73 LIGHT EMITING DIODE (LED)

                            731 WORKING

                            LEDs are special diodes that emit light when

                            connected in a circuit They are frequently used as pilot lights in electronic appliances to

                            indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                            the heart of an LED the semi-conductor chip

                            In our project Green LED are used here for mainly two purpose

                            a Charging ON indication (when ON)

                            b Channel fault indication (always OFF)

                            732 TESTING

                            The good and working LED will then light up or glow a busted LED will not LEDs

                            must have a resistor in series to limit the current to a safe value for quick testing purposes a

                            1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                            directly connected to a battery or power supply It will be destroyed the LED

                            733 FEATURES

                            Single color

                            High bright output

                            Low power consumption

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            High reliability and long life

                            734 Descriptions

                            Dice material GaInN

                            Emitting Color Super Bright White

                            Device Outlineφ5mm Round Type

                            Lens Type Water Clear

                            74 RELAY

                            741 WORKING

                            A relay is an electrically operated switch Current

                            flowing through the coil of the relay creates a magnetic field

                            which attracts a lever and changes the switch contacts The coil

                            current can be on or off so relays have two switch positions and

                            most have double throw (changeover) switch contacts

                            Relays are like remote control switches and are used in

                            many applications because of their relative simplicity long life

                            and proven high reliability

                            742 USES

                            The main operation of a relay comes in places where only a low-power signal can be

                            used to control a circuit

                            It is also used in places where only one signal can be used to control a lot of circuits

                            The application of relays started during the invention of telephones They played an

                            important role in switching calls in telephone exchanges They were also used in

                            long distance telegraphy They were used to switch the signal coming from one

                            source to another destination

                            743 TESTING

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            A relay will usually have a coil pole terminal and a set of

                            contacts The set of contacts that are open when the relay is not

                            energized are called normally open (NO) contacts and the set of

                            contacts that are closed when the relay is not energized are called

                            normally closed (NC) contacts The following steps can be used to perform the testing of

                            the relay using a multimeter

                            Keep the multimeter in the continuity check mode

                            Check for continuity between the NC contacts and pole

                            Check for discontinuity between NO contacts and the pole

                            Now energies the relay using the rated voltage For example use a 9V battery for

                            energizing a 9V relay The relay will engage with clicking sound

                            Now check for continuity between NO contacts and pole

                            Also check for discontinuity between NC contacts and pole

                            As a final test measure the resistance of the relay coil using a multimeter and check

                            whether it is matching to the value stated by the manufacturer

                            If all the above tests are positive we can conclude that the relay is healthy

                            75 TRANSFORMER

                            751 WORKING

                            A transformer is a device that transfers electrical energy

                            from one circuit to another through inductively coupled

                            electrical conductors A changing current in the first circuit (the

                            primary) creates a changing magnetic field

                            This changing magnetic field induces a changing voltage in the second circuit (the

                            secondary) This effect is called mutual induction

                            If a load is connected to the secondary circuit electric charge will flow in the

                            secondary winding of the transformer and transfer energy from the primary circuit to the

                            load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                            of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                            number of primary turns

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            By appropriate selection of the numbers of turns a transformer thus allows an

                            alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                            making it less

                            752 TESTING

                            1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                            scale and then adjusting the knob to verify its reading is an easy step to the

                            reading of the ohm

                            2 To check the resistance of the coil unplug or unsolder the leads of the

                            transformer from its circuit and measure the resistance of each coil

                            3 The next step is to test each coil for shorts to other coils

                            76 RECTIFIER BRIDGE (W 10)

                            761 WORKING

                            A diode bridge rectifier is a device for converting AC or

                            alternating current electricity into DC or direct current AC

                            electricity goes from positive to negative constantly whereas DC

                            always flows in the same direction

                            AC electricity is more efficient to transmit and easier to

                            convert into different voltages However most appliances need DC current to run A diode

                            bridge rectifier is the most common type of power supply used to provide this current In

                            our project W10 is a bridge rectifier which provides on single semiconductor chip

                            77 OSCILLATOR

                            771 Working

                            An oscillator puts out an endless series of pulses The output

                            constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            all digital circuits have some type of oscillator This stream of output pulses is often

                            called a clock One of the most important features of any oscillator is its frequency stability

                            or in other words its ability to provide a constant frequency output under varying load

                            conditions Some of the factors that affect the frequency stability of an oscillator include

                            temperature variations in the load and changes in the DC power supply Frequency stability

                            of the output signal can be improved by the proper selection of the components used for the

                            resonant feedback circuit including the amplifier but there is a limit to the stability that can

                            be obtained from normal LC and RC tank circuits

                            In our project instead of 12MHz crystal 110592MHz is used because it can be

                            divided to give you exact clock rates for most of the common baud rates for the UART

                            especially for the higher speeds (9600 19200) These crystals are readily available and

                            commonly used

                            78 SWITCH

                            781 WORKING

                            The most familiar form of switch is a manually operated

                            electromechanical device with one or more sets of electrical contacts

                            Each set of contacts can be in one of two states either closed meaning

                            the contacts are touching and electricity can flow between them or

                            open meaning the contacts are separated and the switch is non

                            conducting The mechanism actuating the transition between these two

                            states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                            momentary (push-for on or push-for off) type

                            782 USES

                            In electronics a switch is an electrical component that can break an electrical

                            circuit interrupting the current or diverting it from one conductor to another

                            783 TESTING

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            When the switch is ON it looks and acts like a wire When the switch is OFF there is

                            no connection Switch can tested by using multimeter in continuity range

                            79 DARLINGTON PAIR IC (ULN2003a)

                            791 WORKING

                            The Darlington transistor (often called a Darlington pair) is a

                            compound structure consisting of two bipolar transistors (either

                            integrated or separated devices) connected in such a way that the

                            current amplified by the first transistor is amplified further by the

                            second one This configuration gives a much higher current gain than

                            each transistor taken separately and in the case of integrated devices

                            can take less space than two individual transistors because they can

                            use a shared collector

                            Integrated Darlington pairs come packaged singly in

                            transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                            The Darlington transistor array used is ULN2003 Applications include relay

                            drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                            drivers and logic buffers Each input of this device has a zener diode and resistor in series

                            to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                            for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                            792 FEATURES

                            The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                            transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                            with common-cathode clamp diodes for switching inductive loads The collector-current

                            rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                            higher current capability

                            710 SERIES VOLTAGE REGULATER IC (78XX)

                            7101 WORKING

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Voltage Regulator (regulator) usually having three legs converts varying input

                            voltage and produces a constant regulated output voltage They are available in a variety of

                            outputs

                            The most common part numbers start with the numbers 78 or 79 and finish with two

                            digits indicating the output voltage The number 78 represents positive voltage and 79

                            negative one The 78XX series of voltage regulators are designed for positive input

                            The LM78XX series typically has the ability to drive current up to 1A For

                            application requirements up to 150mA 78LXX can be used As mentioned above the

                            component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                            an output leg with the regulators voltage

                            As a general rule the input voltage should be limited to 2 to 3 volts above the output

                            voltage The LM78XX series can handle up to 36 volts input be advised that the power

                            difference between the input and output appears as heat If the input voltage is unnecessarily

                            high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                            sinking the regulator will shut down

                            711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                            7111 WORKING

                            The MAX-232 It includes a Charge Pump which generates

                            +10V and -10V from a single 5v supply

                            This IC also includes two receivers and two transmitters in

                            the same package This is handy in many cases when we only want to

                            use the Transmit and Receive data Lines We dont need to use two chips one for the

                            receive line and one for the transmit There are also many variations of these devices The

                            large value of capacitors are not only bulky but also expensive Therefore other devices are

                            available which use smaller capacitors and even some with inbuilt capacitors However the

                            MAX-232 is the most common and thus we will use this RS-232 Level Converter

                            Dual Charge-Pump Voltage Converter

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                            V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                            output

                            712 OPTOCOUPLER IC (4N33)

                            7121 WORKING

                            In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                            photoMOS) is a device that uses a short optical transmission path to transfer a signal

                            between elements of a circuit typically a transmitter and a receiver while keeping them

                            electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                            back to an electrical signal electrical contact along the path is broken

                            Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                            essentially a combination of two distinct devices an optical transmitter typically a gallium

                            arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                            light-triggered diac The two are separated by a transparent barrier which blocks any

                            electrical current flow between the two but does allow the passage of light

                            The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                            silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                            of isolation between driving and load circuits These Optocouplers can be used to replace

                            reed and mercury relays with advantages of long life high speed switching and elimination

                            of magnetic field

                            713 MICROCONTROLLER IC (89V51 RD 2 )

                            713 WORKING

                            The P89V51RD2 is an 80C51 microcontroller with 64

                            kB Flash and 1024 bytes of data RAM

                            A key feature of the P89V51RD2 is its X2 mode option

                            The design engineer can choose to run the application with the conventional 80C51 clock

                            rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            achieve twice the throughput at the same clock frequency Another way to benefit from this

                            feature is to keep the same performance by reducing the clock frequency by half thus

                            dramatically reducing the EMI

                            The Flash program memory supports both parallel programming and in serial In-

                            System Programming (ISP) Parallel programming mode offers gang-programming at high

                            speed reducing programming costs and time to market ISP allows a device to be

                            reprogrammed in the end product under software control The capability to fieldupdate the

                            application firmware makes a wide range of applications possible The P89V51RD2 is also

                            In-Application Programmable (IAP) allowing the Flash program memory to be

                            reconfigured even while the application is running

                            714 RELIMATE CONNECTOR

                            7141 WORKING

                            These are wire to board type connectors used to facilitate

                            proper and firm electrical connection between the relay card and

                            microcontroller card

                            The connector has following specifications

                            No of Ways 2-20

                            Voltage Rating 250V AC DC

                            Current Rating 3A AC DC

                            Contact Resistance 20mW max

                            Insulation Resistance 1000MW min

                            Dielectric Withstanding 1000V ACminute

                            Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                            The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                            connector is it provides a fast and easy connection and disconnection it also avoids polarity

                            conflicts

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            715 RS-232 PORT CONNECTOR

                            7151 WORKING

                            Almost all digital devices which we use require either TTL

                            or CMOS logic levels Therefore the first step to connecting a

                            device to the RS-232 port is to transform the RS-232 levels back

                            into 0 and 5 Volts This is done by RS-232 Level Converters

                            Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                            Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                            The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                            problem in many instances where only a single supply of +5V is present

                            CHAPTER 8

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            IMPLIMENTATION

                            OF THE PCB

                            Components layout designing

                            Developing or Etching the PCB

                            Other operations like Drilling Cutting Tinning

                            81 IMPLIMENTATION OF THE PCB

                            A proper PCB ensure that various circuit components are interconnected as per the

                            circuit diagram once they have been placed on the PCB in their proper positions and

                            subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                            base material to which is permanently attached a flat metallic network of conducting path

                            whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                            for this project is single one

                            The basic material used may be resin coated paper fiber glass ceramic and the flat

                            board configuration however is most widely used and it may be of the nature of the single

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                            which ensures adequate and permanent low resistance coupling

                            811 BOARD DESIGN

                            PCB designed is the most important and requires great care during work In this case

                            great care must be taken while tracing the circuit or layout on the board Because once PCB

                            is designed it is virtually impossible to alter it While designing a circuit designer should

                            take care to avoid crossing of conducting path (tracks) as possible Crossover are

                            unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                            also help to solve this problem when circuit is complicated

                            812 THE MASTER DIAGRAM

                            The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                            which is commonly made twice as the finished circuit since this makes the working on that

                            much easier especially when circuit is complicated photography eventually reduces the

                            size of diagram to that of the circuit before proceeding we must know some rules regarding

                            the designing -

                            a The space between the conductors must be strictly controlled to avoid the possibility

                            of electrical discharges or unwanted capacitance The amount by which the mater

                            diagram is to reduce in size is thus a critical deign feature

                            b The conductor must be wider in those part of the circuits that are going to handle

                            large current must be handle without undue temperature of conductors

                            c The minimum width of copper should not generally be less than about 15mmThis

                            is related to mechanical strength rather than electrical properties and it also ensure

                            that strips remains securely bounded to the base material

                            d The points where the component holes for component lead wire occurs must be sited

                            to suit the dimensions of the component and dimensions between lead-out wire so

                            that the components can be situated correctly on finished board The conductor is

                            also main large at the point of holes

                            813 PCB MAKING

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            When the mater diagram probable twice the size of real PCB has been evolved the

                            test major step consists of etching or dissolving the unwanted metal from copper claded

                            board to create a circuit as depicted by master diagram It must be stressed that very

                            accurate checking master is essential at this stage Then the master point is mounted on a

                            special frame on easy facing of a larger camera and with the aid of the very powerful

                            illumination a master diagram is clearly photographed on a glass sensitive plate This is

                            developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                            brought into operation This comprises the camera body mounted so that sideways after

                            each exposure In this way number of copies of the original master diagram is set out

                            exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                            In case of simple and need of number of less PCB economic and advisable to use the

                            following lab method of PCB making

                            Planning The Circuit

                            It is not a particular difficult There are several important factors that need not be

                            taken into account if the finished device is to work properly we must consider gain factor

                            and ensure that the input and output parts are sufficiently well isolated to avoid the

                            possibility We must also ensure that conductors and components carrying high frequency

                            current are well separated from the part of the circuit We are also to make sure that all

                            components need to return to earth are properly connected and that possibility of common

                            impedance arising earth returned

                            Circuit is totally eliminated by making all earth as substantial possible consistent

                            with nature of design Other factors that have to successfully studied include availability of

                            adequate return points on board and itrsquos mounting from accessibility of switch connection

                            made for mechanical fixing ventilation effect of vibration

                            Cleaning The Board

                            The copper side of the board must be thoroughly cleaned before circuit plan is

                            transferred to it This is important because even slightest trace of graze (from figure of

                            instance) will impure the etching process and when the circuit plan has been neatly

                            transferred to copper in this manner the board is held under running tap and the allowed to

                            dry before resist is applied

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Transforming the Plan

                            Now once cleaning is done plan has to transfer on copper surface of PCB material

                            A convenient way to do this is simply put the carbon paper between a copper surface of the

                            board and working plan and carefully trace the lines of original plan with a ball pen

                            Resist

                            Resist is nothing more than a substrate that is unaffected by presence etching

                            chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                            clearly worked on clean copper that are to be left in fact as the copper conductor must be

                            covered when resists the leaguer type of paints possess good resist properties but

                            disadvantage of relatively long time taken for drying It is essential to resist through

                            hardening before etching is started Nail polished are better as they quickly and are less

                            difficult to remove

                            To overcome this drying effect and to achieve the sharp edge of the trace on the

                            PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                            short circulating due to paints are completely the avoid etching tapes and pads are available

                            in different sizes

                            Correcting Error

                            When a result has been thoroughly hardened any errors that have been made can

                            usually be corrected by gently scratching away with knife To ensure clear out lines round

                            edges of copper conductors on board the resist must be applied with steady band

                            Etching

                            Next comes etching of unwanted copper amp whether a small single is all that is

                            required as quantity of board to be produce certain precautions must be taken before

                            operation is commenced the most used etch amp I ferrite chloride to this is added small

                            quantity of HCL to accelerate But not critical as lab construction concerned A good

                            etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                            grams of water

                            Agitation

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                            the etchant process The depth of liquid must be sufficient to completely cover laminate the

                            laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                            gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                            temperature and thickness of copper foil

                            Finishing Off

                            When all unwanted copper is dissolved from areas between conductor board should

                            be taken from an etchant amp washed in water The resist must be removed using proper

                            solvent After this the copper surface must be polished with any kind of cleaner It should be

                            seen that there is no slight incomplete etching between the conducting parts of the PCB The

                            PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                            This process is called Tinning This process of coating involve track with soldier

                            Advantage of tinning the effect of environment of conductors then PCB is drilled

                            ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                            Assembling On PCB

                            After the holes are drilled the component have to be assembled on PCB before

                            assembling the components it is necessary to clean soldering iron in order to get easy amp

                            accurate soldering Removing impurity particles that are gathered on iron bit due to

                            repetitive use cleans soldering iron

                            CHAPTER 9

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            SOLDERING

                            TECHNIQUE

                            Technique for good soldering

                            91 SOLDERING TECHNIQUE

                            For soldering of any joints first the terminal to be soldered are cleaned to remove

                            oxide film or dirt on it If required flux is applied on the points to be soldered

                            Now the joint to be soldered is heated with the help of soldering iron Heat

                            applied should be such that when solder wire is touched to joint it must melt

                            quickly

                            The joint and the soldering iron is held such that molten solder should flow

                            smoothly over the joint

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            When joint is completely covered with molten solder the soldering iron is re-

                            moved

                            The joint is allowed to cool without any movement

                            The bright shining solder indicates good soldering

                            In case of dry solder joint a air gap remains in between the solder material and

                            the joint It means that soldering is improper This is removed and again solder-

                            ing is done

                            Thus this way all the components are soldered on P C B

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 10

                            PCB LAYOUTS

                            Schematic diagram

                            Bottom and top layout

                            101 POWER SUPPLY CARD

                            1011 SCHIMETIC DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1012 LEGEND MARKING

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                            Fig1011 Schematic diagram of power supply card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1013TOP LAYER

                            1014 BOTTOM LAYER

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                            Fig1013 Top layer of power supply

                            card

                            Fig1014 Schematic diagram of power supply card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            102 BATTERY CHARGER CARD

                            1021 SCHEMATIC DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                            Fig1021 Schematic diagram of battery charger card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            103 RELAY CARD

                            1031 SCHIMETIC DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                            Fig1031 Schematic diagram of Relay card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1032 RELAY CARD LEGEND MARKING

                            1033 TOP LAYER

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                            Fig1032 Legend marking of Relay card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1034 BOTTOM LAYER

                            104 MICROCONTROLER CARD

                            1041 SCHIMETIC DIAGRAM

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                            Fig1034 Bottom layer of Relay card

                            Fig1041 Schematic diagram of microcontroller card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1042 ALL LAYERS

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                            Fig1042 All layer of microcontroller card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 11

                            INTRODUCTION

                            OF SOFTWARE

                            Keil (microVision 2)

                            Eagle (Easily Applicable Graphical Layout Editor)

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            111 Keil (microVision 2)

                            1111 Introduction to C51 Cross Compiler

                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                            generates object code that matches the efficiency and speed of assembly programming

                            Using a high-level language like C has many advantages over assembly language

                            programming

                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                            the memory structure of the 8051 CPU is desirable (but not necessary)

                            Details like register allocation and addressing of the various memory types and data

                            types is managed by the compiler

                            Programs get a formal structure (which is imposed by the C programming language) and

                            can be divided into separate functions This contributes to source code reusability as

                            well as better overall application structure

                            The ability to combine variable selection with specific operations improves program

                            readability

                            Keywords and operational functions that more nearly resemble the human thought

                            process may be used

                            Programming and program test time is drastically reduced

                            The C run-time library contains many standard routines such as formatted output

                            numeric conversions and floating-point arithmetic

                            Existing program parts can be more easily included into new programs because of

                            modular program construction techniques

                            The language C is a very portable language (based on the ANSI standard) that enjoys

                            wide popular support and is easily obtained for most systems Existing program

                            investments can be quickly adapted to other processors as needed

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1112 Software Development Cycle in Keil

                            When we use the Keil Software tools the

                            project development cycle is roughly the same as

                            it is for any other software development project

                            1 Create a project select the target chip from the

                            device database and configure the tool settings

                            2 Create source files in C or assembly

                            3 Build your application with the project

                            manager

                            4 Correct errors in source files

                            5 Test the linked application A block diagram of

                            the complete 8051 tool set may best illustrate the

                            development cycle

                            112 Eagle (Easily Applicable Graphical Layout Editor)

                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                            1121 Schematic Editor

                            In this one can develop amp design circuits for the required PCB

                            1122 Layout Editor

                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                            Fig 111 Software development in KEIL

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1123 Library Editor

                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                            1124 Auto Router

                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                            the PCB tracks designed

                            1125 Cam Processor

                            This is used to finally print the various layers of the designed PCB viz Top Layer

                            Bottom Layer Component Layer Masking Layer etc

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                            Start

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 12

                            INTRODUCTION

                            OF

                            PROGRAMMING

                            Flowchart of programming

                            Program code

                            121 Flowchart

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                            2

                            flag9==1

                            flag9=1

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                            flag11==1

                            flag11=1 flag11=0 flag4=0

                            REady_LED4=0

                            Sw2_op (P01) ==0

                            My delay (10)

                            3 3

                            flag2=1 disp2=1 k2=0

                            3

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                            4

                            flag11==1

                            flag11=0 flag4=0 REady_LED4=0

                            flag11=1

                            My delay (10)

                            flag3=1 disp3=1 k3=0

                            k1==0||k2==0||k4==0

                            Sw3_op (P02) ==0

                            5

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                            flag5==1

                            5

                            flag11==1

                            flag7=1

                            flag7==1

                            flag7=0 flag2=0 REady_LED2=0

                            6

                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                            flag11=0 flag4=0 REady_LED4=0

                            flag11=1

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                            6

                            My delay (10)

                            flag4=1 disp4=1 k4=0

                            k1==0||k2==0||k3==0 flag5==1

                            7

                            Sw4_op (P03) ==0

                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                            7

                            flag7==1

                            flag9==1

                            flag7=1

                            flag7=0 flag2=0 REady_LED2=0

                            flag9=0 flag3=0 REady_LED3=0

                            flag9=1

                            Sw5_op A(P04) ==0

                            My delay (10)

                            8

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                            9

                            flag2==1

                            flag3==1

                            8

                            flag1==1

                            flag4==1 flag5=1 disp5=1

                            flag9=1 disp5=1

                            flag7=1 disp5=1

                            flag11=1 disp5=1

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                            Sw6_op (P05) ==0

                            My delay (10)

                            flag2==1 ampamp flag7==1

                            flag3==1 ampamp flag9==1 9

                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                            flag8=1 disp6=1

                            10

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                            10

                            flag4==1 ampamp flag11==1

                            flag10=1 disp6=1

                            flag12=1 disp6=1

                            flag8==1

                            flag10==1

                            11

                            flag6==1

                            i++

                            l++

                            j++

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                            flag12==1

                            M++

                            11

                            Stop

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            122 Program

                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                            define buzzerP2_0 buzzer indication

                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                            sbit sw5_op=P0^4 input switch5 for coin

                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                            output Led for indication

                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                            function prototype declaration

                            void my_delay(unsigned int value) DELAY FUCTION

                            void init_timer() timer 0 initialization function

                            variable declaration

                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            start of main programme

                            void main()

                            init_timer() call it timer initialization function

                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                            start of while loop

                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                            condition for switch1

                            if(flag1==1) check swich1 pressed if(disp1==1 )

                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                            if(iltk) loop will repeat for desired time of charging

                            if(igt=1000)

                            buzzer=1 turn on buzzer if (ii==20)

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            REady_LED1=1 turn on ready indication of led1

                            else if(ii==40)

                            REady_LED1=0ii=0

                            elseREady_LED1=0

                            START_LED1=1

                            else

                            START_LED1=0

                            k1=1 buzzer=0

                            REady_LED1=0 flag1=0

                            flag5=0flag6=0

                            condition for switch2

                            if(flag2==1) check swich2 pressed if(disp2==1)

                            REady_LED2=1 turn on ready 2 led indication

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            disp2=0

                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                            if(jltk)

                            if(jgt1000) buzzer=1 if(jj==20)

                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                            elseREady_LED2=0

                            START_LED2=1

                            else START_LED2=0

                            REady_LED2=0 k2=1 buzzer=0

                            flag2=0flag7=0flag8=0

                            j=0jj=0

                            condition for switch 3

                            if(flag3==1) check swich3 pressed

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            if(disp3==1 )

                            REady_LED3=1 disp3=0

                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                            if(lltk)

                            if(lgt1000) buzzer=1 if(ll==20)

                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                            elseREady_LED3=0

                            START_LED3=1

                            else START_LED3=0

                            LED2=0 k3=1 buzzer=0

                            REady_LED3=0 flag3=0

                            flag9=0flag10=0

                            l=0ll=0

                            condition for switch 4

                            if(flag4==1) check swich4 pressed if(disp4==1 )

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            REady_LED4=1 disp4=0

                            if(flag11==1) check coin is pressed

                            if(flag12==1) START is pressed

                            if(mltk)

                            if(mgt1000)

                            buzzer=1 if(mm==20)

                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                            elseREady_LED4=0

                            START_LED4=1

                            else START_LED4=0

                            buzzer=0 k4=1

                            REady_LED4=0 flag4=0

                            flag11=0flag12=0

                            m=0mm=0

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            while(1)

                            end of main programme

                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                            whenever specific time the interrupt will generate control will go in following function

                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if(sw1_op==0 ) ready switch flag for system1

                            my_delay(10) CALL DELAY FUNCTION

                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                            if(flag7==1) SET THE FLAG

                            flag7=1

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                            flag9=1

                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                            flag11=1

                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if(sw2_op==0 ) fready switch flag for system2

                            my_delay (10)

                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                            if(flag5==1)

                            flag5=1

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                            flag9=1

                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                            flag11=1

                            elseflag11=0flag4=0REady_LED4=0

                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                            if(flag7==1)

                            flag7=1

                            else

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                            flag5=1

                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                            flag11=1

                            elseflag11=0flag4=0REady_LED4=0

                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                            if(flag7==1)

                            flag7=1

                            elseflag7=0

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            flag2=0REady_LED2=0 if(flag5==1)

                            flag5=1

                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                            flag9=1

                            elseflag9=0flag3=0REady_LED3=0

                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                            if(flag6==1)

                            i++ if (igt1000) ii++

                            if (flag8==1)

                            j++ if(jgt1000) jj++

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            if (flag10==1)

                            l++ if (lgt1000) ll++

                            if (flag12==1)

                            m++ if (mgt1000) mm++

                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 13

                            TROUBLE SHOOT

                            Troubleshoot

                            131 TROUBLE SHOOT

                            A newly assembled circuit does not work may be due to -

                            Faulty components

                            Improper soldering

                            Wrong connections

                            Also any stop in working after some period may be due to -

                            Component failure

                            Supply failure

                            Damaging of PCB

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Fault finding is very essential if you want the circuit to operate properly

                            If a newly assembled circuit is not working properly check all the components and

                            circuit connections according to the diagram The circuit may not be working due to wrong

                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                            proper soldering

                            If faults are not observed during physical observations one should proceed for Hot

                            test ie Voltage measurement at different points for example at Input terminal etc

                            Resistance measurement is also done which is known as Dry test

                            During this project work some green LEDs was not glow then we checked it

                            continuity and replace it

                            Also relay was not properly worked therefore we replaced it Some ICs was get

                            heated after starting the project It happens because of some soldering points are shorted

                            during soldering PCB We solved that problem

                            CHAPTER 14

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            ADVANTAGES OF

                            THE PROJECT

                            Advantages

                            141 ADVANTAGES OF THE PROJECT

                            Simple and hand efficient Microcontroller based system

                            Fast charging capacity

                            Simple to operate

                            Ease of mobility

                            Facilitates connectivity for 90 of cellular phones

                            Less expensive

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Reduced man power

                            Low power consumption

                            It can offer emergency charging for 4sets of handsets synchronously

                            CHAPTER 15

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            DISADVANTAGES

                            OF THE PROJECT

                            Disadvantages

                            151 DISADVANTAGES OF THE PROJECT

                            It requires mains supply to work project

                            Due to limited charging channels till now there may be a possibility that

                            mobile phones of few brands cannot be connected for charging For this

                            purpose we have to use separate connectors for that specific brand differently

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                            min

                            It does not have battery backup therefore it cannot be portable

                            CHAPTER 16

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            APPLICATIONS OF

                            THE PROJECT

                            Application

                            161 APPLICATIONS OF THE PROJECT

                            The coin based mobile phone charger is very useful to public for using coin to

                            charge for the mobile phone in any places

                            It is used for emergency charging purposes

                            It can be installed in malls railway stations bus stops and other public

                            places

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            The charger offers a unique revenue opportunity for a vast range of

                            businesses - from airports to pubs from universities to health clubs virtually

                            any location where there is a high footfall creating a large number of

                            potential users

                            It can be installed in offices and collages for pay charging facility

                            CHAPTER 17

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            FUTURE

                            DEVELOPMENT OF

                            THE PROJECT

                            FUTURE DEVELOPMENT OF THE PROJECT

                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                            This project is very useful to people who are using mobile phone without charging

                            condition in public places

                            It will use with a stereo advertisement carrier that can display video advertisement

                            It will provide battery backup for make it portable

                            It will also provide SMS system in future

                            We can also increase the charging time by editing software of the project

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 18

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            COST ANALYSIS

                            OF THE PROJECT

                            COST ANALYSIS OF THE PROJECT

                            181 COST ANALYSIS OF THE PROJECT

                            1811 Component list for power supply card

                            Footprint Quantity Designators Rate

                            Resistor

                            22K 1 R2 1

                            1K 1 R1 1

                            Capacitor

                            1000uf25V 1 C5 10

                            2200uf25V 1 C1 10

                            022uf 2 C6 C2 1

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                            Table 1811 Component list for power supply card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            01uf 2 C4 C3 1

                            IC

                            BRIDGE W10 2 BR2 BR1 10

                            L7812CV (TO-220) 1 U2 8

                            L7805CV (TO-220) 1 U1 8

                            Connector

                            CON PHO 2PIN 2 J3 J2 16

                            CON PHO 3PIN 1 J1 12

                            LED3mm red 2 L1 L2 15

                            Heat sink (TO-220) 2 16

                            Total 955

                            1812 Component list for battery charger card

                            Footprint Quantity Rate

                            Capacitor

                            2200uf25V 1 1000

                            022uf 4 100

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            01uf 4 100

                            IC

                            BRIDGE W10 1 500

                            L7805CV (TO-220) 4 3200

                            Connector

                            CON PHO 2PIN 1 800

                            Relimate 2 pin 1 400

                            relimate 3 pin 4 2000

                            Heat sink (TO-220) 4 1200

                            TOTAL 9300

                            1813 Component list for Relay card

                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                            Table 1812Component list for battery charger card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                            Total 18900

                            1814Component list for controller card

                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                            Table 1813Component list for relay card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                            total 27000

                            1815 Miscellaneous material

                            Material Quantity Rate

                            electronic item

                            Transformer

                            TXR1 0-9-15 1 20000

                            0-9 1A

                            0-15 100mA

                            TXR2 0-9 1 16500

                            0-9 1A

                            Proximity switch 1 20000

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                            Table 1814Component list for microcontroller card

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Red push bottom 4 4000

                            Green push button 1 1000

                            Red led 5mm 4 800

                            Green led 5mm 4 800

                            Led holder 8 1600

                            Copper clad 2 4000

                            3 core cable 1 meter 1500

                            3 pin plug 1 3000

                            2 pin relimate wire 19 9000

                            3 pin relimate wire 5 3750

                            4 pin relimate wire 2 2000

                            mechanical items

                            Enclosure 1 25000

                            Acrylic sheet 2 X 1 30000

                            12mm cable gland 1 1000

                            Screw 3mm 33 2000

                            Screw 35mm 6 2400

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            10 mm spacers 100 1500

                            10mm insert to stud 50 10000

                            cable tie 2500

                            Total 162350

                            CHAPTER 19

                            APPENDIX

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                            Table 1815Component list for miscellaneous material

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            APPENDIX

                            191 APPENDIX

                            1911 78xx IC datasheet

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1912 W10 datasheet

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1913 4n33 IC datasheet

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                            1914 MAX 232

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1915 ULN2003a IC datasheet

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            1916 89V51RD2 IC datasheet

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 20

                            CONCLUSION

                            CONCLUSION

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            201 CONCLUSION

                            The coin-operated mobile phone charger is already successfully installed in

                            hundreds of locations worldwide providing a unique service to the public and a source of

                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                            installed in any business premises

                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                            from airports to pubs from universities to health clubs virtually any location where there is

                            a high footfall creating a large number of potential users

                            The charger can charge up to 4 different mobile phones simultaneously It will

                            extend low mobile phone talk time provide battery charging

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 21

                            IMAGES OF THE

                            PROJECT

                            Images of the project

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            211 IMAGES OF THE PROJECT

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                            fig211 lsquoCoin operated mobile battery charger

                            Fig212 Circuit arrangement of coin operated mobile battery charger

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Fig 216 Relay driver circuit

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                            Fig 213 Constant voltage battery charger circuit

                            Fig214 Power supply circuit

                            Fig215 Metal detector proximity switch

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Fig217 Microcontroller circuit

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            Fig228 coin operated mobile battery charger project presentation

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            CHAPTER 22

                            BIBILOGRAPHY

                            BIBLIOGRAPHY

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                            221 BIBLIOGRAPHY

                            BOOKS

                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                            INTERNET LINKS

                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                            • CHAPTER 1

                              Bridge RectifierTRANSFORMER

                              Filter Voltage regulator Load

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              512 WORKING

                              Transformer

                              A step-down transformer is used to achieve our requirements of the power

                              supply It steps down high voltage ac mains to low voltage ac mains

                              Bridge Rectifier

                              A bridge rectifier makes use four diodes in a bridge arrangement to achieve

                              full wave rectification This is a widely used configuration both with individual

                              diodes wired and with single component bridges where the diode bridge is wired

                              internally It also converts ac to dc but the dc output is varying

                              One advantage of a bridge rectifier over a conventional full-wave rectifier is

                              that with a given transformer the bridge rectifier produces a voltage output that is

                              nearly twice that of the conventional full-wave circuit

                              Filter

                              The output of the rectifier is a pulsating dc wave We need a constant dc

                              output To do this we need to filter out the oscillation from the pulsating dc wave

                              This is obtained with a diode capacitor combination

                              Voltage Regulator

                              A voltage regulator is used for voltage regulation in the circuit This provides

                              a protection to the circuits in the case of fluctuations It eliminates ripples by setting

                              dc output to fixed voltages

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 15

                              Fig 52 Block diagram of the power supply

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Load

                              The load can be anything which wants to switch ON by using power supply

                              513 CIRCUIT DIAGRAM EXPLANATION

                              Regulated power supplies are commonly used in engineering projects Power

                              supply is food of any circuit

                              +5V SUPPLY UNIT

                              +5V supply is obtained from the +5V supply unit for microcontroller and

                              digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                              transformer having a capacity of 500mA

                              Since the input voltage to the regulator IC should be more than its output

                              voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                              of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                              smooth DC supply The rating of the chosen capacitor filter is 1000microF

                              The regulated DC voltage is obtained by using a regulator IC 7805 In the

                              case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                              Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                              output of regulator IC to eliminate the voltage oscillations at the output due to the large

                              voltage oscillations at the input of the regulator

                              +12V SUPPLY UNIT

                              The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                              arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                              step down transformer having a capacity of 1A and the center tap of the transformer is

                              grounded This low voltage is rectified with the help off bridge rectifier

                              Since the input voltage to the regulator IC should be more than its output

                              voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                              the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                              filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                              For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                              7912 is used

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                              the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                              connected at the output as shown in figure to eliminate the voltage oscillations at the

                              output due to the large voltage oscillations at the input of the regulator

                              52 CONSTANT VOLTAGE CHARGER

                              521 CIRCUIT DIAGRAM

                              Fig 53 Circuit diagram of the battery charger

                              522 CIRCUIT DIAGRAM EXPLANATION

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Constant-voltage (often called constant-potential) chargers maintain nearly the same

                              voltage input to the battery throughout the charging process regardless of the batterys state

                              of charge Constant-voltage chargers provide a high initial current to the battery because of

                              the greater potential difference between the battery and charger

                              A constant-voltage charger may return as much as 70 of the previous discharge in

                              the first 30 minutes This proves useful in many battery applications involving multiple

                              discharge scenarios As the battery charges its voltage increases quickly This reduces the

                              potential that has been driving the current with a corresponding rapid decrease in charge

                              current as depicted in the illustration below As a result even though the battery reaches

                              partial charge quickly obtaining a full charge requires prolonged charging

                              Given this behavior constant-voltage chargers are frequently found in applications

                              that normally allow extended charging periods to attain full charge Constant-voltage

                              chargers should not be used where there is frequent cycling of the battery Repeated

                              discharges without returning the cell to its full charge will eventually decrease the battery

                              capacity and may damage individual cells

                              Fig 54An Illustration graph of the charging function of constant battery charger

                              Constant-voltage chargers are most often used in two very different modes as a fast

                              charger to restore a high percentage of charge in a short time or as a float charger to

                              minimize the effects of overcharge on batteries having infrequent discharges

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              53 RELAY DRIVER CIRCUIT

                              531 CIRCUIT DIAGRAM

                              532 CIRCUIT DIAGRAM EXPLANATION

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                              Fig 55 Relay driver circuit

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Input from the controller is connected to the relay card through connector J1 which

                              carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                              pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                              These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                              relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                              series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                              and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                              relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                              NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                              3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                              RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                              is used to connect power supply to relay card

                              533 WORKING

                              While taking Relay1 (RL1) into consideration we will discuss the working of relay

                              card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                              of the IC are in cut off region which causes an open circuit so there is no current flow

                              flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                              applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                              completes the path ie provide ground to the relay coil so the current flows through the

                              LED activating the relay

                              As the current flows through the relay coil it gets energized and switch over the

                              contacts ie common and normally open contact get connected and provide a path to flow

                              current from J11 ie charger into the load connected at J4 hence the cell phone charging

                              process starts The same above process is applies for all relays If LED is fused or

                              damaged the path will be open and relay will not be energized and if relay is damaged the

                              led will not be illuminated So the LED here is used as a FAULT indicator and a

                              CHARGING ON indicator

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              54 MICROCONTORLLER CIRCUIT

                              541 CIRCUIT DIAGRAM

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              542 CIRCUIT DIAGRAM EXPLANATION

                              CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                              the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                              port P04 through J4 and START switch is connected to port P05 through SW5

                              Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                              P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                              Output for relay card is taken on port P14 to P17

                              Components C1 R1 and push button S1 forms reset circuit which provides a power

                              on reset for the micro controller and even provide manual reset Crystal XL1 is a

                              110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                              22pf capacitor used as loading capacitor for crystal

                              Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                              RN2 resistance network

                              IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                              the proximity switch and microcontroller and convert its output readable to microcontroller

                              IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                              communication between PC and a microcontroller through connector J3

                              Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                              communication process

                              Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                              power supply connection

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              543 PORT ASSIGNMENTS FOR 89V51RD2FN

                              P00 = switch1 for channel 1

                              P01 = switch2 for channel 2

                              P02 = switch3 for channel 3

                              P03 = switch4 for channel 4

                              P04 = switch5 for coin input sensor (proximity switch)

                              P05 = switch6 for start charging

                              P10 = channel 1 red LED1 (ready system)

                              P11 = channel 2 red LED2 (ready system2)

                              P12 = channel 3 red LED3 (ready system3)

                              P13 = channel 4 red LED4 (ready system4)

                              P14 = channel 1 relay (start system1)

                              P15 = channel 2 relay (start system2)

                              P16 = channel 3 relay (start system3)

                              P17 = channel 4 relay (start system4)

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 6

                              LIST OF THE

                              COMPONENTS

                              List of the components

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              61 LIST OF THE COMPONETS

                              RESISTORS

                              CAPACITORS

                              LIGHT EMITING DIODES (LEDS)- Green Red

                              RELAYrsquoS-

                              TRANSFORMERS

                              RECTIFIER BRIDGES (W 10)

                              OSCILLATOR

                              SWITCHES- Push switches

                              DARLINGTON PAIR IC (ULN2003a)

                              SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                              SERIAL COMMUNICATION DRIVER IC (MAX 232)

                              OPTOCOUPLER IC (4N33)

                              MICROCONTROLLER IC (89V51 RD2)

                              RELIMATE CONNECTOR- 2 pin amp 4 pin

                              RS-232 PORT CONNECTOR

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 7

                              INTRODUCTION

                              OF COMPONENTS

                              Working of components

                              Features or Uses of components

                              Testing of components

                              71 RESISTOR

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              711 WORKING

                              Resistors limit current Resistors are considered to be the most used and the most

                              important component of all the electronic circuits Resistors resist the flow of electrical

                              current The higher the value of resistance (measured in ohms)

                              the lower the current will be

                              712 TESTING

                              Read the indicated color code value then select the OHM-scale within but not way

                              below the indicated value A resistor is good if its resistance is close to the indicated

                              Tolerance should be considered with the ohmmeter reading While no resistance reading at

                              all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                              ohmmeter scale settings resistor is shorted

                              713 SPECIFICATIONS

                              To completely specify a resistors characteristics requires knowledge of the following

                              parameters-

                              bull Value

                              bull Tolerance

                              bull Temperature Coefficient

                              bull Power Rating

                              The specification of a resistor may be marked on its surface using either of two

                              systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                              the second more recent system uses a combination of alpha-numeric characters

                              7 2 CAPACITOR

                              721 WORKING

                              When DC voltage is applied to the capacitor an electric charge is stored on each

                              electrode While the capacitor is charging up current flows The current will stop flowing

                              when the capacitor has fully charged Capacitors find use

                              in circuits for a variety of purposes They are used in

                              time delay generation RC circuits In power supplies for filtering and power supply

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              decoupling as blocking capacitors for power factor correction and motor starting in LC

                              tank circuits and so on

                              722 TESTING

                              To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                              negative probe to the capacitor positive terminal the positive probe to the negative terminal

                              A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                              and moves back again to infinite resistance position A defective indication for an

                              electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                              which is an indication that the capacitor is shorted

                              73 LIGHT EMITING DIODE (LED)

                              731 WORKING

                              LEDs are special diodes that emit light when

                              connected in a circuit They are frequently used as pilot lights in electronic appliances to

                              indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                              the heart of an LED the semi-conductor chip

                              In our project Green LED are used here for mainly two purpose

                              a Charging ON indication (when ON)

                              b Channel fault indication (always OFF)

                              732 TESTING

                              The good and working LED will then light up or glow a busted LED will not LEDs

                              must have a resistor in series to limit the current to a safe value for quick testing purposes a

                              1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                              directly connected to a battery or power supply It will be destroyed the LED

                              733 FEATURES

                              Single color

                              High bright output

                              Low power consumption

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              High reliability and long life

                              734 Descriptions

                              Dice material GaInN

                              Emitting Color Super Bright White

                              Device Outlineφ5mm Round Type

                              Lens Type Water Clear

                              74 RELAY

                              741 WORKING

                              A relay is an electrically operated switch Current

                              flowing through the coil of the relay creates a magnetic field

                              which attracts a lever and changes the switch contacts The coil

                              current can be on or off so relays have two switch positions and

                              most have double throw (changeover) switch contacts

                              Relays are like remote control switches and are used in

                              many applications because of their relative simplicity long life

                              and proven high reliability

                              742 USES

                              The main operation of a relay comes in places where only a low-power signal can be

                              used to control a circuit

                              It is also used in places where only one signal can be used to control a lot of circuits

                              The application of relays started during the invention of telephones They played an

                              important role in switching calls in telephone exchanges They were also used in

                              long distance telegraphy They were used to switch the signal coming from one

                              source to another destination

                              743 TESTING

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              A relay will usually have a coil pole terminal and a set of

                              contacts The set of contacts that are open when the relay is not

                              energized are called normally open (NO) contacts and the set of

                              contacts that are closed when the relay is not energized are called

                              normally closed (NC) contacts The following steps can be used to perform the testing of

                              the relay using a multimeter

                              Keep the multimeter in the continuity check mode

                              Check for continuity between the NC contacts and pole

                              Check for discontinuity between NO contacts and the pole

                              Now energies the relay using the rated voltage For example use a 9V battery for

                              energizing a 9V relay The relay will engage with clicking sound

                              Now check for continuity between NO contacts and pole

                              Also check for discontinuity between NC contacts and pole

                              As a final test measure the resistance of the relay coil using a multimeter and check

                              whether it is matching to the value stated by the manufacturer

                              If all the above tests are positive we can conclude that the relay is healthy

                              75 TRANSFORMER

                              751 WORKING

                              A transformer is a device that transfers electrical energy

                              from one circuit to another through inductively coupled

                              electrical conductors A changing current in the first circuit (the

                              primary) creates a changing magnetic field

                              This changing magnetic field induces a changing voltage in the second circuit (the

                              secondary) This effect is called mutual induction

                              If a load is connected to the secondary circuit electric charge will flow in the

                              secondary winding of the transformer and transfer energy from the primary circuit to the

                              load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                              of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                              number of primary turns

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              By appropriate selection of the numbers of turns a transformer thus allows an

                              alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                              making it less

                              752 TESTING

                              1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                              scale and then adjusting the knob to verify its reading is an easy step to the

                              reading of the ohm

                              2 To check the resistance of the coil unplug or unsolder the leads of the

                              transformer from its circuit and measure the resistance of each coil

                              3 The next step is to test each coil for shorts to other coils

                              76 RECTIFIER BRIDGE (W 10)

                              761 WORKING

                              A diode bridge rectifier is a device for converting AC or

                              alternating current electricity into DC or direct current AC

                              electricity goes from positive to negative constantly whereas DC

                              always flows in the same direction

                              AC electricity is more efficient to transmit and easier to

                              convert into different voltages However most appliances need DC current to run A diode

                              bridge rectifier is the most common type of power supply used to provide this current In

                              our project W10 is a bridge rectifier which provides on single semiconductor chip

                              77 OSCILLATOR

                              771 Working

                              An oscillator puts out an endless series of pulses The output

                              constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              all digital circuits have some type of oscillator This stream of output pulses is often

                              called a clock One of the most important features of any oscillator is its frequency stability

                              or in other words its ability to provide a constant frequency output under varying load

                              conditions Some of the factors that affect the frequency stability of an oscillator include

                              temperature variations in the load and changes in the DC power supply Frequency stability

                              of the output signal can be improved by the proper selection of the components used for the

                              resonant feedback circuit including the amplifier but there is a limit to the stability that can

                              be obtained from normal LC and RC tank circuits

                              In our project instead of 12MHz crystal 110592MHz is used because it can be

                              divided to give you exact clock rates for most of the common baud rates for the UART

                              especially for the higher speeds (9600 19200) These crystals are readily available and

                              commonly used

                              78 SWITCH

                              781 WORKING

                              The most familiar form of switch is a manually operated

                              electromechanical device with one or more sets of electrical contacts

                              Each set of contacts can be in one of two states either closed meaning

                              the contacts are touching and electricity can flow between them or

                              open meaning the contacts are separated and the switch is non

                              conducting The mechanism actuating the transition between these two

                              states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                              momentary (push-for on or push-for off) type

                              782 USES

                              In electronics a switch is an electrical component that can break an electrical

                              circuit interrupting the current or diverting it from one conductor to another

                              783 TESTING

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              When the switch is ON it looks and acts like a wire When the switch is OFF there is

                              no connection Switch can tested by using multimeter in continuity range

                              79 DARLINGTON PAIR IC (ULN2003a)

                              791 WORKING

                              The Darlington transistor (often called a Darlington pair) is a

                              compound structure consisting of two bipolar transistors (either

                              integrated or separated devices) connected in such a way that the

                              current amplified by the first transistor is amplified further by the

                              second one This configuration gives a much higher current gain than

                              each transistor taken separately and in the case of integrated devices

                              can take less space than two individual transistors because they can

                              use a shared collector

                              Integrated Darlington pairs come packaged singly in

                              transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                              The Darlington transistor array used is ULN2003 Applications include relay

                              drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                              drivers and logic buffers Each input of this device has a zener diode and resistor in series

                              to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                              for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                              792 FEATURES

                              The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                              transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                              with common-cathode clamp diodes for switching inductive loads The collector-current

                              rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                              higher current capability

                              710 SERIES VOLTAGE REGULATER IC (78XX)

                              7101 WORKING

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Voltage Regulator (regulator) usually having three legs converts varying input

                              voltage and produces a constant regulated output voltage They are available in a variety of

                              outputs

                              The most common part numbers start with the numbers 78 or 79 and finish with two

                              digits indicating the output voltage The number 78 represents positive voltage and 79

                              negative one The 78XX series of voltage regulators are designed for positive input

                              The LM78XX series typically has the ability to drive current up to 1A For

                              application requirements up to 150mA 78LXX can be used As mentioned above the

                              component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                              an output leg with the regulators voltage

                              As a general rule the input voltage should be limited to 2 to 3 volts above the output

                              voltage The LM78XX series can handle up to 36 volts input be advised that the power

                              difference between the input and output appears as heat If the input voltage is unnecessarily

                              high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                              sinking the regulator will shut down

                              711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                              7111 WORKING

                              The MAX-232 It includes a Charge Pump which generates

                              +10V and -10V from a single 5v supply

                              This IC also includes two receivers and two transmitters in

                              the same package This is handy in many cases when we only want to

                              use the Transmit and Receive data Lines We dont need to use two chips one for the

                              receive line and one for the transmit There are also many variations of these devices The

                              large value of capacitors are not only bulky but also expensive Therefore other devices are

                              available which use smaller capacitors and even some with inbuilt capacitors However the

                              MAX-232 is the most common and thus we will use this RS-232 Level Converter

                              Dual Charge-Pump Voltage Converter

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                              V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                              output

                              712 OPTOCOUPLER IC (4N33)

                              7121 WORKING

                              In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                              photoMOS) is a device that uses a short optical transmission path to transfer a signal

                              between elements of a circuit typically a transmitter and a receiver while keeping them

                              electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                              back to an electrical signal electrical contact along the path is broken

                              Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                              essentially a combination of two distinct devices an optical transmitter typically a gallium

                              arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                              light-triggered diac The two are separated by a transparent barrier which blocks any

                              electrical current flow between the two but does allow the passage of light

                              The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                              silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                              of isolation between driving and load circuits These Optocouplers can be used to replace

                              reed and mercury relays with advantages of long life high speed switching and elimination

                              of magnetic field

                              713 MICROCONTROLLER IC (89V51 RD 2 )

                              713 WORKING

                              The P89V51RD2 is an 80C51 microcontroller with 64

                              kB Flash and 1024 bytes of data RAM

                              A key feature of the P89V51RD2 is its X2 mode option

                              The design engineer can choose to run the application with the conventional 80C51 clock

                              rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              achieve twice the throughput at the same clock frequency Another way to benefit from this

                              feature is to keep the same performance by reducing the clock frequency by half thus

                              dramatically reducing the EMI

                              The Flash program memory supports both parallel programming and in serial In-

                              System Programming (ISP) Parallel programming mode offers gang-programming at high

                              speed reducing programming costs and time to market ISP allows a device to be

                              reprogrammed in the end product under software control The capability to fieldupdate the

                              application firmware makes a wide range of applications possible The P89V51RD2 is also

                              In-Application Programmable (IAP) allowing the Flash program memory to be

                              reconfigured even while the application is running

                              714 RELIMATE CONNECTOR

                              7141 WORKING

                              These are wire to board type connectors used to facilitate

                              proper and firm electrical connection between the relay card and

                              microcontroller card

                              The connector has following specifications

                              No of Ways 2-20

                              Voltage Rating 250V AC DC

                              Current Rating 3A AC DC

                              Contact Resistance 20mW max

                              Insulation Resistance 1000MW min

                              Dielectric Withstanding 1000V ACminute

                              Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                              The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                              connector is it provides a fast and easy connection and disconnection it also avoids polarity

                              conflicts

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              715 RS-232 PORT CONNECTOR

                              7151 WORKING

                              Almost all digital devices which we use require either TTL

                              or CMOS logic levels Therefore the first step to connecting a

                              device to the RS-232 port is to transform the RS-232 levels back

                              into 0 and 5 Volts This is done by RS-232 Level Converters

                              Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                              Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                              The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                              problem in many instances where only a single supply of +5V is present

                              CHAPTER 8

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              IMPLIMENTATION

                              OF THE PCB

                              Components layout designing

                              Developing or Etching the PCB

                              Other operations like Drilling Cutting Tinning

                              81 IMPLIMENTATION OF THE PCB

                              A proper PCB ensure that various circuit components are interconnected as per the

                              circuit diagram once they have been placed on the PCB in their proper positions and

                              subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                              base material to which is permanently attached a flat metallic network of conducting path

                              whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                              for this project is single one

                              The basic material used may be resin coated paper fiber glass ceramic and the flat

                              board configuration however is most widely used and it may be of the nature of the single

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                              which ensures adequate and permanent low resistance coupling

                              811 BOARD DESIGN

                              PCB designed is the most important and requires great care during work In this case

                              great care must be taken while tracing the circuit or layout on the board Because once PCB

                              is designed it is virtually impossible to alter it While designing a circuit designer should

                              take care to avoid crossing of conducting path (tracks) as possible Crossover are

                              unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                              also help to solve this problem when circuit is complicated

                              812 THE MASTER DIAGRAM

                              The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                              which is commonly made twice as the finished circuit since this makes the working on that

                              much easier especially when circuit is complicated photography eventually reduces the

                              size of diagram to that of the circuit before proceeding we must know some rules regarding

                              the designing -

                              a The space between the conductors must be strictly controlled to avoid the possibility

                              of electrical discharges or unwanted capacitance The amount by which the mater

                              diagram is to reduce in size is thus a critical deign feature

                              b The conductor must be wider in those part of the circuits that are going to handle

                              large current must be handle without undue temperature of conductors

                              c The minimum width of copper should not generally be less than about 15mmThis

                              is related to mechanical strength rather than electrical properties and it also ensure

                              that strips remains securely bounded to the base material

                              d The points where the component holes for component lead wire occurs must be sited

                              to suit the dimensions of the component and dimensions between lead-out wire so

                              that the components can be situated correctly on finished board The conductor is

                              also main large at the point of holes

                              813 PCB MAKING

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              When the mater diagram probable twice the size of real PCB has been evolved the

                              test major step consists of etching or dissolving the unwanted metal from copper claded

                              board to create a circuit as depicted by master diagram It must be stressed that very

                              accurate checking master is essential at this stage Then the master point is mounted on a

                              special frame on easy facing of a larger camera and with the aid of the very powerful

                              illumination a master diagram is clearly photographed on a glass sensitive plate This is

                              developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                              brought into operation This comprises the camera body mounted so that sideways after

                              each exposure In this way number of copies of the original master diagram is set out

                              exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                              In case of simple and need of number of less PCB economic and advisable to use the

                              following lab method of PCB making

                              Planning The Circuit

                              It is not a particular difficult There are several important factors that need not be

                              taken into account if the finished device is to work properly we must consider gain factor

                              and ensure that the input and output parts are sufficiently well isolated to avoid the

                              possibility We must also ensure that conductors and components carrying high frequency

                              current are well separated from the part of the circuit We are also to make sure that all

                              components need to return to earth are properly connected and that possibility of common

                              impedance arising earth returned

                              Circuit is totally eliminated by making all earth as substantial possible consistent

                              with nature of design Other factors that have to successfully studied include availability of

                              adequate return points on board and itrsquos mounting from accessibility of switch connection

                              made for mechanical fixing ventilation effect of vibration

                              Cleaning The Board

                              The copper side of the board must be thoroughly cleaned before circuit plan is

                              transferred to it This is important because even slightest trace of graze (from figure of

                              instance) will impure the etching process and when the circuit plan has been neatly

                              transferred to copper in this manner the board is held under running tap and the allowed to

                              dry before resist is applied

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Transforming the Plan

                              Now once cleaning is done plan has to transfer on copper surface of PCB material

                              A convenient way to do this is simply put the carbon paper between a copper surface of the

                              board and working plan and carefully trace the lines of original plan with a ball pen

                              Resist

                              Resist is nothing more than a substrate that is unaffected by presence etching

                              chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                              clearly worked on clean copper that are to be left in fact as the copper conductor must be

                              covered when resists the leaguer type of paints possess good resist properties but

                              disadvantage of relatively long time taken for drying It is essential to resist through

                              hardening before etching is started Nail polished are better as they quickly and are less

                              difficult to remove

                              To overcome this drying effect and to achieve the sharp edge of the trace on the

                              PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                              short circulating due to paints are completely the avoid etching tapes and pads are available

                              in different sizes

                              Correcting Error

                              When a result has been thoroughly hardened any errors that have been made can

                              usually be corrected by gently scratching away with knife To ensure clear out lines round

                              edges of copper conductors on board the resist must be applied with steady band

                              Etching

                              Next comes etching of unwanted copper amp whether a small single is all that is

                              required as quantity of board to be produce certain precautions must be taken before

                              operation is commenced the most used etch amp I ferrite chloride to this is added small

                              quantity of HCL to accelerate But not critical as lab construction concerned A good

                              etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                              grams of water

                              Agitation

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                              the etchant process The depth of liquid must be sufficient to completely cover laminate the

                              laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                              gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                              temperature and thickness of copper foil

                              Finishing Off

                              When all unwanted copper is dissolved from areas between conductor board should

                              be taken from an etchant amp washed in water The resist must be removed using proper

                              solvent After this the copper surface must be polished with any kind of cleaner It should be

                              seen that there is no slight incomplete etching between the conducting parts of the PCB The

                              PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                              This process is called Tinning This process of coating involve track with soldier

                              Advantage of tinning the effect of environment of conductors then PCB is drilled

                              ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                              Assembling On PCB

                              After the holes are drilled the component have to be assembled on PCB before

                              assembling the components it is necessary to clean soldering iron in order to get easy amp

                              accurate soldering Removing impurity particles that are gathered on iron bit due to

                              repetitive use cleans soldering iron

                              CHAPTER 9

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              SOLDERING

                              TECHNIQUE

                              Technique for good soldering

                              91 SOLDERING TECHNIQUE

                              For soldering of any joints first the terminal to be soldered are cleaned to remove

                              oxide film or dirt on it If required flux is applied on the points to be soldered

                              Now the joint to be soldered is heated with the help of soldering iron Heat

                              applied should be such that when solder wire is touched to joint it must melt

                              quickly

                              The joint and the soldering iron is held such that molten solder should flow

                              smoothly over the joint

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              When joint is completely covered with molten solder the soldering iron is re-

                              moved

                              The joint is allowed to cool without any movement

                              The bright shining solder indicates good soldering

                              In case of dry solder joint a air gap remains in between the solder material and

                              the joint It means that soldering is improper This is removed and again solder-

                              ing is done

                              Thus this way all the components are soldered on P C B

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 10

                              PCB LAYOUTS

                              Schematic diagram

                              Bottom and top layout

                              101 POWER SUPPLY CARD

                              1011 SCHIMETIC DIAGRAM

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1012 LEGEND MARKING

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                              Fig1011 Schematic diagram of power supply card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1013TOP LAYER

                              1014 BOTTOM LAYER

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                              Fig1013 Top layer of power supply

                              card

                              Fig1014 Schematic diagram of power supply card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              102 BATTERY CHARGER CARD

                              1021 SCHEMATIC DIAGRAM

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                              Fig1021 Schematic diagram of battery charger card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              103 RELAY CARD

                              1031 SCHIMETIC DIAGRAM

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                              Fig1031 Schematic diagram of Relay card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1032 RELAY CARD LEGEND MARKING

                              1033 TOP LAYER

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                              Fig1032 Legend marking of Relay card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1034 BOTTOM LAYER

                              104 MICROCONTROLER CARD

                              1041 SCHIMETIC DIAGRAM

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                              Fig1034 Bottom layer of Relay card

                              Fig1041 Schematic diagram of microcontroller card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1042 ALL LAYERS

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                              Fig1042 All layer of microcontroller card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 11

                              INTRODUCTION

                              OF SOFTWARE

                              Keil (microVision 2)

                              Eagle (Easily Applicable Graphical Layout Editor)

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              111 Keil (microVision 2)

                              1111 Introduction to C51 Cross Compiler

                              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                              generate fast compact code for the 8051 microcontroller family The C51 Compiler

                              generates object code that matches the efficiency and speed of assembly programming

                              Using a high-level language like C has many advantages over assembly language

                              programming

                              Knowledge of the processor instruction set is not required Rudimentary knowledge of

                              the memory structure of the 8051 CPU is desirable (but not necessary)

                              Details like register allocation and addressing of the various memory types and data

                              types is managed by the compiler

                              Programs get a formal structure (which is imposed by the C programming language) and

                              can be divided into separate functions This contributes to source code reusability as

                              well as better overall application structure

                              The ability to combine variable selection with specific operations improves program

                              readability

                              Keywords and operational functions that more nearly resemble the human thought

                              process may be used

                              Programming and program test time is drastically reduced

                              The C run-time library contains many standard routines such as formatted output

                              numeric conversions and floating-point arithmetic

                              Existing program parts can be more easily included into new programs because of

                              modular program construction techniques

                              The language C is a very portable language (based on the ANSI standard) that enjoys

                              wide popular support and is easily obtained for most systems Existing program

                              investments can be quickly adapted to other processors as needed

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1112 Software Development Cycle in Keil

                              When we use the Keil Software tools the

                              project development cycle is roughly the same as

                              it is for any other software development project

                              1 Create a project select the target chip from the

                              device database and configure the tool settings

                              2 Create source files in C or assembly

                              3 Build your application with the project

                              manager

                              4 Correct errors in source files

                              5 Test the linked application A block diagram of

                              the complete 8051 tool set may best illustrate the

                              development cycle

                              112 Eagle (Easily Applicable Graphical Layout Editor)

                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                              1121 Schematic Editor

                              In this one can develop amp design circuits for the required PCB

                              1122 Layout Editor

                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                              Fig 111 Software development in KEIL

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1123 Library Editor

                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                              1124 Auto Router

                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                              the PCB tracks designed

                              1125 Cam Processor

                              This is used to finally print the various layers of the designed PCB viz Top Layer

                              Bottom Layer Component Layer Masking Layer etc

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                              Start

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 12

                              INTRODUCTION

                              OF

                              PROGRAMMING

                              Flowchart of programming

                              Program code

                              121 Flowchart

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                              2

                              flag9==1

                              flag9=1

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                              flag11==1

                              flag11=1 flag11=0 flag4=0

                              REady_LED4=0

                              Sw2_op (P01) ==0

                              My delay (10)

                              3 3

                              flag2=1 disp2=1 k2=0

                              3

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                              4

                              flag11==1

                              flag11=0 flag4=0 REady_LED4=0

                              flag11=1

                              My delay (10)

                              flag3=1 disp3=1 k3=0

                              k1==0||k2==0||k4==0

                              Sw3_op (P02) ==0

                              5

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                              flag5==1

                              5

                              flag11==1

                              flag7=1

                              flag7==1

                              flag7=0 flag2=0 REady_LED2=0

                              6

                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                              flag11=0 flag4=0 REady_LED4=0

                              flag11=1

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                              6

                              My delay (10)

                              flag4=1 disp4=1 k4=0

                              k1==0||k2==0||k3==0 flag5==1

                              7

                              Sw4_op (P03) ==0

                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                              7

                              flag7==1

                              flag9==1

                              flag7=1

                              flag7=0 flag2=0 REady_LED2=0

                              flag9=0 flag3=0 REady_LED3=0

                              flag9=1

                              Sw5_op A(P04) ==0

                              My delay (10)

                              8

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                              9

                              flag2==1

                              flag3==1

                              8

                              flag1==1

                              flag4==1 flag5=1 disp5=1

                              flag9=1 disp5=1

                              flag7=1 disp5=1

                              flag11=1 disp5=1

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                              Sw6_op (P05) ==0

                              My delay (10)

                              flag2==1 ampamp flag7==1

                              flag3==1 ampamp flag9==1 9

                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                              flag8=1 disp6=1

                              10

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                              10

                              flag4==1 ampamp flag11==1

                              flag10=1 disp6=1

                              flag12=1 disp6=1

                              flag8==1

                              flag10==1

                              11

                              flag6==1

                              i++

                              l++

                              j++

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                              flag12==1

                              M++

                              11

                              Stop

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              122 Program

                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                              define buzzerP2_0 buzzer indication

                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                              sbit sw5_op=P0^4 input switch5 for coin

                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                              output Led for indication

                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                              function prototype declaration

                              void my_delay(unsigned int value) DELAY FUCTION

                              void init_timer() timer 0 initialization function

                              variable declaration

                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              start of main programme

                              void main()

                              init_timer() call it timer initialization function

                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                              start of while loop

                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                              condition for switch1

                              if(flag1==1) check swich1 pressed if(disp1==1 )

                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                              if(iltk) loop will repeat for desired time of charging

                              if(igt=1000)

                              buzzer=1 turn on buzzer if (ii==20)

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              REady_LED1=1 turn on ready indication of led1

                              else if(ii==40)

                              REady_LED1=0ii=0

                              elseREady_LED1=0

                              START_LED1=1

                              else

                              START_LED1=0

                              k1=1 buzzer=0

                              REady_LED1=0 flag1=0

                              flag5=0flag6=0

                              condition for switch2

                              if(flag2==1) check swich2 pressed if(disp2==1)

                              REady_LED2=1 turn on ready 2 led indication

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              disp2=0

                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                              if(jltk)

                              if(jgt1000) buzzer=1 if(jj==20)

                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                              elseREady_LED2=0

                              START_LED2=1

                              else START_LED2=0

                              REady_LED2=0 k2=1 buzzer=0

                              flag2=0flag7=0flag8=0

                              j=0jj=0

                              condition for switch 3

                              if(flag3==1) check swich3 pressed

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              if(disp3==1 )

                              REady_LED3=1 disp3=0

                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                              if(lltk)

                              if(lgt1000) buzzer=1 if(ll==20)

                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                              elseREady_LED3=0

                              START_LED3=1

                              else START_LED3=0

                              LED2=0 k3=1 buzzer=0

                              REady_LED3=0 flag3=0

                              flag9=0flag10=0

                              l=0ll=0

                              condition for switch 4

                              if(flag4==1) check swich4 pressed if(disp4==1 )

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              REady_LED4=1 disp4=0

                              if(flag11==1) check coin is pressed

                              if(flag12==1) START is pressed

                              if(mltk)

                              if(mgt1000)

                              buzzer=1 if(mm==20)

                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                              elseREady_LED4=0

                              START_LED4=1

                              else START_LED4=0

                              buzzer=0 k4=1

                              REady_LED4=0 flag4=0

                              flag11=0flag12=0

                              m=0mm=0

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              while(1)

                              end of main programme

                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                              whenever specific time the interrupt will generate control will go in following function

                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if(sw1_op==0 ) ready switch flag for system1

                              my_delay(10) CALL DELAY FUNCTION

                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                              if(flag7==1) SET THE FLAG

                              flag7=1

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                              flag9=1

                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                              flag11=1

                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if(sw2_op==0 ) fready switch flag for system2

                              my_delay (10)

                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                              if(flag5==1)

                              flag5=1

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                              flag9=1

                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                              flag11=1

                              elseflag11=0flag4=0REady_LED4=0

                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                              if(flag7==1)

                              flag7=1

                              else

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                              flag5=1

                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                              flag11=1

                              elseflag11=0flag4=0REady_LED4=0

                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                              if(flag7==1)

                              flag7=1

                              elseflag7=0

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              flag2=0REady_LED2=0 if(flag5==1)

                              flag5=1

                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                              flag9=1

                              elseflag9=0flag3=0REady_LED3=0

                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                              if(flag6==1)

                              i++ if (igt1000) ii++

                              if (flag8==1)

                              j++ if(jgt1000) jj++

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              if (flag10==1)

                              l++ if (lgt1000) ll++

                              if (flag12==1)

                              m++ if (mgt1000) mm++

                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 13

                              TROUBLE SHOOT

                              Troubleshoot

                              131 TROUBLE SHOOT

                              A newly assembled circuit does not work may be due to -

                              Faulty components

                              Improper soldering

                              Wrong connections

                              Also any stop in working after some period may be due to -

                              Component failure

                              Supply failure

                              Damaging of PCB

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Fault finding is very essential if you want the circuit to operate properly

                              If a newly assembled circuit is not working properly check all the components and

                              circuit connections according to the diagram The circuit may not be working due to wrong

                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                              proper soldering

                              If faults are not observed during physical observations one should proceed for Hot

                              test ie Voltage measurement at different points for example at Input terminal etc

                              Resistance measurement is also done which is known as Dry test

                              During this project work some green LEDs was not glow then we checked it

                              continuity and replace it

                              Also relay was not properly worked therefore we replaced it Some ICs was get

                              heated after starting the project It happens because of some soldering points are shorted

                              during soldering PCB We solved that problem

                              CHAPTER 14

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              ADVANTAGES OF

                              THE PROJECT

                              Advantages

                              141 ADVANTAGES OF THE PROJECT

                              Simple and hand efficient Microcontroller based system

                              Fast charging capacity

                              Simple to operate

                              Ease of mobility

                              Facilitates connectivity for 90 of cellular phones

                              Less expensive

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Reduced man power

                              Low power consumption

                              It can offer emergency charging for 4sets of handsets synchronously

                              CHAPTER 15

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              DISADVANTAGES

                              OF THE PROJECT

                              Disadvantages

                              151 DISADVANTAGES OF THE PROJECT

                              It requires mains supply to work project

                              Due to limited charging channels till now there may be a possibility that

                              mobile phones of few brands cannot be connected for charging For this

                              purpose we have to use separate connectors for that specific brand differently

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                              min

                              It does not have battery backup therefore it cannot be portable

                              CHAPTER 16

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              APPLICATIONS OF

                              THE PROJECT

                              Application

                              161 APPLICATIONS OF THE PROJECT

                              The coin based mobile phone charger is very useful to public for using coin to

                              charge for the mobile phone in any places

                              It is used for emergency charging purposes

                              It can be installed in malls railway stations bus stops and other public

                              places

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              The charger offers a unique revenue opportunity for a vast range of

                              businesses - from airports to pubs from universities to health clubs virtually

                              any location where there is a high footfall creating a large number of

                              potential users

                              It can be installed in offices and collages for pay charging facility

                              CHAPTER 17

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              FUTURE

                              DEVELOPMENT OF

                              THE PROJECT

                              FUTURE DEVELOPMENT OF THE PROJECT

                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                              This project is very useful to people who are using mobile phone without charging

                              condition in public places

                              It will use with a stereo advertisement carrier that can display video advertisement

                              It will provide battery backup for make it portable

                              It will also provide SMS system in future

                              We can also increase the charging time by editing software of the project

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 18

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              COST ANALYSIS

                              OF THE PROJECT

                              COST ANALYSIS OF THE PROJECT

                              181 COST ANALYSIS OF THE PROJECT

                              1811 Component list for power supply card

                              Footprint Quantity Designators Rate

                              Resistor

                              22K 1 R2 1

                              1K 1 R1 1

                              Capacitor

                              1000uf25V 1 C5 10

                              2200uf25V 1 C1 10

                              022uf 2 C6 C2 1

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                              Table 1811 Component list for power supply card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              01uf 2 C4 C3 1

                              IC

                              BRIDGE W10 2 BR2 BR1 10

                              L7812CV (TO-220) 1 U2 8

                              L7805CV (TO-220) 1 U1 8

                              Connector

                              CON PHO 2PIN 2 J3 J2 16

                              CON PHO 3PIN 1 J1 12

                              LED3mm red 2 L1 L2 15

                              Heat sink (TO-220) 2 16

                              Total 955

                              1812 Component list for battery charger card

                              Footprint Quantity Rate

                              Capacitor

                              2200uf25V 1 1000

                              022uf 4 100

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              01uf 4 100

                              IC

                              BRIDGE W10 1 500

                              L7805CV (TO-220) 4 3200

                              Connector

                              CON PHO 2PIN 1 800

                              Relimate 2 pin 1 400

                              relimate 3 pin 4 2000

                              Heat sink (TO-220) 4 1200

                              TOTAL 9300

                              1813 Component list for Relay card

                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                              Table 1812Component list for battery charger card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                              Total 18900

                              1814Component list for controller card

                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                              Table 1813Component list for relay card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                              total 27000

                              1815 Miscellaneous material

                              Material Quantity Rate

                              electronic item

                              Transformer

                              TXR1 0-9-15 1 20000

                              0-9 1A

                              0-15 100mA

                              TXR2 0-9 1 16500

                              0-9 1A

                              Proximity switch 1 20000

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                              Table 1814Component list for microcontroller card

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Red push bottom 4 4000

                              Green push button 1 1000

                              Red led 5mm 4 800

                              Green led 5mm 4 800

                              Led holder 8 1600

                              Copper clad 2 4000

                              3 core cable 1 meter 1500

                              3 pin plug 1 3000

                              2 pin relimate wire 19 9000

                              3 pin relimate wire 5 3750

                              4 pin relimate wire 2 2000

                              mechanical items

                              Enclosure 1 25000

                              Acrylic sheet 2 X 1 30000

                              12mm cable gland 1 1000

                              Screw 3mm 33 2000

                              Screw 35mm 6 2400

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              10 mm spacers 100 1500

                              10mm insert to stud 50 10000

                              cable tie 2500

                              Total 162350

                              CHAPTER 19

                              APPENDIX

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                              Table 1815Component list for miscellaneous material

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              APPENDIX

                              191 APPENDIX

                              1911 78xx IC datasheet

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                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1912 W10 datasheet

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1913 4n33 IC datasheet

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                              1914 MAX 232

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                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1915 ULN2003a IC datasheet

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              1916 89V51RD2 IC datasheet

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 20

                              CONCLUSION

                              CONCLUSION

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                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              201 CONCLUSION

                              The coin-operated mobile phone charger is already successfully installed in

                              hundreds of locations worldwide providing a unique service to the public and a source of

                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                              installed in any business premises

                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                              from airports to pubs from universities to health clubs virtually any location where there is

                              a high footfall creating a large number of potential users

                              The charger can charge up to 4 different mobile phones simultaneously It will

                              extend low mobile phone talk time provide battery charging

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 21

                              IMAGES OF THE

                              PROJECT

                              Images of the project

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              211 IMAGES OF THE PROJECT

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                              fig211 lsquoCoin operated mobile battery charger

                              Fig212 Circuit arrangement of coin operated mobile battery charger

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Fig 216 Relay driver circuit

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                              Fig 213 Constant voltage battery charger circuit

                              Fig214 Power supply circuit

                              Fig215 Metal detector proximity switch

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Fig217 Microcontroller circuit

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              Fig228 coin operated mobile battery charger project presentation

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              CHAPTER 22

                              BIBILOGRAPHY

                              BIBLIOGRAPHY

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                              221 BIBLIOGRAPHY

                              BOOKS

                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                              INTERNET LINKS

                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                              • CHAPTER 1

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Load

                                The load can be anything which wants to switch ON by using power supply

                                513 CIRCUIT DIAGRAM EXPLANATION

                                Regulated power supplies are commonly used in engineering projects Power

                                supply is food of any circuit

                                +5V SUPPLY UNIT

                                +5V supply is obtained from the +5V supply unit for microcontroller and

                                digital ICs Initially 230 V AC supply is reduced to (0-9V) with the help of a step down

                                transformer having a capacity of 500mA

                                Since the input voltage to the regulator IC should be more than its output

                                voltage transformer secondary voltage is 9VThis low voltage is rectified with the help

                                of bridge rectifier The ripples are minimized with the help of capacitor filter to get a

                                smooth DC supply The rating of the chosen capacitor filter is 1000microF

                                The regulated DC voltage is obtained by using a regulator IC 7805 In the

                                case of IC 7805 the unregulated DC voltage is applied to Pin 1 and the output is taken at

                                Pin 3 and Pin 2 is grounded Another capacitor filter of rating 10microF is connected at the

                                output of regulator IC to eliminate the voltage oscillations at the output due to the large

                                voltage oscillations at the input of the regulator

                                +12V SUPPLY UNIT

                                The plusmn12 V supply required by the relay is provided by the 12V supply circuit

                                arrangement Initially 230 V AC supply is reduced to (15V-0-15V) with the help of a

                                step down transformer having a capacity of 1A and the center tap of the transformer is

                                grounded This low voltage is rectified with the help off bridge rectifier

                                Since the input voltage to the regulator IC should be more than its output

                                voltage transformer secondary voltage is 15V-0-15VThe ripples are minimized with

                                the help of capacitor filter to get a smooth DC supply The rating of the chosen capacitor

                                filter is 1000microF The regulated DC output voltage is obtained by using regulator ICs

                                For regulated +12V DC supply IC 7812 is used and for regulated -12V DC supply IC

                                7912 is used

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 16

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                                the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                                connected at the output as shown in figure to eliminate the voltage oscillations at the

                                output due to the large voltage oscillations at the input of the regulator

                                52 CONSTANT VOLTAGE CHARGER

                                521 CIRCUIT DIAGRAM

                                Fig 53 Circuit diagram of the battery charger

                                522 CIRCUIT DIAGRAM EXPLANATION

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Constant-voltage (often called constant-potential) chargers maintain nearly the same

                                voltage input to the battery throughout the charging process regardless of the batterys state

                                of charge Constant-voltage chargers provide a high initial current to the battery because of

                                the greater potential difference between the battery and charger

                                A constant-voltage charger may return as much as 70 of the previous discharge in

                                the first 30 minutes This proves useful in many battery applications involving multiple

                                discharge scenarios As the battery charges its voltage increases quickly This reduces the

                                potential that has been driving the current with a corresponding rapid decrease in charge

                                current as depicted in the illustration below As a result even though the battery reaches

                                partial charge quickly obtaining a full charge requires prolonged charging

                                Given this behavior constant-voltage chargers are frequently found in applications

                                that normally allow extended charging periods to attain full charge Constant-voltage

                                chargers should not be used where there is frequent cycling of the battery Repeated

                                discharges without returning the cell to its full charge will eventually decrease the battery

                                capacity and may damage individual cells

                                Fig 54An Illustration graph of the charging function of constant battery charger

                                Constant-voltage chargers are most often used in two very different modes as a fast

                                charger to restore a high percentage of charge in a short time or as a float charger to

                                minimize the effects of overcharge on batteries having infrequent discharges

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                53 RELAY DRIVER CIRCUIT

                                531 CIRCUIT DIAGRAM

                                532 CIRCUIT DIAGRAM EXPLANATION

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                                Fig 55 Relay driver circuit

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Input from the controller is connected to the relay card through connector J1 which

                                carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                                pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                                These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                                relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                                series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                                and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                                relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                                NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                                3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                                RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                                is used to connect power supply to relay card

                                533 WORKING

                                While taking Relay1 (RL1) into consideration we will discuss the working of relay

                                card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                                of the IC are in cut off region which causes an open circuit so there is no current flow

                                flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                                applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                                completes the path ie provide ground to the relay coil so the current flows through the

                                LED activating the relay

                                As the current flows through the relay coil it gets energized and switch over the

                                contacts ie common and normally open contact get connected and provide a path to flow

                                current from J11 ie charger into the load connected at J4 hence the cell phone charging

                                process starts The same above process is applies for all relays If LED is fused or

                                damaged the path will be open and relay will not be energized and if relay is damaged the

                                led will not be illuminated So the LED here is used as a FAULT indicator and a

                                CHARGING ON indicator

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                54 MICROCONTORLLER CIRCUIT

                                541 CIRCUIT DIAGRAM

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                542 CIRCUIT DIAGRAM EXPLANATION

                                CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                port P04 through J4 and START switch is connected to port P05 through SW5

                                Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                Output for relay card is taken on port P14 to P17

                                Components C1 R1 and push button S1 forms reset circuit which provides a power

                                on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                22pf capacitor used as loading capacitor for crystal

                                Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                RN2 resistance network

                                IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                the proximity switch and microcontroller and convert its output readable to microcontroller

                                IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                communication between PC and a microcontroller through connector J3

                                Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                communication process

                                Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                power supply connection

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                P00 = switch1 for channel 1

                                P01 = switch2 for channel 2

                                P02 = switch3 for channel 3

                                P03 = switch4 for channel 4

                                P04 = switch5 for coin input sensor (proximity switch)

                                P05 = switch6 for start charging

                                P10 = channel 1 red LED1 (ready system)

                                P11 = channel 2 red LED2 (ready system2)

                                P12 = channel 3 red LED3 (ready system3)

                                P13 = channel 4 red LED4 (ready system4)

                                P14 = channel 1 relay (start system1)

                                P15 = channel 2 relay (start system2)

                                P16 = channel 3 relay (start system3)

                                P17 = channel 4 relay (start system4)

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 6

                                LIST OF THE

                                COMPONENTS

                                List of the components

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                61 LIST OF THE COMPONETS

                                RESISTORS

                                CAPACITORS

                                LIGHT EMITING DIODES (LEDS)- Green Red

                                RELAYrsquoS-

                                TRANSFORMERS

                                RECTIFIER BRIDGES (W 10)

                                OSCILLATOR

                                SWITCHES- Push switches

                                DARLINGTON PAIR IC (ULN2003a)

                                SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                OPTOCOUPLER IC (4N33)

                                MICROCONTROLLER IC (89V51 RD2)

                                RELIMATE CONNECTOR- 2 pin amp 4 pin

                                RS-232 PORT CONNECTOR

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 7

                                INTRODUCTION

                                OF COMPONENTS

                                Working of components

                                Features or Uses of components

                                Testing of components

                                71 RESISTOR

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                711 WORKING

                                Resistors limit current Resistors are considered to be the most used and the most

                                important component of all the electronic circuits Resistors resist the flow of electrical

                                current The higher the value of resistance (measured in ohms)

                                the lower the current will be

                                712 TESTING

                                Read the indicated color code value then select the OHM-scale within but not way

                                below the indicated value A resistor is good if its resistance is close to the indicated

                                Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                ohmmeter scale settings resistor is shorted

                                713 SPECIFICATIONS

                                To completely specify a resistors characteristics requires knowledge of the following

                                parameters-

                                bull Value

                                bull Tolerance

                                bull Temperature Coefficient

                                bull Power Rating

                                The specification of a resistor may be marked on its surface using either of two

                                systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                the second more recent system uses a combination of alpha-numeric characters

                                7 2 CAPACITOR

                                721 WORKING

                                When DC voltage is applied to the capacitor an electric charge is stored on each

                                electrode While the capacitor is charging up current flows The current will stop flowing

                                when the capacitor has fully charged Capacitors find use

                                in circuits for a variety of purposes They are used in

                                time delay generation RC circuits In power supplies for filtering and power supply

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                decoupling as blocking capacitors for power factor correction and motor starting in LC

                                tank circuits and so on

                                722 TESTING

                                To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                and moves back again to infinite resistance position A defective indication for an

                                electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                which is an indication that the capacitor is shorted

                                73 LIGHT EMITING DIODE (LED)

                                731 WORKING

                                LEDs are special diodes that emit light when

                                connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                the heart of an LED the semi-conductor chip

                                In our project Green LED are used here for mainly two purpose

                                a Charging ON indication (when ON)

                                b Channel fault indication (always OFF)

                                732 TESTING

                                The good and working LED will then light up or glow a busted LED will not LEDs

                                must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                directly connected to a battery or power supply It will be destroyed the LED

                                733 FEATURES

                                Single color

                                High bright output

                                Low power consumption

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                High reliability and long life

                                734 Descriptions

                                Dice material GaInN

                                Emitting Color Super Bright White

                                Device Outlineφ5mm Round Type

                                Lens Type Water Clear

                                74 RELAY

                                741 WORKING

                                A relay is an electrically operated switch Current

                                flowing through the coil of the relay creates a magnetic field

                                which attracts a lever and changes the switch contacts The coil

                                current can be on or off so relays have two switch positions and

                                most have double throw (changeover) switch contacts

                                Relays are like remote control switches and are used in

                                many applications because of their relative simplicity long life

                                and proven high reliability

                                742 USES

                                The main operation of a relay comes in places where only a low-power signal can be

                                used to control a circuit

                                It is also used in places where only one signal can be used to control a lot of circuits

                                The application of relays started during the invention of telephones They played an

                                important role in switching calls in telephone exchanges They were also used in

                                long distance telegraphy They were used to switch the signal coming from one

                                source to another destination

                                743 TESTING

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                A relay will usually have a coil pole terminal and a set of

                                contacts The set of contacts that are open when the relay is not

                                energized are called normally open (NO) contacts and the set of

                                contacts that are closed when the relay is not energized are called

                                normally closed (NC) contacts The following steps can be used to perform the testing of

                                the relay using a multimeter

                                Keep the multimeter in the continuity check mode

                                Check for continuity between the NC contacts and pole

                                Check for discontinuity between NO contacts and the pole

                                Now energies the relay using the rated voltage For example use a 9V battery for

                                energizing a 9V relay The relay will engage with clicking sound

                                Now check for continuity between NO contacts and pole

                                Also check for discontinuity between NC contacts and pole

                                As a final test measure the resistance of the relay coil using a multimeter and check

                                whether it is matching to the value stated by the manufacturer

                                If all the above tests are positive we can conclude that the relay is healthy

                                75 TRANSFORMER

                                751 WORKING

                                A transformer is a device that transfers electrical energy

                                from one circuit to another through inductively coupled

                                electrical conductors A changing current in the first circuit (the

                                primary) creates a changing magnetic field

                                This changing magnetic field induces a changing voltage in the second circuit (the

                                secondary) This effect is called mutual induction

                                If a load is connected to the secondary circuit electric charge will flow in the

                                secondary winding of the transformer and transfer energy from the primary circuit to the

                                load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                number of primary turns

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                By appropriate selection of the numbers of turns a transformer thus allows an

                                alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                making it less

                                752 TESTING

                                1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                scale and then adjusting the knob to verify its reading is an easy step to the

                                reading of the ohm

                                2 To check the resistance of the coil unplug or unsolder the leads of the

                                transformer from its circuit and measure the resistance of each coil

                                3 The next step is to test each coil for shorts to other coils

                                76 RECTIFIER BRIDGE (W 10)

                                761 WORKING

                                A diode bridge rectifier is a device for converting AC or

                                alternating current electricity into DC or direct current AC

                                electricity goes from positive to negative constantly whereas DC

                                always flows in the same direction

                                AC electricity is more efficient to transmit and easier to

                                convert into different voltages However most appliances need DC current to run A diode

                                bridge rectifier is the most common type of power supply used to provide this current In

                                our project W10 is a bridge rectifier which provides on single semiconductor chip

                                77 OSCILLATOR

                                771 Working

                                An oscillator puts out an endless series of pulses The output

                                constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                all digital circuits have some type of oscillator This stream of output pulses is often

                                called a clock One of the most important features of any oscillator is its frequency stability

                                or in other words its ability to provide a constant frequency output under varying load

                                conditions Some of the factors that affect the frequency stability of an oscillator include

                                temperature variations in the load and changes in the DC power supply Frequency stability

                                of the output signal can be improved by the proper selection of the components used for the

                                resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                be obtained from normal LC and RC tank circuits

                                In our project instead of 12MHz crystal 110592MHz is used because it can be

                                divided to give you exact clock rates for most of the common baud rates for the UART

                                especially for the higher speeds (9600 19200) These crystals are readily available and

                                commonly used

                                78 SWITCH

                                781 WORKING

                                The most familiar form of switch is a manually operated

                                electromechanical device with one or more sets of electrical contacts

                                Each set of contacts can be in one of two states either closed meaning

                                the contacts are touching and electricity can flow between them or

                                open meaning the contacts are separated and the switch is non

                                conducting The mechanism actuating the transition between these two

                                states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                momentary (push-for on or push-for off) type

                                782 USES

                                In electronics a switch is an electrical component that can break an electrical

                                circuit interrupting the current or diverting it from one conductor to another

                                783 TESTING

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                no connection Switch can tested by using multimeter in continuity range

                                79 DARLINGTON PAIR IC (ULN2003a)

                                791 WORKING

                                The Darlington transistor (often called a Darlington pair) is a

                                compound structure consisting of two bipolar transistors (either

                                integrated or separated devices) connected in such a way that the

                                current amplified by the first transistor is amplified further by the

                                second one This configuration gives a much higher current gain than

                                each transistor taken separately and in the case of integrated devices

                                can take less space than two individual transistors because they can

                                use a shared collector

                                Integrated Darlington pairs come packaged singly in

                                transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                The Darlington transistor array used is ULN2003 Applications include relay

                                drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                792 FEATURES

                                The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                with common-cathode clamp diodes for switching inductive loads The collector-current

                                rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                higher current capability

                                710 SERIES VOLTAGE REGULATER IC (78XX)

                                7101 WORKING

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Voltage Regulator (regulator) usually having three legs converts varying input

                                voltage and produces a constant regulated output voltage They are available in a variety of

                                outputs

                                The most common part numbers start with the numbers 78 or 79 and finish with two

                                digits indicating the output voltage The number 78 represents positive voltage and 79

                                negative one The 78XX series of voltage regulators are designed for positive input

                                The LM78XX series typically has the ability to drive current up to 1A For

                                application requirements up to 150mA 78LXX can be used As mentioned above the

                                component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                an output leg with the regulators voltage

                                As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                difference between the input and output appears as heat If the input voltage is unnecessarily

                                high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                sinking the regulator will shut down

                                711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                7111 WORKING

                                The MAX-232 It includes a Charge Pump which generates

                                +10V and -10V from a single 5v supply

                                This IC also includes two receivers and two transmitters in

                                the same package This is handy in many cases when we only want to

                                use the Transmit and Receive data Lines We dont need to use two chips one for the

                                receive line and one for the transmit There are also many variations of these devices The

                                large value of capacitors are not only bulky but also expensive Therefore other devices are

                                available which use smaller capacitors and even some with inbuilt capacitors However the

                                MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                Dual Charge-Pump Voltage Converter

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                output

                                712 OPTOCOUPLER IC (4N33)

                                7121 WORKING

                                In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                between elements of a circuit typically a transmitter and a receiver while keeping them

                                electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                back to an electrical signal electrical contact along the path is broken

                                Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                essentially a combination of two distinct devices an optical transmitter typically a gallium

                                arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                light-triggered diac The two are separated by a transparent barrier which blocks any

                                electrical current flow between the two but does allow the passage of light

                                The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                of isolation between driving and load circuits These Optocouplers can be used to replace

                                reed and mercury relays with advantages of long life high speed switching and elimination

                                of magnetic field

                                713 MICROCONTROLLER IC (89V51 RD 2 )

                                713 WORKING

                                The P89V51RD2 is an 80C51 microcontroller with 64

                                kB Flash and 1024 bytes of data RAM

                                A key feature of the P89V51RD2 is its X2 mode option

                                The design engineer can choose to run the application with the conventional 80C51 clock

                                rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                achieve twice the throughput at the same clock frequency Another way to benefit from this

                                feature is to keep the same performance by reducing the clock frequency by half thus

                                dramatically reducing the EMI

                                The Flash program memory supports both parallel programming and in serial In-

                                System Programming (ISP) Parallel programming mode offers gang-programming at high

                                speed reducing programming costs and time to market ISP allows a device to be

                                reprogrammed in the end product under software control The capability to fieldupdate the

                                application firmware makes a wide range of applications possible The P89V51RD2 is also

                                In-Application Programmable (IAP) allowing the Flash program memory to be

                                reconfigured even while the application is running

                                714 RELIMATE CONNECTOR

                                7141 WORKING

                                These are wire to board type connectors used to facilitate

                                proper and firm electrical connection between the relay card and

                                microcontroller card

                                The connector has following specifications

                                No of Ways 2-20

                                Voltage Rating 250V AC DC

                                Current Rating 3A AC DC

                                Contact Resistance 20mW max

                                Insulation Resistance 1000MW min

                                Dielectric Withstanding 1000V ACminute

                                Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                conflicts

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                715 RS-232 PORT CONNECTOR

                                7151 WORKING

                                Almost all digital devices which we use require either TTL

                                or CMOS logic levels Therefore the first step to connecting a

                                device to the RS-232 port is to transform the RS-232 levels back

                                into 0 and 5 Volts This is done by RS-232 Level Converters

                                Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                problem in many instances where only a single supply of +5V is present

                                CHAPTER 8

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                IMPLIMENTATION

                                OF THE PCB

                                Components layout designing

                                Developing or Etching the PCB

                                Other operations like Drilling Cutting Tinning

                                81 IMPLIMENTATION OF THE PCB

                                A proper PCB ensure that various circuit components are interconnected as per the

                                circuit diagram once they have been placed on the PCB in their proper positions and

                                subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                base material to which is permanently attached a flat metallic network of conducting path

                                whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                for this project is single one

                                The basic material used may be resin coated paper fiber glass ceramic and the flat

                                board configuration however is most widely used and it may be of the nature of the single

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                which ensures adequate and permanent low resistance coupling

                                811 BOARD DESIGN

                                PCB designed is the most important and requires great care during work In this case

                                great care must be taken while tracing the circuit or layout on the board Because once PCB

                                is designed it is virtually impossible to alter it While designing a circuit designer should

                                take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                also help to solve this problem when circuit is complicated

                                812 THE MASTER DIAGRAM

                                The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                which is commonly made twice as the finished circuit since this makes the working on that

                                much easier especially when circuit is complicated photography eventually reduces the

                                size of diagram to that of the circuit before proceeding we must know some rules regarding

                                the designing -

                                a The space between the conductors must be strictly controlled to avoid the possibility

                                of electrical discharges or unwanted capacitance The amount by which the mater

                                diagram is to reduce in size is thus a critical deign feature

                                b The conductor must be wider in those part of the circuits that are going to handle

                                large current must be handle without undue temperature of conductors

                                c The minimum width of copper should not generally be less than about 15mmThis

                                is related to mechanical strength rather than electrical properties and it also ensure

                                that strips remains securely bounded to the base material

                                d The points where the component holes for component lead wire occurs must be sited

                                to suit the dimensions of the component and dimensions between lead-out wire so

                                that the components can be situated correctly on finished board The conductor is

                                also main large at the point of holes

                                813 PCB MAKING

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                When the mater diagram probable twice the size of real PCB has been evolved the

                                test major step consists of etching or dissolving the unwanted metal from copper claded

                                board to create a circuit as depicted by master diagram It must be stressed that very

                                accurate checking master is essential at this stage Then the master point is mounted on a

                                special frame on easy facing of a larger camera and with the aid of the very powerful

                                illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                brought into operation This comprises the camera body mounted so that sideways after

                                each exposure In this way number of copies of the original master diagram is set out

                                exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                In case of simple and need of number of less PCB economic and advisable to use the

                                following lab method of PCB making

                                Planning The Circuit

                                It is not a particular difficult There are several important factors that need not be

                                taken into account if the finished device is to work properly we must consider gain factor

                                and ensure that the input and output parts are sufficiently well isolated to avoid the

                                possibility We must also ensure that conductors and components carrying high frequency

                                current are well separated from the part of the circuit We are also to make sure that all

                                components need to return to earth are properly connected and that possibility of common

                                impedance arising earth returned

                                Circuit is totally eliminated by making all earth as substantial possible consistent

                                with nature of design Other factors that have to successfully studied include availability of

                                adequate return points on board and itrsquos mounting from accessibility of switch connection

                                made for mechanical fixing ventilation effect of vibration

                                Cleaning The Board

                                The copper side of the board must be thoroughly cleaned before circuit plan is

                                transferred to it This is important because even slightest trace of graze (from figure of

                                instance) will impure the etching process and when the circuit plan has been neatly

                                transferred to copper in this manner the board is held under running tap and the allowed to

                                dry before resist is applied

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Transforming the Plan

                                Now once cleaning is done plan has to transfer on copper surface of PCB material

                                A convenient way to do this is simply put the carbon paper between a copper surface of the

                                board and working plan and carefully trace the lines of original plan with a ball pen

                                Resist

                                Resist is nothing more than a substrate that is unaffected by presence etching

                                chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                covered when resists the leaguer type of paints possess good resist properties but

                                disadvantage of relatively long time taken for drying It is essential to resist through

                                hardening before etching is started Nail polished are better as they quickly and are less

                                difficult to remove

                                To overcome this drying effect and to achieve the sharp edge of the trace on the

                                PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                short circulating due to paints are completely the avoid etching tapes and pads are available

                                in different sizes

                                Correcting Error

                                When a result has been thoroughly hardened any errors that have been made can

                                usually be corrected by gently scratching away with knife To ensure clear out lines round

                                edges of copper conductors on board the resist must be applied with steady band

                                Etching

                                Next comes etching of unwanted copper amp whether a small single is all that is

                                required as quantity of board to be produce certain precautions must be taken before

                                operation is commenced the most used etch amp I ferrite chloride to this is added small

                                quantity of HCL to accelerate But not critical as lab construction concerned A good

                                etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                grams of water

                                Agitation

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                temperature and thickness of copper foil

                                Finishing Off

                                When all unwanted copper is dissolved from areas between conductor board should

                                be taken from an etchant amp washed in water The resist must be removed using proper

                                solvent After this the copper surface must be polished with any kind of cleaner It should be

                                seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                This process is called Tinning This process of coating involve track with soldier

                                Advantage of tinning the effect of environment of conductors then PCB is drilled

                                ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                Assembling On PCB

                                After the holes are drilled the component have to be assembled on PCB before

                                assembling the components it is necessary to clean soldering iron in order to get easy amp

                                accurate soldering Removing impurity particles that are gathered on iron bit due to

                                repetitive use cleans soldering iron

                                CHAPTER 9

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                SOLDERING

                                TECHNIQUE

                                Technique for good soldering

                                91 SOLDERING TECHNIQUE

                                For soldering of any joints first the terminal to be soldered are cleaned to remove

                                oxide film or dirt on it If required flux is applied on the points to be soldered

                                Now the joint to be soldered is heated with the help of soldering iron Heat

                                applied should be such that when solder wire is touched to joint it must melt

                                quickly

                                The joint and the soldering iron is held such that molten solder should flow

                                smoothly over the joint

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                When joint is completely covered with molten solder the soldering iron is re-

                                moved

                                The joint is allowed to cool without any movement

                                The bright shining solder indicates good soldering

                                In case of dry solder joint a air gap remains in between the solder material and

                                the joint It means that soldering is improper This is removed and again solder-

                                ing is done

                                Thus this way all the components are soldered on P C B

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 10

                                PCB LAYOUTS

                                Schematic diagram

                                Bottom and top layout

                                101 POWER SUPPLY CARD

                                1011 SCHIMETIC DIAGRAM

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1012 LEGEND MARKING

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                Fig1011 Schematic diagram of power supply card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1013TOP LAYER

                                1014 BOTTOM LAYER

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                Fig1013 Top layer of power supply

                                card

                                Fig1014 Schematic diagram of power supply card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                102 BATTERY CHARGER CARD

                                1021 SCHEMATIC DIAGRAM

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                Fig1021 Schematic diagram of battery charger card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                103 RELAY CARD

                                1031 SCHIMETIC DIAGRAM

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                Fig1031 Schematic diagram of Relay card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1032 RELAY CARD LEGEND MARKING

                                1033 TOP LAYER

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                Fig1032 Legend marking of Relay card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1034 BOTTOM LAYER

                                104 MICROCONTROLER CARD

                                1041 SCHIMETIC DIAGRAM

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                Fig1034 Bottom layer of Relay card

                                Fig1041 Schematic diagram of microcontroller card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1042 ALL LAYERS

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                Fig1042 All layer of microcontroller card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 11

                                INTRODUCTION

                                OF SOFTWARE

                                Keil (microVision 2)

                                Eagle (Easily Applicable Graphical Layout Editor)

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                111 Keil (microVision 2)

                                1111 Introduction to C51 Cross Compiler

                                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                generates object code that matches the efficiency and speed of assembly programming

                                Using a high-level language like C has many advantages over assembly language

                                programming

                                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                the memory structure of the 8051 CPU is desirable (but not necessary)

                                Details like register allocation and addressing of the various memory types and data

                                types is managed by the compiler

                                Programs get a formal structure (which is imposed by the C programming language) and

                                can be divided into separate functions This contributes to source code reusability as

                                well as better overall application structure

                                The ability to combine variable selection with specific operations improves program

                                readability

                                Keywords and operational functions that more nearly resemble the human thought

                                process may be used

                                Programming and program test time is drastically reduced

                                The C run-time library contains many standard routines such as formatted output

                                numeric conversions and floating-point arithmetic

                                Existing program parts can be more easily included into new programs because of

                                modular program construction techniques

                                The language C is a very portable language (based on the ANSI standard) that enjoys

                                wide popular support and is easily obtained for most systems Existing program

                                investments can be quickly adapted to other processors as needed

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1112 Software Development Cycle in Keil

                                When we use the Keil Software tools the

                                project development cycle is roughly the same as

                                it is for any other software development project

                                1 Create a project select the target chip from the

                                device database and configure the tool settings

                                2 Create source files in C or assembly

                                3 Build your application with the project

                                manager

                                4 Correct errors in source files

                                5 Test the linked application A block diagram of

                                the complete 8051 tool set may best illustrate the

                                development cycle

                                112 Eagle (Easily Applicable Graphical Layout Editor)

                                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                1121 Schematic Editor

                                In this one can develop amp design circuits for the required PCB

                                1122 Layout Editor

                                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                Fig 111 Software development in KEIL

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1123 Library Editor

                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                1124 Auto Router

                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                the PCB tracks designed

                                1125 Cam Processor

                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                Bottom Layer Component Layer Masking Layer etc

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                Start

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 12

                                INTRODUCTION

                                OF

                                PROGRAMMING

                                Flowchart of programming

                                Program code

                                121 Flowchart

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                2

                                flag9==1

                                flag9=1

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                flag11==1

                                flag11=1 flag11=0 flag4=0

                                REady_LED4=0

                                Sw2_op (P01) ==0

                                My delay (10)

                                3 3

                                flag2=1 disp2=1 k2=0

                                3

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                4

                                flag11==1

                                flag11=0 flag4=0 REady_LED4=0

                                flag11=1

                                My delay (10)

                                flag3=1 disp3=1 k3=0

                                k1==0||k2==0||k4==0

                                Sw3_op (P02) ==0

                                5

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                flag5==1

                                5

                                flag11==1

                                flag7=1

                                flag7==1

                                flag7=0 flag2=0 REady_LED2=0

                                6

                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                flag11=0 flag4=0 REady_LED4=0

                                flag11=1

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                6

                                My delay (10)

                                flag4=1 disp4=1 k4=0

                                k1==0||k2==0||k3==0 flag5==1

                                7

                                Sw4_op (P03) ==0

                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                7

                                flag7==1

                                flag9==1

                                flag7=1

                                flag7=0 flag2=0 REady_LED2=0

                                flag9=0 flag3=0 REady_LED3=0

                                flag9=1

                                Sw5_op A(P04) ==0

                                My delay (10)

                                8

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                9

                                flag2==1

                                flag3==1

                                8

                                flag1==1

                                flag4==1 flag5=1 disp5=1

                                flag9=1 disp5=1

                                flag7=1 disp5=1

                                flag11=1 disp5=1

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                Sw6_op (P05) ==0

                                My delay (10)

                                flag2==1 ampamp flag7==1

                                flag3==1 ampamp flag9==1 9

                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                flag8=1 disp6=1

                                10

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                10

                                flag4==1 ampamp flag11==1

                                flag10=1 disp6=1

                                flag12=1 disp6=1

                                flag8==1

                                flag10==1

                                11

                                flag6==1

                                i++

                                l++

                                j++

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                flag12==1

                                M++

                                11

                                Stop

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                122 Program

                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                define buzzerP2_0 buzzer indication

                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                sbit sw5_op=P0^4 input switch5 for coin

                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                output Led for indication

                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                function prototype declaration

                                void my_delay(unsigned int value) DELAY FUCTION

                                void init_timer() timer 0 initialization function

                                variable declaration

                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                start of main programme

                                void main()

                                init_timer() call it timer initialization function

                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                start of while loop

                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                condition for switch1

                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                if(iltk) loop will repeat for desired time of charging

                                if(igt=1000)

                                buzzer=1 turn on buzzer if (ii==20)

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                REady_LED1=1 turn on ready indication of led1

                                else if(ii==40)

                                REady_LED1=0ii=0

                                elseREady_LED1=0

                                START_LED1=1

                                else

                                START_LED1=0

                                k1=1 buzzer=0

                                REady_LED1=0 flag1=0

                                flag5=0flag6=0

                                condition for switch2

                                if(flag2==1) check swich2 pressed if(disp2==1)

                                REady_LED2=1 turn on ready 2 led indication

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                disp2=0

                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                if(jltk)

                                if(jgt1000) buzzer=1 if(jj==20)

                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                elseREady_LED2=0

                                START_LED2=1

                                else START_LED2=0

                                REady_LED2=0 k2=1 buzzer=0

                                flag2=0flag7=0flag8=0

                                j=0jj=0

                                condition for switch 3

                                if(flag3==1) check swich3 pressed

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                if(disp3==1 )

                                REady_LED3=1 disp3=0

                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                if(lltk)

                                if(lgt1000) buzzer=1 if(ll==20)

                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                elseREady_LED3=0

                                START_LED3=1

                                else START_LED3=0

                                LED2=0 k3=1 buzzer=0

                                REady_LED3=0 flag3=0

                                flag9=0flag10=0

                                l=0ll=0

                                condition for switch 4

                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                REady_LED4=1 disp4=0

                                if(flag11==1) check coin is pressed

                                if(flag12==1) START is pressed

                                if(mltk)

                                if(mgt1000)

                                buzzer=1 if(mm==20)

                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                elseREady_LED4=0

                                START_LED4=1

                                else START_LED4=0

                                buzzer=0 k4=1

                                REady_LED4=0 flag4=0

                                flag11=0flag12=0

                                m=0mm=0

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                while(1)

                                end of main programme

                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                whenever specific time the interrupt will generate control will go in following function

                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if(sw1_op==0 ) ready switch flag for system1

                                my_delay(10) CALL DELAY FUNCTION

                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                if(flag7==1) SET THE FLAG

                                flag7=1

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                flag9=1

                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                flag11=1

                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if(sw2_op==0 ) fready switch flag for system2

                                my_delay (10)

                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                if(flag5==1)

                                flag5=1

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                flag9=1

                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                flag11=1

                                elseflag11=0flag4=0REady_LED4=0

                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                if(flag7==1)

                                flag7=1

                                else

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                flag5=1

                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                flag11=1

                                elseflag11=0flag4=0REady_LED4=0

                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                if(flag7==1)

                                flag7=1

                                elseflag7=0

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                flag2=0REady_LED2=0 if(flag5==1)

                                flag5=1

                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                flag9=1

                                elseflag9=0flag3=0REady_LED3=0

                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                if(flag6==1)

                                i++ if (igt1000) ii++

                                if (flag8==1)

                                j++ if(jgt1000) jj++

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                if (flag10==1)

                                l++ if (lgt1000) ll++

                                if (flag12==1)

                                m++ if (mgt1000) mm++

                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 13

                                TROUBLE SHOOT

                                Troubleshoot

                                131 TROUBLE SHOOT

                                A newly assembled circuit does not work may be due to -

                                Faulty components

                                Improper soldering

                                Wrong connections

                                Also any stop in working after some period may be due to -

                                Component failure

                                Supply failure

                                Damaging of PCB

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Fault finding is very essential if you want the circuit to operate properly

                                If a newly assembled circuit is not working properly check all the components and

                                circuit connections according to the diagram The circuit may not be working due to wrong

                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                proper soldering

                                If faults are not observed during physical observations one should proceed for Hot

                                test ie Voltage measurement at different points for example at Input terminal etc

                                Resistance measurement is also done which is known as Dry test

                                During this project work some green LEDs was not glow then we checked it

                                continuity and replace it

                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                heated after starting the project It happens because of some soldering points are shorted

                                during soldering PCB We solved that problem

                                CHAPTER 14

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                ADVANTAGES OF

                                THE PROJECT

                                Advantages

                                141 ADVANTAGES OF THE PROJECT

                                Simple and hand efficient Microcontroller based system

                                Fast charging capacity

                                Simple to operate

                                Ease of mobility

                                Facilitates connectivity for 90 of cellular phones

                                Less expensive

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Reduced man power

                                Low power consumption

                                It can offer emergency charging for 4sets of handsets synchronously

                                CHAPTER 15

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                DISADVANTAGES

                                OF THE PROJECT

                                Disadvantages

                                151 DISADVANTAGES OF THE PROJECT

                                It requires mains supply to work project

                                Due to limited charging channels till now there may be a possibility that

                                mobile phones of few brands cannot be connected for charging For this

                                purpose we have to use separate connectors for that specific brand differently

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                min

                                It does not have battery backup therefore it cannot be portable

                                CHAPTER 16

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                APPLICATIONS OF

                                THE PROJECT

                                Application

                                161 APPLICATIONS OF THE PROJECT

                                The coin based mobile phone charger is very useful to public for using coin to

                                charge for the mobile phone in any places

                                It is used for emergency charging purposes

                                It can be installed in malls railway stations bus stops and other public

                                places

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                The charger offers a unique revenue opportunity for a vast range of

                                businesses - from airports to pubs from universities to health clubs virtually

                                any location where there is a high footfall creating a large number of

                                potential users

                                It can be installed in offices and collages for pay charging facility

                                CHAPTER 17

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                FUTURE

                                DEVELOPMENT OF

                                THE PROJECT

                                FUTURE DEVELOPMENT OF THE PROJECT

                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                This project is very useful to people who are using mobile phone without charging

                                condition in public places

                                It will use with a stereo advertisement carrier that can display video advertisement

                                It will provide battery backup for make it portable

                                It will also provide SMS system in future

                                We can also increase the charging time by editing software of the project

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 18

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                COST ANALYSIS

                                OF THE PROJECT

                                COST ANALYSIS OF THE PROJECT

                                181 COST ANALYSIS OF THE PROJECT

                                1811 Component list for power supply card

                                Footprint Quantity Designators Rate

                                Resistor

                                22K 1 R2 1

                                1K 1 R1 1

                                Capacitor

                                1000uf25V 1 C5 10

                                2200uf25V 1 C1 10

                                022uf 2 C6 C2 1

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                Table 1811 Component list for power supply card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                01uf 2 C4 C3 1

                                IC

                                BRIDGE W10 2 BR2 BR1 10

                                L7812CV (TO-220) 1 U2 8

                                L7805CV (TO-220) 1 U1 8

                                Connector

                                CON PHO 2PIN 2 J3 J2 16

                                CON PHO 3PIN 1 J1 12

                                LED3mm red 2 L1 L2 15

                                Heat sink (TO-220) 2 16

                                Total 955

                                1812 Component list for battery charger card

                                Footprint Quantity Rate

                                Capacitor

                                2200uf25V 1 1000

                                022uf 4 100

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                01uf 4 100

                                IC

                                BRIDGE W10 1 500

                                L7805CV (TO-220) 4 3200

                                Connector

                                CON PHO 2PIN 1 800

                                Relimate 2 pin 1 400

                                relimate 3 pin 4 2000

                                Heat sink (TO-220) 4 1200

                                TOTAL 9300

                                1813 Component list for Relay card

                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                Table 1812Component list for battery charger card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                Total 18900

                                1814Component list for controller card

                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                Table 1813Component list for relay card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                total 27000

                                1815 Miscellaneous material

                                Material Quantity Rate

                                electronic item

                                Transformer

                                TXR1 0-9-15 1 20000

                                0-9 1A

                                0-15 100mA

                                TXR2 0-9 1 16500

                                0-9 1A

                                Proximity switch 1 20000

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                Table 1814Component list for microcontroller card

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Red push bottom 4 4000

                                Green push button 1 1000

                                Red led 5mm 4 800

                                Green led 5mm 4 800

                                Led holder 8 1600

                                Copper clad 2 4000

                                3 core cable 1 meter 1500

                                3 pin plug 1 3000

                                2 pin relimate wire 19 9000

                                3 pin relimate wire 5 3750

                                4 pin relimate wire 2 2000

                                mechanical items

                                Enclosure 1 25000

                                Acrylic sheet 2 X 1 30000

                                12mm cable gland 1 1000

                                Screw 3mm 33 2000

                                Screw 35mm 6 2400

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                10 mm spacers 100 1500

                                10mm insert to stud 50 10000

                                cable tie 2500

                                Total 162350

                                CHAPTER 19

                                APPENDIX

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                Table 1815Component list for miscellaneous material

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                APPENDIX

                                191 APPENDIX

                                1911 78xx IC datasheet

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1912 W10 datasheet

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1913 4n33 IC datasheet

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                1914 MAX 232

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1915 ULN2003a IC datasheet

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                1916 89V51RD2 IC datasheet

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 20

                                CONCLUSION

                                CONCLUSION

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                201 CONCLUSION

                                The coin-operated mobile phone charger is already successfully installed in

                                hundreds of locations worldwide providing a unique service to the public and a source of

                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                installed in any business premises

                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                from airports to pubs from universities to health clubs virtually any location where there is

                                a high footfall creating a large number of potential users

                                The charger can charge up to 4 different mobile phones simultaneously It will

                                extend low mobile phone talk time provide battery charging

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 21

                                IMAGES OF THE

                                PROJECT

                                Images of the project

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                211 IMAGES OF THE PROJECT

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                fig211 lsquoCoin operated mobile battery charger

                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Fig 216 Relay driver circuit

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                Fig 213 Constant voltage battery charger circuit

                                Fig214 Power supply circuit

                                Fig215 Metal detector proximity switch

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Fig217 Microcontroller circuit

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                Fig228 coin operated mobile battery charger project presentation

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                CHAPTER 22

                                BIBILOGRAPHY

                                BIBLIOGRAPHY

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                221 BIBLIOGRAPHY

                                BOOKS

                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                INTERNET LINKS

                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                • CHAPTER 1

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  In the case of IC 7812 the unregulated DC voltage is applied to Pin 1 and

                                  the output is taken at Pin 3 and Pin 2 is grounded The pair of capacitors of 10microF is

                                  connected at the output as shown in figure to eliminate the voltage oscillations at the

                                  output due to the large voltage oscillations at the input of the regulator

                                  52 CONSTANT VOLTAGE CHARGER

                                  521 CIRCUIT DIAGRAM

                                  Fig 53 Circuit diagram of the battery charger

                                  522 CIRCUIT DIAGRAM EXPLANATION

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 17

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Constant-voltage (often called constant-potential) chargers maintain nearly the same

                                  voltage input to the battery throughout the charging process regardless of the batterys state

                                  of charge Constant-voltage chargers provide a high initial current to the battery because of

                                  the greater potential difference between the battery and charger

                                  A constant-voltage charger may return as much as 70 of the previous discharge in

                                  the first 30 minutes This proves useful in many battery applications involving multiple

                                  discharge scenarios As the battery charges its voltage increases quickly This reduces the

                                  potential that has been driving the current with a corresponding rapid decrease in charge

                                  current as depicted in the illustration below As a result even though the battery reaches

                                  partial charge quickly obtaining a full charge requires prolonged charging

                                  Given this behavior constant-voltage chargers are frequently found in applications

                                  that normally allow extended charging periods to attain full charge Constant-voltage

                                  chargers should not be used where there is frequent cycling of the battery Repeated

                                  discharges without returning the cell to its full charge will eventually decrease the battery

                                  capacity and may damage individual cells

                                  Fig 54An Illustration graph of the charging function of constant battery charger

                                  Constant-voltage chargers are most often used in two very different modes as a fast

                                  charger to restore a high percentage of charge in a short time or as a float charger to

                                  minimize the effects of overcharge on batteries having infrequent discharges

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  53 RELAY DRIVER CIRCUIT

                                  531 CIRCUIT DIAGRAM

                                  532 CIRCUIT DIAGRAM EXPLANATION

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                                  Fig 55 Relay driver circuit

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Input from the controller is connected to the relay card through connector J1 which

                                  carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                                  pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                                  These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                                  relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                                  series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                                  and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                                  relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                                  NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                                  3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                                  RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                                  is used to connect power supply to relay card

                                  533 WORKING

                                  While taking Relay1 (RL1) into consideration we will discuss the working of relay

                                  card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                                  of the IC are in cut off region which causes an open circuit so there is no current flow

                                  flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                                  applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                                  completes the path ie provide ground to the relay coil so the current flows through the

                                  LED activating the relay

                                  As the current flows through the relay coil it gets energized and switch over the

                                  contacts ie common and normally open contact get connected and provide a path to flow

                                  current from J11 ie charger into the load connected at J4 hence the cell phone charging

                                  process starts The same above process is applies for all relays If LED is fused or

                                  damaged the path will be open and relay will not be energized and if relay is damaged the

                                  led will not be illuminated So the LED here is used as a FAULT indicator and a

                                  CHARGING ON indicator

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  54 MICROCONTORLLER CIRCUIT

                                  541 CIRCUIT DIAGRAM

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  542 CIRCUIT DIAGRAM EXPLANATION

                                  CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                  the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                  port P04 through J4 and START switch is connected to port P05 through SW5

                                  Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                  P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                  Output for relay card is taken on port P14 to P17

                                  Components C1 R1 and push button S1 forms reset circuit which provides a power

                                  on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                  110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                  22pf capacitor used as loading capacitor for crystal

                                  Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                  RN2 resistance network

                                  IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                  the proximity switch and microcontroller and convert its output readable to microcontroller

                                  IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                  communication between PC and a microcontroller through connector J3

                                  Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                  communication process

                                  Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                  power supply connection

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                  P00 = switch1 for channel 1

                                  P01 = switch2 for channel 2

                                  P02 = switch3 for channel 3

                                  P03 = switch4 for channel 4

                                  P04 = switch5 for coin input sensor (proximity switch)

                                  P05 = switch6 for start charging

                                  P10 = channel 1 red LED1 (ready system)

                                  P11 = channel 2 red LED2 (ready system2)

                                  P12 = channel 3 red LED3 (ready system3)

                                  P13 = channel 4 red LED4 (ready system4)

                                  P14 = channel 1 relay (start system1)

                                  P15 = channel 2 relay (start system2)

                                  P16 = channel 3 relay (start system3)

                                  P17 = channel 4 relay (start system4)

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 6

                                  LIST OF THE

                                  COMPONENTS

                                  List of the components

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  61 LIST OF THE COMPONETS

                                  RESISTORS

                                  CAPACITORS

                                  LIGHT EMITING DIODES (LEDS)- Green Red

                                  RELAYrsquoS-

                                  TRANSFORMERS

                                  RECTIFIER BRIDGES (W 10)

                                  OSCILLATOR

                                  SWITCHES- Push switches

                                  DARLINGTON PAIR IC (ULN2003a)

                                  SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                  SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                  OPTOCOUPLER IC (4N33)

                                  MICROCONTROLLER IC (89V51 RD2)

                                  RELIMATE CONNECTOR- 2 pin amp 4 pin

                                  RS-232 PORT CONNECTOR

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 7

                                  INTRODUCTION

                                  OF COMPONENTS

                                  Working of components

                                  Features or Uses of components

                                  Testing of components

                                  71 RESISTOR

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  711 WORKING

                                  Resistors limit current Resistors are considered to be the most used and the most

                                  important component of all the electronic circuits Resistors resist the flow of electrical

                                  current The higher the value of resistance (measured in ohms)

                                  the lower the current will be

                                  712 TESTING

                                  Read the indicated color code value then select the OHM-scale within but not way

                                  below the indicated value A resistor is good if its resistance is close to the indicated

                                  Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                  all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                  ohmmeter scale settings resistor is shorted

                                  713 SPECIFICATIONS

                                  To completely specify a resistors characteristics requires knowledge of the following

                                  parameters-

                                  bull Value

                                  bull Tolerance

                                  bull Temperature Coefficient

                                  bull Power Rating

                                  The specification of a resistor may be marked on its surface using either of two

                                  systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                  the second more recent system uses a combination of alpha-numeric characters

                                  7 2 CAPACITOR

                                  721 WORKING

                                  When DC voltage is applied to the capacitor an electric charge is stored on each

                                  electrode While the capacitor is charging up current flows The current will stop flowing

                                  when the capacitor has fully charged Capacitors find use

                                  in circuits for a variety of purposes They are used in

                                  time delay generation RC circuits In power supplies for filtering and power supply

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  decoupling as blocking capacitors for power factor correction and motor starting in LC

                                  tank circuits and so on

                                  722 TESTING

                                  To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                  negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                  A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                  and moves back again to infinite resistance position A defective indication for an

                                  electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                  which is an indication that the capacitor is shorted

                                  73 LIGHT EMITING DIODE (LED)

                                  731 WORKING

                                  LEDs are special diodes that emit light when

                                  connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                  indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                  the heart of an LED the semi-conductor chip

                                  In our project Green LED are used here for mainly two purpose

                                  a Charging ON indication (when ON)

                                  b Channel fault indication (always OFF)

                                  732 TESTING

                                  The good and working LED will then light up or glow a busted LED will not LEDs

                                  must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                  1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                  directly connected to a battery or power supply It will be destroyed the LED

                                  733 FEATURES

                                  Single color

                                  High bright output

                                  Low power consumption

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  High reliability and long life

                                  734 Descriptions

                                  Dice material GaInN

                                  Emitting Color Super Bright White

                                  Device Outlineφ5mm Round Type

                                  Lens Type Water Clear

                                  74 RELAY

                                  741 WORKING

                                  A relay is an electrically operated switch Current

                                  flowing through the coil of the relay creates a magnetic field

                                  which attracts a lever and changes the switch contacts The coil

                                  current can be on or off so relays have two switch positions and

                                  most have double throw (changeover) switch contacts

                                  Relays are like remote control switches and are used in

                                  many applications because of their relative simplicity long life

                                  and proven high reliability

                                  742 USES

                                  The main operation of a relay comes in places where only a low-power signal can be

                                  used to control a circuit

                                  It is also used in places where only one signal can be used to control a lot of circuits

                                  The application of relays started during the invention of telephones They played an

                                  important role in switching calls in telephone exchanges They were also used in

                                  long distance telegraphy They were used to switch the signal coming from one

                                  source to another destination

                                  743 TESTING

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  A relay will usually have a coil pole terminal and a set of

                                  contacts The set of contacts that are open when the relay is not

                                  energized are called normally open (NO) contacts and the set of

                                  contacts that are closed when the relay is not energized are called

                                  normally closed (NC) contacts The following steps can be used to perform the testing of

                                  the relay using a multimeter

                                  Keep the multimeter in the continuity check mode

                                  Check for continuity between the NC contacts and pole

                                  Check for discontinuity between NO contacts and the pole

                                  Now energies the relay using the rated voltage For example use a 9V battery for

                                  energizing a 9V relay The relay will engage with clicking sound

                                  Now check for continuity between NO contacts and pole

                                  Also check for discontinuity between NC contacts and pole

                                  As a final test measure the resistance of the relay coil using a multimeter and check

                                  whether it is matching to the value stated by the manufacturer

                                  If all the above tests are positive we can conclude that the relay is healthy

                                  75 TRANSFORMER

                                  751 WORKING

                                  A transformer is a device that transfers electrical energy

                                  from one circuit to another through inductively coupled

                                  electrical conductors A changing current in the first circuit (the

                                  primary) creates a changing magnetic field

                                  This changing magnetic field induces a changing voltage in the second circuit (the

                                  secondary) This effect is called mutual induction

                                  If a load is connected to the secondary circuit electric charge will flow in the

                                  secondary winding of the transformer and transfer energy from the primary circuit to the

                                  load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                  of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                  number of primary turns

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  By appropriate selection of the numbers of turns a transformer thus allows an

                                  alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                  making it less

                                  752 TESTING

                                  1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                  scale and then adjusting the knob to verify its reading is an easy step to the

                                  reading of the ohm

                                  2 To check the resistance of the coil unplug or unsolder the leads of the

                                  transformer from its circuit and measure the resistance of each coil

                                  3 The next step is to test each coil for shorts to other coils

                                  76 RECTIFIER BRIDGE (W 10)

                                  761 WORKING

                                  A diode bridge rectifier is a device for converting AC or

                                  alternating current electricity into DC or direct current AC

                                  electricity goes from positive to negative constantly whereas DC

                                  always flows in the same direction

                                  AC electricity is more efficient to transmit and easier to

                                  convert into different voltages However most appliances need DC current to run A diode

                                  bridge rectifier is the most common type of power supply used to provide this current In

                                  our project W10 is a bridge rectifier which provides on single semiconductor chip

                                  77 OSCILLATOR

                                  771 Working

                                  An oscillator puts out an endless series of pulses The output

                                  constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  all digital circuits have some type of oscillator This stream of output pulses is often

                                  called a clock One of the most important features of any oscillator is its frequency stability

                                  or in other words its ability to provide a constant frequency output under varying load

                                  conditions Some of the factors that affect the frequency stability of an oscillator include

                                  temperature variations in the load and changes in the DC power supply Frequency stability

                                  of the output signal can be improved by the proper selection of the components used for the

                                  resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                  be obtained from normal LC and RC tank circuits

                                  In our project instead of 12MHz crystal 110592MHz is used because it can be

                                  divided to give you exact clock rates for most of the common baud rates for the UART

                                  especially for the higher speeds (9600 19200) These crystals are readily available and

                                  commonly used

                                  78 SWITCH

                                  781 WORKING

                                  The most familiar form of switch is a manually operated

                                  electromechanical device with one or more sets of electrical contacts

                                  Each set of contacts can be in one of two states either closed meaning

                                  the contacts are touching and electricity can flow between them or

                                  open meaning the contacts are separated and the switch is non

                                  conducting The mechanism actuating the transition between these two

                                  states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                  momentary (push-for on or push-for off) type

                                  782 USES

                                  In electronics a switch is an electrical component that can break an electrical

                                  circuit interrupting the current or diverting it from one conductor to another

                                  783 TESTING

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                  no connection Switch can tested by using multimeter in continuity range

                                  79 DARLINGTON PAIR IC (ULN2003a)

                                  791 WORKING

                                  The Darlington transistor (often called a Darlington pair) is a

                                  compound structure consisting of two bipolar transistors (either

                                  integrated or separated devices) connected in such a way that the

                                  current amplified by the first transistor is amplified further by the

                                  second one This configuration gives a much higher current gain than

                                  each transistor taken separately and in the case of integrated devices

                                  can take less space than two individual transistors because they can

                                  use a shared collector

                                  Integrated Darlington pairs come packaged singly in

                                  transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                  The Darlington transistor array used is ULN2003 Applications include relay

                                  drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                  drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                  to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                  for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                  792 FEATURES

                                  The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                  transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                  with common-cathode clamp diodes for switching inductive loads The collector-current

                                  rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                  higher current capability

                                  710 SERIES VOLTAGE REGULATER IC (78XX)

                                  7101 WORKING

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Voltage Regulator (regulator) usually having three legs converts varying input

                                  voltage and produces a constant regulated output voltage They are available in a variety of

                                  outputs

                                  The most common part numbers start with the numbers 78 or 79 and finish with two

                                  digits indicating the output voltage The number 78 represents positive voltage and 79

                                  negative one The 78XX series of voltage regulators are designed for positive input

                                  The LM78XX series typically has the ability to drive current up to 1A For

                                  application requirements up to 150mA 78LXX can be used As mentioned above the

                                  component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                  an output leg with the regulators voltage

                                  As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                  voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                  difference between the input and output appears as heat If the input voltage is unnecessarily

                                  high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                  sinking the regulator will shut down

                                  711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                  7111 WORKING

                                  The MAX-232 It includes a Charge Pump which generates

                                  +10V and -10V from a single 5v supply

                                  This IC also includes two receivers and two transmitters in

                                  the same package This is handy in many cases when we only want to

                                  use the Transmit and Receive data Lines We dont need to use two chips one for the

                                  receive line and one for the transmit There are also many variations of these devices The

                                  large value of capacitors are not only bulky but also expensive Therefore other devices are

                                  available which use smaller capacitors and even some with inbuilt capacitors However the

                                  MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                  Dual Charge-Pump Voltage Converter

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                  V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                  output

                                  712 OPTOCOUPLER IC (4N33)

                                  7121 WORKING

                                  In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                  photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                  between elements of a circuit typically a transmitter and a receiver while keeping them

                                  electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                  back to an electrical signal electrical contact along the path is broken

                                  Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                  essentially a combination of two distinct devices an optical transmitter typically a gallium

                                  arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                  light-triggered diac The two are separated by a transparent barrier which blocks any

                                  electrical current flow between the two but does allow the passage of light

                                  The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                  silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                  of isolation between driving and load circuits These Optocouplers can be used to replace

                                  reed and mercury relays with advantages of long life high speed switching and elimination

                                  of magnetic field

                                  713 MICROCONTROLLER IC (89V51 RD 2 )

                                  713 WORKING

                                  The P89V51RD2 is an 80C51 microcontroller with 64

                                  kB Flash and 1024 bytes of data RAM

                                  A key feature of the P89V51RD2 is its X2 mode option

                                  The design engineer can choose to run the application with the conventional 80C51 clock

                                  rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  achieve twice the throughput at the same clock frequency Another way to benefit from this

                                  feature is to keep the same performance by reducing the clock frequency by half thus

                                  dramatically reducing the EMI

                                  The Flash program memory supports both parallel programming and in serial In-

                                  System Programming (ISP) Parallel programming mode offers gang-programming at high

                                  speed reducing programming costs and time to market ISP allows a device to be

                                  reprogrammed in the end product under software control The capability to fieldupdate the

                                  application firmware makes a wide range of applications possible The P89V51RD2 is also

                                  In-Application Programmable (IAP) allowing the Flash program memory to be

                                  reconfigured even while the application is running

                                  714 RELIMATE CONNECTOR

                                  7141 WORKING

                                  These are wire to board type connectors used to facilitate

                                  proper and firm electrical connection between the relay card and

                                  microcontroller card

                                  The connector has following specifications

                                  No of Ways 2-20

                                  Voltage Rating 250V AC DC

                                  Current Rating 3A AC DC

                                  Contact Resistance 20mW max

                                  Insulation Resistance 1000MW min

                                  Dielectric Withstanding 1000V ACminute

                                  Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                  The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                  connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                  conflicts

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  715 RS-232 PORT CONNECTOR

                                  7151 WORKING

                                  Almost all digital devices which we use require either TTL

                                  or CMOS logic levels Therefore the first step to connecting a

                                  device to the RS-232 port is to transform the RS-232 levels back

                                  into 0 and 5 Volts This is done by RS-232 Level Converters

                                  Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                  Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                  The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                  problem in many instances where only a single supply of +5V is present

                                  CHAPTER 8

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  IMPLIMENTATION

                                  OF THE PCB

                                  Components layout designing

                                  Developing or Etching the PCB

                                  Other operations like Drilling Cutting Tinning

                                  81 IMPLIMENTATION OF THE PCB

                                  A proper PCB ensure that various circuit components are interconnected as per the

                                  circuit diagram once they have been placed on the PCB in their proper positions and

                                  subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                  base material to which is permanently attached a flat metallic network of conducting path

                                  whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                  for this project is single one

                                  The basic material used may be resin coated paper fiber glass ceramic and the flat

                                  board configuration however is most widely used and it may be of the nature of the single

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                  which ensures adequate and permanent low resistance coupling

                                  811 BOARD DESIGN

                                  PCB designed is the most important and requires great care during work In this case

                                  great care must be taken while tracing the circuit or layout on the board Because once PCB

                                  is designed it is virtually impossible to alter it While designing a circuit designer should

                                  take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                  unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                  also help to solve this problem when circuit is complicated

                                  812 THE MASTER DIAGRAM

                                  The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                  which is commonly made twice as the finished circuit since this makes the working on that

                                  much easier especially when circuit is complicated photography eventually reduces the

                                  size of diagram to that of the circuit before proceeding we must know some rules regarding

                                  the designing -

                                  a The space between the conductors must be strictly controlled to avoid the possibility

                                  of electrical discharges or unwanted capacitance The amount by which the mater

                                  diagram is to reduce in size is thus a critical deign feature

                                  b The conductor must be wider in those part of the circuits that are going to handle

                                  large current must be handle without undue temperature of conductors

                                  c The minimum width of copper should not generally be less than about 15mmThis

                                  is related to mechanical strength rather than electrical properties and it also ensure

                                  that strips remains securely bounded to the base material

                                  d The points where the component holes for component lead wire occurs must be sited

                                  to suit the dimensions of the component and dimensions between lead-out wire so

                                  that the components can be situated correctly on finished board The conductor is

                                  also main large at the point of holes

                                  813 PCB MAKING

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  When the mater diagram probable twice the size of real PCB has been evolved the

                                  test major step consists of etching or dissolving the unwanted metal from copper claded

                                  board to create a circuit as depicted by master diagram It must be stressed that very

                                  accurate checking master is essential at this stage Then the master point is mounted on a

                                  special frame on easy facing of a larger camera and with the aid of the very powerful

                                  illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                  developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                  brought into operation This comprises the camera body mounted so that sideways after

                                  each exposure In this way number of copies of the original master diagram is set out

                                  exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                  In case of simple and need of number of less PCB economic and advisable to use the

                                  following lab method of PCB making

                                  Planning The Circuit

                                  It is not a particular difficult There are several important factors that need not be

                                  taken into account if the finished device is to work properly we must consider gain factor

                                  and ensure that the input and output parts are sufficiently well isolated to avoid the

                                  possibility We must also ensure that conductors and components carrying high frequency

                                  current are well separated from the part of the circuit We are also to make sure that all

                                  components need to return to earth are properly connected and that possibility of common

                                  impedance arising earth returned

                                  Circuit is totally eliminated by making all earth as substantial possible consistent

                                  with nature of design Other factors that have to successfully studied include availability of

                                  adequate return points on board and itrsquos mounting from accessibility of switch connection

                                  made for mechanical fixing ventilation effect of vibration

                                  Cleaning The Board

                                  The copper side of the board must be thoroughly cleaned before circuit plan is

                                  transferred to it This is important because even slightest trace of graze (from figure of

                                  instance) will impure the etching process and when the circuit plan has been neatly

                                  transferred to copper in this manner the board is held under running tap and the allowed to

                                  dry before resist is applied

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Transforming the Plan

                                  Now once cleaning is done plan has to transfer on copper surface of PCB material

                                  A convenient way to do this is simply put the carbon paper between a copper surface of the

                                  board and working plan and carefully trace the lines of original plan with a ball pen

                                  Resist

                                  Resist is nothing more than a substrate that is unaffected by presence etching

                                  chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                  clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                  covered when resists the leaguer type of paints possess good resist properties but

                                  disadvantage of relatively long time taken for drying It is essential to resist through

                                  hardening before etching is started Nail polished are better as they quickly and are less

                                  difficult to remove

                                  To overcome this drying effect and to achieve the sharp edge of the trace on the

                                  PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                  short circulating due to paints are completely the avoid etching tapes and pads are available

                                  in different sizes

                                  Correcting Error

                                  When a result has been thoroughly hardened any errors that have been made can

                                  usually be corrected by gently scratching away with knife To ensure clear out lines round

                                  edges of copper conductors on board the resist must be applied with steady band

                                  Etching

                                  Next comes etching of unwanted copper amp whether a small single is all that is

                                  required as quantity of board to be produce certain precautions must be taken before

                                  operation is commenced the most used etch amp I ferrite chloride to this is added small

                                  quantity of HCL to accelerate But not critical as lab construction concerned A good

                                  etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                  grams of water

                                  Agitation

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                  the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                  laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                  gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                  temperature and thickness of copper foil

                                  Finishing Off

                                  When all unwanted copper is dissolved from areas between conductor board should

                                  be taken from an etchant amp washed in water The resist must be removed using proper

                                  solvent After this the copper surface must be polished with any kind of cleaner It should be

                                  seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                  PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                  This process is called Tinning This process of coating involve track with soldier

                                  Advantage of tinning the effect of environment of conductors then PCB is drilled

                                  ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                  Assembling On PCB

                                  After the holes are drilled the component have to be assembled on PCB before

                                  assembling the components it is necessary to clean soldering iron in order to get easy amp

                                  accurate soldering Removing impurity particles that are gathered on iron bit due to

                                  repetitive use cleans soldering iron

                                  CHAPTER 9

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  SOLDERING

                                  TECHNIQUE

                                  Technique for good soldering

                                  91 SOLDERING TECHNIQUE

                                  For soldering of any joints first the terminal to be soldered are cleaned to remove

                                  oxide film or dirt on it If required flux is applied on the points to be soldered

                                  Now the joint to be soldered is heated with the help of soldering iron Heat

                                  applied should be such that when solder wire is touched to joint it must melt

                                  quickly

                                  The joint and the soldering iron is held such that molten solder should flow

                                  smoothly over the joint

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  When joint is completely covered with molten solder the soldering iron is re-

                                  moved

                                  The joint is allowed to cool without any movement

                                  The bright shining solder indicates good soldering

                                  In case of dry solder joint a air gap remains in between the solder material and

                                  the joint It means that soldering is improper This is removed and again solder-

                                  ing is done

                                  Thus this way all the components are soldered on P C B

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 10

                                  PCB LAYOUTS

                                  Schematic diagram

                                  Bottom and top layout

                                  101 POWER SUPPLY CARD

                                  1011 SCHIMETIC DIAGRAM

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1012 LEGEND MARKING

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                  Fig1011 Schematic diagram of power supply card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1013TOP LAYER

                                  1014 BOTTOM LAYER

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                  Fig1013 Top layer of power supply

                                  card

                                  Fig1014 Schematic diagram of power supply card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  102 BATTERY CHARGER CARD

                                  1021 SCHEMATIC DIAGRAM

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                  Fig1021 Schematic diagram of battery charger card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  103 RELAY CARD

                                  1031 SCHIMETIC DIAGRAM

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                  Fig1031 Schematic diagram of Relay card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1032 RELAY CARD LEGEND MARKING

                                  1033 TOP LAYER

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                  Fig1032 Legend marking of Relay card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1034 BOTTOM LAYER

                                  104 MICROCONTROLER CARD

                                  1041 SCHIMETIC DIAGRAM

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                  Fig1034 Bottom layer of Relay card

                                  Fig1041 Schematic diagram of microcontroller card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1042 ALL LAYERS

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                  Fig1042 All layer of microcontroller card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 11

                                  INTRODUCTION

                                  OF SOFTWARE

                                  Keil (microVision 2)

                                  Eagle (Easily Applicable Graphical Layout Editor)

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  111 Keil (microVision 2)

                                  1111 Introduction to C51 Cross Compiler

                                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                  generates object code that matches the efficiency and speed of assembly programming

                                  Using a high-level language like C has many advantages over assembly language

                                  programming

                                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                  the memory structure of the 8051 CPU is desirable (but not necessary)

                                  Details like register allocation and addressing of the various memory types and data

                                  types is managed by the compiler

                                  Programs get a formal structure (which is imposed by the C programming language) and

                                  can be divided into separate functions This contributes to source code reusability as

                                  well as better overall application structure

                                  The ability to combine variable selection with specific operations improves program

                                  readability

                                  Keywords and operational functions that more nearly resemble the human thought

                                  process may be used

                                  Programming and program test time is drastically reduced

                                  The C run-time library contains many standard routines such as formatted output

                                  numeric conversions and floating-point arithmetic

                                  Existing program parts can be more easily included into new programs because of

                                  modular program construction techniques

                                  The language C is a very portable language (based on the ANSI standard) that enjoys

                                  wide popular support and is easily obtained for most systems Existing program

                                  investments can be quickly adapted to other processors as needed

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1112 Software Development Cycle in Keil

                                  When we use the Keil Software tools the

                                  project development cycle is roughly the same as

                                  it is for any other software development project

                                  1 Create a project select the target chip from the

                                  device database and configure the tool settings

                                  2 Create source files in C or assembly

                                  3 Build your application with the project

                                  manager

                                  4 Correct errors in source files

                                  5 Test the linked application A block diagram of

                                  the complete 8051 tool set may best illustrate the

                                  development cycle

                                  112 Eagle (Easily Applicable Graphical Layout Editor)

                                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                  1121 Schematic Editor

                                  In this one can develop amp design circuits for the required PCB

                                  1122 Layout Editor

                                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                  Fig 111 Software development in KEIL

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1123 Library Editor

                                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                  1124 Auto Router

                                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                                  the PCB tracks designed

                                  1125 Cam Processor

                                  This is used to finally print the various layers of the designed PCB viz Top Layer

                                  Bottom Layer Component Layer Masking Layer etc

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                  Start

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 12

                                  INTRODUCTION

                                  OF

                                  PROGRAMMING

                                  Flowchart of programming

                                  Program code

                                  121 Flowchart

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                  2

                                  flag9==1

                                  flag9=1

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                  flag11==1

                                  flag11=1 flag11=0 flag4=0

                                  REady_LED4=0

                                  Sw2_op (P01) ==0

                                  My delay (10)

                                  3 3

                                  flag2=1 disp2=1 k2=0

                                  3

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                  4

                                  flag11==1

                                  flag11=0 flag4=0 REady_LED4=0

                                  flag11=1

                                  My delay (10)

                                  flag3=1 disp3=1 k3=0

                                  k1==0||k2==0||k4==0

                                  Sw3_op (P02) ==0

                                  5

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                  flag5==1

                                  5

                                  flag11==1

                                  flag7=1

                                  flag7==1

                                  flag7=0 flag2=0 REady_LED2=0

                                  6

                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                  flag11=0 flag4=0 REady_LED4=0

                                  flag11=1

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                  6

                                  My delay (10)

                                  flag4=1 disp4=1 k4=0

                                  k1==0||k2==0||k3==0 flag5==1

                                  7

                                  Sw4_op (P03) ==0

                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                  7

                                  flag7==1

                                  flag9==1

                                  flag7=1

                                  flag7=0 flag2=0 REady_LED2=0

                                  flag9=0 flag3=0 REady_LED3=0

                                  flag9=1

                                  Sw5_op A(P04) ==0

                                  My delay (10)

                                  8

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                  9

                                  flag2==1

                                  flag3==1

                                  8

                                  flag1==1

                                  flag4==1 flag5=1 disp5=1

                                  flag9=1 disp5=1

                                  flag7=1 disp5=1

                                  flag11=1 disp5=1

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                  Sw6_op (P05) ==0

                                  My delay (10)

                                  flag2==1 ampamp flag7==1

                                  flag3==1 ampamp flag9==1 9

                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                  flag8=1 disp6=1

                                  10

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                  10

                                  flag4==1 ampamp flag11==1

                                  flag10=1 disp6=1

                                  flag12=1 disp6=1

                                  flag8==1

                                  flag10==1

                                  11

                                  flag6==1

                                  i++

                                  l++

                                  j++

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                  flag12==1

                                  M++

                                  11

                                  Stop

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  122 Program

                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                  define buzzerP2_0 buzzer indication

                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                  sbit sw5_op=P0^4 input switch5 for coin

                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                  output Led for indication

                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                  function prototype declaration

                                  void my_delay(unsigned int value) DELAY FUCTION

                                  void init_timer() timer 0 initialization function

                                  variable declaration

                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  start of main programme

                                  void main()

                                  init_timer() call it timer initialization function

                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                  start of while loop

                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                  condition for switch1

                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                  if(iltk) loop will repeat for desired time of charging

                                  if(igt=1000)

                                  buzzer=1 turn on buzzer if (ii==20)

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  REady_LED1=1 turn on ready indication of led1

                                  else if(ii==40)

                                  REady_LED1=0ii=0

                                  elseREady_LED1=0

                                  START_LED1=1

                                  else

                                  START_LED1=0

                                  k1=1 buzzer=0

                                  REady_LED1=0 flag1=0

                                  flag5=0flag6=0

                                  condition for switch2

                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                  REady_LED2=1 turn on ready 2 led indication

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  disp2=0

                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                  if(jltk)

                                  if(jgt1000) buzzer=1 if(jj==20)

                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                  elseREady_LED2=0

                                  START_LED2=1

                                  else START_LED2=0

                                  REady_LED2=0 k2=1 buzzer=0

                                  flag2=0flag7=0flag8=0

                                  j=0jj=0

                                  condition for switch 3

                                  if(flag3==1) check swich3 pressed

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  if(disp3==1 )

                                  REady_LED3=1 disp3=0

                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                  if(lltk)

                                  if(lgt1000) buzzer=1 if(ll==20)

                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                  elseREady_LED3=0

                                  START_LED3=1

                                  else START_LED3=0

                                  LED2=0 k3=1 buzzer=0

                                  REady_LED3=0 flag3=0

                                  flag9=0flag10=0

                                  l=0ll=0

                                  condition for switch 4

                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  REady_LED4=1 disp4=0

                                  if(flag11==1) check coin is pressed

                                  if(flag12==1) START is pressed

                                  if(mltk)

                                  if(mgt1000)

                                  buzzer=1 if(mm==20)

                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                  elseREady_LED4=0

                                  START_LED4=1

                                  else START_LED4=0

                                  buzzer=0 k4=1

                                  REady_LED4=0 flag4=0

                                  flag11=0flag12=0

                                  m=0mm=0

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  while(1)

                                  end of main programme

                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                  whenever specific time the interrupt will generate control will go in following function

                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if(sw1_op==0 ) ready switch flag for system1

                                  my_delay(10) CALL DELAY FUNCTION

                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                  if(flag7==1) SET THE FLAG

                                  flag7=1

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                  flag9=1

                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                  flag11=1

                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if(sw2_op==0 ) fready switch flag for system2

                                  my_delay (10)

                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                  if(flag5==1)

                                  flag5=1

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                  flag9=1

                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                  flag11=1

                                  elseflag11=0flag4=0REady_LED4=0

                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                  if(flag7==1)

                                  flag7=1

                                  else

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                  flag5=1

                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                  flag11=1

                                  elseflag11=0flag4=0REady_LED4=0

                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                  if(flag7==1)

                                  flag7=1

                                  elseflag7=0

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  flag2=0REady_LED2=0 if(flag5==1)

                                  flag5=1

                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                  flag9=1

                                  elseflag9=0flag3=0REady_LED3=0

                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                  if(flag6==1)

                                  i++ if (igt1000) ii++

                                  if (flag8==1)

                                  j++ if(jgt1000) jj++

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  if (flag10==1)

                                  l++ if (lgt1000) ll++

                                  if (flag12==1)

                                  m++ if (mgt1000) mm++

                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 13

                                  TROUBLE SHOOT

                                  Troubleshoot

                                  131 TROUBLE SHOOT

                                  A newly assembled circuit does not work may be due to -

                                  Faulty components

                                  Improper soldering

                                  Wrong connections

                                  Also any stop in working after some period may be due to -

                                  Component failure

                                  Supply failure

                                  Damaging of PCB

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Fault finding is very essential if you want the circuit to operate properly

                                  If a newly assembled circuit is not working properly check all the components and

                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                  proper soldering

                                  If faults are not observed during physical observations one should proceed for Hot

                                  test ie Voltage measurement at different points for example at Input terminal etc

                                  Resistance measurement is also done which is known as Dry test

                                  During this project work some green LEDs was not glow then we checked it

                                  continuity and replace it

                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                  heated after starting the project It happens because of some soldering points are shorted

                                  during soldering PCB We solved that problem

                                  CHAPTER 14

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  ADVANTAGES OF

                                  THE PROJECT

                                  Advantages

                                  141 ADVANTAGES OF THE PROJECT

                                  Simple and hand efficient Microcontroller based system

                                  Fast charging capacity

                                  Simple to operate

                                  Ease of mobility

                                  Facilitates connectivity for 90 of cellular phones

                                  Less expensive

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Reduced man power

                                  Low power consumption

                                  It can offer emergency charging for 4sets of handsets synchronously

                                  CHAPTER 15

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  DISADVANTAGES

                                  OF THE PROJECT

                                  Disadvantages

                                  151 DISADVANTAGES OF THE PROJECT

                                  It requires mains supply to work project

                                  Due to limited charging channels till now there may be a possibility that

                                  mobile phones of few brands cannot be connected for charging For this

                                  purpose we have to use separate connectors for that specific brand differently

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                  min

                                  It does not have battery backup therefore it cannot be portable

                                  CHAPTER 16

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  APPLICATIONS OF

                                  THE PROJECT

                                  Application

                                  161 APPLICATIONS OF THE PROJECT

                                  The coin based mobile phone charger is very useful to public for using coin to

                                  charge for the mobile phone in any places

                                  It is used for emergency charging purposes

                                  It can be installed in malls railway stations bus stops and other public

                                  places

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  The charger offers a unique revenue opportunity for a vast range of

                                  businesses - from airports to pubs from universities to health clubs virtually

                                  any location where there is a high footfall creating a large number of

                                  potential users

                                  It can be installed in offices and collages for pay charging facility

                                  CHAPTER 17

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  FUTURE

                                  DEVELOPMENT OF

                                  THE PROJECT

                                  FUTURE DEVELOPMENT OF THE PROJECT

                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                  This project is very useful to people who are using mobile phone without charging

                                  condition in public places

                                  It will use with a stereo advertisement carrier that can display video advertisement

                                  It will provide battery backup for make it portable

                                  It will also provide SMS system in future

                                  We can also increase the charging time by editing software of the project

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 18

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  COST ANALYSIS

                                  OF THE PROJECT

                                  COST ANALYSIS OF THE PROJECT

                                  181 COST ANALYSIS OF THE PROJECT

                                  1811 Component list for power supply card

                                  Footprint Quantity Designators Rate

                                  Resistor

                                  22K 1 R2 1

                                  1K 1 R1 1

                                  Capacitor

                                  1000uf25V 1 C5 10

                                  2200uf25V 1 C1 10

                                  022uf 2 C6 C2 1

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                  Table 1811 Component list for power supply card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  01uf 2 C4 C3 1

                                  IC

                                  BRIDGE W10 2 BR2 BR1 10

                                  L7812CV (TO-220) 1 U2 8

                                  L7805CV (TO-220) 1 U1 8

                                  Connector

                                  CON PHO 2PIN 2 J3 J2 16

                                  CON PHO 3PIN 1 J1 12

                                  LED3mm red 2 L1 L2 15

                                  Heat sink (TO-220) 2 16

                                  Total 955

                                  1812 Component list for battery charger card

                                  Footprint Quantity Rate

                                  Capacitor

                                  2200uf25V 1 1000

                                  022uf 4 100

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  01uf 4 100

                                  IC

                                  BRIDGE W10 1 500

                                  L7805CV (TO-220) 4 3200

                                  Connector

                                  CON PHO 2PIN 1 800

                                  Relimate 2 pin 1 400

                                  relimate 3 pin 4 2000

                                  Heat sink (TO-220) 4 1200

                                  TOTAL 9300

                                  1813 Component list for Relay card

                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                  Table 1812Component list for battery charger card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                  Total 18900

                                  1814Component list for controller card

                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                  Table 1813Component list for relay card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                  total 27000

                                  1815 Miscellaneous material

                                  Material Quantity Rate

                                  electronic item

                                  Transformer

                                  TXR1 0-9-15 1 20000

                                  0-9 1A

                                  0-15 100mA

                                  TXR2 0-9 1 16500

                                  0-9 1A

                                  Proximity switch 1 20000

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                  Table 1814Component list for microcontroller card

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Red push bottom 4 4000

                                  Green push button 1 1000

                                  Red led 5mm 4 800

                                  Green led 5mm 4 800

                                  Led holder 8 1600

                                  Copper clad 2 4000

                                  3 core cable 1 meter 1500

                                  3 pin plug 1 3000

                                  2 pin relimate wire 19 9000

                                  3 pin relimate wire 5 3750

                                  4 pin relimate wire 2 2000

                                  mechanical items

                                  Enclosure 1 25000

                                  Acrylic sheet 2 X 1 30000

                                  12mm cable gland 1 1000

                                  Screw 3mm 33 2000

                                  Screw 35mm 6 2400

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  10 mm spacers 100 1500

                                  10mm insert to stud 50 10000

                                  cable tie 2500

                                  Total 162350

                                  CHAPTER 19

                                  APPENDIX

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                  Table 1815Component list for miscellaneous material

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  APPENDIX

                                  191 APPENDIX

                                  1911 78xx IC datasheet

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1912 W10 datasheet

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1913 4n33 IC datasheet

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                  1914 MAX 232

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1915 ULN2003a IC datasheet

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  1916 89V51RD2 IC datasheet

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 20

                                  CONCLUSION

                                  CONCLUSION

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  201 CONCLUSION

                                  The coin-operated mobile phone charger is already successfully installed in

                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                  installed in any business premises

                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                  from airports to pubs from universities to health clubs virtually any location where there is

                                  a high footfall creating a large number of potential users

                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                  extend low mobile phone talk time provide battery charging

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 21

                                  IMAGES OF THE

                                  PROJECT

                                  Images of the project

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  211 IMAGES OF THE PROJECT

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                  fig211 lsquoCoin operated mobile battery charger

                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Fig 216 Relay driver circuit

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                  Fig 213 Constant voltage battery charger circuit

                                  Fig214 Power supply circuit

                                  Fig215 Metal detector proximity switch

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Fig217 Microcontroller circuit

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  Fig228 coin operated mobile battery charger project presentation

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  CHAPTER 22

                                  BIBILOGRAPHY

                                  BIBLIOGRAPHY

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                  221 BIBLIOGRAPHY

                                  BOOKS

                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                  INTERNET LINKS

                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                  • CHAPTER 1

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Constant-voltage (often called constant-potential) chargers maintain nearly the same

                                    voltage input to the battery throughout the charging process regardless of the batterys state

                                    of charge Constant-voltage chargers provide a high initial current to the battery because of

                                    the greater potential difference between the battery and charger

                                    A constant-voltage charger may return as much as 70 of the previous discharge in

                                    the first 30 minutes This proves useful in many battery applications involving multiple

                                    discharge scenarios As the battery charges its voltage increases quickly This reduces the

                                    potential that has been driving the current with a corresponding rapid decrease in charge

                                    current as depicted in the illustration below As a result even though the battery reaches

                                    partial charge quickly obtaining a full charge requires prolonged charging

                                    Given this behavior constant-voltage chargers are frequently found in applications

                                    that normally allow extended charging periods to attain full charge Constant-voltage

                                    chargers should not be used where there is frequent cycling of the battery Repeated

                                    discharges without returning the cell to its full charge will eventually decrease the battery

                                    capacity and may damage individual cells

                                    Fig 54An Illustration graph of the charging function of constant battery charger

                                    Constant-voltage chargers are most often used in two very different modes as a fast

                                    charger to restore a high percentage of charge in a short time or as a float charger to

                                    minimize the effects of overcharge on batteries having infrequent discharges

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 18

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    53 RELAY DRIVER CIRCUIT

                                    531 CIRCUIT DIAGRAM

                                    532 CIRCUIT DIAGRAM EXPLANATION

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                                    Fig 55 Relay driver circuit

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Input from the controller is connected to the relay card through connector J1 which

                                    carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                                    pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                                    These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                                    relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                                    series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                                    and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                                    relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                                    NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                                    3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                                    RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                                    is used to connect power supply to relay card

                                    533 WORKING

                                    While taking Relay1 (RL1) into consideration we will discuss the working of relay

                                    card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                                    of the IC are in cut off region which causes an open circuit so there is no current flow

                                    flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                                    applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                                    completes the path ie provide ground to the relay coil so the current flows through the

                                    LED activating the relay

                                    As the current flows through the relay coil it gets energized and switch over the

                                    contacts ie common and normally open contact get connected and provide a path to flow

                                    current from J11 ie charger into the load connected at J4 hence the cell phone charging

                                    process starts The same above process is applies for all relays If LED is fused or

                                    damaged the path will be open and relay will not be energized and if relay is damaged the

                                    led will not be illuminated So the LED here is used as a FAULT indicator and a

                                    CHARGING ON indicator

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    54 MICROCONTORLLER CIRCUIT

                                    541 CIRCUIT DIAGRAM

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    542 CIRCUIT DIAGRAM EXPLANATION

                                    CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                    the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                    port P04 through J4 and START switch is connected to port P05 through SW5

                                    Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                    P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                    Output for relay card is taken on port P14 to P17

                                    Components C1 R1 and push button S1 forms reset circuit which provides a power

                                    on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                    110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                    22pf capacitor used as loading capacitor for crystal

                                    Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                    RN2 resistance network

                                    IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                    the proximity switch and microcontroller and convert its output readable to microcontroller

                                    IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                    communication between PC and a microcontroller through connector J3

                                    Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                    communication process

                                    Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                    power supply connection

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                    P00 = switch1 for channel 1

                                    P01 = switch2 for channel 2

                                    P02 = switch3 for channel 3

                                    P03 = switch4 for channel 4

                                    P04 = switch5 for coin input sensor (proximity switch)

                                    P05 = switch6 for start charging

                                    P10 = channel 1 red LED1 (ready system)

                                    P11 = channel 2 red LED2 (ready system2)

                                    P12 = channel 3 red LED3 (ready system3)

                                    P13 = channel 4 red LED4 (ready system4)

                                    P14 = channel 1 relay (start system1)

                                    P15 = channel 2 relay (start system2)

                                    P16 = channel 3 relay (start system3)

                                    P17 = channel 4 relay (start system4)

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 6

                                    LIST OF THE

                                    COMPONENTS

                                    List of the components

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    61 LIST OF THE COMPONETS

                                    RESISTORS

                                    CAPACITORS

                                    LIGHT EMITING DIODES (LEDS)- Green Red

                                    RELAYrsquoS-

                                    TRANSFORMERS

                                    RECTIFIER BRIDGES (W 10)

                                    OSCILLATOR

                                    SWITCHES- Push switches

                                    DARLINGTON PAIR IC (ULN2003a)

                                    SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                    SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                    OPTOCOUPLER IC (4N33)

                                    MICROCONTROLLER IC (89V51 RD2)

                                    RELIMATE CONNECTOR- 2 pin amp 4 pin

                                    RS-232 PORT CONNECTOR

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 7

                                    INTRODUCTION

                                    OF COMPONENTS

                                    Working of components

                                    Features or Uses of components

                                    Testing of components

                                    71 RESISTOR

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    711 WORKING

                                    Resistors limit current Resistors are considered to be the most used and the most

                                    important component of all the electronic circuits Resistors resist the flow of electrical

                                    current The higher the value of resistance (measured in ohms)

                                    the lower the current will be

                                    712 TESTING

                                    Read the indicated color code value then select the OHM-scale within but not way

                                    below the indicated value A resistor is good if its resistance is close to the indicated

                                    Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                    all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                    ohmmeter scale settings resistor is shorted

                                    713 SPECIFICATIONS

                                    To completely specify a resistors characteristics requires knowledge of the following

                                    parameters-

                                    bull Value

                                    bull Tolerance

                                    bull Temperature Coefficient

                                    bull Power Rating

                                    The specification of a resistor may be marked on its surface using either of two

                                    systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                    the second more recent system uses a combination of alpha-numeric characters

                                    7 2 CAPACITOR

                                    721 WORKING

                                    When DC voltage is applied to the capacitor an electric charge is stored on each

                                    electrode While the capacitor is charging up current flows The current will stop flowing

                                    when the capacitor has fully charged Capacitors find use

                                    in circuits for a variety of purposes They are used in

                                    time delay generation RC circuits In power supplies for filtering and power supply

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    decoupling as blocking capacitors for power factor correction and motor starting in LC

                                    tank circuits and so on

                                    722 TESTING

                                    To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                    negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                    A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                    and moves back again to infinite resistance position A defective indication for an

                                    electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                    which is an indication that the capacitor is shorted

                                    73 LIGHT EMITING DIODE (LED)

                                    731 WORKING

                                    LEDs are special diodes that emit light when

                                    connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                    indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                    the heart of an LED the semi-conductor chip

                                    In our project Green LED are used here for mainly two purpose

                                    a Charging ON indication (when ON)

                                    b Channel fault indication (always OFF)

                                    732 TESTING

                                    The good and working LED will then light up or glow a busted LED will not LEDs

                                    must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                    1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                    directly connected to a battery or power supply It will be destroyed the LED

                                    733 FEATURES

                                    Single color

                                    High bright output

                                    Low power consumption

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    High reliability and long life

                                    734 Descriptions

                                    Dice material GaInN

                                    Emitting Color Super Bright White

                                    Device Outlineφ5mm Round Type

                                    Lens Type Water Clear

                                    74 RELAY

                                    741 WORKING

                                    A relay is an electrically operated switch Current

                                    flowing through the coil of the relay creates a magnetic field

                                    which attracts a lever and changes the switch contacts The coil

                                    current can be on or off so relays have two switch positions and

                                    most have double throw (changeover) switch contacts

                                    Relays are like remote control switches and are used in

                                    many applications because of their relative simplicity long life

                                    and proven high reliability

                                    742 USES

                                    The main operation of a relay comes in places where only a low-power signal can be

                                    used to control a circuit

                                    It is also used in places where only one signal can be used to control a lot of circuits

                                    The application of relays started during the invention of telephones They played an

                                    important role in switching calls in telephone exchanges They were also used in

                                    long distance telegraphy They were used to switch the signal coming from one

                                    source to another destination

                                    743 TESTING

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    A relay will usually have a coil pole terminal and a set of

                                    contacts The set of contacts that are open when the relay is not

                                    energized are called normally open (NO) contacts and the set of

                                    contacts that are closed when the relay is not energized are called

                                    normally closed (NC) contacts The following steps can be used to perform the testing of

                                    the relay using a multimeter

                                    Keep the multimeter in the continuity check mode

                                    Check for continuity between the NC contacts and pole

                                    Check for discontinuity between NO contacts and the pole

                                    Now energies the relay using the rated voltage For example use a 9V battery for

                                    energizing a 9V relay The relay will engage with clicking sound

                                    Now check for continuity between NO contacts and pole

                                    Also check for discontinuity between NC contacts and pole

                                    As a final test measure the resistance of the relay coil using a multimeter and check

                                    whether it is matching to the value stated by the manufacturer

                                    If all the above tests are positive we can conclude that the relay is healthy

                                    75 TRANSFORMER

                                    751 WORKING

                                    A transformer is a device that transfers electrical energy

                                    from one circuit to another through inductively coupled

                                    electrical conductors A changing current in the first circuit (the

                                    primary) creates a changing magnetic field

                                    This changing magnetic field induces a changing voltage in the second circuit (the

                                    secondary) This effect is called mutual induction

                                    If a load is connected to the secondary circuit electric charge will flow in the

                                    secondary winding of the transformer and transfer energy from the primary circuit to the

                                    load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                    of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                    number of primary turns

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    By appropriate selection of the numbers of turns a transformer thus allows an

                                    alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                    making it less

                                    752 TESTING

                                    1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                    scale and then adjusting the knob to verify its reading is an easy step to the

                                    reading of the ohm

                                    2 To check the resistance of the coil unplug or unsolder the leads of the

                                    transformer from its circuit and measure the resistance of each coil

                                    3 The next step is to test each coil for shorts to other coils

                                    76 RECTIFIER BRIDGE (W 10)

                                    761 WORKING

                                    A diode bridge rectifier is a device for converting AC or

                                    alternating current electricity into DC or direct current AC

                                    electricity goes from positive to negative constantly whereas DC

                                    always flows in the same direction

                                    AC electricity is more efficient to transmit and easier to

                                    convert into different voltages However most appliances need DC current to run A diode

                                    bridge rectifier is the most common type of power supply used to provide this current In

                                    our project W10 is a bridge rectifier which provides on single semiconductor chip

                                    77 OSCILLATOR

                                    771 Working

                                    An oscillator puts out an endless series of pulses The output

                                    constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    all digital circuits have some type of oscillator This stream of output pulses is often

                                    called a clock One of the most important features of any oscillator is its frequency stability

                                    or in other words its ability to provide a constant frequency output under varying load

                                    conditions Some of the factors that affect the frequency stability of an oscillator include

                                    temperature variations in the load and changes in the DC power supply Frequency stability

                                    of the output signal can be improved by the proper selection of the components used for the

                                    resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                    be obtained from normal LC and RC tank circuits

                                    In our project instead of 12MHz crystal 110592MHz is used because it can be

                                    divided to give you exact clock rates for most of the common baud rates for the UART

                                    especially for the higher speeds (9600 19200) These crystals are readily available and

                                    commonly used

                                    78 SWITCH

                                    781 WORKING

                                    The most familiar form of switch is a manually operated

                                    electromechanical device with one or more sets of electrical contacts

                                    Each set of contacts can be in one of two states either closed meaning

                                    the contacts are touching and electricity can flow between them or

                                    open meaning the contacts are separated and the switch is non

                                    conducting The mechanism actuating the transition between these two

                                    states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                    momentary (push-for on or push-for off) type

                                    782 USES

                                    In electronics a switch is an electrical component that can break an electrical

                                    circuit interrupting the current or diverting it from one conductor to another

                                    783 TESTING

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                    no connection Switch can tested by using multimeter in continuity range

                                    79 DARLINGTON PAIR IC (ULN2003a)

                                    791 WORKING

                                    The Darlington transistor (often called a Darlington pair) is a

                                    compound structure consisting of two bipolar transistors (either

                                    integrated or separated devices) connected in such a way that the

                                    current amplified by the first transistor is amplified further by the

                                    second one This configuration gives a much higher current gain than

                                    each transistor taken separately and in the case of integrated devices

                                    can take less space than two individual transistors because they can

                                    use a shared collector

                                    Integrated Darlington pairs come packaged singly in

                                    transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                    The Darlington transistor array used is ULN2003 Applications include relay

                                    drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                    drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                    to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                    for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                    792 FEATURES

                                    The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                    transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                    with common-cathode clamp diodes for switching inductive loads The collector-current

                                    rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                    higher current capability

                                    710 SERIES VOLTAGE REGULATER IC (78XX)

                                    7101 WORKING

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Voltage Regulator (regulator) usually having three legs converts varying input

                                    voltage and produces a constant regulated output voltage They are available in a variety of

                                    outputs

                                    The most common part numbers start with the numbers 78 or 79 and finish with two

                                    digits indicating the output voltage The number 78 represents positive voltage and 79

                                    negative one The 78XX series of voltage regulators are designed for positive input

                                    The LM78XX series typically has the ability to drive current up to 1A For

                                    application requirements up to 150mA 78LXX can be used As mentioned above the

                                    component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                    an output leg with the regulators voltage

                                    As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                    voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                    difference between the input and output appears as heat If the input voltage is unnecessarily

                                    high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                    sinking the regulator will shut down

                                    711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                    7111 WORKING

                                    The MAX-232 It includes a Charge Pump which generates

                                    +10V and -10V from a single 5v supply

                                    This IC also includes two receivers and two transmitters in

                                    the same package This is handy in many cases when we only want to

                                    use the Transmit and Receive data Lines We dont need to use two chips one for the

                                    receive line and one for the transmit There are also many variations of these devices The

                                    large value of capacitors are not only bulky but also expensive Therefore other devices are

                                    available which use smaller capacitors and even some with inbuilt capacitors However the

                                    MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                    Dual Charge-Pump Voltage Converter

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                    V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                    output

                                    712 OPTOCOUPLER IC (4N33)

                                    7121 WORKING

                                    In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                    photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                    between elements of a circuit typically a transmitter and a receiver while keeping them

                                    electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                    back to an electrical signal electrical contact along the path is broken

                                    Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                    essentially a combination of two distinct devices an optical transmitter typically a gallium

                                    arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                    light-triggered diac The two are separated by a transparent barrier which blocks any

                                    electrical current flow between the two but does allow the passage of light

                                    The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                    silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                    of isolation between driving and load circuits These Optocouplers can be used to replace

                                    reed and mercury relays with advantages of long life high speed switching and elimination

                                    of magnetic field

                                    713 MICROCONTROLLER IC (89V51 RD 2 )

                                    713 WORKING

                                    The P89V51RD2 is an 80C51 microcontroller with 64

                                    kB Flash and 1024 bytes of data RAM

                                    A key feature of the P89V51RD2 is its X2 mode option

                                    The design engineer can choose to run the application with the conventional 80C51 clock

                                    rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    achieve twice the throughput at the same clock frequency Another way to benefit from this

                                    feature is to keep the same performance by reducing the clock frequency by half thus

                                    dramatically reducing the EMI

                                    The Flash program memory supports both parallel programming and in serial In-

                                    System Programming (ISP) Parallel programming mode offers gang-programming at high

                                    speed reducing programming costs and time to market ISP allows a device to be

                                    reprogrammed in the end product under software control The capability to fieldupdate the

                                    application firmware makes a wide range of applications possible The P89V51RD2 is also

                                    In-Application Programmable (IAP) allowing the Flash program memory to be

                                    reconfigured even while the application is running

                                    714 RELIMATE CONNECTOR

                                    7141 WORKING

                                    These are wire to board type connectors used to facilitate

                                    proper and firm electrical connection between the relay card and

                                    microcontroller card

                                    The connector has following specifications

                                    No of Ways 2-20

                                    Voltage Rating 250V AC DC

                                    Current Rating 3A AC DC

                                    Contact Resistance 20mW max

                                    Insulation Resistance 1000MW min

                                    Dielectric Withstanding 1000V ACminute

                                    Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                    The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                    connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                    conflicts

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    715 RS-232 PORT CONNECTOR

                                    7151 WORKING

                                    Almost all digital devices which we use require either TTL

                                    or CMOS logic levels Therefore the first step to connecting a

                                    device to the RS-232 port is to transform the RS-232 levels back

                                    into 0 and 5 Volts This is done by RS-232 Level Converters

                                    Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                    Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                    The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                    problem in many instances where only a single supply of +5V is present

                                    CHAPTER 8

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    IMPLIMENTATION

                                    OF THE PCB

                                    Components layout designing

                                    Developing or Etching the PCB

                                    Other operations like Drilling Cutting Tinning

                                    81 IMPLIMENTATION OF THE PCB

                                    A proper PCB ensure that various circuit components are interconnected as per the

                                    circuit diagram once they have been placed on the PCB in their proper positions and

                                    subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                    base material to which is permanently attached a flat metallic network of conducting path

                                    whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                    for this project is single one

                                    The basic material used may be resin coated paper fiber glass ceramic and the flat

                                    board configuration however is most widely used and it may be of the nature of the single

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                    which ensures adequate and permanent low resistance coupling

                                    811 BOARD DESIGN

                                    PCB designed is the most important and requires great care during work In this case

                                    great care must be taken while tracing the circuit or layout on the board Because once PCB

                                    is designed it is virtually impossible to alter it While designing a circuit designer should

                                    take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                    unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                    also help to solve this problem when circuit is complicated

                                    812 THE MASTER DIAGRAM

                                    The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                    which is commonly made twice as the finished circuit since this makes the working on that

                                    much easier especially when circuit is complicated photography eventually reduces the

                                    size of diagram to that of the circuit before proceeding we must know some rules regarding

                                    the designing -

                                    a The space between the conductors must be strictly controlled to avoid the possibility

                                    of electrical discharges or unwanted capacitance The amount by which the mater

                                    diagram is to reduce in size is thus a critical deign feature

                                    b The conductor must be wider in those part of the circuits that are going to handle

                                    large current must be handle without undue temperature of conductors

                                    c The minimum width of copper should not generally be less than about 15mmThis

                                    is related to mechanical strength rather than electrical properties and it also ensure

                                    that strips remains securely bounded to the base material

                                    d The points where the component holes for component lead wire occurs must be sited

                                    to suit the dimensions of the component and dimensions between lead-out wire so

                                    that the components can be situated correctly on finished board The conductor is

                                    also main large at the point of holes

                                    813 PCB MAKING

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    When the mater diagram probable twice the size of real PCB has been evolved the

                                    test major step consists of etching or dissolving the unwanted metal from copper claded

                                    board to create a circuit as depicted by master diagram It must be stressed that very

                                    accurate checking master is essential at this stage Then the master point is mounted on a

                                    special frame on easy facing of a larger camera and with the aid of the very powerful

                                    illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                    developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                    brought into operation This comprises the camera body mounted so that sideways after

                                    each exposure In this way number of copies of the original master diagram is set out

                                    exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                    In case of simple and need of number of less PCB economic and advisable to use the

                                    following lab method of PCB making

                                    Planning The Circuit

                                    It is not a particular difficult There are several important factors that need not be

                                    taken into account if the finished device is to work properly we must consider gain factor

                                    and ensure that the input and output parts are sufficiently well isolated to avoid the

                                    possibility We must also ensure that conductors and components carrying high frequency

                                    current are well separated from the part of the circuit We are also to make sure that all

                                    components need to return to earth are properly connected and that possibility of common

                                    impedance arising earth returned

                                    Circuit is totally eliminated by making all earth as substantial possible consistent

                                    with nature of design Other factors that have to successfully studied include availability of

                                    adequate return points on board and itrsquos mounting from accessibility of switch connection

                                    made for mechanical fixing ventilation effect of vibration

                                    Cleaning The Board

                                    The copper side of the board must be thoroughly cleaned before circuit plan is

                                    transferred to it This is important because even slightest trace of graze (from figure of

                                    instance) will impure the etching process and when the circuit plan has been neatly

                                    transferred to copper in this manner the board is held under running tap and the allowed to

                                    dry before resist is applied

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Transforming the Plan

                                    Now once cleaning is done plan has to transfer on copper surface of PCB material

                                    A convenient way to do this is simply put the carbon paper between a copper surface of the

                                    board and working plan and carefully trace the lines of original plan with a ball pen

                                    Resist

                                    Resist is nothing more than a substrate that is unaffected by presence etching

                                    chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                    clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                    covered when resists the leaguer type of paints possess good resist properties but

                                    disadvantage of relatively long time taken for drying It is essential to resist through

                                    hardening before etching is started Nail polished are better as they quickly and are less

                                    difficult to remove

                                    To overcome this drying effect and to achieve the sharp edge of the trace on the

                                    PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                    short circulating due to paints are completely the avoid etching tapes and pads are available

                                    in different sizes

                                    Correcting Error

                                    When a result has been thoroughly hardened any errors that have been made can

                                    usually be corrected by gently scratching away with knife To ensure clear out lines round

                                    edges of copper conductors on board the resist must be applied with steady band

                                    Etching

                                    Next comes etching of unwanted copper amp whether a small single is all that is

                                    required as quantity of board to be produce certain precautions must be taken before

                                    operation is commenced the most used etch amp I ferrite chloride to this is added small

                                    quantity of HCL to accelerate But not critical as lab construction concerned A good

                                    etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                    grams of water

                                    Agitation

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                    the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                    temperature and thickness of copper foil

                                    Finishing Off

                                    When all unwanted copper is dissolved from areas between conductor board should

                                    be taken from an etchant amp washed in water The resist must be removed using proper

                                    solvent After this the copper surface must be polished with any kind of cleaner It should be

                                    seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                    This process is called Tinning This process of coating involve track with soldier

                                    Advantage of tinning the effect of environment of conductors then PCB is drilled

                                    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                    Assembling On PCB

                                    After the holes are drilled the component have to be assembled on PCB before

                                    assembling the components it is necessary to clean soldering iron in order to get easy amp

                                    accurate soldering Removing impurity particles that are gathered on iron bit due to

                                    repetitive use cleans soldering iron

                                    CHAPTER 9

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    SOLDERING

                                    TECHNIQUE

                                    Technique for good soldering

                                    91 SOLDERING TECHNIQUE

                                    For soldering of any joints first the terminal to be soldered are cleaned to remove

                                    oxide film or dirt on it If required flux is applied on the points to be soldered

                                    Now the joint to be soldered is heated with the help of soldering iron Heat

                                    applied should be such that when solder wire is touched to joint it must melt

                                    quickly

                                    The joint and the soldering iron is held such that molten solder should flow

                                    smoothly over the joint

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    When joint is completely covered with molten solder the soldering iron is re-

                                    moved

                                    The joint is allowed to cool without any movement

                                    The bright shining solder indicates good soldering

                                    In case of dry solder joint a air gap remains in between the solder material and

                                    the joint It means that soldering is improper This is removed and again solder-

                                    ing is done

                                    Thus this way all the components are soldered on P C B

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 10

                                    PCB LAYOUTS

                                    Schematic diagram

                                    Bottom and top layout

                                    101 POWER SUPPLY CARD

                                    1011 SCHIMETIC DIAGRAM

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1012 LEGEND MARKING

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                    Fig1011 Schematic diagram of power supply card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1013TOP LAYER

                                    1014 BOTTOM LAYER

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                    Fig1013 Top layer of power supply

                                    card

                                    Fig1014 Schematic diagram of power supply card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    102 BATTERY CHARGER CARD

                                    1021 SCHEMATIC DIAGRAM

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                    Fig1021 Schematic diagram of battery charger card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    103 RELAY CARD

                                    1031 SCHIMETIC DIAGRAM

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                    Fig1031 Schematic diagram of Relay card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1032 RELAY CARD LEGEND MARKING

                                    1033 TOP LAYER

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                    Fig1032 Legend marking of Relay card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1034 BOTTOM LAYER

                                    104 MICROCONTROLER CARD

                                    1041 SCHIMETIC DIAGRAM

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                    Fig1034 Bottom layer of Relay card

                                    Fig1041 Schematic diagram of microcontroller card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1042 ALL LAYERS

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                    Fig1042 All layer of microcontroller card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 11

                                    INTRODUCTION

                                    OF SOFTWARE

                                    Keil (microVision 2)

                                    Eagle (Easily Applicable Graphical Layout Editor)

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    111 Keil (microVision 2)

                                    1111 Introduction to C51 Cross Compiler

                                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                    generates object code that matches the efficiency and speed of assembly programming

                                    Using a high-level language like C has many advantages over assembly language

                                    programming

                                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                    the memory structure of the 8051 CPU is desirable (but not necessary)

                                    Details like register allocation and addressing of the various memory types and data

                                    types is managed by the compiler

                                    Programs get a formal structure (which is imposed by the C programming language) and

                                    can be divided into separate functions This contributes to source code reusability as

                                    well as better overall application structure

                                    The ability to combine variable selection with specific operations improves program

                                    readability

                                    Keywords and operational functions that more nearly resemble the human thought

                                    process may be used

                                    Programming and program test time is drastically reduced

                                    The C run-time library contains many standard routines such as formatted output

                                    numeric conversions and floating-point arithmetic

                                    Existing program parts can be more easily included into new programs because of

                                    modular program construction techniques

                                    The language C is a very portable language (based on the ANSI standard) that enjoys

                                    wide popular support and is easily obtained for most systems Existing program

                                    investments can be quickly adapted to other processors as needed

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1112 Software Development Cycle in Keil

                                    When we use the Keil Software tools the

                                    project development cycle is roughly the same as

                                    it is for any other software development project

                                    1 Create a project select the target chip from the

                                    device database and configure the tool settings

                                    2 Create source files in C or assembly

                                    3 Build your application with the project

                                    manager

                                    4 Correct errors in source files

                                    5 Test the linked application A block diagram of

                                    the complete 8051 tool set may best illustrate the

                                    development cycle

                                    112 Eagle (Easily Applicable Graphical Layout Editor)

                                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                    1121 Schematic Editor

                                    In this one can develop amp design circuits for the required PCB

                                    1122 Layout Editor

                                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                    Fig 111 Software development in KEIL

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1123 Library Editor

                                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                    1124 Auto Router

                                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                                    the PCB tracks designed

                                    1125 Cam Processor

                                    This is used to finally print the various layers of the designed PCB viz Top Layer

                                    Bottom Layer Component Layer Masking Layer etc

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                    Start

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 12

                                    INTRODUCTION

                                    OF

                                    PROGRAMMING

                                    Flowchart of programming

                                    Program code

                                    121 Flowchart

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                    2

                                    flag9==1

                                    flag9=1

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                    flag11==1

                                    flag11=1 flag11=0 flag4=0

                                    REady_LED4=0

                                    Sw2_op (P01) ==0

                                    My delay (10)

                                    3 3

                                    flag2=1 disp2=1 k2=0

                                    3

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                    4

                                    flag11==1

                                    flag11=0 flag4=0 REady_LED4=0

                                    flag11=1

                                    My delay (10)

                                    flag3=1 disp3=1 k3=0

                                    k1==0||k2==0||k4==0

                                    Sw3_op (P02) ==0

                                    5

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                    flag5==1

                                    5

                                    flag11==1

                                    flag7=1

                                    flag7==1

                                    flag7=0 flag2=0 REady_LED2=0

                                    6

                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                    flag11=0 flag4=0 REady_LED4=0

                                    flag11=1

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                    6

                                    My delay (10)

                                    flag4=1 disp4=1 k4=0

                                    k1==0||k2==0||k3==0 flag5==1

                                    7

                                    Sw4_op (P03) ==0

                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                    7

                                    flag7==1

                                    flag9==1

                                    flag7=1

                                    flag7=0 flag2=0 REady_LED2=0

                                    flag9=0 flag3=0 REady_LED3=0

                                    flag9=1

                                    Sw5_op A(P04) ==0

                                    My delay (10)

                                    8

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                    9

                                    flag2==1

                                    flag3==1

                                    8

                                    flag1==1

                                    flag4==1 flag5=1 disp5=1

                                    flag9=1 disp5=1

                                    flag7=1 disp5=1

                                    flag11=1 disp5=1

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                    Sw6_op (P05) ==0

                                    My delay (10)

                                    flag2==1 ampamp flag7==1

                                    flag3==1 ampamp flag9==1 9

                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                    flag8=1 disp6=1

                                    10

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                    10

                                    flag4==1 ampamp flag11==1

                                    flag10=1 disp6=1

                                    flag12=1 disp6=1

                                    flag8==1

                                    flag10==1

                                    11

                                    flag6==1

                                    i++

                                    l++

                                    j++

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                    flag12==1

                                    M++

                                    11

                                    Stop

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    122 Program

                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                    define buzzerP2_0 buzzer indication

                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                    sbit sw5_op=P0^4 input switch5 for coin

                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                    output Led for indication

                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                    function prototype declaration

                                    void my_delay(unsigned int value) DELAY FUCTION

                                    void init_timer() timer 0 initialization function

                                    variable declaration

                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    start of main programme

                                    void main()

                                    init_timer() call it timer initialization function

                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                    start of while loop

                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                    condition for switch1

                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                    if(iltk) loop will repeat for desired time of charging

                                    if(igt=1000)

                                    buzzer=1 turn on buzzer if (ii==20)

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    REady_LED1=1 turn on ready indication of led1

                                    else if(ii==40)

                                    REady_LED1=0ii=0

                                    elseREady_LED1=0

                                    START_LED1=1

                                    else

                                    START_LED1=0

                                    k1=1 buzzer=0

                                    REady_LED1=0 flag1=0

                                    flag5=0flag6=0

                                    condition for switch2

                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                    REady_LED2=1 turn on ready 2 led indication

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    disp2=0

                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                    if(jltk)

                                    if(jgt1000) buzzer=1 if(jj==20)

                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                    elseREady_LED2=0

                                    START_LED2=1

                                    else START_LED2=0

                                    REady_LED2=0 k2=1 buzzer=0

                                    flag2=0flag7=0flag8=0

                                    j=0jj=0

                                    condition for switch 3

                                    if(flag3==1) check swich3 pressed

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    if(disp3==1 )

                                    REady_LED3=1 disp3=0

                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                    if(lltk)

                                    if(lgt1000) buzzer=1 if(ll==20)

                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                    elseREady_LED3=0

                                    START_LED3=1

                                    else START_LED3=0

                                    LED2=0 k3=1 buzzer=0

                                    REady_LED3=0 flag3=0

                                    flag9=0flag10=0

                                    l=0ll=0

                                    condition for switch 4

                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    REady_LED4=1 disp4=0

                                    if(flag11==1) check coin is pressed

                                    if(flag12==1) START is pressed

                                    if(mltk)

                                    if(mgt1000)

                                    buzzer=1 if(mm==20)

                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                    elseREady_LED4=0

                                    START_LED4=1

                                    else START_LED4=0

                                    buzzer=0 k4=1

                                    REady_LED4=0 flag4=0

                                    flag11=0flag12=0

                                    m=0mm=0

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    while(1)

                                    end of main programme

                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                    whenever specific time the interrupt will generate control will go in following function

                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if(sw1_op==0 ) ready switch flag for system1

                                    my_delay(10) CALL DELAY FUNCTION

                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                    if(flag7==1) SET THE FLAG

                                    flag7=1

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                    flag9=1

                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                    flag11=1

                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if(sw2_op==0 ) fready switch flag for system2

                                    my_delay (10)

                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                    if(flag5==1)

                                    flag5=1

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                    flag9=1

                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                    flag11=1

                                    elseflag11=0flag4=0REady_LED4=0

                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                    if(flag7==1)

                                    flag7=1

                                    else

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                    flag5=1

                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                    flag11=1

                                    elseflag11=0flag4=0REady_LED4=0

                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                    if(flag7==1)

                                    flag7=1

                                    elseflag7=0

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    flag2=0REady_LED2=0 if(flag5==1)

                                    flag5=1

                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                    flag9=1

                                    elseflag9=0flag3=0REady_LED3=0

                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                    if(flag6==1)

                                    i++ if (igt1000) ii++

                                    if (flag8==1)

                                    j++ if(jgt1000) jj++

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    if (flag10==1)

                                    l++ if (lgt1000) ll++

                                    if (flag12==1)

                                    m++ if (mgt1000) mm++

                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 13

                                    TROUBLE SHOOT

                                    Troubleshoot

                                    131 TROUBLE SHOOT

                                    A newly assembled circuit does not work may be due to -

                                    Faulty components

                                    Improper soldering

                                    Wrong connections

                                    Also any stop in working after some period may be due to -

                                    Component failure

                                    Supply failure

                                    Damaging of PCB

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Fault finding is very essential if you want the circuit to operate properly

                                    If a newly assembled circuit is not working properly check all the components and

                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                    proper soldering

                                    If faults are not observed during physical observations one should proceed for Hot

                                    test ie Voltage measurement at different points for example at Input terminal etc

                                    Resistance measurement is also done which is known as Dry test

                                    During this project work some green LEDs was not glow then we checked it

                                    continuity and replace it

                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                    heated after starting the project It happens because of some soldering points are shorted

                                    during soldering PCB We solved that problem

                                    CHAPTER 14

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    ADVANTAGES OF

                                    THE PROJECT

                                    Advantages

                                    141 ADVANTAGES OF THE PROJECT

                                    Simple and hand efficient Microcontroller based system

                                    Fast charging capacity

                                    Simple to operate

                                    Ease of mobility

                                    Facilitates connectivity for 90 of cellular phones

                                    Less expensive

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Reduced man power

                                    Low power consumption

                                    It can offer emergency charging for 4sets of handsets synchronously

                                    CHAPTER 15

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    DISADVANTAGES

                                    OF THE PROJECT

                                    Disadvantages

                                    151 DISADVANTAGES OF THE PROJECT

                                    It requires mains supply to work project

                                    Due to limited charging channels till now there may be a possibility that

                                    mobile phones of few brands cannot be connected for charging For this

                                    purpose we have to use separate connectors for that specific brand differently

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                    min

                                    It does not have battery backup therefore it cannot be portable

                                    CHAPTER 16

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    APPLICATIONS OF

                                    THE PROJECT

                                    Application

                                    161 APPLICATIONS OF THE PROJECT

                                    The coin based mobile phone charger is very useful to public for using coin to

                                    charge for the mobile phone in any places

                                    It is used for emergency charging purposes

                                    It can be installed in malls railway stations bus stops and other public

                                    places

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    The charger offers a unique revenue opportunity for a vast range of

                                    businesses - from airports to pubs from universities to health clubs virtually

                                    any location where there is a high footfall creating a large number of

                                    potential users

                                    It can be installed in offices and collages for pay charging facility

                                    CHAPTER 17

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    FUTURE

                                    DEVELOPMENT OF

                                    THE PROJECT

                                    FUTURE DEVELOPMENT OF THE PROJECT

                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                    This project is very useful to people who are using mobile phone without charging

                                    condition in public places

                                    It will use with a stereo advertisement carrier that can display video advertisement

                                    It will provide battery backup for make it portable

                                    It will also provide SMS system in future

                                    We can also increase the charging time by editing software of the project

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 18

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    COST ANALYSIS

                                    OF THE PROJECT

                                    COST ANALYSIS OF THE PROJECT

                                    181 COST ANALYSIS OF THE PROJECT

                                    1811 Component list for power supply card

                                    Footprint Quantity Designators Rate

                                    Resistor

                                    22K 1 R2 1

                                    1K 1 R1 1

                                    Capacitor

                                    1000uf25V 1 C5 10

                                    2200uf25V 1 C1 10

                                    022uf 2 C6 C2 1

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                    Table 1811 Component list for power supply card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    01uf 2 C4 C3 1

                                    IC

                                    BRIDGE W10 2 BR2 BR1 10

                                    L7812CV (TO-220) 1 U2 8

                                    L7805CV (TO-220) 1 U1 8

                                    Connector

                                    CON PHO 2PIN 2 J3 J2 16

                                    CON PHO 3PIN 1 J1 12

                                    LED3mm red 2 L1 L2 15

                                    Heat sink (TO-220) 2 16

                                    Total 955

                                    1812 Component list for battery charger card

                                    Footprint Quantity Rate

                                    Capacitor

                                    2200uf25V 1 1000

                                    022uf 4 100

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    01uf 4 100

                                    IC

                                    BRIDGE W10 1 500

                                    L7805CV (TO-220) 4 3200

                                    Connector

                                    CON PHO 2PIN 1 800

                                    Relimate 2 pin 1 400

                                    relimate 3 pin 4 2000

                                    Heat sink (TO-220) 4 1200

                                    TOTAL 9300

                                    1813 Component list for Relay card

                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                    Table 1812Component list for battery charger card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                    Total 18900

                                    1814Component list for controller card

                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                    Table 1813Component list for relay card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                    total 27000

                                    1815 Miscellaneous material

                                    Material Quantity Rate

                                    electronic item

                                    Transformer

                                    TXR1 0-9-15 1 20000

                                    0-9 1A

                                    0-15 100mA

                                    TXR2 0-9 1 16500

                                    0-9 1A

                                    Proximity switch 1 20000

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                    Table 1814Component list for microcontroller card

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Red push bottom 4 4000

                                    Green push button 1 1000

                                    Red led 5mm 4 800

                                    Green led 5mm 4 800

                                    Led holder 8 1600

                                    Copper clad 2 4000

                                    3 core cable 1 meter 1500

                                    3 pin plug 1 3000

                                    2 pin relimate wire 19 9000

                                    3 pin relimate wire 5 3750

                                    4 pin relimate wire 2 2000

                                    mechanical items

                                    Enclosure 1 25000

                                    Acrylic sheet 2 X 1 30000

                                    12mm cable gland 1 1000

                                    Screw 3mm 33 2000

                                    Screw 35mm 6 2400

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    10 mm spacers 100 1500

                                    10mm insert to stud 50 10000

                                    cable tie 2500

                                    Total 162350

                                    CHAPTER 19

                                    APPENDIX

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                    Table 1815Component list for miscellaneous material

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    APPENDIX

                                    191 APPENDIX

                                    1911 78xx IC datasheet

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1912 W10 datasheet

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1913 4n33 IC datasheet

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                    1914 MAX 232

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1915 ULN2003a IC datasheet

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    1916 89V51RD2 IC datasheet

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 20

                                    CONCLUSION

                                    CONCLUSION

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    201 CONCLUSION

                                    The coin-operated mobile phone charger is already successfully installed in

                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                    installed in any business premises

                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                    from airports to pubs from universities to health clubs virtually any location where there is

                                    a high footfall creating a large number of potential users

                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                    extend low mobile phone talk time provide battery charging

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 21

                                    IMAGES OF THE

                                    PROJECT

                                    Images of the project

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    211 IMAGES OF THE PROJECT

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                    fig211 lsquoCoin operated mobile battery charger

                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Fig 216 Relay driver circuit

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                    Fig 213 Constant voltage battery charger circuit

                                    Fig214 Power supply circuit

                                    Fig215 Metal detector proximity switch

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Fig217 Microcontroller circuit

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    Fig228 coin operated mobile battery charger project presentation

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    CHAPTER 22

                                    BIBILOGRAPHY

                                    BIBLIOGRAPHY

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                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                    221 BIBLIOGRAPHY

                                    BOOKS

                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                    INTERNET LINKS

                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                    • CHAPTER 1

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      53 RELAY DRIVER CIRCUIT

                                      531 CIRCUIT DIAGRAM

                                      532 CIRCUIT DIAGRAM EXPLANATION

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 19

                                      Fig 55 Relay driver circuit

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Input from the controller is connected to the relay card through connector J1 which

                                      carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                                      pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                                      These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                                      relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                                      series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                                      and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                                      relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                                      NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                                      3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                                      RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                                      is used to connect power supply to relay card

                                      533 WORKING

                                      While taking Relay1 (RL1) into consideration we will discuss the working of relay

                                      card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                                      of the IC are in cut off region which causes an open circuit so there is no current flow

                                      flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                                      applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                                      completes the path ie provide ground to the relay coil so the current flows through the

                                      LED activating the relay

                                      As the current flows through the relay coil it gets energized and switch over the

                                      contacts ie common and normally open contact get connected and provide a path to flow

                                      current from J11 ie charger into the load connected at J4 hence the cell phone charging

                                      process starts The same above process is applies for all relays If LED is fused or

                                      damaged the path will be open and relay will not be energized and if relay is damaged the

                                      led will not be illuminated So the LED here is used as a FAULT indicator and a

                                      CHARGING ON indicator

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      54 MICROCONTORLLER CIRCUIT

                                      541 CIRCUIT DIAGRAM

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      542 CIRCUIT DIAGRAM EXPLANATION

                                      CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                      the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                      port P04 through J4 and START switch is connected to port P05 through SW5

                                      Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                      P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                      Output for relay card is taken on port P14 to P17

                                      Components C1 R1 and push button S1 forms reset circuit which provides a power

                                      on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                      110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                      22pf capacitor used as loading capacitor for crystal

                                      Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                      RN2 resistance network

                                      IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                      the proximity switch and microcontroller and convert its output readable to microcontroller

                                      IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                      communication between PC and a microcontroller through connector J3

                                      Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                      communication process

                                      Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                      power supply connection

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                      P00 = switch1 for channel 1

                                      P01 = switch2 for channel 2

                                      P02 = switch3 for channel 3

                                      P03 = switch4 for channel 4

                                      P04 = switch5 for coin input sensor (proximity switch)

                                      P05 = switch6 for start charging

                                      P10 = channel 1 red LED1 (ready system)

                                      P11 = channel 2 red LED2 (ready system2)

                                      P12 = channel 3 red LED3 (ready system3)

                                      P13 = channel 4 red LED4 (ready system4)

                                      P14 = channel 1 relay (start system1)

                                      P15 = channel 2 relay (start system2)

                                      P16 = channel 3 relay (start system3)

                                      P17 = channel 4 relay (start system4)

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 6

                                      LIST OF THE

                                      COMPONENTS

                                      List of the components

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      61 LIST OF THE COMPONETS

                                      RESISTORS

                                      CAPACITORS

                                      LIGHT EMITING DIODES (LEDS)- Green Red

                                      RELAYrsquoS-

                                      TRANSFORMERS

                                      RECTIFIER BRIDGES (W 10)

                                      OSCILLATOR

                                      SWITCHES- Push switches

                                      DARLINGTON PAIR IC (ULN2003a)

                                      SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                      SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                      OPTOCOUPLER IC (4N33)

                                      MICROCONTROLLER IC (89V51 RD2)

                                      RELIMATE CONNECTOR- 2 pin amp 4 pin

                                      RS-232 PORT CONNECTOR

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 7

                                      INTRODUCTION

                                      OF COMPONENTS

                                      Working of components

                                      Features or Uses of components

                                      Testing of components

                                      71 RESISTOR

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      711 WORKING

                                      Resistors limit current Resistors are considered to be the most used and the most

                                      important component of all the electronic circuits Resistors resist the flow of electrical

                                      current The higher the value of resistance (measured in ohms)

                                      the lower the current will be

                                      712 TESTING

                                      Read the indicated color code value then select the OHM-scale within but not way

                                      below the indicated value A resistor is good if its resistance is close to the indicated

                                      Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                      all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                      ohmmeter scale settings resistor is shorted

                                      713 SPECIFICATIONS

                                      To completely specify a resistors characteristics requires knowledge of the following

                                      parameters-

                                      bull Value

                                      bull Tolerance

                                      bull Temperature Coefficient

                                      bull Power Rating

                                      The specification of a resistor may be marked on its surface using either of two

                                      systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                      the second more recent system uses a combination of alpha-numeric characters

                                      7 2 CAPACITOR

                                      721 WORKING

                                      When DC voltage is applied to the capacitor an electric charge is stored on each

                                      electrode While the capacitor is charging up current flows The current will stop flowing

                                      when the capacitor has fully charged Capacitors find use

                                      in circuits for a variety of purposes They are used in

                                      time delay generation RC circuits In power supplies for filtering and power supply

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      decoupling as blocking capacitors for power factor correction and motor starting in LC

                                      tank circuits and so on

                                      722 TESTING

                                      To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                      negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                      A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                      and moves back again to infinite resistance position A defective indication for an

                                      electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                      which is an indication that the capacitor is shorted

                                      73 LIGHT EMITING DIODE (LED)

                                      731 WORKING

                                      LEDs are special diodes that emit light when

                                      connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                      indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                      the heart of an LED the semi-conductor chip

                                      In our project Green LED are used here for mainly two purpose

                                      a Charging ON indication (when ON)

                                      b Channel fault indication (always OFF)

                                      732 TESTING

                                      The good and working LED will then light up or glow a busted LED will not LEDs

                                      must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                      1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                      directly connected to a battery or power supply It will be destroyed the LED

                                      733 FEATURES

                                      Single color

                                      High bright output

                                      Low power consumption

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      High reliability and long life

                                      734 Descriptions

                                      Dice material GaInN

                                      Emitting Color Super Bright White

                                      Device Outlineφ5mm Round Type

                                      Lens Type Water Clear

                                      74 RELAY

                                      741 WORKING

                                      A relay is an electrically operated switch Current

                                      flowing through the coil of the relay creates a magnetic field

                                      which attracts a lever and changes the switch contacts The coil

                                      current can be on or off so relays have two switch positions and

                                      most have double throw (changeover) switch contacts

                                      Relays are like remote control switches and are used in

                                      many applications because of their relative simplicity long life

                                      and proven high reliability

                                      742 USES

                                      The main operation of a relay comes in places where only a low-power signal can be

                                      used to control a circuit

                                      It is also used in places where only one signal can be used to control a lot of circuits

                                      The application of relays started during the invention of telephones They played an

                                      important role in switching calls in telephone exchanges They were also used in

                                      long distance telegraphy They were used to switch the signal coming from one

                                      source to another destination

                                      743 TESTING

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      A relay will usually have a coil pole terminal and a set of

                                      contacts The set of contacts that are open when the relay is not

                                      energized are called normally open (NO) contacts and the set of

                                      contacts that are closed when the relay is not energized are called

                                      normally closed (NC) contacts The following steps can be used to perform the testing of

                                      the relay using a multimeter

                                      Keep the multimeter in the continuity check mode

                                      Check for continuity between the NC contacts and pole

                                      Check for discontinuity between NO contacts and the pole

                                      Now energies the relay using the rated voltage For example use a 9V battery for

                                      energizing a 9V relay The relay will engage with clicking sound

                                      Now check for continuity between NO contacts and pole

                                      Also check for discontinuity between NC contacts and pole

                                      As a final test measure the resistance of the relay coil using a multimeter and check

                                      whether it is matching to the value stated by the manufacturer

                                      If all the above tests are positive we can conclude that the relay is healthy

                                      75 TRANSFORMER

                                      751 WORKING

                                      A transformer is a device that transfers electrical energy

                                      from one circuit to another through inductively coupled

                                      electrical conductors A changing current in the first circuit (the

                                      primary) creates a changing magnetic field

                                      This changing magnetic field induces a changing voltage in the second circuit (the

                                      secondary) This effect is called mutual induction

                                      If a load is connected to the secondary circuit electric charge will flow in the

                                      secondary winding of the transformer and transfer energy from the primary circuit to the

                                      load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                      of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                      number of primary turns

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      By appropriate selection of the numbers of turns a transformer thus allows an

                                      alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                      making it less

                                      752 TESTING

                                      1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                      scale and then adjusting the knob to verify its reading is an easy step to the

                                      reading of the ohm

                                      2 To check the resistance of the coil unplug or unsolder the leads of the

                                      transformer from its circuit and measure the resistance of each coil

                                      3 The next step is to test each coil for shorts to other coils

                                      76 RECTIFIER BRIDGE (W 10)

                                      761 WORKING

                                      A diode bridge rectifier is a device for converting AC or

                                      alternating current electricity into DC or direct current AC

                                      electricity goes from positive to negative constantly whereas DC

                                      always flows in the same direction

                                      AC electricity is more efficient to transmit and easier to

                                      convert into different voltages However most appliances need DC current to run A diode

                                      bridge rectifier is the most common type of power supply used to provide this current In

                                      our project W10 is a bridge rectifier which provides on single semiconductor chip

                                      77 OSCILLATOR

                                      771 Working

                                      An oscillator puts out an endless series of pulses The output

                                      constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      all digital circuits have some type of oscillator This stream of output pulses is often

                                      called a clock One of the most important features of any oscillator is its frequency stability

                                      or in other words its ability to provide a constant frequency output under varying load

                                      conditions Some of the factors that affect the frequency stability of an oscillator include

                                      temperature variations in the load and changes in the DC power supply Frequency stability

                                      of the output signal can be improved by the proper selection of the components used for the

                                      resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                      be obtained from normal LC and RC tank circuits

                                      In our project instead of 12MHz crystal 110592MHz is used because it can be

                                      divided to give you exact clock rates for most of the common baud rates for the UART

                                      especially for the higher speeds (9600 19200) These crystals are readily available and

                                      commonly used

                                      78 SWITCH

                                      781 WORKING

                                      The most familiar form of switch is a manually operated

                                      electromechanical device with one or more sets of electrical contacts

                                      Each set of contacts can be in one of two states either closed meaning

                                      the contacts are touching and electricity can flow between them or

                                      open meaning the contacts are separated and the switch is non

                                      conducting The mechanism actuating the transition between these two

                                      states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                      momentary (push-for on or push-for off) type

                                      782 USES

                                      In electronics a switch is an electrical component that can break an electrical

                                      circuit interrupting the current or diverting it from one conductor to another

                                      783 TESTING

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                      no connection Switch can tested by using multimeter in continuity range

                                      79 DARLINGTON PAIR IC (ULN2003a)

                                      791 WORKING

                                      The Darlington transistor (often called a Darlington pair) is a

                                      compound structure consisting of two bipolar transistors (either

                                      integrated or separated devices) connected in such a way that the

                                      current amplified by the first transistor is amplified further by the

                                      second one This configuration gives a much higher current gain than

                                      each transistor taken separately and in the case of integrated devices

                                      can take less space than two individual transistors because they can

                                      use a shared collector

                                      Integrated Darlington pairs come packaged singly in

                                      transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                      The Darlington transistor array used is ULN2003 Applications include relay

                                      drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                      drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                      to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                      for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                      792 FEATURES

                                      The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                      transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                      with common-cathode clamp diodes for switching inductive loads The collector-current

                                      rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                      higher current capability

                                      710 SERIES VOLTAGE REGULATER IC (78XX)

                                      7101 WORKING

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Voltage Regulator (regulator) usually having three legs converts varying input

                                      voltage and produces a constant regulated output voltage They are available in a variety of

                                      outputs

                                      The most common part numbers start with the numbers 78 or 79 and finish with two

                                      digits indicating the output voltage The number 78 represents positive voltage and 79

                                      negative one The 78XX series of voltage regulators are designed for positive input

                                      The LM78XX series typically has the ability to drive current up to 1A For

                                      application requirements up to 150mA 78LXX can be used As mentioned above the

                                      component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                      an output leg with the regulators voltage

                                      As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                      voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                      difference between the input and output appears as heat If the input voltage is unnecessarily

                                      high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                      sinking the regulator will shut down

                                      711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                      7111 WORKING

                                      The MAX-232 It includes a Charge Pump which generates

                                      +10V and -10V from a single 5v supply

                                      This IC also includes two receivers and two transmitters in

                                      the same package This is handy in many cases when we only want to

                                      use the Transmit and Receive data Lines We dont need to use two chips one for the

                                      receive line and one for the transmit There are also many variations of these devices The

                                      large value of capacitors are not only bulky but also expensive Therefore other devices are

                                      available which use smaller capacitors and even some with inbuilt capacitors However the

                                      MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                      Dual Charge-Pump Voltage Converter

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                      V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                      output

                                      712 OPTOCOUPLER IC (4N33)

                                      7121 WORKING

                                      In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                      photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                      between elements of a circuit typically a transmitter and a receiver while keeping them

                                      electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                      back to an electrical signal electrical contact along the path is broken

                                      Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                      essentially a combination of two distinct devices an optical transmitter typically a gallium

                                      arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                      light-triggered diac The two are separated by a transparent barrier which blocks any

                                      electrical current flow between the two but does allow the passage of light

                                      The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                      silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                      of isolation between driving and load circuits These Optocouplers can be used to replace

                                      reed and mercury relays with advantages of long life high speed switching and elimination

                                      of magnetic field

                                      713 MICROCONTROLLER IC (89V51 RD 2 )

                                      713 WORKING

                                      The P89V51RD2 is an 80C51 microcontroller with 64

                                      kB Flash and 1024 bytes of data RAM

                                      A key feature of the P89V51RD2 is its X2 mode option

                                      The design engineer can choose to run the application with the conventional 80C51 clock

                                      rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      achieve twice the throughput at the same clock frequency Another way to benefit from this

                                      feature is to keep the same performance by reducing the clock frequency by half thus

                                      dramatically reducing the EMI

                                      The Flash program memory supports both parallel programming and in serial In-

                                      System Programming (ISP) Parallel programming mode offers gang-programming at high

                                      speed reducing programming costs and time to market ISP allows a device to be

                                      reprogrammed in the end product under software control The capability to fieldupdate the

                                      application firmware makes a wide range of applications possible The P89V51RD2 is also

                                      In-Application Programmable (IAP) allowing the Flash program memory to be

                                      reconfigured even while the application is running

                                      714 RELIMATE CONNECTOR

                                      7141 WORKING

                                      These are wire to board type connectors used to facilitate

                                      proper and firm electrical connection between the relay card and

                                      microcontroller card

                                      The connector has following specifications

                                      No of Ways 2-20

                                      Voltage Rating 250V AC DC

                                      Current Rating 3A AC DC

                                      Contact Resistance 20mW max

                                      Insulation Resistance 1000MW min

                                      Dielectric Withstanding 1000V ACminute

                                      Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                      The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                      connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                      conflicts

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      715 RS-232 PORT CONNECTOR

                                      7151 WORKING

                                      Almost all digital devices which we use require either TTL

                                      or CMOS logic levels Therefore the first step to connecting a

                                      device to the RS-232 port is to transform the RS-232 levels back

                                      into 0 and 5 Volts This is done by RS-232 Level Converters

                                      Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                      Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                      The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                      problem in many instances where only a single supply of +5V is present

                                      CHAPTER 8

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      IMPLIMENTATION

                                      OF THE PCB

                                      Components layout designing

                                      Developing or Etching the PCB

                                      Other operations like Drilling Cutting Tinning

                                      81 IMPLIMENTATION OF THE PCB

                                      A proper PCB ensure that various circuit components are interconnected as per the

                                      circuit diagram once they have been placed on the PCB in their proper positions and

                                      subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                      base material to which is permanently attached a flat metallic network of conducting path

                                      whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                      for this project is single one

                                      The basic material used may be resin coated paper fiber glass ceramic and the flat

                                      board configuration however is most widely used and it may be of the nature of the single

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                      which ensures adequate and permanent low resistance coupling

                                      811 BOARD DESIGN

                                      PCB designed is the most important and requires great care during work In this case

                                      great care must be taken while tracing the circuit or layout on the board Because once PCB

                                      is designed it is virtually impossible to alter it While designing a circuit designer should

                                      take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                      unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                      also help to solve this problem when circuit is complicated

                                      812 THE MASTER DIAGRAM

                                      The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                      which is commonly made twice as the finished circuit since this makes the working on that

                                      much easier especially when circuit is complicated photography eventually reduces the

                                      size of diagram to that of the circuit before proceeding we must know some rules regarding

                                      the designing -

                                      a The space between the conductors must be strictly controlled to avoid the possibility

                                      of electrical discharges or unwanted capacitance The amount by which the mater

                                      diagram is to reduce in size is thus a critical deign feature

                                      b The conductor must be wider in those part of the circuits that are going to handle

                                      large current must be handle without undue temperature of conductors

                                      c The minimum width of copper should not generally be less than about 15mmThis

                                      is related to mechanical strength rather than electrical properties and it also ensure

                                      that strips remains securely bounded to the base material

                                      d The points where the component holes for component lead wire occurs must be sited

                                      to suit the dimensions of the component and dimensions between lead-out wire so

                                      that the components can be situated correctly on finished board The conductor is

                                      also main large at the point of holes

                                      813 PCB MAKING

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      When the mater diagram probable twice the size of real PCB has been evolved the

                                      test major step consists of etching or dissolving the unwanted metal from copper claded

                                      board to create a circuit as depicted by master diagram It must be stressed that very

                                      accurate checking master is essential at this stage Then the master point is mounted on a

                                      special frame on easy facing of a larger camera and with the aid of the very powerful

                                      illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                      developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                      brought into operation This comprises the camera body mounted so that sideways after

                                      each exposure In this way number of copies of the original master diagram is set out

                                      exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                      In case of simple and need of number of less PCB economic and advisable to use the

                                      following lab method of PCB making

                                      Planning The Circuit

                                      It is not a particular difficult There are several important factors that need not be

                                      taken into account if the finished device is to work properly we must consider gain factor

                                      and ensure that the input and output parts are sufficiently well isolated to avoid the

                                      possibility We must also ensure that conductors and components carrying high frequency

                                      current are well separated from the part of the circuit We are also to make sure that all

                                      components need to return to earth are properly connected and that possibility of common

                                      impedance arising earth returned

                                      Circuit is totally eliminated by making all earth as substantial possible consistent

                                      with nature of design Other factors that have to successfully studied include availability of

                                      adequate return points on board and itrsquos mounting from accessibility of switch connection

                                      made for mechanical fixing ventilation effect of vibration

                                      Cleaning The Board

                                      The copper side of the board must be thoroughly cleaned before circuit plan is

                                      transferred to it This is important because even slightest trace of graze (from figure of

                                      instance) will impure the etching process and when the circuit plan has been neatly

                                      transferred to copper in this manner the board is held under running tap and the allowed to

                                      dry before resist is applied

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Transforming the Plan

                                      Now once cleaning is done plan has to transfer on copper surface of PCB material

                                      A convenient way to do this is simply put the carbon paper between a copper surface of the

                                      board and working plan and carefully trace the lines of original plan with a ball pen

                                      Resist

                                      Resist is nothing more than a substrate that is unaffected by presence etching

                                      chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                      clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                      covered when resists the leaguer type of paints possess good resist properties but

                                      disadvantage of relatively long time taken for drying It is essential to resist through

                                      hardening before etching is started Nail polished are better as they quickly and are less

                                      difficult to remove

                                      To overcome this drying effect and to achieve the sharp edge of the trace on the

                                      PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                      short circulating due to paints are completely the avoid etching tapes and pads are available

                                      in different sizes

                                      Correcting Error

                                      When a result has been thoroughly hardened any errors that have been made can

                                      usually be corrected by gently scratching away with knife To ensure clear out lines round

                                      edges of copper conductors on board the resist must be applied with steady band

                                      Etching

                                      Next comes etching of unwanted copper amp whether a small single is all that is

                                      required as quantity of board to be produce certain precautions must be taken before

                                      operation is commenced the most used etch amp I ferrite chloride to this is added small

                                      quantity of HCL to accelerate But not critical as lab construction concerned A good

                                      etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                      grams of water

                                      Agitation

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                      the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                      laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                      gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                      temperature and thickness of copper foil

                                      Finishing Off

                                      When all unwanted copper is dissolved from areas between conductor board should

                                      be taken from an etchant amp washed in water The resist must be removed using proper

                                      solvent After this the copper surface must be polished with any kind of cleaner It should be

                                      seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                      PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                      This process is called Tinning This process of coating involve track with soldier

                                      Advantage of tinning the effect of environment of conductors then PCB is drilled

                                      ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                      Assembling On PCB

                                      After the holes are drilled the component have to be assembled on PCB before

                                      assembling the components it is necessary to clean soldering iron in order to get easy amp

                                      accurate soldering Removing impurity particles that are gathered on iron bit due to

                                      repetitive use cleans soldering iron

                                      CHAPTER 9

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      SOLDERING

                                      TECHNIQUE

                                      Technique for good soldering

                                      91 SOLDERING TECHNIQUE

                                      For soldering of any joints first the terminal to be soldered are cleaned to remove

                                      oxide film or dirt on it If required flux is applied on the points to be soldered

                                      Now the joint to be soldered is heated with the help of soldering iron Heat

                                      applied should be such that when solder wire is touched to joint it must melt

                                      quickly

                                      The joint and the soldering iron is held such that molten solder should flow

                                      smoothly over the joint

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      When joint is completely covered with molten solder the soldering iron is re-

                                      moved

                                      The joint is allowed to cool without any movement

                                      The bright shining solder indicates good soldering

                                      In case of dry solder joint a air gap remains in between the solder material and

                                      the joint It means that soldering is improper This is removed and again solder-

                                      ing is done

                                      Thus this way all the components are soldered on P C B

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 10

                                      PCB LAYOUTS

                                      Schematic diagram

                                      Bottom and top layout

                                      101 POWER SUPPLY CARD

                                      1011 SCHIMETIC DIAGRAM

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1012 LEGEND MARKING

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                      Fig1011 Schematic diagram of power supply card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1013TOP LAYER

                                      1014 BOTTOM LAYER

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                      Fig1013 Top layer of power supply

                                      card

                                      Fig1014 Schematic diagram of power supply card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      102 BATTERY CHARGER CARD

                                      1021 SCHEMATIC DIAGRAM

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                      Fig1021 Schematic diagram of battery charger card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      103 RELAY CARD

                                      1031 SCHIMETIC DIAGRAM

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                      Fig1031 Schematic diagram of Relay card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1032 RELAY CARD LEGEND MARKING

                                      1033 TOP LAYER

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                      Fig1032 Legend marking of Relay card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1034 BOTTOM LAYER

                                      104 MICROCONTROLER CARD

                                      1041 SCHIMETIC DIAGRAM

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                      Fig1034 Bottom layer of Relay card

                                      Fig1041 Schematic diagram of microcontroller card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1042 ALL LAYERS

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                      Fig1042 All layer of microcontroller card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 11

                                      INTRODUCTION

                                      OF SOFTWARE

                                      Keil (microVision 2)

                                      Eagle (Easily Applicable Graphical Layout Editor)

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      111 Keil (microVision 2)

                                      1111 Introduction to C51 Cross Compiler

                                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                      generates object code that matches the efficiency and speed of assembly programming

                                      Using a high-level language like C has many advantages over assembly language

                                      programming

                                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                      the memory structure of the 8051 CPU is desirable (but not necessary)

                                      Details like register allocation and addressing of the various memory types and data

                                      types is managed by the compiler

                                      Programs get a formal structure (which is imposed by the C programming language) and

                                      can be divided into separate functions This contributes to source code reusability as

                                      well as better overall application structure

                                      The ability to combine variable selection with specific operations improves program

                                      readability

                                      Keywords and operational functions that more nearly resemble the human thought

                                      process may be used

                                      Programming and program test time is drastically reduced

                                      The C run-time library contains many standard routines such as formatted output

                                      numeric conversions and floating-point arithmetic

                                      Existing program parts can be more easily included into new programs because of

                                      modular program construction techniques

                                      The language C is a very portable language (based on the ANSI standard) that enjoys

                                      wide popular support and is easily obtained for most systems Existing program

                                      investments can be quickly adapted to other processors as needed

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1112 Software Development Cycle in Keil

                                      When we use the Keil Software tools the

                                      project development cycle is roughly the same as

                                      it is for any other software development project

                                      1 Create a project select the target chip from the

                                      device database and configure the tool settings

                                      2 Create source files in C or assembly

                                      3 Build your application with the project

                                      manager

                                      4 Correct errors in source files

                                      5 Test the linked application A block diagram of

                                      the complete 8051 tool set may best illustrate the

                                      development cycle

                                      112 Eagle (Easily Applicable Graphical Layout Editor)

                                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                      1121 Schematic Editor

                                      In this one can develop amp design circuits for the required PCB

                                      1122 Layout Editor

                                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                      Fig 111 Software development in KEIL

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1123 Library Editor

                                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                      1124 Auto Router

                                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                                      the PCB tracks designed

                                      1125 Cam Processor

                                      This is used to finally print the various layers of the designed PCB viz Top Layer

                                      Bottom Layer Component Layer Masking Layer etc

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                      Start

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 12

                                      INTRODUCTION

                                      OF

                                      PROGRAMMING

                                      Flowchart of programming

                                      Program code

                                      121 Flowchart

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                      2

                                      flag9==1

                                      flag9=1

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                      flag11==1

                                      flag11=1 flag11=0 flag4=0

                                      REady_LED4=0

                                      Sw2_op (P01) ==0

                                      My delay (10)

                                      3 3

                                      flag2=1 disp2=1 k2=0

                                      3

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                      4

                                      flag11==1

                                      flag11=0 flag4=0 REady_LED4=0

                                      flag11=1

                                      My delay (10)

                                      flag3=1 disp3=1 k3=0

                                      k1==0||k2==0||k4==0

                                      Sw3_op (P02) ==0

                                      5

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                      flag5==1

                                      5

                                      flag11==1

                                      flag7=1

                                      flag7==1

                                      flag7=0 flag2=0 REady_LED2=0

                                      6

                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                      flag11=0 flag4=0 REady_LED4=0

                                      flag11=1

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                      6

                                      My delay (10)

                                      flag4=1 disp4=1 k4=0

                                      k1==0||k2==0||k3==0 flag5==1

                                      7

                                      Sw4_op (P03) ==0

                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                      7

                                      flag7==1

                                      flag9==1

                                      flag7=1

                                      flag7=0 flag2=0 REady_LED2=0

                                      flag9=0 flag3=0 REady_LED3=0

                                      flag9=1

                                      Sw5_op A(P04) ==0

                                      My delay (10)

                                      8

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                      9

                                      flag2==1

                                      flag3==1

                                      8

                                      flag1==1

                                      flag4==1 flag5=1 disp5=1

                                      flag9=1 disp5=1

                                      flag7=1 disp5=1

                                      flag11=1 disp5=1

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                      Sw6_op (P05) ==0

                                      My delay (10)

                                      flag2==1 ampamp flag7==1

                                      flag3==1 ampamp flag9==1 9

                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                      flag8=1 disp6=1

                                      10

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                      10

                                      flag4==1 ampamp flag11==1

                                      flag10=1 disp6=1

                                      flag12=1 disp6=1

                                      flag8==1

                                      flag10==1

                                      11

                                      flag6==1

                                      i++

                                      l++

                                      j++

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                      flag12==1

                                      M++

                                      11

                                      Stop

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      122 Program

                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                      define buzzerP2_0 buzzer indication

                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                      sbit sw5_op=P0^4 input switch5 for coin

                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                      output Led for indication

                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                      function prototype declaration

                                      void my_delay(unsigned int value) DELAY FUCTION

                                      void init_timer() timer 0 initialization function

                                      variable declaration

                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      start of main programme

                                      void main()

                                      init_timer() call it timer initialization function

                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                      start of while loop

                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                      condition for switch1

                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                      if(iltk) loop will repeat for desired time of charging

                                      if(igt=1000)

                                      buzzer=1 turn on buzzer if (ii==20)

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      REady_LED1=1 turn on ready indication of led1

                                      else if(ii==40)

                                      REady_LED1=0ii=0

                                      elseREady_LED1=0

                                      START_LED1=1

                                      else

                                      START_LED1=0

                                      k1=1 buzzer=0

                                      REady_LED1=0 flag1=0

                                      flag5=0flag6=0

                                      condition for switch2

                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                      REady_LED2=1 turn on ready 2 led indication

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      disp2=0

                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                      if(jltk)

                                      if(jgt1000) buzzer=1 if(jj==20)

                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                      elseREady_LED2=0

                                      START_LED2=1

                                      else START_LED2=0

                                      REady_LED2=0 k2=1 buzzer=0

                                      flag2=0flag7=0flag8=0

                                      j=0jj=0

                                      condition for switch 3

                                      if(flag3==1) check swich3 pressed

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      if(disp3==1 )

                                      REady_LED3=1 disp3=0

                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                      if(lltk)

                                      if(lgt1000) buzzer=1 if(ll==20)

                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                      elseREady_LED3=0

                                      START_LED3=1

                                      else START_LED3=0

                                      LED2=0 k3=1 buzzer=0

                                      REady_LED3=0 flag3=0

                                      flag9=0flag10=0

                                      l=0ll=0

                                      condition for switch 4

                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      REady_LED4=1 disp4=0

                                      if(flag11==1) check coin is pressed

                                      if(flag12==1) START is pressed

                                      if(mltk)

                                      if(mgt1000)

                                      buzzer=1 if(mm==20)

                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                      elseREady_LED4=0

                                      START_LED4=1

                                      else START_LED4=0

                                      buzzer=0 k4=1

                                      REady_LED4=0 flag4=0

                                      flag11=0flag12=0

                                      m=0mm=0

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      while(1)

                                      end of main programme

                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                      whenever specific time the interrupt will generate control will go in following function

                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if(sw1_op==0 ) ready switch flag for system1

                                      my_delay(10) CALL DELAY FUNCTION

                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                      if(flag7==1) SET THE FLAG

                                      flag7=1

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                      flag9=1

                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                      flag11=1

                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if(sw2_op==0 ) fready switch flag for system2

                                      my_delay (10)

                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                      if(flag5==1)

                                      flag5=1

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                      flag9=1

                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                      flag11=1

                                      elseflag11=0flag4=0REady_LED4=0

                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                      if(flag7==1)

                                      flag7=1

                                      else

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                      flag5=1

                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                      flag11=1

                                      elseflag11=0flag4=0REady_LED4=0

                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                      if(flag7==1)

                                      flag7=1

                                      elseflag7=0

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      flag2=0REady_LED2=0 if(flag5==1)

                                      flag5=1

                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                      flag9=1

                                      elseflag9=0flag3=0REady_LED3=0

                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                      if(flag6==1)

                                      i++ if (igt1000) ii++

                                      if (flag8==1)

                                      j++ if(jgt1000) jj++

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      if (flag10==1)

                                      l++ if (lgt1000) ll++

                                      if (flag12==1)

                                      m++ if (mgt1000) mm++

                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 13

                                      TROUBLE SHOOT

                                      Troubleshoot

                                      131 TROUBLE SHOOT

                                      A newly assembled circuit does not work may be due to -

                                      Faulty components

                                      Improper soldering

                                      Wrong connections

                                      Also any stop in working after some period may be due to -

                                      Component failure

                                      Supply failure

                                      Damaging of PCB

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Fault finding is very essential if you want the circuit to operate properly

                                      If a newly assembled circuit is not working properly check all the components and

                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                      proper soldering

                                      If faults are not observed during physical observations one should proceed for Hot

                                      test ie Voltage measurement at different points for example at Input terminal etc

                                      Resistance measurement is also done which is known as Dry test

                                      During this project work some green LEDs was not glow then we checked it

                                      continuity and replace it

                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                      heated after starting the project It happens because of some soldering points are shorted

                                      during soldering PCB We solved that problem

                                      CHAPTER 14

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      ADVANTAGES OF

                                      THE PROJECT

                                      Advantages

                                      141 ADVANTAGES OF THE PROJECT

                                      Simple and hand efficient Microcontroller based system

                                      Fast charging capacity

                                      Simple to operate

                                      Ease of mobility

                                      Facilitates connectivity for 90 of cellular phones

                                      Less expensive

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Reduced man power

                                      Low power consumption

                                      It can offer emergency charging for 4sets of handsets synchronously

                                      CHAPTER 15

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      DISADVANTAGES

                                      OF THE PROJECT

                                      Disadvantages

                                      151 DISADVANTAGES OF THE PROJECT

                                      It requires mains supply to work project

                                      Due to limited charging channels till now there may be a possibility that

                                      mobile phones of few brands cannot be connected for charging For this

                                      purpose we have to use separate connectors for that specific brand differently

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                      min

                                      It does not have battery backup therefore it cannot be portable

                                      CHAPTER 16

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      APPLICATIONS OF

                                      THE PROJECT

                                      Application

                                      161 APPLICATIONS OF THE PROJECT

                                      The coin based mobile phone charger is very useful to public for using coin to

                                      charge for the mobile phone in any places

                                      It is used for emergency charging purposes

                                      It can be installed in malls railway stations bus stops and other public

                                      places

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      The charger offers a unique revenue opportunity for a vast range of

                                      businesses - from airports to pubs from universities to health clubs virtually

                                      any location where there is a high footfall creating a large number of

                                      potential users

                                      It can be installed in offices and collages for pay charging facility

                                      CHAPTER 17

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      FUTURE

                                      DEVELOPMENT OF

                                      THE PROJECT

                                      FUTURE DEVELOPMENT OF THE PROJECT

                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                      This project is very useful to people who are using mobile phone without charging

                                      condition in public places

                                      It will use with a stereo advertisement carrier that can display video advertisement

                                      It will provide battery backup for make it portable

                                      It will also provide SMS system in future

                                      We can also increase the charging time by editing software of the project

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 18

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      COST ANALYSIS

                                      OF THE PROJECT

                                      COST ANALYSIS OF THE PROJECT

                                      181 COST ANALYSIS OF THE PROJECT

                                      1811 Component list for power supply card

                                      Footprint Quantity Designators Rate

                                      Resistor

                                      22K 1 R2 1

                                      1K 1 R1 1

                                      Capacitor

                                      1000uf25V 1 C5 10

                                      2200uf25V 1 C1 10

                                      022uf 2 C6 C2 1

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                      Table 1811 Component list for power supply card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      01uf 2 C4 C3 1

                                      IC

                                      BRIDGE W10 2 BR2 BR1 10

                                      L7812CV (TO-220) 1 U2 8

                                      L7805CV (TO-220) 1 U1 8

                                      Connector

                                      CON PHO 2PIN 2 J3 J2 16

                                      CON PHO 3PIN 1 J1 12

                                      LED3mm red 2 L1 L2 15

                                      Heat sink (TO-220) 2 16

                                      Total 955

                                      1812 Component list for battery charger card

                                      Footprint Quantity Rate

                                      Capacitor

                                      2200uf25V 1 1000

                                      022uf 4 100

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      01uf 4 100

                                      IC

                                      BRIDGE W10 1 500

                                      L7805CV (TO-220) 4 3200

                                      Connector

                                      CON PHO 2PIN 1 800

                                      Relimate 2 pin 1 400

                                      relimate 3 pin 4 2000

                                      Heat sink (TO-220) 4 1200

                                      TOTAL 9300

                                      1813 Component list for Relay card

                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                      Table 1812Component list for battery charger card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                      Total 18900

                                      1814Component list for controller card

                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                      Table 1813Component list for relay card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                      total 27000

                                      1815 Miscellaneous material

                                      Material Quantity Rate

                                      electronic item

                                      Transformer

                                      TXR1 0-9-15 1 20000

                                      0-9 1A

                                      0-15 100mA

                                      TXR2 0-9 1 16500

                                      0-9 1A

                                      Proximity switch 1 20000

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                      Table 1814Component list for microcontroller card

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Red push bottom 4 4000

                                      Green push button 1 1000

                                      Red led 5mm 4 800

                                      Green led 5mm 4 800

                                      Led holder 8 1600

                                      Copper clad 2 4000

                                      3 core cable 1 meter 1500

                                      3 pin plug 1 3000

                                      2 pin relimate wire 19 9000

                                      3 pin relimate wire 5 3750

                                      4 pin relimate wire 2 2000

                                      mechanical items

                                      Enclosure 1 25000

                                      Acrylic sheet 2 X 1 30000

                                      12mm cable gland 1 1000

                                      Screw 3mm 33 2000

                                      Screw 35mm 6 2400

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      10 mm spacers 100 1500

                                      10mm insert to stud 50 10000

                                      cable tie 2500

                                      Total 162350

                                      CHAPTER 19

                                      APPENDIX

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                      Table 1815Component list for miscellaneous material

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      APPENDIX

                                      191 APPENDIX

                                      1911 78xx IC datasheet

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1912 W10 datasheet

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1913 4n33 IC datasheet

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                      1914 MAX 232

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1915 ULN2003a IC datasheet

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      1916 89V51RD2 IC datasheet

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 20

                                      CONCLUSION

                                      CONCLUSION

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      201 CONCLUSION

                                      The coin-operated mobile phone charger is already successfully installed in

                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                      installed in any business premises

                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                      from airports to pubs from universities to health clubs virtually any location where there is

                                      a high footfall creating a large number of potential users

                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                      extend low mobile phone talk time provide battery charging

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 21

                                      IMAGES OF THE

                                      PROJECT

                                      Images of the project

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      211 IMAGES OF THE PROJECT

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                      fig211 lsquoCoin operated mobile battery charger

                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Fig 216 Relay driver circuit

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                      Fig 213 Constant voltage battery charger circuit

                                      Fig214 Power supply circuit

                                      Fig215 Metal detector proximity switch

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Fig217 Microcontroller circuit

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      Fig228 coin operated mobile battery charger project presentation

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      CHAPTER 22

                                      BIBILOGRAPHY

                                      BIBLIOGRAPHY

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                      221 BIBLIOGRAPHY

                                      BOOKS

                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                      INTERNET LINKS

                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                      • CHAPTER 1

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Input from the controller is connected to the relay card through connector J1 which

                                        carries input signal for CH1 to CH4 to the base of integrated Darlington pair switch IC U1

                                        pin number 1 to 4 and op is taken on the opposite pins ie pin 16 to 13

                                        These outputs are connected to one end of the relay coil RL1 to RL4 ie pin no2 of

                                        relay and other end of coil ie pin no5 is connected to +12V with A LED (J3 J5 J7 J9) in

                                        series as shown in figureJ11 denoted as CHARGER IN carries the charging voltage +V

                                        and GND (ground) where +V is commonly applied to pin 1 ie COM (common) contact of

                                        relay and GND is shorted with pin1 of J4 J6 J8 and J10 Pin no 2 of J4 is connected to

                                        NO(normally open)contact of RL1 ie pin no3in same way pin 2 of J6 is connected to pin

                                        3 of RL2 pin 2 of J8 is connected to pin 3 of RL3 pin 2 of J10 is connected to pin 3 of

                                        RL4 Pin no 8 of IC U1 is grounded and pin no9 which is COM is supplied with +12V J2

                                        is used to connect power supply to relay card

                                        533 WORKING

                                        While taking Relay1 (RL1) into consideration we will discuss the working of relay

                                        card Initially there is no signal or logic 0 on the pin1 of IC U1 hence the internal transistor

                                        of the IC are in cut off region which causes an open circuit so there is no current flow

                                        flowing through the relay coil hence the relay is inactive When a high signal or logic 1 is

                                        applied to the two pin1 of IC U1 the internal transistor goes in to active region and

                                        completes the path ie provide ground to the relay coil so the current flows through the

                                        LED activating the relay

                                        As the current flows through the relay coil it gets energized and switch over the

                                        contacts ie common and normally open contact get connected and provide a path to flow

                                        current from J11 ie charger into the load connected at J4 hence the cell phone charging

                                        process starts The same above process is applies for all relays If LED is fused or

                                        damaged the path will be open and relay will not be energized and if relay is damaged the

                                        led will not be illuminated So the LED here is used as a FAULT indicator and a

                                        CHARGING ON indicator

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 20

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        54 MICROCONTORLLER CIRCUIT

                                        541 CIRCUIT DIAGRAM

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        542 CIRCUIT DIAGRAM EXPLANATION

                                        CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                        the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                        port P04 through J4 and START switch is connected to port P05 through SW5

                                        Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                        P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                        Output for relay card is taken on port P14 to P17

                                        Components C1 R1 and push button S1 forms reset circuit which provides a power

                                        on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                        110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                        22pf capacitor used as loading capacitor for crystal

                                        Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                        RN2 resistance network

                                        IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                        the proximity switch and microcontroller and convert its output readable to microcontroller

                                        IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                        communication between PC and a microcontroller through connector J3

                                        Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                        communication process

                                        Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                        power supply connection

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                        P00 = switch1 for channel 1

                                        P01 = switch2 for channel 2

                                        P02 = switch3 for channel 3

                                        P03 = switch4 for channel 4

                                        P04 = switch5 for coin input sensor (proximity switch)

                                        P05 = switch6 for start charging

                                        P10 = channel 1 red LED1 (ready system)

                                        P11 = channel 2 red LED2 (ready system2)

                                        P12 = channel 3 red LED3 (ready system3)

                                        P13 = channel 4 red LED4 (ready system4)

                                        P14 = channel 1 relay (start system1)

                                        P15 = channel 2 relay (start system2)

                                        P16 = channel 3 relay (start system3)

                                        P17 = channel 4 relay (start system4)

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 6

                                        LIST OF THE

                                        COMPONENTS

                                        List of the components

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        61 LIST OF THE COMPONETS

                                        RESISTORS

                                        CAPACITORS

                                        LIGHT EMITING DIODES (LEDS)- Green Red

                                        RELAYrsquoS-

                                        TRANSFORMERS

                                        RECTIFIER BRIDGES (W 10)

                                        OSCILLATOR

                                        SWITCHES- Push switches

                                        DARLINGTON PAIR IC (ULN2003a)

                                        SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                        SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                        OPTOCOUPLER IC (4N33)

                                        MICROCONTROLLER IC (89V51 RD2)

                                        RELIMATE CONNECTOR- 2 pin amp 4 pin

                                        RS-232 PORT CONNECTOR

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 7

                                        INTRODUCTION

                                        OF COMPONENTS

                                        Working of components

                                        Features or Uses of components

                                        Testing of components

                                        71 RESISTOR

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        711 WORKING

                                        Resistors limit current Resistors are considered to be the most used and the most

                                        important component of all the electronic circuits Resistors resist the flow of electrical

                                        current The higher the value of resistance (measured in ohms)

                                        the lower the current will be

                                        712 TESTING

                                        Read the indicated color code value then select the OHM-scale within but not way

                                        below the indicated value A resistor is good if its resistance is close to the indicated

                                        Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                        all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                        ohmmeter scale settings resistor is shorted

                                        713 SPECIFICATIONS

                                        To completely specify a resistors characteristics requires knowledge of the following

                                        parameters-

                                        bull Value

                                        bull Tolerance

                                        bull Temperature Coefficient

                                        bull Power Rating

                                        The specification of a resistor may be marked on its surface using either of two

                                        systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                        the second more recent system uses a combination of alpha-numeric characters

                                        7 2 CAPACITOR

                                        721 WORKING

                                        When DC voltage is applied to the capacitor an electric charge is stored on each

                                        electrode While the capacitor is charging up current flows The current will stop flowing

                                        when the capacitor has fully charged Capacitors find use

                                        in circuits for a variety of purposes They are used in

                                        time delay generation RC circuits In power supplies for filtering and power supply

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        decoupling as blocking capacitors for power factor correction and motor starting in LC

                                        tank circuits and so on

                                        722 TESTING

                                        To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                        negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                        A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                        and moves back again to infinite resistance position A defective indication for an

                                        electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                        which is an indication that the capacitor is shorted

                                        73 LIGHT EMITING DIODE (LED)

                                        731 WORKING

                                        LEDs are special diodes that emit light when

                                        connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                        indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                        the heart of an LED the semi-conductor chip

                                        In our project Green LED are used here for mainly two purpose

                                        a Charging ON indication (when ON)

                                        b Channel fault indication (always OFF)

                                        732 TESTING

                                        The good and working LED will then light up or glow a busted LED will not LEDs

                                        must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                        1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                        directly connected to a battery or power supply It will be destroyed the LED

                                        733 FEATURES

                                        Single color

                                        High bright output

                                        Low power consumption

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        High reliability and long life

                                        734 Descriptions

                                        Dice material GaInN

                                        Emitting Color Super Bright White

                                        Device Outlineφ5mm Round Type

                                        Lens Type Water Clear

                                        74 RELAY

                                        741 WORKING

                                        A relay is an electrically operated switch Current

                                        flowing through the coil of the relay creates a magnetic field

                                        which attracts a lever and changes the switch contacts The coil

                                        current can be on or off so relays have two switch positions and

                                        most have double throw (changeover) switch contacts

                                        Relays are like remote control switches and are used in

                                        many applications because of their relative simplicity long life

                                        and proven high reliability

                                        742 USES

                                        The main operation of a relay comes in places where only a low-power signal can be

                                        used to control a circuit

                                        It is also used in places where only one signal can be used to control a lot of circuits

                                        The application of relays started during the invention of telephones They played an

                                        important role in switching calls in telephone exchanges They were also used in

                                        long distance telegraphy They were used to switch the signal coming from one

                                        source to another destination

                                        743 TESTING

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        A relay will usually have a coil pole terminal and a set of

                                        contacts The set of contacts that are open when the relay is not

                                        energized are called normally open (NO) contacts and the set of

                                        contacts that are closed when the relay is not energized are called

                                        normally closed (NC) contacts The following steps can be used to perform the testing of

                                        the relay using a multimeter

                                        Keep the multimeter in the continuity check mode

                                        Check for continuity between the NC contacts and pole

                                        Check for discontinuity between NO contacts and the pole

                                        Now energies the relay using the rated voltage For example use a 9V battery for

                                        energizing a 9V relay The relay will engage with clicking sound

                                        Now check for continuity between NO contacts and pole

                                        Also check for discontinuity between NC contacts and pole

                                        As a final test measure the resistance of the relay coil using a multimeter and check

                                        whether it is matching to the value stated by the manufacturer

                                        If all the above tests are positive we can conclude that the relay is healthy

                                        75 TRANSFORMER

                                        751 WORKING

                                        A transformer is a device that transfers electrical energy

                                        from one circuit to another through inductively coupled

                                        electrical conductors A changing current in the first circuit (the

                                        primary) creates a changing magnetic field

                                        This changing magnetic field induces a changing voltage in the second circuit (the

                                        secondary) This effect is called mutual induction

                                        If a load is connected to the secondary circuit electric charge will flow in the

                                        secondary winding of the transformer and transfer energy from the primary circuit to the

                                        load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                        of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                        number of primary turns

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        By appropriate selection of the numbers of turns a transformer thus allows an

                                        alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                        making it less

                                        752 TESTING

                                        1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                        scale and then adjusting the knob to verify its reading is an easy step to the

                                        reading of the ohm

                                        2 To check the resistance of the coil unplug or unsolder the leads of the

                                        transformer from its circuit and measure the resistance of each coil

                                        3 The next step is to test each coil for shorts to other coils

                                        76 RECTIFIER BRIDGE (W 10)

                                        761 WORKING

                                        A diode bridge rectifier is a device for converting AC or

                                        alternating current electricity into DC or direct current AC

                                        electricity goes from positive to negative constantly whereas DC

                                        always flows in the same direction

                                        AC electricity is more efficient to transmit and easier to

                                        convert into different voltages However most appliances need DC current to run A diode

                                        bridge rectifier is the most common type of power supply used to provide this current In

                                        our project W10 is a bridge rectifier which provides on single semiconductor chip

                                        77 OSCILLATOR

                                        771 Working

                                        An oscillator puts out an endless series of pulses The output

                                        constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        all digital circuits have some type of oscillator This stream of output pulses is often

                                        called a clock One of the most important features of any oscillator is its frequency stability

                                        or in other words its ability to provide a constant frequency output under varying load

                                        conditions Some of the factors that affect the frequency stability of an oscillator include

                                        temperature variations in the load and changes in the DC power supply Frequency stability

                                        of the output signal can be improved by the proper selection of the components used for the

                                        resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                        be obtained from normal LC and RC tank circuits

                                        In our project instead of 12MHz crystal 110592MHz is used because it can be

                                        divided to give you exact clock rates for most of the common baud rates for the UART

                                        especially for the higher speeds (9600 19200) These crystals are readily available and

                                        commonly used

                                        78 SWITCH

                                        781 WORKING

                                        The most familiar form of switch is a manually operated

                                        electromechanical device with one or more sets of electrical contacts

                                        Each set of contacts can be in one of two states either closed meaning

                                        the contacts are touching and electricity can flow between them or

                                        open meaning the contacts are separated and the switch is non

                                        conducting The mechanism actuating the transition between these two

                                        states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                        momentary (push-for on or push-for off) type

                                        782 USES

                                        In electronics a switch is an electrical component that can break an electrical

                                        circuit interrupting the current or diverting it from one conductor to another

                                        783 TESTING

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                        no connection Switch can tested by using multimeter in continuity range

                                        79 DARLINGTON PAIR IC (ULN2003a)

                                        791 WORKING

                                        The Darlington transistor (often called a Darlington pair) is a

                                        compound structure consisting of two bipolar transistors (either

                                        integrated or separated devices) connected in such a way that the

                                        current amplified by the first transistor is amplified further by the

                                        second one This configuration gives a much higher current gain than

                                        each transistor taken separately and in the case of integrated devices

                                        can take less space than two individual transistors because they can

                                        use a shared collector

                                        Integrated Darlington pairs come packaged singly in

                                        transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                        The Darlington transistor array used is ULN2003 Applications include relay

                                        drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                        drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                        to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                        for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                        792 FEATURES

                                        The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                        transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                        with common-cathode clamp diodes for switching inductive loads The collector-current

                                        rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                        higher current capability

                                        710 SERIES VOLTAGE REGULATER IC (78XX)

                                        7101 WORKING

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Voltage Regulator (regulator) usually having three legs converts varying input

                                        voltage and produces a constant regulated output voltage They are available in a variety of

                                        outputs

                                        The most common part numbers start with the numbers 78 or 79 and finish with two

                                        digits indicating the output voltage The number 78 represents positive voltage and 79

                                        negative one The 78XX series of voltage regulators are designed for positive input

                                        The LM78XX series typically has the ability to drive current up to 1A For

                                        application requirements up to 150mA 78LXX can be used As mentioned above the

                                        component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                        an output leg with the regulators voltage

                                        As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                        voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                        difference between the input and output appears as heat If the input voltage is unnecessarily

                                        high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                        sinking the regulator will shut down

                                        711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                        7111 WORKING

                                        The MAX-232 It includes a Charge Pump which generates

                                        +10V and -10V from a single 5v supply

                                        This IC also includes two receivers and two transmitters in

                                        the same package This is handy in many cases when we only want to

                                        use the Transmit and Receive data Lines We dont need to use two chips one for the

                                        receive line and one for the transmit There are also many variations of these devices The

                                        large value of capacitors are not only bulky but also expensive Therefore other devices are

                                        available which use smaller capacitors and even some with inbuilt capacitors However the

                                        MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                        Dual Charge-Pump Voltage Converter

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                        V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                        output

                                        712 OPTOCOUPLER IC (4N33)

                                        7121 WORKING

                                        In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                        photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                        between elements of a circuit typically a transmitter and a receiver while keeping them

                                        electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                        back to an electrical signal electrical contact along the path is broken

                                        Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                        essentially a combination of two distinct devices an optical transmitter typically a gallium

                                        arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                        light-triggered diac The two are separated by a transparent barrier which blocks any

                                        electrical current flow between the two but does allow the passage of light

                                        The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                        silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                        of isolation between driving and load circuits These Optocouplers can be used to replace

                                        reed and mercury relays with advantages of long life high speed switching and elimination

                                        of magnetic field

                                        713 MICROCONTROLLER IC (89V51 RD 2 )

                                        713 WORKING

                                        The P89V51RD2 is an 80C51 microcontroller with 64

                                        kB Flash and 1024 bytes of data RAM

                                        A key feature of the P89V51RD2 is its X2 mode option

                                        The design engineer can choose to run the application with the conventional 80C51 clock

                                        rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        achieve twice the throughput at the same clock frequency Another way to benefit from this

                                        feature is to keep the same performance by reducing the clock frequency by half thus

                                        dramatically reducing the EMI

                                        The Flash program memory supports both parallel programming and in serial In-

                                        System Programming (ISP) Parallel programming mode offers gang-programming at high

                                        speed reducing programming costs and time to market ISP allows a device to be

                                        reprogrammed in the end product under software control The capability to fieldupdate the

                                        application firmware makes a wide range of applications possible The P89V51RD2 is also

                                        In-Application Programmable (IAP) allowing the Flash program memory to be

                                        reconfigured even while the application is running

                                        714 RELIMATE CONNECTOR

                                        7141 WORKING

                                        These are wire to board type connectors used to facilitate

                                        proper and firm electrical connection between the relay card and

                                        microcontroller card

                                        The connector has following specifications

                                        No of Ways 2-20

                                        Voltage Rating 250V AC DC

                                        Current Rating 3A AC DC

                                        Contact Resistance 20mW max

                                        Insulation Resistance 1000MW min

                                        Dielectric Withstanding 1000V ACminute

                                        Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                        The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                        connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                        conflicts

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        715 RS-232 PORT CONNECTOR

                                        7151 WORKING

                                        Almost all digital devices which we use require either TTL

                                        or CMOS logic levels Therefore the first step to connecting a

                                        device to the RS-232 port is to transform the RS-232 levels back

                                        into 0 and 5 Volts This is done by RS-232 Level Converters

                                        Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                        Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                        The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                        problem in many instances where only a single supply of +5V is present

                                        CHAPTER 8

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        IMPLIMENTATION

                                        OF THE PCB

                                        Components layout designing

                                        Developing or Etching the PCB

                                        Other operations like Drilling Cutting Tinning

                                        81 IMPLIMENTATION OF THE PCB

                                        A proper PCB ensure that various circuit components are interconnected as per the

                                        circuit diagram once they have been placed on the PCB in their proper positions and

                                        subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                        base material to which is permanently attached a flat metallic network of conducting path

                                        whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                        for this project is single one

                                        The basic material used may be resin coated paper fiber glass ceramic and the flat

                                        board configuration however is most widely used and it may be of the nature of the single

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                        which ensures adequate and permanent low resistance coupling

                                        811 BOARD DESIGN

                                        PCB designed is the most important and requires great care during work In this case

                                        great care must be taken while tracing the circuit or layout on the board Because once PCB

                                        is designed it is virtually impossible to alter it While designing a circuit designer should

                                        take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                        unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                        also help to solve this problem when circuit is complicated

                                        812 THE MASTER DIAGRAM

                                        The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                        which is commonly made twice as the finished circuit since this makes the working on that

                                        much easier especially when circuit is complicated photography eventually reduces the

                                        size of diagram to that of the circuit before proceeding we must know some rules regarding

                                        the designing -

                                        a The space between the conductors must be strictly controlled to avoid the possibility

                                        of electrical discharges or unwanted capacitance The amount by which the mater

                                        diagram is to reduce in size is thus a critical deign feature

                                        b The conductor must be wider in those part of the circuits that are going to handle

                                        large current must be handle without undue temperature of conductors

                                        c The minimum width of copper should not generally be less than about 15mmThis

                                        is related to mechanical strength rather than electrical properties and it also ensure

                                        that strips remains securely bounded to the base material

                                        d The points where the component holes for component lead wire occurs must be sited

                                        to suit the dimensions of the component and dimensions between lead-out wire so

                                        that the components can be situated correctly on finished board The conductor is

                                        also main large at the point of holes

                                        813 PCB MAKING

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        When the mater diagram probable twice the size of real PCB has been evolved the

                                        test major step consists of etching or dissolving the unwanted metal from copper claded

                                        board to create a circuit as depicted by master diagram It must be stressed that very

                                        accurate checking master is essential at this stage Then the master point is mounted on a

                                        special frame on easy facing of a larger camera and with the aid of the very powerful

                                        illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                        developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                        brought into operation This comprises the camera body mounted so that sideways after

                                        each exposure In this way number of copies of the original master diagram is set out

                                        exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                        In case of simple and need of number of less PCB economic and advisable to use the

                                        following lab method of PCB making

                                        Planning The Circuit

                                        It is not a particular difficult There are several important factors that need not be

                                        taken into account if the finished device is to work properly we must consider gain factor

                                        and ensure that the input and output parts are sufficiently well isolated to avoid the

                                        possibility We must also ensure that conductors and components carrying high frequency

                                        current are well separated from the part of the circuit We are also to make sure that all

                                        components need to return to earth are properly connected and that possibility of common

                                        impedance arising earth returned

                                        Circuit is totally eliminated by making all earth as substantial possible consistent

                                        with nature of design Other factors that have to successfully studied include availability of

                                        adequate return points on board and itrsquos mounting from accessibility of switch connection

                                        made for mechanical fixing ventilation effect of vibration

                                        Cleaning The Board

                                        The copper side of the board must be thoroughly cleaned before circuit plan is

                                        transferred to it This is important because even slightest trace of graze (from figure of

                                        instance) will impure the etching process and when the circuit plan has been neatly

                                        transferred to copper in this manner the board is held under running tap and the allowed to

                                        dry before resist is applied

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Transforming the Plan

                                        Now once cleaning is done plan has to transfer on copper surface of PCB material

                                        A convenient way to do this is simply put the carbon paper between a copper surface of the

                                        board and working plan and carefully trace the lines of original plan with a ball pen

                                        Resist

                                        Resist is nothing more than a substrate that is unaffected by presence etching

                                        chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                        clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                        covered when resists the leaguer type of paints possess good resist properties but

                                        disadvantage of relatively long time taken for drying It is essential to resist through

                                        hardening before etching is started Nail polished are better as they quickly and are less

                                        difficult to remove

                                        To overcome this drying effect and to achieve the sharp edge of the trace on the

                                        PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                        short circulating due to paints are completely the avoid etching tapes and pads are available

                                        in different sizes

                                        Correcting Error

                                        When a result has been thoroughly hardened any errors that have been made can

                                        usually be corrected by gently scratching away with knife To ensure clear out lines round

                                        edges of copper conductors on board the resist must be applied with steady band

                                        Etching

                                        Next comes etching of unwanted copper amp whether a small single is all that is

                                        required as quantity of board to be produce certain precautions must be taken before

                                        operation is commenced the most used etch amp I ferrite chloride to this is added small

                                        quantity of HCL to accelerate But not critical as lab construction concerned A good

                                        etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                        grams of water

                                        Agitation

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                        the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                        laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                        gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                        temperature and thickness of copper foil

                                        Finishing Off

                                        When all unwanted copper is dissolved from areas between conductor board should

                                        be taken from an etchant amp washed in water The resist must be removed using proper

                                        solvent After this the copper surface must be polished with any kind of cleaner It should be

                                        seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                        PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                        This process is called Tinning This process of coating involve track with soldier

                                        Advantage of tinning the effect of environment of conductors then PCB is drilled

                                        ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                        Assembling On PCB

                                        After the holes are drilled the component have to be assembled on PCB before

                                        assembling the components it is necessary to clean soldering iron in order to get easy amp

                                        accurate soldering Removing impurity particles that are gathered on iron bit due to

                                        repetitive use cleans soldering iron

                                        CHAPTER 9

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        SOLDERING

                                        TECHNIQUE

                                        Technique for good soldering

                                        91 SOLDERING TECHNIQUE

                                        For soldering of any joints first the terminal to be soldered are cleaned to remove

                                        oxide film or dirt on it If required flux is applied on the points to be soldered

                                        Now the joint to be soldered is heated with the help of soldering iron Heat

                                        applied should be such that when solder wire is touched to joint it must melt

                                        quickly

                                        The joint and the soldering iron is held such that molten solder should flow

                                        smoothly over the joint

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        When joint is completely covered with molten solder the soldering iron is re-

                                        moved

                                        The joint is allowed to cool without any movement

                                        The bright shining solder indicates good soldering

                                        In case of dry solder joint a air gap remains in between the solder material and

                                        the joint It means that soldering is improper This is removed and again solder-

                                        ing is done

                                        Thus this way all the components are soldered on P C B

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 10

                                        PCB LAYOUTS

                                        Schematic diagram

                                        Bottom and top layout

                                        101 POWER SUPPLY CARD

                                        1011 SCHIMETIC DIAGRAM

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1012 LEGEND MARKING

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                        Fig1011 Schematic diagram of power supply card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1013TOP LAYER

                                        1014 BOTTOM LAYER

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                        Fig1013 Top layer of power supply

                                        card

                                        Fig1014 Schematic diagram of power supply card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        102 BATTERY CHARGER CARD

                                        1021 SCHEMATIC DIAGRAM

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                        Fig1021 Schematic diagram of battery charger card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        103 RELAY CARD

                                        1031 SCHIMETIC DIAGRAM

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                        Fig1031 Schematic diagram of Relay card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1032 RELAY CARD LEGEND MARKING

                                        1033 TOP LAYER

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                        Fig1032 Legend marking of Relay card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1034 BOTTOM LAYER

                                        104 MICROCONTROLER CARD

                                        1041 SCHIMETIC DIAGRAM

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                        Fig1034 Bottom layer of Relay card

                                        Fig1041 Schematic diagram of microcontroller card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1042 ALL LAYERS

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                        Fig1042 All layer of microcontroller card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 11

                                        INTRODUCTION

                                        OF SOFTWARE

                                        Keil (microVision 2)

                                        Eagle (Easily Applicable Graphical Layout Editor)

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        111 Keil (microVision 2)

                                        1111 Introduction to C51 Cross Compiler

                                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                        generates object code that matches the efficiency and speed of assembly programming

                                        Using a high-level language like C has many advantages over assembly language

                                        programming

                                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                        the memory structure of the 8051 CPU is desirable (but not necessary)

                                        Details like register allocation and addressing of the various memory types and data

                                        types is managed by the compiler

                                        Programs get a formal structure (which is imposed by the C programming language) and

                                        can be divided into separate functions This contributes to source code reusability as

                                        well as better overall application structure

                                        The ability to combine variable selection with specific operations improves program

                                        readability

                                        Keywords and operational functions that more nearly resemble the human thought

                                        process may be used

                                        Programming and program test time is drastically reduced

                                        The C run-time library contains many standard routines such as formatted output

                                        numeric conversions and floating-point arithmetic

                                        Existing program parts can be more easily included into new programs because of

                                        modular program construction techniques

                                        The language C is a very portable language (based on the ANSI standard) that enjoys

                                        wide popular support and is easily obtained for most systems Existing program

                                        investments can be quickly adapted to other processors as needed

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1112 Software Development Cycle in Keil

                                        When we use the Keil Software tools the

                                        project development cycle is roughly the same as

                                        it is for any other software development project

                                        1 Create a project select the target chip from the

                                        device database and configure the tool settings

                                        2 Create source files in C or assembly

                                        3 Build your application with the project

                                        manager

                                        4 Correct errors in source files

                                        5 Test the linked application A block diagram of

                                        the complete 8051 tool set may best illustrate the

                                        development cycle

                                        112 Eagle (Easily Applicable Graphical Layout Editor)

                                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                        1121 Schematic Editor

                                        In this one can develop amp design circuits for the required PCB

                                        1122 Layout Editor

                                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                        Fig 111 Software development in KEIL

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1123 Library Editor

                                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                        1124 Auto Router

                                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                                        the PCB tracks designed

                                        1125 Cam Processor

                                        This is used to finally print the various layers of the designed PCB viz Top Layer

                                        Bottom Layer Component Layer Masking Layer etc

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                        Start

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 12

                                        INTRODUCTION

                                        OF

                                        PROGRAMMING

                                        Flowchart of programming

                                        Program code

                                        121 Flowchart

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                        2

                                        flag9==1

                                        flag9=1

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                        flag11==1

                                        flag11=1 flag11=0 flag4=0

                                        REady_LED4=0

                                        Sw2_op (P01) ==0

                                        My delay (10)

                                        3 3

                                        flag2=1 disp2=1 k2=0

                                        3

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                        4

                                        flag11==1

                                        flag11=0 flag4=0 REady_LED4=0

                                        flag11=1

                                        My delay (10)

                                        flag3=1 disp3=1 k3=0

                                        k1==0||k2==0||k4==0

                                        Sw3_op (P02) ==0

                                        5

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                        flag5==1

                                        5

                                        flag11==1

                                        flag7=1

                                        flag7==1

                                        flag7=0 flag2=0 REady_LED2=0

                                        6

                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                        flag11=0 flag4=0 REady_LED4=0

                                        flag11=1

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                        6

                                        My delay (10)

                                        flag4=1 disp4=1 k4=0

                                        k1==0||k2==0||k3==0 flag5==1

                                        7

                                        Sw4_op (P03) ==0

                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                        7

                                        flag7==1

                                        flag9==1

                                        flag7=1

                                        flag7=0 flag2=0 REady_LED2=0

                                        flag9=0 flag3=0 REady_LED3=0

                                        flag9=1

                                        Sw5_op A(P04) ==0

                                        My delay (10)

                                        8

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                        9

                                        flag2==1

                                        flag3==1

                                        8

                                        flag1==1

                                        flag4==1 flag5=1 disp5=1

                                        flag9=1 disp5=1

                                        flag7=1 disp5=1

                                        flag11=1 disp5=1

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                        Sw6_op (P05) ==0

                                        My delay (10)

                                        flag2==1 ampamp flag7==1

                                        flag3==1 ampamp flag9==1 9

                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                        flag8=1 disp6=1

                                        10

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                        10

                                        flag4==1 ampamp flag11==1

                                        flag10=1 disp6=1

                                        flag12=1 disp6=1

                                        flag8==1

                                        flag10==1

                                        11

                                        flag6==1

                                        i++

                                        l++

                                        j++

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                        flag12==1

                                        M++

                                        11

                                        Stop

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        122 Program

                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                        define buzzerP2_0 buzzer indication

                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                        sbit sw5_op=P0^4 input switch5 for coin

                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                        output Led for indication

                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                        function prototype declaration

                                        void my_delay(unsigned int value) DELAY FUCTION

                                        void init_timer() timer 0 initialization function

                                        variable declaration

                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        start of main programme

                                        void main()

                                        init_timer() call it timer initialization function

                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                        start of while loop

                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                        condition for switch1

                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                        if(iltk) loop will repeat for desired time of charging

                                        if(igt=1000)

                                        buzzer=1 turn on buzzer if (ii==20)

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        REady_LED1=1 turn on ready indication of led1

                                        else if(ii==40)

                                        REady_LED1=0ii=0

                                        elseREady_LED1=0

                                        START_LED1=1

                                        else

                                        START_LED1=0

                                        k1=1 buzzer=0

                                        REady_LED1=0 flag1=0

                                        flag5=0flag6=0

                                        condition for switch2

                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                        REady_LED2=1 turn on ready 2 led indication

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        disp2=0

                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                        if(jltk)

                                        if(jgt1000) buzzer=1 if(jj==20)

                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                        elseREady_LED2=0

                                        START_LED2=1

                                        else START_LED2=0

                                        REady_LED2=0 k2=1 buzzer=0

                                        flag2=0flag7=0flag8=0

                                        j=0jj=0

                                        condition for switch 3

                                        if(flag3==1) check swich3 pressed

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        if(disp3==1 )

                                        REady_LED3=1 disp3=0

                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                        if(lltk)

                                        if(lgt1000) buzzer=1 if(ll==20)

                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                        elseREady_LED3=0

                                        START_LED3=1

                                        else START_LED3=0

                                        LED2=0 k3=1 buzzer=0

                                        REady_LED3=0 flag3=0

                                        flag9=0flag10=0

                                        l=0ll=0

                                        condition for switch 4

                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        REady_LED4=1 disp4=0

                                        if(flag11==1) check coin is pressed

                                        if(flag12==1) START is pressed

                                        if(mltk)

                                        if(mgt1000)

                                        buzzer=1 if(mm==20)

                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                        elseREady_LED4=0

                                        START_LED4=1

                                        else START_LED4=0

                                        buzzer=0 k4=1

                                        REady_LED4=0 flag4=0

                                        flag11=0flag12=0

                                        m=0mm=0

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        while(1)

                                        end of main programme

                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                        whenever specific time the interrupt will generate control will go in following function

                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if(sw1_op==0 ) ready switch flag for system1

                                        my_delay(10) CALL DELAY FUNCTION

                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                        if(flag7==1) SET THE FLAG

                                        flag7=1

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                        flag9=1

                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                        flag11=1

                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if(sw2_op==0 ) fready switch flag for system2

                                        my_delay (10)

                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                        if(flag5==1)

                                        flag5=1

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                        flag9=1

                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                        flag11=1

                                        elseflag11=0flag4=0REady_LED4=0

                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                        if(flag7==1)

                                        flag7=1

                                        else

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                        flag5=1

                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                        flag11=1

                                        elseflag11=0flag4=0REady_LED4=0

                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                        if(flag7==1)

                                        flag7=1

                                        elseflag7=0

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        flag2=0REady_LED2=0 if(flag5==1)

                                        flag5=1

                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                        flag9=1

                                        elseflag9=0flag3=0REady_LED3=0

                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                        if(flag6==1)

                                        i++ if (igt1000) ii++

                                        if (flag8==1)

                                        j++ if(jgt1000) jj++

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        if (flag10==1)

                                        l++ if (lgt1000) ll++

                                        if (flag12==1)

                                        m++ if (mgt1000) mm++

                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 13

                                        TROUBLE SHOOT

                                        Troubleshoot

                                        131 TROUBLE SHOOT

                                        A newly assembled circuit does not work may be due to -

                                        Faulty components

                                        Improper soldering

                                        Wrong connections

                                        Also any stop in working after some period may be due to -

                                        Component failure

                                        Supply failure

                                        Damaging of PCB

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Fault finding is very essential if you want the circuit to operate properly

                                        If a newly assembled circuit is not working properly check all the components and

                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                        proper soldering

                                        If faults are not observed during physical observations one should proceed for Hot

                                        test ie Voltage measurement at different points for example at Input terminal etc

                                        Resistance measurement is also done which is known as Dry test

                                        During this project work some green LEDs was not glow then we checked it

                                        continuity and replace it

                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                        heated after starting the project It happens because of some soldering points are shorted

                                        during soldering PCB We solved that problem

                                        CHAPTER 14

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        ADVANTAGES OF

                                        THE PROJECT

                                        Advantages

                                        141 ADVANTAGES OF THE PROJECT

                                        Simple and hand efficient Microcontroller based system

                                        Fast charging capacity

                                        Simple to operate

                                        Ease of mobility

                                        Facilitates connectivity for 90 of cellular phones

                                        Less expensive

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Reduced man power

                                        Low power consumption

                                        It can offer emergency charging for 4sets of handsets synchronously

                                        CHAPTER 15

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        DISADVANTAGES

                                        OF THE PROJECT

                                        Disadvantages

                                        151 DISADVANTAGES OF THE PROJECT

                                        It requires mains supply to work project

                                        Due to limited charging channels till now there may be a possibility that

                                        mobile phones of few brands cannot be connected for charging For this

                                        purpose we have to use separate connectors for that specific brand differently

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                        min

                                        It does not have battery backup therefore it cannot be portable

                                        CHAPTER 16

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        APPLICATIONS OF

                                        THE PROJECT

                                        Application

                                        161 APPLICATIONS OF THE PROJECT

                                        The coin based mobile phone charger is very useful to public for using coin to

                                        charge for the mobile phone in any places

                                        It is used for emergency charging purposes

                                        It can be installed in malls railway stations bus stops and other public

                                        places

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        The charger offers a unique revenue opportunity for a vast range of

                                        businesses - from airports to pubs from universities to health clubs virtually

                                        any location where there is a high footfall creating a large number of

                                        potential users

                                        It can be installed in offices and collages for pay charging facility

                                        CHAPTER 17

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        FUTURE

                                        DEVELOPMENT OF

                                        THE PROJECT

                                        FUTURE DEVELOPMENT OF THE PROJECT

                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                        This project is very useful to people who are using mobile phone without charging

                                        condition in public places

                                        It will use with a stereo advertisement carrier that can display video advertisement

                                        It will provide battery backup for make it portable

                                        It will also provide SMS system in future

                                        We can also increase the charging time by editing software of the project

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 18

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        COST ANALYSIS

                                        OF THE PROJECT

                                        COST ANALYSIS OF THE PROJECT

                                        181 COST ANALYSIS OF THE PROJECT

                                        1811 Component list for power supply card

                                        Footprint Quantity Designators Rate

                                        Resistor

                                        22K 1 R2 1

                                        1K 1 R1 1

                                        Capacitor

                                        1000uf25V 1 C5 10

                                        2200uf25V 1 C1 10

                                        022uf 2 C6 C2 1

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                        Table 1811 Component list for power supply card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        01uf 2 C4 C3 1

                                        IC

                                        BRIDGE W10 2 BR2 BR1 10

                                        L7812CV (TO-220) 1 U2 8

                                        L7805CV (TO-220) 1 U1 8

                                        Connector

                                        CON PHO 2PIN 2 J3 J2 16

                                        CON PHO 3PIN 1 J1 12

                                        LED3mm red 2 L1 L2 15

                                        Heat sink (TO-220) 2 16

                                        Total 955

                                        1812 Component list for battery charger card

                                        Footprint Quantity Rate

                                        Capacitor

                                        2200uf25V 1 1000

                                        022uf 4 100

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        01uf 4 100

                                        IC

                                        BRIDGE W10 1 500

                                        L7805CV (TO-220) 4 3200

                                        Connector

                                        CON PHO 2PIN 1 800

                                        Relimate 2 pin 1 400

                                        relimate 3 pin 4 2000

                                        Heat sink (TO-220) 4 1200

                                        TOTAL 9300

                                        1813 Component list for Relay card

                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                        Table 1812Component list for battery charger card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                        Total 18900

                                        1814Component list for controller card

                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                        Table 1813Component list for relay card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                        total 27000

                                        1815 Miscellaneous material

                                        Material Quantity Rate

                                        electronic item

                                        Transformer

                                        TXR1 0-9-15 1 20000

                                        0-9 1A

                                        0-15 100mA

                                        TXR2 0-9 1 16500

                                        0-9 1A

                                        Proximity switch 1 20000

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                        Table 1814Component list for microcontroller card

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Red push bottom 4 4000

                                        Green push button 1 1000

                                        Red led 5mm 4 800

                                        Green led 5mm 4 800

                                        Led holder 8 1600

                                        Copper clad 2 4000

                                        3 core cable 1 meter 1500

                                        3 pin plug 1 3000

                                        2 pin relimate wire 19 9000

                                        3 pin relimate wire 5 3750

                                        4 pin relimate wire 2 2000

                                        mechanical items

                                        Enclosure 1 25000

                                        Acrylic sheet 2 X 1 30000

                                        12mm cable gland 1 1000

                                        Screw 3mm 33 2000

                                        Screw 35mm 6 2400

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        10 mm spacers 100 1500

                                        10mm insert to stud 50 10000

                                        cable tie 2500

                                        Total 162350

                                        CHAPTER 19

                                        APPENDIX

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                        Table 1815Component list for miscellaneous material

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        APPENDIX

                                        191 APPENDIX

                                        1911 78xx IC datasheet

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                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1912 W10 datasheet

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1913 4n33 IC datasheet

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                        1914 MAX 232

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1915 ULN2003a IC datasheet

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        1916 89V51RD2 IC datasheet

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 20

                                        CONCLUSION

                                        CONCLUSION

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                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        201 CONCLUSION

                                        The coin-operated mobile phone charger is already successfully installed in

                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                        installed in any business premises

                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                        from airports to pubs from universities to health clubs virtually any location where there is

                                        a high footfall creating a large number of potential users

                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                        extend low mobile phone talk time provide battery charging

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 21

                                        IMAGES OF THE

                                        PROJECT

                                        Images of the project

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        211 IMAGES OF THE PROJECT

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                        fig211 lsquoCoin operated mobile battery charger

                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Fig 216 Relay driver circuit

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                        Fig 213 Constant voltage battery charger circuit

                                        Fig214 Power supply circuit

                                        Fig215 Metal detector proximity switch

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Fig217 Microcontroller circuit

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        Fig228 coin operated mobile battery charger project presentation

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        CHAPTER 22

                                        BIBILOGRAPHY

                                        BIBLIOGRAPHY

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                        221 BIBLIOGRAPHY

                                        BOOKS

                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                        INTERNET LINKS

                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                        • CHAPTER 1

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          54 MICROCONTORLLER CIRCUIT

                                          541 CIRCUIT DIAGRAM

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 21 Fig 56 Microcontroller circuit diagram

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          542 CIRCUIT DIAGRAM EXPLANATION

                                          CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                          the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                          port P04 through J4 and START switch is connected to port P05 through SW5

                                          Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                          P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                          Output for relay card is taken on port P14 to P17

                                          Components C1 R1 and push button S1 forms reset circuit which provides a power

                                          on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                          110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                          22pf capacitor used as loading capacitor for crystal

                                          Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                          RN2 resistance network

                                          IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                          the proximity switch and microcontroller and convert its output readable to microcontroller

                                          IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                          communication between PC and a microcontroller through connector J3

                                          Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                          communication process

                                          Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                          power supply connection

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                          P00 = switch1 for channel 1

                                          P01 = switch2 for channel 2

                                          P02 = switch3 for channel 3

                                          P03 = switch4 for channel 4

                                          P04 = switch5 for coin input sensor (proximity switch)

                                          P05 = switch6 for start charging

                                          P10 = channel 1 red LED1 (ready system)

                                          P11 = channel 2 red LED2 (ready system2)

                                          P12 = channel 3 red LED3 (ready system3)

                                          P13 = channel 4 red LED4 (ready system4)

                                          P14 = channel 1 relay (start system1)

                                          P15 = channel 2 relay (start system2)

                                          P16 = channel 3 relay (start system3)

                                          P17 = channel 4 relay (start system4)

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 6

                                          LIST OF THE

                                          COMPONENTS

                                          List of the components

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          61 LIST OF THE COMPONETS

                                          RESISTORS

                                          CAPACITORS

                                          LIGHT EMITING DIODES (LEDS)- Green Red

                                          RELAYrsquoS-

                                          TRANSFORMERS

                                          RECTIFIER BRIDGES (W 10)

                                          OSCILLATOR

                                          SWITCHES- Push switches

                                          DARLINGTON PAIR IC (ULN2003a)

                                          SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                          SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                          OPTOCOUPLER IC (4N33)

                                          MICROCONTROLLER IC (89V51 RD2)

                                          RELIMATE CONNECTOR- 2 pin amp 4 pin

                                          RS-232 PORT CONNECTOR

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 7

                                          INTRODUCTION

                                          OF COMPONENTS

                                          Working of components

                                          Features or Uses of components

                                          Testing of components

                                          71 RESISTOR

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          711 WORKING

                                          Resistors limit current Resistors are considered to be the most used and the most

                                          important component of all the electronic circuits Resistors resist the flow of electrical

                                          current The higher the value of resistance (measured in ohms)

                                          the lower the current will be

                                          712 TESTING

                                          Read the indicated color code value then select the OHM-scale within but not way

                                          below the indicated value A resistor is good if its resistance is close to the indicated

                                          Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                          all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                          ohmmeter scale settings resistor is shorted

                                          713 SPECIFICATIONS

                                          To completely specify a resistors characteristics requires knowledge of the following

                                          parameters-

                                          bull Value

                                          bull Tolerance

                                          bull Temperature Coefficient

                                          bull Power Rating

                                          The specification of a resistor may be marked on its surface using either of two

                                          systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                          the second more recent system uses a combination of alpha-numeric characters

                                          7 2 CAPACITOR

                                          721 WORKING

                                          When DC voltage is applied to the capacitor an electric charge is stored on each

                                          electrode While the capacitor is charging up current flows The current will stop flowing

                                          when the capacitor has fully charged Capacitors find use

                                          in circuits for a variety of purposes They are used in

                                          time delay generation RC circuits In power supplies for filtering and power supply

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          decoupling as blocking capacitors for power factor correction and motor starting in LC

                                          tank circuits and so on

                                          722 TESTING

                                          To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                          negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                          A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                          and moves back again to infinite resistance position A defective indication for an

                                          electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                          which is an indication that the capacitor is shorted

                                          73 LIGHT EMITING DIODE (LED)

                                          731 WORKING

                                          LEDs are special diodes that emit light when

                                          connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                          indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                          the heart of an LED the semi-conductor chip

                                          In our project Green LED are used here for mainly two purpose

                                          a Charging ON indication (when ON)

                                          b Channel fault indication (always OFF)

                                          732 TESTING

                                          The good and working LED will then light up or glow a busted LED will not LEDs

                                          must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                          1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                          directly connected to a battery or power supply It will be destroyed the LED

                                          733 FEATURES

                                          Single color

                                          High bright output

                                          Low power consumption

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          High reliability and long life

                                          734 Descriptions

                                          Dice material GaInN

                                          Emitting Color Super Bright White

                                          Device Outlineφ5mm Round Type

                                          Lens Type Water Clear

                                          74 RELAY

                                          741 WORKING

                                          A relay is an electrically operated switch Current

                                          flowing through the coil of the relay creates a magnetic field

                                          which attracts a lever and changes the switch contacts The coil

                                          current can be on or off so relays have two switch positions and

                                          most have double throw (changeover) switch contacts

                                          Relays are like remote control switches and are used in

                                          many applications because of their relative simplicity long life

                                          and proven high reliability

                                          742 USES

                                          The main operation of a relay comes in places where only a low-power signal can be

                                          used to control a circuit

                                          It is also used in places where only one signal can be used to control a lot of circuits

                                          The application of relays started during the invention of telephones They played an

                                          important role in switching calls in telephone exchanges They were also used in

                                          long distance telegraphy They were used to switch the signal coming from one

                                          source to another destination

                                          743 TESTING

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          A relay will usually have a coil pole terminal and a set of

                                          contacts The set of contacts that are open when the relay is not

                                          energized are called normally open (NO) contacts and the set of

                                          contacts that are closed when the relay is not energized are called

                                          normally closed (NC) contacts The following steps can be used to perform the testing of

                                          the relay using a multimeter

                                          Keep the multimeter in the continuity check mode

                                          Check for continuity between the NC contacts and pole

                                          Check for discontinuity between NO contacts and the pole

                                          Now energies the relay using the rated voltage For example use a 9V battery for

                                          energizing a 9V relay The relay will engage with clicking sound

                                          Now check for continuity between NO contacts and pole

                                          Also check for discontinuity between NC contacts and pole

                                          As a final test measure the resistance of the relay coil using a multimeter and check

                                          whether it is matching to the value stated by the manufacturer

                                          If all the above tests are positive we can conclude that the relay is healthy

                                          75 TRANSFORMER

                                          751 WORKING

                                          A transformer is a device that transfers electrical energy

                                          from one circuit to another through inductively coupled

                                          electrical conductors A changing current in the first circuit (the

                                          primary) creates a changing magnetic field

                                          This changing magnetic field induces a changing voltage in the second circuit (the

                                          secondary) This effect is called mutual induction

                                          If a load is connected to the secondary circuit electric charge will flow in the

                                          secondary winding of the transformer and transfer energy from the primary circuit to the

                                          load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                          of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                          number of primary turns

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          By appropriate selection of the numbers of turns a transformer thus allows an

                                          alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                          making it less

                                          752 TESTING

                                          1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                          scale and then adjusting the knob to verify its reading is an easy step to the

                                          reading of the ohm

                                          2 To check the resistance of the coil unplug or unsolder the leads of the

                                          transformer from its circuit and measure the resistance of each coil

                                          3 The next step is to test each coil for shorts to other coils

                                          76 RECTIFIER BRIDGE (W 10)

                                          761 WORKING

                                          A diode bridge rectifier is a device for converting AC or

                                          alternating current electricity into DC or direct current AC

                                          electricity goes from positive to negative constantly whereas DC

                                          always flows in the same direction

                                          AC electricity is more efficient to transmit and easier to

                                          convert into different voltages However most appliances need DC current to run A diode

                                          bridge rectifier is the most common type of power supply used to provide this current In

                                          our project W10 is a bridge rectifier which provides on single semiconductor chip

                                          77 OSCILLATOR

                                          771 Working

                                          An oscillator puts out an endless series of pulses The output

                                          constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          all digital circuits have some type of oscillator This stream of output pulses is often

                                          called a clock One of the most important features of any oscillator is its frequency stability

                                          or in other words its ability to provide a constant frequency output under varying load

                                          conditions Some of the factors that affect the frequency stability of an oscillator include

                                          temperature variations in the load and changes in the DC power supply Frequency stability

                                          of the output signal can be improved by the proper selection of the components used for the

                                          resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                          be obtained from normal LC and RC tank circuits

                                          In our project instead of 12MHz crystal 110592MHz is used because it can be

                                          divided to give you exact clock rates for most of the common baud rates for the UART

                                          especially for the higher speeds (9600 19200) These crystals are readily available and

                                          commonly used

                                          78 SWITCH

                                          781 WORKING

                                          The most familiar form of switch is a manually operated

                                          electromechanical device with one or more sets of electrical contacts

                                          Each set of contacts can be in one of two states either closed meaning

                                          the contacts are touching and electricity can flow between them or

                                          open meaning the contacts are separated and the switch is non

                                          conducting The mechanism actuating the transition between these two

                                          states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                          momentary (push-for on or push-for off) type

                                          782 USES

                                          In electronics a switch is an electrical component that can break an electrical

                                          circuit interrupting the current or diverting it from one conductor to another

                                          783 TESTING

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                          no connection Switch can tested by using multimeter in continuity range

                                          79 DARLINGTON PAIR IC (ULN2003a)

                                          791 WORKING

                                          The Darlington transistor (often called a Darlington pair) is a

                                          compound structure consisting of two bipolar transistors (either

                                          integrated or separated devices) connected in such a way that the

                                          current amplified by the first transistor is amplified further by the

                                          second one This configuration gives a much higher current gain than

                                          each transistor taken separately and in the case of integrated devices

                                          can take less space than two individual transistors because they can

                                          use a shared collector

                                          Integrated Darlington pairs come packaged singly in

                                          transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                          The Darlington transistor array used is ULN2003 Applications include relay

                                          drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                          drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                          to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                          for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                          792 FEATURES

                                          The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                          transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                          with common-cathode clamp diodes for switching inductive loads The collector-current

                                          rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                          higher current capability

                                          710 SERIES VOLTAGE REGULATER IC (78XX)

                                          7101 WORKING

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Voltage Regulator (regulator) usually having three legs converts varying input

                                          voltage and produces a constant regulated output voltage They are available in a variety of

                                          outputs

                                          The most common part numbers start with the numbers 78 or 79 and finish with two

                                          digits indicating the output voltage The number 78 represents positive voltage and 79

                                          negative one The 78XX series of voltage regulators are designed for positive input

                                          The LM78XX series typically has the ability to drive current up to 1A For

                                          application requirements up to 150mA 78LXX can be used As mentioned above the

                                          component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                          an output leg with the regulators voltage

                                          As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                          voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                          difference between the input and output appears as heat If the input voltage is unnecessarily

                                          high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                          sinking the regulator will shut down

                                          711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                          7111 WORKING

                                          The MAX-232 It includes a Charge Pump which generates

                                          +10V and -10V from a single 5v supply

                                          This IC also includes two receivers and two transmitters in

                                          the same package This is handy in many cases when we only want to

                                          use the Transmit and Receive data Lines We dont need to use two chips one for the

                                          receive line and one for the transmit There are also many variations of these devices The

                                          large value of capacitors are not only bulky but also expensive Therefore other devices are

                                          available which use smaller capacitors and even some with inbuilt capacitors However the

                                          MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                          Dual Charge-Pump Voltage Converter

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                          V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                          output

                                          712 OPTOCOUPLER IC (4N33)

                                          7121 WORKING

                                          In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                          photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                          between elements of a circuit typically a transmitter and a receiver while keeping them

                                          electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                          back to an electrical signal electrical contact along the path is broken

                                          Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                          essentially a combination of two distinct devices an optical transmitter typically a gallium

                                          arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                          light-triggered diac The two are separated by a transparent barrier which blocks any

                                          electrical current flow between the two but does allow the passage of light

                                          The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                          silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                          of isolation between driving and load circuits These Optocouplers can be used to replace

                                          reed and mercury relays with advantages of long life high speed switching and elimination

                                          of magnetic field

                                          713 MICROCONTROLLER IC (89V51 RD 2 )

                                          713 WORKING

                                          The P89V51RD2 is an 80C51 microcontroller with 64

                                          kB Flash and 1024 bytes of data RAM

                                          A key feature of the P89V51RD2 is its X2 mode option

                                          The design engineer can choose to run the application with the conventional 80C51 clock

                                          rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          achieve twice the throughput at the same clock frequency Another way to benefit from this

                                          feature is to keep the same performance by reducing the clock frequency by half thus

                                          dramatically reducing the EMI

                                          The Flash program memory supports both parallel programming and in serial In-

                                          System Programming (ISP) Parallel programming mode offers gang-programming at high

                                          speed reducing programming costs and time to market ISP allows a device to be

                                          reprogrammed in the end product under software control The capability to fieldupdate the

                                          application firmware makes a wide range of applications possible The P89V51RD2 is also

                                          In-Application Programmable (IAP) allowing the Flash program memory to be

                                          reconfigured even while the application is running

                                          714 RELIMATE CONNECTOR

                                          7141 WORKING

                                          These are wire to board type connectors used to facilitate

                                          proper and firm electrical connection between the relay card and

                                          microcontroller card

                                          The connector has following specifications

                                          No of Ways 2-20

                                          Voltage Rating 250V AC DC

                                          Current Rating 3A AC DC

                                          Contact Resistance 20mW max

                                          Insulation Resistance 1000MW min

                                          Dielectric Withstanding 1000V ACminute

                                          Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                          The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                          connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                          conflicts

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          715 RS-232 PORT CONNECTOR

                                          7151 WORKING

                                          Almost all digital devices which we use require either TTL

                                          or CMOS logic levels Therefore the first step to connecting a

                                          device to the RS-232 port is to transform the RS-232 levels back

                                          into 0 and 5 Volts This is done by RS-232 Level Converters

                                          Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                          Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                          The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                          problem in many instances where only a single supply of +5V is present

                                          CHAPTER 8

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          IMPLIMENTATION

                                          OF THE PCB

                                          Components layout designing

                                          Developing or Etching the PCB

                                          Other operations like Drilling Cutting Tinning

                                          81 IMPLIMENTATION OF THE PCB

                                          A proper PCB ensure that various circuit components are interconnected as per the

                                          circuit diagram once they have been placed on the PCB in their proper positions and

                                          subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                          base material to which is permanently attached a flat metallic network of conducting path

                                          whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                          for this project is single one

                                          The basic material used may be resin coated paper fiber glass ceramic and the flat

                                          board configuration however is most widely used and it may be of the nature of the single

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                          which ensures adequate and permanent low resistance coupling

                                          811 BOARD DESIGN

                                          PCB designed is the most important and requires great care during work In this case

                                          great care must be taken while tracing the circuit or layout on the board Because once PCB

                                          is designed it is virtually impossible to alter it While designing a circuit designer should

                                          take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                          unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                          also help to solve this problem when circuit is complicated

                                          812 THE MASTER DIAGRAM

                                          The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                          which is commonly made twice as the finished circuit since this makes the working on that

                                          much easier especially when circuit is complicated photography eventually reduces the

                                          size of diagram to that of the circuit before proceeding we must know some rules regarding

                                          the designing -

                                          a The space between the conductors must be strictly controlled to avoid the possibility

                                          of electrical discharges or unwanted capacitance The amount by which the mater

                                          diagram is to reduce in size is thus a critical deign feature

                                          b The conductor must be wider in those part of the circuits that are going to handle

                                          large current must be handle without undue temperature of conductors

                                          c The minimum width of copper should not generally be less than about 15mmThis

                                          is related to mechanical strength rather than electrical properties and it also ensure

                                          that strips remains securely bounded to the base material

                                          d The points where the component holes for component lead wire occurs must be sited

                                          to suit the dimensions of the component and dimensions between lead-out wire so

                                          that the components can be situated correctly on finished board The conductor is

                                          also main large at the point of holes

                                          813 PCB MAKING

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          When the mater diagram probable twice the size of real PCB has been evolved the

                                          test major step consists of etching or dissolving the unwanted metal from copper claded

                                          board to create a circuit as depicted by master diagram It must be stressed that very

                                          accurate checking master is essential at this stage Then the master point is mounted on a

                                          special frame on easy facing of a larger camera and with the aid of the very powerful

                                          illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                          developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                          brought into operation This comprises the camera body mounted so that sideways after

                                          each exposure In this way number of copies of the original master diagram is set out

                                          exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                          In case of simple and need of number of less PCB economic and advisable to use the

                                          following lab method of PCB making

                                          Planning The Circuit

                                          It is not a particular difficult There are several important factors that need not be

                                          taken into account if the finished device is to work properly we must consider gain factor

                                          and ensure that the input and output parts are sufficiently well isolated to avoid the

                                          possibility We must also ensure that conductors and components carrying high frequency

                                          current are well separated from the part of the circuit We are also to make sure that all

                                          components need to return to earth are properly connected and that possibility of common

                                          impedance arising earth returned

                                          Circuit is totally eliminated by making all earth as substantial possible consistent

                                          with nature of design Other factors that have to successfully studied include availability of

                                          adequate return points on board and itrsquos mounting from accessibility of switch connection

                                          made for mechanical fixing ventilation effect of vibration

                                          Cleaning The Board

                                          The copper side of the board must be thoroughly cleaned before circuit plan is

                                          transferred to it This is important because even slightest trace of graze (from figure of

                                          instance) will impure the etching process and when the circuit plan has been neatly

                                          transferred to copper in this manner the board is held under running tap and the allowed to

                                          dry before resist is applied

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Transforming the Plan

                                          Now once cleaning is done plan has to transfer on copper surface of PCB material

                                          A convenient way to do this is simply put the carbon paper between a copper surface of the

                                          board and working plan and carefully trace the lines of original plan with a ball pen

                                          Resist

                                          Resist is nothing more than a substrate that is unaffected by presence etching

                                          chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                          clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                          covered when resists the leaguer type of paints possess good resist properties but

                                          disadvantage of relatively long time taken for drying It is essential to resist through

                                          hardening before etching is started Nail polished are better as they quickly and are less

                                          difficult to remove

                                          To overcome this drying effect and to achieve the sharp edge of the trace on the

                                          PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                          short circulating due to paints are completely the avoid etching tapes and pads are available

                                          in different sizes

                                          Correcting Error

                                          When a result has been thoroughly hardened any errors that have been made can

                                          usually be corrected by gently scratching away with knife To ensure clear out lines round

                                          edges of copper conductors on board the resist must be applied with steady band

                                          Etching

                                          Next comes etching of unwanted copper amp whether a small single is all that is

                                          required as quantity of board to be produce certain precautions must be taken before

                                          operation is commenced the most used etch amp I ferrite chloride to this is added small

                                          quantity of HCL to accelerate But not critical as lab construction concerned A good

                                          etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                          grams of water

                                          Agitation

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                          the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                          laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                          gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                          temperature and thickness of copper foil

                                          Finishing Off

                                          When all unwanted copper is dissolved from areas between conductor board should

                                          be taken from an etchant amp washed in water The resist must be removed using proper

                                          solvent After this the copper surface must be polished with any kind of cleaner It should be

                                          seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                          PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                          This process is called Tinning This process of coating involve track with soldier

                                          Advantage of tinning the effect of environment of conductors then PCB is drilled

                                          ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                          Assembling On PCB

                                          After the holes are drilled the component have to be assembled on PCB before

                                          assembling the components it is necessary to clean soldering iron in order to get easy amp

                                          accurate soldering Removing impurity particles that are gathered on iron bit due to

                                          repetitive use cleans soldering iron

                                          CHAPTER 9

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          SOLDERING

                                          TECHNIQUE

                                          Technique for good soldering

                                          91 SOLDERING TECHNIQUE

                                          For soldering of any joints first the terminal to be soldered are cleaned to remove

                                          oxide film or dirt on it If required flux is applied on the points to be soldered

                                          Now the joint to be soldered is heated with the help of soldering iron Heat

                                          applied should be such that when solder wire is touched to joint it must melt

                                          quickly

                                          The joint and the soldering iron is held such that molten solder should flow

                                          smoothly over the joint

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          When joint is completely covered with molten solder the soldering iron is re-

                                          moved

                                          The joint is allowed to cool without any movement

                                          The bright shining solder indicates good soldering

                                          In case of dry solder joint a air gap remains in between the solder material and

                                          the joint It means that soldering is improper This is removed and again solder-

                                          ing is done

                                          Thus this way all the components are soldered on P C B

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 10

                                          PCB LAYOUTS

                                          Schematic diagram

                                          Bottom and top layout

                                          101 POWER SUPPLY CARD

                                          1011 SCHIMETIC DIAGRAM

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1012 LEGEND MARKING

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                          Fig1011 Schematic diagram of power supply card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1013TOP LAYER

                                          1014 BOTTOM LAYER

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                          Fig1013 Top layer of power supply

                                          card

                                          Fig1014 Schematic diagram of power supply card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          102 BATTERY CHARGER CARD

                                          1021 SCHEMATIC DIAGRAM

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                          Fig1021 Schematic diagram of battery charger card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          103 RELAY CARD

                                          1031 SCHIMETIC DIAGRAM

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                          Fig1031 Schematic diagram of Relay card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1032 RELAY CARD LEGEND MARKING

                                          1033 TOP LAYER

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                          Fig1032 Legend marking of Relay card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1034 BOTTOM LAYER

                                          104 MICROCONTROLER CARD

                                          1041 SCHIMETIC DIAGRAM

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                          Fig1034 Bottom layer of Relay card

                                          Fig1041 Schematic diagram of microcontroller card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1042 ALL LAYERS

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                          Fig1042 All layer of microcontroller card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 11

                                          INTRODUCTION

                                          OF SOFTWARE

                                          Keil (microVision 2)

                                          Eagle (Easily Applicable Graphical Layout Editor)

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          111 Keil (microVision 2)

                                          1111 Introduction to C51 Cross Compiler

                                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                          generates object code that matches the efficiency and speed of assembly programming

                                          Using a high-level language like C has many advantages over assembly language

                                          programming

                                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                          the memory structure of the 8051 CPU is desirable (but not necessary)

                                          Details like register allocation and addressing of the various memory types and data

                                          types is managed by the compiler

                                          Programs get a formal structure (which is imposed by the C programming language) and

                                          can be divided into separate functions This contributes to source code reusability as

                                          well as better overall application structure

                                          The ability to combine variable selection with specific operations improves program

                                          readability

                                          Keywords and operational functions that more nearly resemble the human thought

                                          process may be used

                                          Programming and program test time is drastically reduced

                                          The C run-time library contains many standard routines such as formatted output

                                          numeric conversions and floating-point arithmetic

                                          Existing program parts can be more easily included into new programs because of

                                          modular program construction techniques

                                          The language C is a very portable language (based on the ANSI standard) that enjoys

                                          wide popular support and is easily obtained for most systems Existing program

                                          investments can be quickly adapted to other processors as needed

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1112 Software Development Cycle in Keil

                                          When we use the Keil Software tools the

                                          project development cycle is roughly the same as

                                          it is for any other software development project

                                          1 Create a project select the target chip from the

                                          device database and configure the tool settings

                                          2 Create source files in C or assembly

                                          3 Build your application with the project

                                          manager

                                          4 Correct errors in source files

                                          5 Test the linked application A block diagram of

                                          the complete 8051 tool set may best illustrate the

                                          development cycle

                                          112 Eagle (Easily Applicable Graphical Layout Editor)

                                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                          1121 Schematic Editor

                                          In this one can develop amp design circuits for the required PCB

                                          1122 Layout Editor

                                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                          Fig 111 Software development in KEIL

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1123 Library Editor

                                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                          1124 Auto Router

                                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                                          the PCB tracks designed

                                          1125 Cam Processor

                                          This is used to finally print the various layers of the designed PCB viz Top Layer

                                          Bottom Layer Component Layer Masking Layer etc

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                          Start

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 12

                                          INTRODUCTION

                                          OF

                                          PROGRAMMING

                                          Flowchart of programming

                                          Program code

                                          121 Flowchart

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                          2

                                          flag9==1

                                          flag9=1

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                          flag11==1

                                          flag11=1 flag11=0 flag4=0

                                          REady_LED4=0

                                          Sw2_op (P01) ==0

                                          My delay (10)

                                          3 3

                                          flag2=1 disp2=1 k2=0

                                          3

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                          4

                                          flag11==1

                                          flag11=0 flag4=0 REady_LED4=0

                                          flag11=1

                                          My delay (10)

                                          flag3=1 disp3=1 k3=0

                                          k1==0||k2==0||k4==0

                                          Sw3_op (P02) ==0

                                          5

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                          flag5==1

                                          5

                                          flag11==1

                                          flag7=1

                                          flag7==1

                                          flag7=0 flag2=0 REady_LED2=0

                                          6

                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                          flag11=0 flag4=0 REady_LED4=0

                                          flag11=1

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                          6

                                          My delay (10)

                                          flag4=1 disp4=1 k4=0

                                          k1==0||k2==0||k3==0 flag5==1

                                          7

                                          Sw4_op (P03) ==0

                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                          7

                                          flag7==1

                                          flag9==1

                                          flag7=1

                                          flag7=0 flag2=0 REady_LED2=0

                                          flag9=0 flag3=0 REady_LED3=0

                                          flag9=1

                                          Sw5_op A(P04) ==0

                                          My delay (10)

                                          8

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                          9

                                          flag2==1

                                          flag3==1

                                          8

                                          flag1==1

                                          flag4==1 flag5=1 disp5=1

                                          flag9=1 disp5=1

                                          flag7=1 disp5=1

                                          flag11=1 disp5=1

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                          Sw6_op (P05) ==0

                                          My delay (10)

                                          flag2==1 ampamp flag7==1

                                          flag3==1 ampamp flag9==1 9

                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                          flag8=1 disp6=1

                                          10

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                          10

                                          flag4==1 ampamp flag11==1

                                          flag10=1 disp6=1

                                          flag12=1 disp6=1

                                          flag8==1

                                          flag10==1

                                          11

                                          flag6==1

                                          i++

                                          l++

                                          j++

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                          flag12==1

                                          M++

                                          11

                                          Stop

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          122 Program

                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                          define buzzerP2_0 buzzer indication

                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                          sbit sw5_op=P0^4 input switch5 for coin

                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                          output Led for indication

                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                          function prototype declaration

                                          void my_delay(unsigned int value) DELAY FUCTION

                                          void init_timer() timer 0 initialization function

                                          variable declaration

                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          start of main programme

                                          void main()

                                          init_timer() call it timer initialization function

                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                          start of while loop

                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                          condition for switch1

                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                          if(iltk) loop will repeat for desired time of charging

                                          if(igt=1000)

                                          buzzer=1 turn on buzzer if (ii==20)

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          REady_LED1=1 turn on ready indication of led1

                                          else if(ii==40)

                                          REady_LED1=0ii=0

                                          elseREady_LED1=0

                                          START_LED1=1

                                          else

                                          START_LED1=0

                                          k1=1 buzzer=0

                                          REady_LED1=0 flag1=0

                                          flag5=0flag6=0

                                          condition for switch2

                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                          REady_LED2=1 turn on ready 2 led indication

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          disp2=0

                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                          if(jltk)

                                          if(jgt1000) buzzer=1 if(jj==20)

                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                          elseREady_LED2=0

                                          START_LED2=1

                                          else START_LED2=0

                                          REady_LED2=0 k2=1 buzzer=0

                                          flag2=0flag7=0flag8=0

                                          j=0jj=0

                                          condition for switch 3

                                          if(flag3==1) check swich3 pressed

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          if(disp3==1 )

                                          REady_LED3=1 disp3=0

                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                          if(lltk)

                                          if(lgt1000) buzzer=1 if(ll==20)

                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                          elseREady_LED3=0

                                          START_LED3=1

                                          else START_LED3=0

                                          LED2=0 k3=1 buzzer=0

                                          REady_LED3=0 flag3=0

                                          flag9=0flag10=0

                                          l=0ll=0

                                          condition for switch 4

                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          REady_LED4=1 disp4=0

                                          if(flag11==1) check coin is pressed

                                          if(flag12==1) START is pressed

                                          if(mltk)

                                          if(mgt1000)

                                          buzzer=1 if(mm==20)

                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                          elseREady_LED4=0

                                          START_LED4=1

                                          else START_LED4=0

                                          buzzer=0 k4=1

                                          REady_LED4=0 flag4=0

                                          flag11=0flag12=0

                                          m=0mm=0

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          while(1)

                                          end of main programme

                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                          whenever specific time the interrupt will generate control will go in following function

                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if(sw1_op==0 ) ready switch flag for system1

                                          my_delay(10) CALL DELAY FUNCTION

                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                          if(flag7==1) SET THE FLAG

                                          flag7=1

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                          flag9=1

                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                          flag11=1

                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if(sw2_op==0 ) fready switch flag for system2

                                          my_delay (10)

                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                          if(flag5==1)

                                          flag5=1

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                          flag9=1

                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                          flag11=1

                                          elseflag11=0flag4=0REady_LED4=0

                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                          if(flag7==1)

                                          flag7=1

                                          else

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                          flag5=1

                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                          flag11=1

                                          elseflag11=0flag4=0REady_LED4=0

                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                          if(flag7==1)

                                          flag7=1

                                          elseflag7=0

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          flag2=0REady_LED2=0 if(flag5==1)

                                          flag5=1

                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                          flag9=1

                                          elseflag9=0flag3=0REady_LED3=0

                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                          if(flag6==1)

                                          i++ if (igt1000) ii++

                                          if (flag8==1)

                                          j++ if(jgt1000) jj++

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          if (flag10==1)

                                          l++ if (lgt1000) ll++

                                          if (flag12==1)

                                          m++ if (mgt1000) mm++

                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 13

                                          TROUBLE SHOOT

                                          Troubleshoot

                                          131 TROUBLE SHOOT

                                          A newly assembled circuit does not work may be due to -

                                          Faulty components

                                          Improper soldering

                                          Wrong connections

                                          Also any stop in working after some period may be due to -

                                          Component failure

                                          Supply failure

                                          Damaging of PCB

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Fault finding is very essential if you want the circuit to operate properly

                                          If a newly assembled circuit is not working properly check all the components and

                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                          proper soldering

                                          If faults are not observed during physical observations one should proceed for Hot

                                          test ie Voltage measurement at different points for example at Input terminal etc

                                          Resistance measurement is also done which is known as Dry test

                                          During this project work some green LEDs was not glow then we checked it

                                          continuity and replace it

                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                          heated after starting the project It happens because of some soldering points are shorted

                                          during soldering PCB We solved that problem

                                          CHAPTER 14

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          ADVANTAGES OF

                                          THE PROJECT

                                          Advantages

                                          141 ADVANTAGES OF THE PROJECT

                                          Simple and hand efficient Microcontroller based system

                                          Fast charging capacity

                                          Simple to operate

                                          Ease of mobility

                                          Facilitates connectivity for 90 of cellular phones

                                          Less expensive

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Reduced man power

                                          Low power consumption

                                          It can offer emergency charging for 4sets of handsets synchronously

                                          CHAPTER 15

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          DISADVANTAGES

                                          OF THE PROJECT

                                          Disadvantages

                                          151 DISADVANTAGES OF THE PROJECT

                                          It requires mains supply to work project

                                          Due to limited charging channels till now there may be a possibility that

                                          mobile phones of few brands cannot be connected for charging For this

                                          purpose we have to use separate connectors for that specific brand differently

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                          min

                                          It does not have battery backup therefore it cannot be portable

                                          CHAPTER 16

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          APPLICATIONS OF

                                          THE PROJECT

                                          Application

                                          161 APPLICATIONS OF THE PROJECT

                                          The coin based mobile phone charger is very useful to public for using coin to

                                          charge for the mobile phone in any places

                                          It is used for emergency charging purposes

                                          It can be installed in malls railway stations bus stops and other public

                                          places

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          The charger offers a unique revenue opportunity for a vast range of

                                          businesses - from airports to pubs from universities to health clubs virtually

                                          any location where there is a high footfall creating a large number of

                                          potential users

                                          It can be installed in offices and collages for pay charging facility

                                          CHAPTER 17

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          FUTURE

                                          DEVELOPMENT OF

                                          THE PROJECT

                                          FUTURE DEVELOPMENT OF THE PROJECT

                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                          This project is very useful to people who are using mobile phone without charging

                                          condition in public places

                                          It will use with a stereo advertisement carrier that can display video advertisement

                                          It will provide battery backup for make it portable

                                          It will also provide SMS system in future

                                          We can also increase the charging time by editing software of the project

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 18

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          COST ANALYSIS

                                          OF THE PROJECT

                                          COST ANALYSIS OF THE PROJECT

                                          181 COST ANALYSIS OF THE PROJECT

                                          1811 Component list for power supply card

                                          Footprint Quantity Designators Rate

                                          Resistor

                                          22K 1 R2 1

                                          1K 1 R1 1

                                          Capacitor

                                          1000uf25V 1 C5 10

                                          2200uf25V 1 C1 10

                                          022uf 2 C6 C2 1

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                          Table 1811 Component list for power supply card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          01uf 2 C4 C3 1

                                          IC

                                          BRIDGE W10 2 BR2 BR1 10

                                          L7812CV (TO-220) 1 U2 8

                                          L7805CV (TO-220) 1 U1 8

                                          Connector

                                          CON PHO 2PIN 2 J3 J2 16

                                          CON PHO 3PIN 1 J1 12

                                          LED3mm red 2 L1 L2 15

                                          Heat sink (TO-220) 2 16

                                          Total 955

                                          1812 Component list for battery charger card

                                          Footprint Quantity Rate

                                          Capacitor

                                          2200uf25V 1 1000

                                          022uf 4 100

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          01uf 4 100

                                          IC

                                          BRIDGE W10 1 500

                                          L7805CV (TO-220) 4 3200

                                          Connector

                                          CON PHO 2PIN 1 800

                                          Relimate 2 pin 1 400

                                          relimate 3 pin 4 2000

                                          Heat sink (TO-220) 4 1200

                                          TOTAL 9300

                                          1813 Component list for Relay card

                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                          Table 1812Component list for battery charger card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                          Total 18900

                                          1814Component list for controller card

                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                          Table 1813Component list for relay card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                          total 27000

                                          1815 Miscellaneous material

                                          Material Quantity Rate

                                          electronic item

                                          Transformer

                                          TXR1 0-9-15 1 20000

                                          0-9 1A

                                          0-15 100mA

                                          TXR2 0-9 1 16500

                                          0-9 1A

                                          Proximity switch 1 20000

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                          Table 1814Component list for microcontroller card

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Red push bottom 4 4000

                                          Green push button 1 1000

                                          Red led 5mm 4 800

                                          Green led 5mm 4 800

                                          Led holder 8 1600

                                          Copper clad 2 4000

                                          3 core cable 1 meter 1500

                                          3 pin plug 1 3000

                                          2 pin relimate wire 19 9000

                                          3 pin relimate wire 5 3750

                                          4 pin relimate wire 2 2000

                                          mechanical items

                                          Enclosure 1 25000

                                          Acrylic sheet 2 X 1 30000

                                          12mm cable gland 1 1000

                                          Screw 3mm 33 2000

                                          Screw 35mm 6 2400

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          10 mm spacers 100 1500

                                          10mm insert to stud 50 10000

                                          cable tie 2500

                                          Total 162350

                                          CHAPTER 19

                                          APPENDIX

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                          Table 1815Component list for miscellaneous material

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          APPENDIX

                                          191 APPENDIX

                                          1911 78xx IC datasheet

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1912 W10 datasheet

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1913 4n33 IC datasheet

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                          1914 MAX 232

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1915 ULN2003a IC datasheet

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          1916 89V51RD2 IC datasheet

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 20

                                          CONCLUSION

                                          CONCLUSION

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          201 CONCLUSION

                                          The coin-operated mobile phone charger is already successfully installed in

                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                          installed in any business premises

                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                          from airports to pubs from universities to health clubs virtually any location where there is

                                          a high footfall creating a large number of potential users

                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                          extend low mobile phone talk time provide battery charging

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 21

                                          IMAGES OF THE

                                          PROJECT

                                          Images of the project

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          211 IMAGES OF THE PROJECT

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                          fig211 lsquoCoin operated mobile battery charger

                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Fig 216 Relay driver circuit

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                          Fig 213 Constant voltage battery charger circuit

                                          Fig214 Power supply circuit

                                          Fig215 Metal detector proximity switch

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Fig217 Microcontroller circuit

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          Fig228 coin operated mobile battery charger project presentation

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          CHAPTER 22

                                          BIBILOGRAPHY

                                          BIBLIOGRAPHY

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                          221 BIBLIOGRAPHY

                                          BOOKS

                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                          INTERNET LINKS

                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                          • CHAPTER 1

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            542 CIRCUIT DIAGRAM EXPLANATION

                                            CHANNEL SELECT SWITCH CH1 to CH4 are connected to port P00 to P03 with

                                            the help of relimate connector denoted as SW1 to SW4 COIN IN signal is connected to

                                            port P04 through J4 and START switch is connected to port P05 through SW5

                                            Anodes of CHANNEL INDICATOR LED L1 to L4 are connected to port P10 to

                                            P13 and cathodes are connected to ground through 470Ω series resistor R2 to R5

                                            Output for relay card is taken on port P14 to P17

                                            Components C1 R1 and push button S1 forms reset circuit which provides a power

                                            on reset for the micro controller and even provide manual reset Crystal XL1 is a

                                            110592MHz crystal connected to pin 18 and 19 of microcontroller capacitor C2 and C3 are

                                            22pf capacitor used as loading capacitor for crystal

                                            Port 0 and Port 1 is pulled up using a 47KΩ SIP (Single Inline Package) RN1 and

                                            RN2 resistance network

                                            IC U3 (4N33) is an OPTO-COUPLER which is used to provide isolation between

                                            the proximity switch and microcontroller and convert its output readable to microcontroller

                                            IC U2 ie MAX232 and capacitor C6 to C9 forms a circuit used to establish

                                            communication between PC and a microcontroller through connector J3

                                            Led L9 and L10 with a series resistor R6 and R7 indicates the ongoing

                                            communication process

                                            Where C4 and C5 are used as filter capacitor terminal block J1is used to facilitate

                                            power supply connection

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 22

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                            P00 = switch1 for channel 1

                                            P01 = switch2 for channel 2

                                            P02 = switch3 for channel 3

                                            P03 = switch4 for channel 4

                                            P04 = switch5 for coin input sensor (proximity switch)

                                            P05 = switch6 for start charging

                                            P10 = channel 1 red LED1 (ready system)

                                            P11 = channel 2 red LED2 (ready system2)

                                            P12 = channel 3 red LED3 (ready system3)

                                            P13 = channel 4 red LED4 (ready system4)

                                            P14 = channel 1 relay (start system1)

                                            P15 = channel 2 relay (start system2)

                                            P16 = channel 3 relay (start system3)

                                            P17 = channel 4 relay (start system4)

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 6

                                            LIST OF THE

                                            COMPONENTS

                                            List of the components

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            61 LIST OF THE COMPONETS

                                            RESISTORS

                                            CAPACITORS

                                            LIGHT EMITING DIODES (LEDS)- Green Red

                                            RELAYrsquoS-

                                            TRANSFORMERS

                                            RECTIFIER BRIDGES (W 10)

                                            OSCILLATOR

                                            SWITCHES- Push switches

                                            DARLINGTON PAIR IC (ULN2003a)

                                            SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                            SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                            OPTOCOUPLER IC (4N33)

                                            MICROCONTROLLER IC (89V51 RD2)

                                            RELIMATE CONNECTOR- 2 pin amp 4 pin

                                            RS-232 PORT CONNECTOR

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 7

                                            INTRODUCTION

                                            OF COMPONENTS

                                            Working of components

                                            Features or Uses of components

                                            Testing of components

                                            71 RESISTOR

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            711 WORKING

                                            Resistors limit current Resistors are considered to be the most used and the most

                                            important component of all the electronic circuits Resistors resist the flow of electrical

                                            current The higher the value of resistance (measured in ohms)

                                            the lower the current will be

                                            712 TESTING

                                            Read the indicated color code value then select the OHM-scale within but not way

                                            below the indicated value A resistor is good if its resistance is close to the indicated

                                            Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                            all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                            ohmmeter scale settings resistor is shorted

                                            713 SPECIFICATIONS

                                            To completely specify a resistors characteristics requires knowledge of the following

                                            parameters-

                                            bull Value

                                            bull Tolerance

                                            bull Temperature Coefficient

                                            bull Power Rating

                                            The specification of a resistor may be marked on its surface using either of two

                                            systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                            the second more recent system uses a combination of alpha-numeric characters

                                            7 2 CAPACITOR

                                            721 WORKING

                                            When DC voltage is applied to the capacitor an electric charge is stored on each

                                            electrode While the capacitor is charging up current flows The current will stop flowing

                                            when the capacitor has fully charged Capacitors find use

                                            in circuits for a variety of purposes They are used in

                                            time delay generation RC circuits In power supplies for filtering and power supply

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            decoupling as blocking capacitors for power factor correction and motor starting in LC

                                            tank circuits and so on

                                            722 TESTING

                                            To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                            negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                            A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                            and moves back again to infinite resistance position A defective indication for an

                                            electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                            which is an indication that the capacitor is shorted

                                            73 LIGHT EMITING DIODE (LED)

                                            731 WORKING

                                            LEDs are special diodes that emit light when

                                            connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                            indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                            the heart of an LED the semi-conductor chip

                                            In our project Green LED are used here for mainly two purpose

                                            a Charging ON indication (when ON)

                                            b Channel fault indication (always OFF)

                                            732 TESTING

                                            The good and working LED will then light up or glow a busted LED will not LEDs

                                            must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                            1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                            directly connected to a battery or power supply It will be destroyed the LED

                                            733 FEATURES

                                            Single color

                                            High bright output

                                            Low power consumption

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            High reliability and long life

                                            734 Descriptions

                                            Dice material GaInN

                                            Emitting Color Super Bright White

                                            Device Outlineφ5mm Round Type

                                            Lens Type Water Clear

                                            74 RELAY

                                            741 WORKING

                                            A relay is an electrically operated switch Current

                                            flowing through the coil of the relay creates a magnetic field

                                            which attracts a lever and changes the switch contacts The coil

                                            current can be on or off so relays have two switch positions and

                                            most have double throw (changeover) switch contacts

                                            Relays are like remote control switches and are used in

                                            many applications because of their relative simplicity long life

                                            and proven high reliability

                                            742 USES

                                            The main operation of a relay comes in places where only a low-power signal can be

                                            used to control a circuit

                                            It is also used in places where only one signal can be used to control a lot of circuits

                                            The application of relays started during the invention of telephones They played an

                                            important role in switching calls in telephone exchanges They were also used in

                                            long distance telegraphy They were used to switch the signal coming from one

                                            source to another destination

                                            743 TESTING

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            A relay will usually have a coil pole terminal and a set of

                                            contacts The set of contacts that are open when the relay is not

                                            energized are called normally open (NO) contacts and the set of

                                            contacts that are closed when the relay is not energized are called

                                            normally closed (NC) contacts The following steps can be used to perform the testing of

                                            the relay using a multimeter

                                            Keep the multimeter in the continuity check mode

                                            Check for continuity between the NC contacts and pole

                                            Check for discontinuity between NO contacts and the pole

                                            Now energies the relay using the rated voltage For example use a 9V battery for

                                            energizing a 9V relay The relay will engage with clicking sound

                                            Now check for continuity between NO contacts and pole

                                            Also check for discontinuity between NC contacts and pole

                                            As a final test measure the resistance of the relay coil using a multimeter and check

                                            whether it is matching to the value stated by the manufacturer

                                            If all the above tests are positive we can conclude that the relay is healthy

                                            75 TRANSFORMER

                                            751 WORKING

                                            A transformer is a device that transfers electrical energy

                                            from one circuit to another through inductively coupled

                                            electrical conductors A changing current in the first circuit (the

                                            primary) creates a changing magnetic field

                                            This changing magnetic field induces a changing voltage in the second circuit (the

                                            secondary) This effect is called mutual induction

                                            If a load is connected to the secondary circuit electric charge will flow in the

                                            secondary winding of the transformer and transfer energy from the primary circuit to the

                                            load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                            of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                            number of primary turns

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            By appropriate selection of the numbers of turns a transformer thus allows an

                                            alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                            making it less

                                            752 TESTING

                                            1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                            scale and then adjusting the knob to verify its reading is an easy step to the

                                            reading of the ohm

                                            2 To check the resistance of the coil unplug or unsolder the leads of the

                                            transformer from its circuit and measure the resistance of each coil

                                            3 The next step is to test each coil for shorts to other coils

                                            76 RECTIFIER BRIDGE (W 10)

                                            761 WORKING

                                            A diode bridge rectifier is a device for converting AC or

                                            alternating current electricity into DC or direct current AC

                                            electricity goes from positive to negative constantly whereas DC

                                            always flows in the same direction

                                            AC electricity is more efficient to transmit and easier to

                                            convert into different voltages However most appliances need DC current to run A diode

                                            bridge rectifier is the most common type of power supply used to provide this current In

                                            our project W10 is a bridge rectifier which provides on single semiconductor chip

                                            77 OSCILLATOR

                                            771 Working

                                            An oscillator puts out an endless series of pulses The output

                                            constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            all digital circuits have some type of oscillator This stream of output pulses is often

                                            called a clock One of the most important features of any oscillator is its frequency stability

                                            or in other words its ability to provide a constant frequency output under varying load

                                            conditions Some of the factors that affect the frequency stability of an oscillator include

                                            temperature variations in the load and changes in the DC power supply Frequency stability

                                            of the output signal can be improved by the proper selection of the components used for the

                                            resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                            be obtained from normal LC and RC tank circuits

                                            In our project instead of 12MHz crystal 110592MHz is used because it can be

                                            divided to give you exact clock rates for most of the common baud rates for the UART

                                            especially for the higher speeds (9600 19200) These crystals are readily available and

                                            commonly used

                                            78 SWITCH

                                            781 WORKING

                                            The most familiar form of switch is a manually operated

                                            electromechanical device with one or more sets of electrical contacts

                                            Each set of contacts can be in one of two states either closed meaning

                                            the contacts are touching and electricity can flow between them or

                                            open meaning the contacts are separated and the switch is non

                                            conducting The mechanism actuating the transition between these two

                                            states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                            momentary (push-for on or push-for off) type

                                            782 USES

                                            In electronics a switch is an electrical component that can break an electrical

                                            circuit interrupting the current or diverting it from one conductor to another

                                            783 TESTING

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                            no connection Switch can tested by using multimeter in continuity range

                                            79 DARLINGTON PAIR IC (ULN2003a)

                                            791 WORKING

                                            The Darlington transistor (often called a Darlington pair) is a

                                            compound structure consisting of two bipolar transistors (either

                                            integrated or separated devices) connected in such a way that the

                                            current amplified by the first transistor is amplified further by the

                                            second one This configuration gives a much higher current gain than

                                            each transistor taken separately and in the case of integrated devices

                                            can take less space than two individual transistors because they can

                                            use a shared collector

                                            Integrated Darlington pairs come packaged singly in

                                            transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                            The Darlington transistor array used is ULN2003 Applications include relay

                                            drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                            drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                            to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                            for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                            792 FEATURES

                                            The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                            transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                            with common-cathode clamp diodes for switching inductive loads The collector-current

                                            rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                            higher current capability

                                            710 SERIES VOLTAGE REGULATER IC (78XX)

                                            7101 WORKING

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Voltage Regulator (regulator) usually having three legs converts varying input

                                            voltage and produces a constant regulated output voltage They are available in a variety of

                                            outputs

                                            The most common part numbers start with the numbers 78 or 79 and finish with two

                                            digits indicating the output voltage The number 78 represents positive voltage and 79

                                            negative one The 78XX series of voltage regulators are designed for positive input

                                            The LM78XX series typically has the ability to drive current up to 1A For

                                            application requirements up to 150mA 78LXX can be used As mentioned above the

                                            component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                            an output leg with the regulators voltage

                                            As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                            voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                            difference between the input and output appears as heat If the input voltage is unnecessarily

                                            high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                            sinking the regulator will shut down

                                            711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                            7111 WORKING

                                            The MAX-232 It includes a Charge Pump which generates

                                            +10V and -10V from a single 5v supply

                                            This IC also includes two receivers and two transmitters in

                                            the same package This is handy in many cases when we only want to

                                            use the Transmit and Receive data Lines We dont need to use two chips one for the

                                            receive line and one for the transmit There are also many variations of these devices The

                                            large value of capacitors are not only bulky but also expensive Therefore other devices are

                                            available which use smaller capacitors and even some with inbuilt capacitors However the

                                            MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                            Dual Charge-Pump Voltage Converter

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                            V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                            output

                                            712 OPTOCOUPLER IC (4N33)

                                            7121 WORKING

                                            In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                            photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                            between elements of a circuit typically a transmitter and a receiver while keeping them

                                            electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                            back to an electrical signal electrical contact along the path is broken

                                            Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                            essentially a combination of two distinct devices an optical transmitter typically a gallium

                                            arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                            light-triggered diac The two are separated by a transparent barrier which blocks any

                                            electrical current flow between the two but does allow the passage of light

                                            The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                            silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                            of isolation between driving and load circuits These Optocouplers can be used to replace

                                            reed and mercury relays with advantages of long life high speed switching and elimination

                                            of magnetic field

                                            713 MICROCONTROLLER IC (89V51 RD 2 )

                                            713 WORKING

                                            The P89V51RD2 is an 80C51 microcontroller with 64

                                            kB Flash and 1024 bytes of data RAM

                                            A key feature of the P89V51RD2 is its X2 mode option

                                            The design engineer can choose to run the application with the conventional 80C51 clock

                                            rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            achieve twice the throughput at the same clock frequency Another way to benefit from this

                                            feature is to keep the same performance by reducing the clock frequency by half thus

                                            dramatically reducing the EMI

                                            The Flash program memory supports both parallel programming and in serial In-

                                            System Programming (ISP) Parallel programming mode offers gang-programming at high

                                            speed reducing programming costs and time to market ISP allows a device to be

                                            reprogrammed in the end product under software control The capability to fieldupdate the

                                            application firmware makes a wide range of applications possible The P89V51RD2 is also

                                            In-Application Programmable (IAP) allowing the Flash program memory to be

                                            reconfigured even while the application is running

                                            714 RELIMATE CONNECTOR

                                            7141 WORKING

                                            These are wire to board type connectors used to facilitate

                                            proper and firm electrical connection between the relay card and

                                            microcontroller card

                                            The connector has following specifications

                                            No of Ways 2-20

                                            Voltage Rating 250V AC DC

                                            Current Rating 3A AC DC

                                            Contact Resistance 20mW max

                                            Insulation Resistance 1000MW min

                                            Dielectric Withstanding 1000V ACminute

                                            Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                            The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                            connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                            conflicts

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            715 RS-232 PORT CONNECTOR

                                            7151 WORKING

                                            Almost all digital devices which we use require either TTL

                                            or CMOS logic levels Therefore the first step to connecting a

                                            device to the RS-232 port is to transform the RS-232 levels back

                                            into 0 and 5 Volts This is done by RS-232 Level Converters

                                            Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                            Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                            The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                            problem in many instances where only a single supply of +5V is present

                                            CHAPTER 8

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            IMPLIMENTATION

                                            OF THE PCB

                                            Components layout designing

                                            Developing or Etching the PCB

                                            Other operations like Drilling Cutting Tinning

                                            81 IMPLIMENTATION OF THE PCB

                                            A proper PCB ensure that various circuit components are interconnected as per the

                                            circuit diagram once they have been placed on the PCB in their proper positions and

                                            subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                            base material to which is permanently attached a flat metallic network of conducting path

                                            whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                            for this project is single one

                                            The basic material used may be resin coated paper fiber glass ceramic and the flat

                                            board configuration however is most widely used and it may be of the nature of the single

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                            which ensures adequate and permanent low resistance coupling

                                            811 BOARD DESIGN

                                            PCB designed is the most important and requires great care during work In this case

                                            great care must be taken while tracing the circuit or layout on the board Because once PCB

                                            is designed it is virtually impossible to alter it While designing a circuit designer should

                                            take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                            unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                            also help to solve this problem when circuit is complicated

                                            812 THE MASTER DIAGRAM

                                            The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                            which is commonly made twice as the finished circuit since this makes the working on that

                                            much easier especially when circuit is complicated photography eventually reduces the

                                            size of diagram to that of the circuit before proceeding we must know some rules regarding

                                            the designing -

                                            a The space between the conductors must be strictly controlled to avoid the possibility

                                            of electrical discharges or unwanted capacitance The amount by which the mater

                                            diagram is to reduce in size is thus a critical deign feature

                                            b The conductor must be wider in those part of the circuits that are going to handle

                                            large current must be handle without undue temperature of conductors

                                            c The minimum width of copper should not generally be less than about 15mmThis

                                            is related to mechanical strength rather than electrical properties and it also ensure

                                            that strips remains securely bounded to the base material

                                            d The points where the component holes for component lead wire occurs must be sited

                                            to suit the dimensions of the component and dimensions between lead-out wire so

                                            that the components can be situated correctly on finished board The conductor is

                                            also main large at the point of holes

                                            813 PCB MAKING

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            When the mater diagram probable twice the size of real PCB has been evolved the

                                            test major step consists of etching or dissolving the unwanted metal from copper claded

                                            board to create a circuit as depicted by master diagram It must be stressed that very

                                            accurate checking master is essential at this stage Then the master point is mounted on a

                                            special frame on easy facing of a larger camera and with the aid of the very powerful

                                            illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                            developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                            brought into operation This comprises the camera body mounted so that sideways after

                                            each exposure In this way number of copies of the original master diagram is set out

                                            exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                            In case of simple and need of number of less PCB economic and advisable to use the

                                            following lab method of PCB making

                                            Planning The Circuit

                                            It is not a particular difficult There are several important factors that need not be

                                            taken into account if the finished device is to work properly we must consider gain factor

                                            and ensure that the input and output parts are sufficiently well isolated to avoid the

                                            possibility We must also ensure that conductors and components carrying high frequency

                                            current are well separated from the part of the circuit We are also to make sure that all

                                            components need to return to earth are properly connected and that possibility of common

                                            impedance arising earth returned

                                            Circuit is totally eliminated by making all earth as substantial possible consistent

                                            with nature of design Other factors that have to successfully studied include availability of

                                            adequate return points on board and itrsquos mounting from accessibility of switch connection

                                            made for mechanical fixing ventilation effect of vibration

                                            Cleaning The Board

                                            The copper side of the board must be thoroughly cleaned before circuit plan is

                                            transferred to it This is important because even slightest trace of graze (from figure of

                                            instance) will impure the etching process and when the circuit plan has been neatly

                                            transferred to copper in this manner the board is held under running tap and the allowed to

                                            dry before resist is applied

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Transforming the Plan

                                            Now once cleaning is done plan has to transfer on copper surface of PCB material

                                            A convenient way to do this is simply put the carbon paper between a copper surface of the

                                            board and working plan and carefully trace the lines of original plan with a ball pen

                                            Resist

                                            Resist is nothing more than a substrate that is unaffected by presence etching

                                            chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                            clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                            covered when resists the leaguer type of paints possess good resist properties but

                                            disadvantage of relatively long time taken for drying It is essential to resist through

                                            hardening before etching is started Nail polished are better as they quickly and are less

                                            difficult to remove

                                            To overcome this drying effect and to achieve the sharp edge of the trace on the

                                            PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                            short circulating due to paints are completely the avoid etching tapes and pads are available

                                            in different sizes

                                            Correcting Error

                                            When a result has been thoroughly hardened any errors that have been made can

                                            usually be corrected by gently scratching away with knife To ensure clear out lines round

                                            edges of copper conductors on board the resist must be applied with steady band

                                            Etching

                                            Next comes etching of unwanted copper amp whether a small single is all that is

                                            required as quantity of board to be produce certain precautions must be taken before

                                            operation is commenced the most used etch amp I ferrite chloride to this is added small

                                            quantity of HCL to accelerate But not critical as lab construction concerned A good

                                            etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                            grams of water

                                            Agitation

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                            the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                            laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                            gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                            temperature and thickness of copper foil

                                            Finishing Off

                                            When all unwanted copper is dissolved from areas between conductor board should

                                            be taken from an etchant amp washed in water The resist must be removed using proper

                                            solvent After this the copper surface must be polished with any kind of cleaner It should be

                                            seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                            PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                            This process is called Tinning This process of coating involve track with soldier

                                            Advantage of tinning the effect of environment of conductors then PCB is drilled

                                            ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                            Assembling On PCB

                                            After the holes are drilled the component have to be assembled on PCB before

                                            assembling the components it is necessary to clean soldering iron in order to get easy amp

                                            accurate soldering Removing impurity particles that are gathered on iron bit due to

                                            repetitive use cleans soldering iron

                                            CHAPTER 9

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            SOLDERING

                                            TECHNIQUE

                                            Technique for good soldering

                                            91 SOLDERING TECHNIQUE

                                            For soldering of any joints first the terminal to be soldered are cleaned to remove

                                            oxide film or dirt on it If required flux is applied on the points to be soldered

                                            Now the joint to be soldered is heated with the help of soldering iron Heat

                                            applied should be such that when solder wire is touched to joint it must melt

                                            quickly

                                            The joint and the soldering iron is held such that molten solder should flow

                                            smoothly over the joint

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            When joint is completely covered with molten solder the soldering iron is re-

                                            moved

                                            The joint is allowed to cool without any movement

                                            The bright shining solder indicates good soldering

                                            In case of dry solder joint a air gap remains in between the solder material and

                                            the joint It means that soldering is improper This is removed and again solder-

                                            ing is done

                                            Thus this way all the components are soldered on P C B

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 10

                                            PCB LAYOUTS

                                            Schematic diagram

                                            Bottom and top layout

                                            101 POWER SUPPLY CARD

                                            1011 SCHIMETIC DIAGRAM

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1012 LEGEND MARKING

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                            Fig1011 Schematic diagram of power supply card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1013TOP LAYER

                                            1014 BOTTOM LAYER

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                            Fig1013 Top layer of power supply

                                            card

                                            Fig1014 Schematic diagram of power supply card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            102 BATTERY CHARGER CARD

                                            1021 SCHEMATIC DIAGRAM

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                            Fig1021 Schematic diagram of battery charger card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            103 RELAY CARD

                                            1031 SCHIMETIC DIAGRAM

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                            Fig1031 Schematic diagram of Relay card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1032 RELAY CARD LEGEND MARKING

                                            1033 TOP LAYER

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                            Fig1032 Legend marking of Relay card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1034 BOTTOM LAYER

                                            104 MICROCONTROLER CARD

                                            1041 SCHIMETIC DIAGRAM

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                            Fig1034 Bottom layer of Relay card

                                            Fig1041 Schematic diagram of microcontroller card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1042 ALL LAYERS

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                            Fig1042 All layer of microcontroller card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 11

                                            INTRODUCTION

                                            OF SOFTWARE

                                            Keil (microVision 2)

                                            Eagle (Easily Applicable Graphical Layout Editor)

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            111 Keil (microVision 2)

                                            1111 Introduction to C51 Cross Compiler

                                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                            generates object code that matches the efficiency and speed of assembly programming

                                            Using a high-level language like C has many advantages over assembly language

                                            programming

                                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                            the memory structure of the 8051 CPU is desirable (but not necessary)

                                            Details like register allocation and addressing of the various memory types and data

                                            types is managed by the compiler

                                            Programs get a formal structure (which is imposed by the C programming language) and

                                            can be divided into separate functions This contributes to source code reusability as

                                            well as better overall application structure

                                            The ability to combine variable selection with specific operations improves program

                                            readability

                                            Keywords and operational functions that more nearly resemble the human thought

                                            process may be used

                                            Programming and program test time is drastically reduced

                                            The C run-time library contains many standard routines such as formatted output

                                            numeric conversions and floating-point arithmetic

                                            Existing program parts can be more easily included into new programs because of

                                            modular program construction techniques

                                            The language C is a very portable language (based on the ANSI standard) that enjoys

                                            wide popular support and is easily obtained for most systems Existing program

                                            investments can be quickly adapted to other processors as needed

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1112 Software Development Cycle in Keil

                                            When we use the Keil Software tools the

                                            project development cycle is roughly the same as

                                            it is for any other software development project

                                            1 Create a project select the target chip from the

                                            device database and configure the tool settings

                                            2 Create source files in C or assembly

                                            3 Build your application with the project

                                            manager

                                            4 Correct errors in source files

                                            5 Test the linked application A block diagram of

                                            the complete 8051 tool set may best illustrate the

                                            development cycle

                                            112 Eagle (Easily Applicable Graphical Layout Editor)

                                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                            1121 Schematic Editor

                                            In this one can develop amp design circuits for the required PCB

                                            1122 Layout Editor

                                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                            Fig 111 Software development in KEIL

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1123 Library Editor

                                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                            1124 Auto Router

                                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                                            the PCB tracks designed

                                            1125 Cam Processor

                                            This is used to finally print the various layers of the designed PCB viz Top Layer

                                            Bottom Layer Component Layer Masking Layer etc

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                            Start

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 12

                                            INTRODUCTION

                                            OF

                                            PROGRAMMING

                                            Flowchart of programming

                                            Program code

                                            121 Flowchart

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                            2

                                            flag9==1

                                            flag9=1

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                            flag11==1

                                            flag11=1 flag11=0 flag4=0

                                            REady_LED4=0

                                            Sw2_op (P01) ==0

                                            My delay (10)

                                            3 3

                                            flag2=1 disp2=1 k2=0

                                            3

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                            4

                                            flag11==1

                                            flag11=0 flag4=0 REady_LED4=0

                                            flag11=1

                                            My delay (10)

                                            flag3=1 disp3=1 k3=0

                                            k1==0||k2==0||k4==0

                                            Sw3_op (P02) ==0

                                            5

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                            flag5==1

                                            5

                                            flag11==1

                                            flag7=1

                                            flag7==1

                                            flag7=0 flag2=0 REady_LED2=0

                                            6

                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                            flag11=0 flag4=0 REady_LED4=0

                                            flag11=1

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                            6

                                            My delay (10)

                                            flag4=1 disp4=1 k4=0

                                            k1==0||k2==0||k3==0 flag5==1

                                            7

                                            Sw4_op (P03) ==0

                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                            7

                                            flag7==1

                                            flag9==1

                                            flag7=1

                                            flag7=0 flag2=0 REady_LED2=0

                                            flag9=0 flag3=0 REady_LED3=0

                                            flag9=1

                                            Sw5_op A(P04) ==0

                                            My delay (10)

                                            8

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                            9

                                            flag2==1

                                            flag3==1

                                            8

                                            flag1==1

                                            flag4==1 flag5=1 disp5=1

                                            flag9=1 disp5=1

                                            flag7=1 disp5=1

                                            flag11=1 disp5=1

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                            Sw6_op (P05) ==0

                                            My delay (10)

                                            flag2==1 ampamp flag7==1

                                            flag3==1 ampamp flag9==1 9

                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                            flag8=1 disp6=1

                                            10

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                            10

                                            flag4==1 ampamp flag11==1

                                            flag10=1 disp6=1

                                            flag12=1 disp6=1

                                            flag8==1

                                            flag10==1

                                            11

                                            flag6==1

                                            i++

                                            l++

                                            j++

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                            flag12==1

                                            M++

                                            11

                                            Stop

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            122 Program

                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                            define buzzerP2_0 buzzer indication

                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                            sbit sw5_op=P0^4 input switch5 for coin

                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                            output Led for indication

                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                            function prototype declaration

                                            void my_delay(unsigned int value) DELAY FUCTION

                                            void init_timer() timer 0 initialization function

                                            variable declaration

                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            start of main programme

                                            void main()

                                            init_timer() call it timer initialization function

                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                            start of while loop

                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                            condition for switch1

                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                            if(iltk) loop will repeat for desired time of charging

                                            if(igt=1000)

                                            buzzer=1 turn on buzzer if (ii==20)

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            REady_LED1=1 turn on ready indication of led1

                                            else if(ii==40)

                                            REady_LED1=0ii=0

                                            elseREady_LED1=0

                                            START_LED1=1

                                            else

                                            START_LED1=0

                                            k1=1 buzzer=0

                                            REady_LED1=0 flag1=0

                                            flag5=0flag6=0

                                            condition for switch2

                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                            REady_LED2=1 turn on ready 2 led indication

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            disp2=0

                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                            if(jltk)

                                            if(jgt1000) buzzer=1 if(jj==20)

                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                            elseREady_LED2=0

                                            START_LED2=1

                                            else START_LED2=0

                                            REady_LED2=0 k2=1 buzzer=0

                                            flag2=0flag7=0flag8=0

                                            j=0jj=0

                                            condition for switch 3

                                            if(flag3==1) check swich3 pressed

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            if(disp3==1 )

                                            REady_LED3=1 disp3=0

                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                            if(lltk)

                                            if(lgt1000) buzzer=1 if(ll==20)

                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                            elseREady_LED3=0

                                            START_LED3=1

                                            else START_LED3=0

                                            LED2=0 k3=1 buzzer=0

                                            REady_LED3=0 flag3=0

                                            flag9=0flag10=0

                                            l=0ll=0

                                            condition for switch 4

                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            REady_LED4=1 disp4=0

                                            if(flag11==1) check coin is pressed

                                            if(flag12==1) START is pressed

                                            if(mltk)

                                            if(mgt1000)

                                            buzzer=1 if(mm==20)

                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                            elseREady_LED4=0

                                            START_LED4=1

                                            else START_LED4=0

                                            buzzer=0 k4=1

                                            REady_LED4=0 flag4=0

                                            flag11=0flag12=0

                                            m=0mm=0

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            while(1)

                                            end of main programme

                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                            whenever specific time the interrupt will generate control will go in following function

                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if(sw1_op==0 ) ready switch flag for system1

                                            my_delay(10) CALL DELAY FUNCTION

                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                            if(flag7==1) SET THE FLAG

                                            flag7=1

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                            flag9=1

                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                            flag11=1

                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if(sw2_op==0 ) fready switch flag for system2

                                            my_delay (10)

                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                            if(flag5==1)

                                            flag5=1

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                            flag9=1

                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                            flag11=1

                                            elseflag11=0flag4=0REady_LED4=0

                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                            if(flag7==1)

                                            flag7=1

                                            else

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                            flag5=1

                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                            flag11=1

                                            elseflag11=0flag4=0REady_LED4=0

                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                            if(flag7==1)

                                            flag7=1

                                            elseflag7=0

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            flag2=0REady_LED2=0 if(flag5==1)

                                            flag5=1

                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                            flag9=1

                                            elseflag9=0flag3=0REady_LED3=0

                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                            if(flag6==1)

                                            i++ if (igt1000) ii++

                                            if (flag8==1)

                                            j++ if(jgt1000) jj++

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            if (flag10==1)

                                            l++ if (lgt1000) ll++

                                            if (flag12==1)

                                            m++ if (mgt1000) mm++

                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 13

                                            TROUBLE SHOOT

                                            Troubleshoot

                                            131 TROUBLE SHOOT

                                            A newly assembled circuit does not work may be due to -

                                            Faulty components

                                            Improper soldering

                                            Wrong connections

                                            Also any stop in working after some period may be due to -

                                            Component failure

                                            Supply failure

                                            Damaging of PCB

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Fault finding is very essential if you want the circuit to operate properly

                                            If a newly assembled circuit is not working properly check all the components and

                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                            proper soldering

                                            If faults are not observed during physical observations one should proceed for Hot

                                            test ie Voltage measurement at different points for example at Input terminal etc

                                            Resistance measurement is also done which is known as Dry test

                                            During this project work some green LEDs was not glow then we checked it

                                            continuity and replace it

                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                            heated after starting the project It happens because of some soldering points are shorted

                                            during soldering PCB We solved that problem

                                            CHAPTER 14

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            ADVANTAGES OF

                                            THE PROJECT

                                            Advantages

                                            141 ADVANTAGES OF THE PROJECT

                                            Simple and hand efficient Microcontroller based system

                                            Fast charging capacity

                                            Simple to operate

                                            Ease of mobility

                                            Facilitates connectivity for 90 of cellular phones

                                            Less expensive

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Reduced man power

                                            Low power consumption

                                            It can offer emergency charging for 4sets of handsets synchronously

                                            CHAPTER 15

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            DISADVANTAGES

                                            OF THE PROJECT

                                            Disadvantages

                                            151 DISADVANTAGES OF THE PROJECT

                                            It requires mains supply to work project

                                            Due to limited charging channels till now there may be a possibility that

                                            mobile phones of few brands cannot be connected for charging For this

                                            purpose we have to use separate connectors for that specific brand differently

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                            min

                                            It does not have battery backup therefore it cannot be portable

                                            CHAPTER 16

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            APPLICATIONS OF

                                            THE PROJECT

                                            Application

                                            161 APPLICATIONS OF THE PROJECT

                                            The coin based mobile phone charger is very useful to public for using coin to

                                            charge for the mobile phone in any places

                                            It is used for emergency charging purposes

                                            It can be installed in malls railway stations bus stops and other public

                                            places

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            The charger offers a unique revenue opportunity for a vast range of

                                            businesses - from airports to pubs from universities to health clubs virtually

                                            any location where there is a high footfall creating a large number of

                                            potential users

                                            It can be installed in offices and collages for pay charging facility

                                            CHAPTER 17

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            FUTURE

                                            DEVELOPMENT OF

                                            THE PROJECT

                                            FUTURE DEVELOPMENT OF THE PROJECT

                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                            This project is very useful to people who are using mobile phone without charging

                                            condition in public places

                                            It will use with a stereo advertisement carrier that can display video advertisement

                                            It will provide battery backup for make it portable

                                            It will also provide SMS system in future

                                            We can also increase the charging time by editing software of the project

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 18

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            COST ANALYSIS

                                            OF THE PROJECT

                                            COST ANALYSIS OF THE PROJECT

                                            181 COST ANALYSIS OF THE PROJECT

                                            1811 Component list for power supply card

                                            Footprint Quantity Designators Rate

                                            Resistor

                                            22K 1 R2 1

                                            1K 1 R1 1

                                            Capacitor

                                            1000uf25V 1 C5 10

                                            2200uf25V 1 C1 10

                                            022uf 2 C6 C2 1

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                            Table 1811 Component list for power supply card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            01uf 2 C4 C3 1

                                            IC

                                            BRIDGE W10 2 BR2 BR1 10

                                            L7812CV (TO-220) 1 U2 8

                                            L7805CV (TO-220) 1 U1 8

                                            Connector

                                            CON PHO 2PIN 2 J3 J2 16

                                            CON PHO 3PIN 1 J1 12

                                            LED3mm red 2 L1 L2 15

                                            Heat sink (TO-220) 2 16

                                            Total 955

                                            1812 Component list for battery charger card

                                            Footprint Quantity Rate

                                            Capacitor

                                            2200uf25V 1 1000

                                            022uf 4 100

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            01uf 4 100

                                            IC

                                            BRIDGE W10 1 500

                                            L7805CV (TO-220) 4 3200

                                            Connector

                                            CON PHO 2PIN 1 800

                                            Relimate 2 pin 1 400

                                            relimate 3 pin 4 2000

                                            Heat sink (TO-220) 4 1200

                                            TOTAL 9300

                                            1813 Component list for Relay card

                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                            Table 1812Component list for battery charger card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                            Total 18900

                                            1814Component list for controller card

                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                            Table 1813Component list for relay card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                            total 27000

                                            1815 Miscellaneous material

                                            Material Quantity Rate

                                            electronic item

                                            Transformer

                                            TXR1 0-9-15 1 20000

                                            0-9 1A

                                            0-15 100mA

                                            TXR2 0-9 1 16500

                                            0-9 1A

                                            Proximity switch 1 20000

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                            Table 1814Component list for microcontroller card

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Red push bottom 4 4000

                                            Green push button 1 1000

                                            Red led 5mm 4 800

                                            Green led 5mm 4 800

                                            Led holder 8 1600

                                            Copper clad 2 4000

                                            3 core cable 1 meter 1500

                                            3 pin plug 1 3000

                                            2 pin relimate wire 19 9000

                                            3 pin relimate wire 5 3750

                                            4 pin relimate wire 2 2000

                                            mechanical items

                                            Enclosure 1 25000

                                            Acrylic sheet 2 X 1 30000

                                            12mm cable gland 1 1000

                                            Screw 3mm 33 2000

                                            Screw 35mm 6 2400

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            10 mm spacers 100 1500

                                            10mm insert to stud 50 10000

                                            cable tie 2500

                                            Total 162350

                                            CHAPTER 19

                                            APPENDIX

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                                            Table 1815Component list for miscellaneous material

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            APPENDIX

                                            191 APPENDIX

                                            1911 78xx IC datasheet

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1912 W10 datasheet

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1913 4n33 IC datasheet

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                            1914 MAX 232

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1915 ULN2003a IC datasheet

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            1916 89V51RD2 IC datasheet

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 20

                                            CONCLUSION

                                            CONCLUSION

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            201 CONCLUSION

                                            The coin-operated mobile phone charger is already successfully installed in

                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                            installed in any business premises

                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                            from airports to pubs from universities to health clubs virtually any location where there is

                                            a high footfall creating a large number of potential users

                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                            extend low mobile phone talk time provide battery charging

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 21

                                            IMAGES OF THE

                                            PROJECT

                                            Images of the project

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            211 IMAGES OF THE PROJECT

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                            fig211 lsquoCoin operated mobile battery charger

                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Fig 216 Relay driver circuit

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                            Fig 213 Constant voltage battery charger circuit

                                            Fig214 Power supply circuit

                                            Fig215 Metal detector proximity switch

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Fig217 Microcontroller circuit

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            Fig228 coin operated mobile battery charger project presentation

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            CHAPTER 22

                                            BIBILOGRAPHY

                                            BIBLIOGRAPHY

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                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                            221 BIBLIOGRAPHY

                                            BOOKS

                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                            INTERNET LINKS

                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                            • CHAPTER 1

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              543 PORT ASSIGNMENTS FOR 89V51RD2FN

                                              P00 = switch1 for channel 1

                                              P01 = switch2 for channel 2

                                              P02 = switch3 for channel 3

                                              P03 = switch4 for channel 4

                                              P04 = switch5 for coin input sensor (proximity switch)

                                              P05 = switch6 for start charging

                                              P10 = channel 1 red LED1 (ready system)

                                              P11 = channel 2 red LED2 (ready system2)

                                              P12 = channel 3 red LED3 (ready system3)

                                              P13 = channel 4 red LED4 (ready system4)

                                              P14 = channel 1 relay (start system1)

                                              P15 = channel 2 relay (start system2)

                                              P16 = channel 3 relay (start system3)

                                              P17 = channel 4 relay (start system4)

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 23

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 6

                                              LIST OF THE

                                              COMPONENTS

                                              List of the components

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              61 LIST OF THE COMPONETS

                                              RESISTORS

                                              CAPACITORS

                                              LIGHT EMITING DIODES (LEDS)- Green Red

                                              RELAYrsquoS-

                                              TRANSFORMERS

                                              RECTIFIER BRIDGES (W 10)

                                              OSCILLATOR

                                              SWITCHES- Push switches

                                              DARLINGTON PAIR IC (ULN2003a)

                                              SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                              SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                              OPTOCOUPLER IC (4N33)

                                              MICROCONTROLLER IC (89V51 RD2)

                                              RELIMATE CONNECTOR- 2 pin amp 4 pin

                                              RS-232 PORT CONNECTOR

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 7

                                              INTRODUCTION

                                              OF COMPONENTS

                                              Working of components

                                              Features or Uses of components

                                              Testing of components

                                              71 RESISTOR

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              711 WORKING

                                              Resistors limit current Resistors are considered to be the most used and the most

                                              important component of all the electronic circuits Resistors resist the flow of electrical

                                              current The higher the value of resistance (measured in ohms)

                                              the lower the current will be

                                              712 TESTING

                                              Read the indicated color code value then select the OHM-scale within but not way

                                              below the indicated value A resistor is good if its resistance is close to the indicated

                                              Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                              all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                              ohmmeter scale settings resistor is shorted

                                              713 SPECIFICATIONS

                                              To completely specify a resistors characteristics requires knowledge of the following

                                              parameters-

                                              bull Value

                                              bull Tolerance

                                              bull Temperature Coefficient

                                              bull Power Rating

                                              The specification of a resistor may be marked on its surface using either of two

                                              systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                              the second more recent system uses a combination of alpha-numeric characters

                                              7 2 CAPACITOR

                                              721 WORKING

                                              When DC voltage is applied to the capacitor an electric charge is stored on each

                                              electrode While the capacitor is charging up current flows The current will stop flowing

                                              when the capacitor has fully charged Capacitors find use

                                              in circuits for a variety of purposes They are used in

                                              time delay generation RC circuits In power supplies for filtering and power supply

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              decoupling as blocking capacitors for power factor correction and motor starting in LC

                                              tank circuits and so on

                                              722 TESTING

                                              To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                              negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                              A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                              and moves back again to infinite resistance position A defective indication for an

                                              electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                              which is an indication that the capacitor is shorted

                                              73 LIGHT EMITING DIODE (LED)

                                              731 WORKING

                                              LEDs are special diodes that emit light when

                                              connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                              indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                              the heart of an LED the semi-conductor chip

                                              In our project Green LED are used here for mainly two purpose

                                              a Charging ON indication (when ON)

                                              b Channel fault indication (always OFF)

                                              732 TESTING

                                              The good and working LED will then light up or glow a busted LED will not LEDs

                                              must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                              1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                              directly connected to a battery or power supply It will be destroyed the LED

                                              733 FEATURES

                                              Single color

                                              High bright output

                                              Low power consumption

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              High reliability and long life

                                              734 Descriptions

                                              Dice material GaInN

                                              Emitting Color Super Bright White

                                              Device Outlineφ5mm Round Type

                                              Lens Type Water Clear

                                              74 RELAY

                                              741 WORKING

                                              A relay is an electrically operated switch Current

                                              flowing through the coil of the relay creates a magnetic field

                                              which attracts a lever and changes the switch contacts The coil

                                              current can be on or off so relays have two switch positions and

                                              most have double throw (changeover) switch contacts

                                              Relays are like remote control switches and are used in

                                              many applications because of their relative simplicity long life

                                              and proven high reliability

                                              742 USES

                                              The main operation of a relay comes in places where only a low-power signal can be

                                              used to control a circuit

                                              It is also used in places where only one signal can be used to control a lot of circuits

                                              The application of relays started during the invention of telephones They played an

                                              important role in switching calls in telephone exchanges They were also used in

                                              long distance telegraphy They were used to switch the signal coming from one

                                              source to another destination

                                              743 TESTING

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              A relay will usually have a coil pole terminal and a set of

                                              contacts The set of contacts that are open when the relay is not

                                              energized are called normally open (NO) contacts and the set of

                                              contacts that are closed when the relay is not energized are called

                                              normally closed (NC) contacts The following steps can be used to perform the testing of

                                              the relay using a multimeter

                                              Keep the multimeter in the continuity check mode

                                              Check for continuity between the NC contacts and pole

                                              Check for discontinuity between NO contacts and the pole

                                              Now energies the relay using the rated voltage For example use a 9V battery for

                                              energizing a 9V relay The relay will engage with clicking sound

                                              Now check for continuity between NO contacts and pole

                                              Also check for discontinuity between NC contacts and pole

                                              As a final test measure the resistance of the relay coil using a multimeter and check

                                              whether it is matching to the value stated by the manufacturer

                                              If all the above tests are positive we can conclude that the relay is healthy

                                              75 TRANSFORMER

                                              751 WORKING

                                              A transformer is a device that transfers electrical energy

                                              from one circuit to another through inductively coupled

                                              electrical conductors A changing current in the first circuit (the

                                              primary) creates a changing magnetic field

                                              This changing magnetic field induces a changing voltage in the second circuit (the

                                              secondary) This effect is called mutual induction

                                              If a load is connected to the secondary circuit electric charge will flow in the

                                              secondary winding of the transformer and transfer energy from the primary circuit to the

                                              load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                              of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                              number of primary turns

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              By appropriate selection of the numbers of turns a transformer thus allows an

                                              alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                              making it less

                                              752 TESTING

                                              1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                              scale and then adjusting the knob to verify its reading is an easy step to the

                                              reading of the ohm

                                              2 To check the resistance of the coil unplug or unsolder the leads of the

                                              transformer from its circuit and measure the resistance of each coil

                                              3 The next step is to test each coil for shorts to other coils

                                              76 RECTIFIER BRIDGE (W 10)

                                              761 WORKING

                                              A diode bridge rectifier is a device for converting AC or

                                              alternating current electricity into DC or direct current AC

                                              electricity goes from positive to negative constantly whereas DC

                                              always flows in the same direction

                                              AC electricity is more efficient to transmit and easier to

                                              convert into different voltages However most appliances need DC current to run A diode

                                              bridge rectifier is the most common type of power supply used to provide this current In

                                              our project W10 is a bridge rectifier which provides on single semiconductor chip

                                              77 OSCILLATOR

                                              771 Working

                                              An oscillator puts out an endless series of pulses The output

                                              constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              all digital circuits have some type of oscillator This stream of output pulses is often

                                              called a clock One of the most important features of any oscillator is its frequency stability

                                              or in other words its ability to provide a constant frequency output under varying load

                                              conditions Some of the factors that affect the frequency stability of an oscillator include

                                              temperature variations in the load and changes in the DC power supply Frequency stability

                                              of the output signal can be improved by the proper selection of the components used for the

                                              resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                              be obtained from normal LC and RC tank circuits

                                              In our project instead of 12MHz crystal 110592MHz is used because it can be

                                              divided to give you exact clock rates for most of the common baud rates for the UART

                                              especially for the higher speeds (9600 19200) These crystals are readily available and

                                              commonly used

                                              78 SWITCH

                                              781 WORKING

                                              The most familiar form of switch is a manually operated

                                              electromechanical device with one or more sets of electrical contacts

                                              Each set of contacts can be in one of two states either closed meaning

                                              the contacts are touching and electricity can flow between them or

                                              open meaning the contacts are separated and the switch is non

                                              conducting The mechanism actuating the transition between these two

                                              states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                              momentary (push-for on or push-for off) type

                                              782 USES

                                              In electronics a switch is an electrical component that can break an electrical

                                              circuit interrupting the current or diverting it from one conductor to another

                                              783 TESTING

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                              no connection Switch can tested by using multimeter in continuity range

                                              79 DARLINGTON PAIR IC (ULN2003a)

                                              791 WORKING

                                              The Darlington transistor (often called a Darlington pair) is a

                                              compound structure consisting of two bipolar transistors (either

                                              integrated or separated devices) connected in such a way that the

                                              current amplified by the first transistor is amplified further by the

                                              second one This configuration gives a much higher current gain than

                                              each transistor taken separately and in the case of integrated devices

                                              can take less space than two individual transistors because they can

                                              use a shared collector

                                              Integrated Darlington pairs come packaged singly in

                                              transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                              The Darlington transistor array used is ULN2003 Applications include relay

                                              drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                              drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                              to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                              for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                              792 FEATURES

                                              The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                              transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                              with common-cathode clamp diodes for switching inductive loads The collector-current

                                              rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                              higher current capability

                                              710 SERIES VOLTAGE REGULATER IC (78XX)

                                              7101 WORKING

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Voltage Regulator (regulator) usually having three legs converts varying input

                                              voltage and produces a constant regulated output voltage They are available in a variety of

                                              outputs

                                              The most common part numbers start with the numbers 78 or 79 and finish with two

                                              digits indicating the output voltage The number 78 represents positive voltage and 79

                                              negative one The 78XX series of voltage regulators are designed for positive input

                                              The LM78XX series typically has the ability to drive current up to 1A For

                                              application requirements up to 150mA 78LXX can be used As mentioned above the

                                              component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                              an output leg with the regulators voltage

                                              As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                              voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                              difference between the input and output appears as heat If the input voltage is unnecessarily

                                              high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                              sinking the regulator will shut down

                                              711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                              7111 WORKING

                                              The MAX-232 It includes a Charge Pump which generates

                                              +10V and -10V from a single 5v supply

                                              This IC also includes two receivers and two transmitters in

                                              the same package This is handy in many cases when we only want to

                                              use the Transmit and Receive data Lines We dont need to use two chips one for the

                                              receive line and one for the transmit There are also many variations of these devices The

                                              large value of capacitors are not only bulky but also expensive Therefore other devices are

                                              available which use smaller capacitors and even some with inbuilt capacitors However the

                                              MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                              Dual Charge-Pump Voltage Converter

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                              V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                              output

                                              712 OPTOCOUPLER IC (4N33)

                                              7121 WORKING

                                              In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                              photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                              between elements of a circuit typically a transmitter and a receiver while keeping them

                                              electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                              back to an electrical signal electrical contact along the path is broken

                                              Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                              essentially a combination of two distinct devices an optical transmitter typically a gallium

                                              arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                              light-triggered diac The two are separated by a transparent barrier which blocks any

                                              electrical current flow between the two but does allow the passage of light

                                              The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                              silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                              of isolation between driving and load circuits These Optocouplers can be used to replace

                                              reed and mercury relays with advantages of long life high speed switching and elimination

                                              of magnetic field

                                              713 MICROCONTROLLER IC (89V51 RD 2 )

                                              713 WORKING

                                              The P89V51RD2 is an 80C51 microcontroller with 64

                                              kB Flash and 1024 bytes of data RAM

                                              A key feature of the P89V51RD2 is its X2 mode option

                                              The design engineer can choose to run the application with the conventional 80C51 clock

                                              rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              achieve twice the throughput at the same clock frequency Another way to benefit from this

                                              feature is to keep the same performance by reducing the clock frequency by half thus

                                              dramatically reducing the EMI

                                              The Flash program memory supports both parallel programming and in serial In-

                                              System Programming (ISP) Parallel programming mode offers gang-programming at high

                                              speed reducing programming costs and time to market ISP allows a device to be

                                              reprogrammed in the end product under software control The capability to fieldupdate the

                                              application firmware makes a wide range of applications possible The P89V51RD2 is also

                                              In-Application Programmable (IAP) allowing the Flash program memory to be

                                              reconfigured even while the application is running

                                              714 RELIMATE CONNECTOR

                                              7141 WORKING

                                              These are wire to board type connectors used to facilitate

                                              proper and firm electrical connection between the relay card and

                                              microcontroller card

                                              The connector has following specifications

                                              No of Ways 2-20

                                              Voltage Rating 250V AC DC

                                              Current Rating 3A AC DC

                                              Contact Resistance 20mW max

                                              Insulation Resistance 1000MW min

                                              Dielectric Withstanding 1000V ACminute

                                              Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                              The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                              connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                              conflicts

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              715 RS-232 PORT CONNECTOR

                                              7151 WORKING

                                              Almost all digital devices which we use require either TTL

                                              or CMOS logic levels Therefore the first step to connecting a

                                              device to the RS-232 port is to transform the RS-232 levels back

                                              into 0 and 5 Volts This is done by RS-232 Level Converters

                                              Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                              Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                              The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                              problem in many instances where only a single supply of +5V is present

                                              CHAPTER 8

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              IMPLIMENTATION

                                              OF THE PCB

                                              Components layout designing

                                              Developing or Etching the PCB

                                              Other operations like Drilling Cutting Tinning

                                              81 IMPLIMENTATION OF THE PCB

                                              A proper PCB ensure that various circuit components are interconnected as per the

                                              circuit diagram once they have been placed on the PCB in their proper positions and

                                              subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                              base material to which is permanently attached a flat metallic network of conducting path

                                              whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                              for this project is single one

                                              The basic material used may be resin coated paper fiber glass ceramic and the flat

                                              board configuration however is most widely used and it may be of the nature of the single

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                              which ensures adequate and permanent low resistance coupling

                                              811 BOARD DESIGN

                                              PCB designed is the most important and requires great care during work In this case

                                              great care must be taken while tracing the circuit or layout on the board Because once PCB

                                              is designed it is virtually impossible to alter it While designing a circuit designer should

                                              take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                              unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                              also help to solve this problem when circuit is complicated

                                              812 THE MASTER DIAGRAM

                                              The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                              which is commonly made twice as the finished circuit since this makes the working on that

                                              much easier especially when circuit is complicated photography eventually reduces the

                                              size of diagram to that of the circuit before proceeding we must know some rules regarding

                                              the designing -

                                              a The space between the conductors must be strictly controlled to avoid the possibility

                                              of electrical discharges or unwanted capacitance The amount by which the mater

                                              diagram is to reduce in size is thus a critical deign feature

                                              b The conductor must be wider in those part of the circuits that are going to handle

                                              large current must be handle without undue temperature of conductors

                                              c The minimum width of copper should not generally be less than about 15mmThis

                                              is related to mechanical strength rather than electrical properties and it also ensure

                                              that strips remains securely bounded to the base material

                                              d The points where the component holes for component lead wire occurs must be sited

                                              to suit the dimensions of the component and dimensions between lead-out wire so

                                              that the components can be situated correctly on finished board The conductor is

                                              also main large at the point of holes

                                              813 PCB MAKING

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              When the mater diagram probable twice the size of real PCB has been evolved the

                                              test major step consists of etching or dissolving the unwanted metal from copper claded

                                              board to create a circuit as depicted by master diagram It must be stressed that very

                                              accurate checking master is essential at this stage Then the master point is mounted on a

                                              special frame on easy facing of a larger camera and with the aid of the very powerful

                                              illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                              developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                              brought into operation This comprises the camera body mounted so that sideways after

                                              each exposure In this way number of copies of the original master diagram is set out

                                              exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                              In case of simple and need of number of less PCB economic and advisable to use the

                                              following lab method of PCB making

                                              Planning The Circuit

                                              It is not a particular difficult There are several important factors that need not be

                                              taken into account if the finished device is to work properly we must consider gain factor

                                              and ensure that the input and output parts are sufficiently well isolated to avoid the

                                              possibility We must also ensure that conductors and components carrying high frequency

                                              current are well separated from the part of the circuit We are also to make sure that all

                                              components need to return to earth are properly connected and that possibility of common

                                              impedance arising earth returned

                                              Circuit is totally eliminated by making all earth as substantial possible consistent

                                              with nature of design Other factors that have to successfully studied include availability of

                                              adequate return points on board and itrsquos mounting from accessibility of switch connection

                                              made for mechanical fixing ventilation effect of vibration

                                              Cleaning The Board

                                              The copper side of the board must be thoroughly cleaned before circuit plan is

                                              transferred to it This is important because even slightest trace of graze (from figure of

                                              instance) will impure the etching process and when the circuit plan has been neatly

                                              transferred to copper in this manner the board is held under running tap and the allowed to

                                              dry before resist is applied

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Transforming the Plan

                                              Now once cleaning is done plan has to transfer on copper surface of PCB material

                                              A convenient way to do this is simply put the carbon paper between a copper surface of the

                                              board and working plan and carefully trace the lines of original plan with a ball pen

                                              Resist

                                              Resist is nothing more than a substrate that is unaffected by presence etching

                                              chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                              clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                              covered when resists the leaguer type of paints possess good resist properties but

                                              disadvantage of relatively long time taken for drying It is essential to resist through

                                              hardening before etching is started Nail polished are better as they quickly and are less

                                              difficult to remove

                                              To overcome this drying effect and to achieve the sharp edge of the trace on the

                                              PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                              short circulating due to paints are completely the avoid etching tapes and pads are available

                                              in different sizes

                                              Correcting Error

                                              When a result has been thoroughly hardened any errors that have been made can

                                              usually be corrected by gently scratching away with knife To ensure clear out lines round

                                              edges of copper conductors on board the resist must be applied with steady band

                                              Etching

                                              Next comes etching of unwanted copper amp whether a small single is all that is

                                              required as quantity of board to be produce certain precautions must be taken before

                                              operation is commenced the most used etch amp I ferrite chloride to this is added small

                                              quantity of HCL to accelerate But not critical as lab construction concerned A good

                                              etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                              grams of water

                                              Agitation

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                              the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                              laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                              gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                              temperature and thickness of copper foil

                                              Finishing Off

                                              When all unwanted copper is dissolved from areas between conductor board should

                                              be taken from an etchant amp washed in water The resist must be removed using proper

                                              solvent After this the copper surface must be polished with any kind of cleaner It should be

                                              seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                              PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                              This process is called Tinning This process of coating involve track with soldier

                                              Advantage of tinning the effect of environment of conductors then PCB is drilled

                                              ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                              Assembling On PCB

                                              After the holes are drilled the component have to be assembled on PCB before

                                              assembling the components it is necessary to clean soldering iron in order to get easy amp

                                              accurate soldering Removing impurity particles that are gathered on iron bit due to

                                              repetitive use cleans soldering iron

                                              CHAPTER 9

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              SOLDERING

                                              TECHNIQUE

                                              Technique for good soldering

                                              91 SOLDERING TECHNIQUE

                                              For soldering of any joints first the terminal to be soldered are cleaned to remove

                                              oxide film or dirt on it If required flux is applied on the points to be soldered

                                              Now the joint to be soldered is heated with the help of soldering iron Heat

                                              applied should be such that when solder wire is touched to joint it must melt

                                              quickly

                                              The joint and the soldering iron is held such that molten solder should flow

                                              smoothly over the joint

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              When joint is completely covered with molten solder the soldering iron is re-

                                              moved

                                              The joint is allowed to cool without any movement

                                              The bright shining solder indicates good soldering

                                              In case of dry solder joint a air gap remains in between the solder material and

                                              the joint It means that soldering is improper This is removed and again solder-

                                              ing is done

                                              Thus this way all the components are soldered on P C B

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 10

                                              PCB LAYOUTS

                                              Schematic diagram

                                              Bottom and top layout

                                              101 POWER SUPPLY CARD

                                              1011 SCHIMETIC DIAGRAM

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1012 LEGEND MARKING

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                              Fig1011 Schematic diagram of power supply card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1013TOP LAYER

                                              1014 BOTTOM LAYER

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                              Fig1013 Top layer of power supply

                                              card

                                              Fig1014 Schematic diagram of power supply card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              102 BATTERY CHARGER CARD

                                              1021 SCHEMATIC DIAGRAM

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                              Fig1021 Schematic diagram of battery charger card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              103 RELAY CARD

                                              1031 SCHIMETIC DIAGRAM

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                              Fig1031 Schematic diagram of Relay card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1032 RELAY CARD LEGEND MARKING

                                              1033 TOP LAYER

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                              Fig1032 Legend marking of Relay card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1034 BOTTOM LAYER

                                              104 MICROCONTROLER CARD

                                              1041 SCHIMETIC DIAGRAM

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                              Fig1034 Bottom layer of Relay card

                                              Fig1041 Schematic diagram of microcontroller card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1042 ALL LAYERS

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                              Fig1042 All layer of microcontroller card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 11

                                              INTRODUCTION

                                              OF SOFTWARE

                                              Keil (microVision 2)

                                              Eagle (Easily Applicable Graphical Layout Editor)

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              111 Keil (microVision 2)

                                              1111 Introduction to C51 Cross Compiler

                                              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                              generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                              generates object code that matches the efficiency and speed of assembly programming

                                              Using a high-level language like C has many advantages over assembly language

                                              programming

                                              Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                              the memory structure of the 8051 CPU is desirable (but not necessary)

                                              Details like register allocation and addressing of the various memory types and data

                                              types is managed by the compiler

                                              Programs get a formal structure (which is imposed by the C programming language) and

                                              can be divided into separate functions This contributes to source code reusability as

                                              well as better overall application structure

                                              The ability to combine variable selection with specific operations improves program

                                              readability

                                              Keywords and operational functions that more nearly resemble the human thought

                                              process may be used

                                              Programming and program test time is drastically reduced

                                              The C run-time library contains many standard routines such as formatted output

                                              numeric conversions and floating-point arithmetic

                                              Existing program parts can be more easily included into new programs because of

                                              modular program construction techniques

                                              The language C is a very portable language (based on the ANSI standard) that enjoys

                                              wide popular support and is easily obtained for most systems Existing program

                                              investments can be quickly adapted to other processors as needed

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1112 Software Development Cycle in Keil

                                              When we use the Keil Software tools the

                                              project development cycle is roughly the same as

                                              it is for any other software development project

                                              1 Create a project select the target chip from the

                                              device database and configure the tool settings

                                              2 Create source files in C or assembly

                                              3 Build your application with the project

                                              manager

                                              4 Correct errors in source files

                                              5 Test the linked application A block diagram of

                                              the complete 8051 tool set may best illustrate the

                                              development cycle

                                              112 Eagle (Easily Applicable Graphical Layout Editor)

                                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                              1121 Schematic Editor

                                              In this one can develop amp design circuits for the required PCB

                                              1122 Layout Editor

                                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                              Fig 111 Software development in KEIL

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1123 Library Editor

                                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                              1124 Auto Router

                                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                                              the PCB tracks designed

                                              1125 Cam Processor

                                              This is used to finally print the various layers of the designed PCB viz Top Layer

                                              Bottom Layer Component Layer Masking Layer etc

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                              Start

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 12

                                              INTRODUCTION

                                              OF

                                              PROGRAMMING

                                              Flowchart of programming

                                              Program code

                                              121 Flowchart

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                              2

                                              flag9==1

                                              flag9=1

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                              flag11==1

                                              flag11=1 flag11=0 flag4=0

                                              REady_LED4=0

                                              Sw2_op (P01) ==0

                                              My delay (10)

                                              3 3

                                              flag2=1 disp2=1 k2=0

                                              3

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                              4

                                              flag11==1

                                              flag11=0 flag4=0 REady_LED4=0

                                              flag11=1

                                              My delay (10)

                                              flag3=1 disp3=1 k3=0

                                              k1==0||k2==0||k4==0

                                              Sw3_op (P02) ==0

                                              5

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                              flag5==1

                                              5

                                              flag11==1

                                              flag7=1

                                              flag7==1

                                              flag7=0 flag2=0 REady_LED2=0

                                              6

                                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                              flag11=0 flag4=0 REady_LED4=0

                                              flag11=1

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                              6

                                              My delay (10)

                                              flag4=1 disp4=1 k4=0

                                              k1==0||k2==0||k3==0 flag5==1

                                              7

                                              Sw4_op (P03) ==0

                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                              7

                                              flag7==1

                                              flag9==1

                                              flag7=1

                                              flag7=0 flag2=0 REady_LED2=0

                                              flag9=0 flag3=0 REady_LED3=0

                                              flag9=1

                                              Sw5_op A(P04) ==0

                                              My delay (10)

                                              8

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                              9

                                              flag2==1

                                              flag3==1

                                              8

                                              flag1==1

                                              flag4==1 flag5=1 disp5=1

                                              flag9=1 disp5=1

                                              flag7=1 disp5=1

                                              flag11=1 disp5=1

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                              Sw6_op (P05) ==0

                                              My delay (10)

                                              flag2==1 ampamp flag7==1

                                              flag3==1 ampamp flag9==1 9

                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                              flag8=1 disp6=1

                                              10

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                              10

                                              flag4==1 ampamp flag11==1

                                              flag10=1 disp6=1

                                              flag12=1 disp6=1

                                              flag8==1

                                              flag10==1

                                              11

                                              flag6==1

                                              i++

                                              l++

                                              j++

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                              flag12==1

                                              M++

                                              11

                                              Stop

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              122 Program

                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                              define buzzerP2_0 buzzer indication

                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                              sbit sw5_op=P0^4 input switch5 for coin

                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                              output Led for indication

                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                              function prototype declaration

                                              void my_delay(unsigned int value) DELAY FUCTION

                                              void init_timer() timer 0 initialization function

                                              variable declaration

                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              start of main programme

                                              void main()

                                              init_timer() call it timer initialization function

                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                              start of while loop

                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                              condition for switch1

                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                              if(iltk) loop will repeat for desired time of charging

                                              if(igt=1000)

                                              buzzer=1 turn on buzzer if (ii==20)

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              REady_LED1=1 turn on ready indication of led1

                                              else if(ii==40)

                                              REady_LED1=0ii=0

                                              elseREady_LED1=0

                                              START_LED1=1

                                              else

                                              START_LED1=0

                                              k1=1 buzzer=0

                                              REady_LED1=0 flag1=0

                                              flag5=0flag6=0

                                              condition for switch2

                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                              REady_LED2=1 turn on ready 2 led indication

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              disp2=0

                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                              if(jltk)

                                              if(jgt1000) buzzer=1 if(jj==20)

                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                              elseREady_LED2=0

                                              START_LED2=1

                                              else START_LED2=0

                                              REady_LED2=0 k2=1 buzzer=0

                                              flag2=0flag7=0flag8=0

                                              j=0jj=0

                                              condition for switch 3

                                              if(flag3==1) check swich3 pressed

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              if(disp3==1 )

                                              REady_LED3=1 disp3=0

                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                              if(lltk)

                                              if(lgt1000) buzzer=1 if(ll==20)

                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                              elseREady_LED3=0

                                              START_LED3=1

                                              else START_LED3=0

                                              LED2=0 k3=1 buzzer=0

                                              REady_LED3=0 flag3=0

                                              flag9=0flag10=0

                                              l=0ll=0

                                              condition for switch 4

                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              REady_LED4=1 disp4=0

                                              if(flag11==1) check coin is pressed

                                              if(flag12==1) START is pressed

                                              if(mltk)

                                              if(mgt1000)

                                              buzzer=1 if(mm==20)

                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                              elseREady_LED4=0

                                              START_LED4=1

                                              else START_LED4=0

                                              buzzer=0 k4=1

                                              REady_LED4=0 flag4=0

                                              flag11=0flag12=0

                                              m=0mm=0

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              while(1)

                                              end of main programme

                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                              whenever specific time the interrupt will generate control will go in following function

                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if(sw1_op==0 ) ready switch flag for system1

                                              my_delay(10) CALL DELAY FUNCTION

                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                              if(flag7==1) SET THE FLAG

                                              flag7=1

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                              flag9=1

                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                              flag11=1

                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if(sw2_op==0 ) fready switch flag for system2

                                              my_delay (10)

                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                              if(flag5==1)

                                              flag5=1

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                              flag9=1

                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                              flag11=1

                                              elseflag11=0flag4=0REady_LED4=0

                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                              if(flag7==1)

                                              flag7=1

                                              else

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                              flag5=1

                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                              flag11=1

                                              elseflag11=0flag4=0REady_LED4=0

                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                              if(flag7==1)

                                              flag7=1

                                              elseflag7=0

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              flag2=0REady_LED2=0 if(flag5==1)

                                              flag5=1

                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                              flag9=1

                                              elseflag9=0flag3=0REady_LED3=0

                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                              if(flag6==1)

                                              i++ if (igt1000) ii++

                                              if (flag8==1)

                                              j++ if(jgt1000) jj++

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              if (flag10==1)

                                              l++ if (lgt1000) ll++

                                              if (flag12==1)

                                              m++ if (mgt1000) mm++

                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 13

                                              TROUBLE SHOOT

                                              Troubleshoot

                                              131 TROUBLE SHOOT

                                              A newly assembled circuit does not work may be due to -

                                              Faulty components

                                              Improper soldering

                                              Wrong connections

                                              Also any stop in working after some period may be due to -

                                              Component failure

                                              Supply failure

                                              Damaging of PCB

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Fault finding is very essential if you want the circuit to operate properly

                                              If a newly assembled circuit is not working properly check all the components and

                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                              proper soldering

                                              If faults are not observed during physical observations one should proceed for Hot

                                              test ie Voltage measurement at different points for example at Input terminal etc

                                              Resistance measurement is also done which is known as Dry test

                                              During this project work some green LEDs was not glow then we checked it

                                              continuity and replace it

                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                              heated after starting the project It happens because of some soldering points are shorted

                                              during soldering PCB We solved that problem

                                              CHAPTER 14

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              ADVANTAGES OF

                                              THE PROJECT

                                              Advantages

                                              141 ADVANTAGES OF THE PROJECT

                                              Simple and hand efficient Microcontroller based system

                                              Fast charging capacity

                                              Simple to operate

                                              Ease of mobility

                                              Facilitates connectivity for 90 of cellular phones

                                              Less expensive

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Reduced man power

                                              Low power consumption

                                              It can offer emergency charging for 4sets of handsets synchronously

                                              CHAPTER 15

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              DISADVANTAGES

                                              OF THE PROJECT

                                              Disadvantages

                                              151 DISADVANTAGES OF THE PROJECT

                                              It requires mains supply to work project

                                              Due to limited charging channels till now there may be a possibility that

                                              mobile phones of few brands cannot be connected for charging For this

                                              purpose we have to use separate connectors for that specific brand differently

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                              min

                                              It does not have battery backup therefore it cannot be portable

                                              CHAPTER 16

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              APPLICATIONS OF

                                              THE PROJECT

                                              Application

                                              161 APPLICATIONS OF THE PROJECT

                                              The coin based mobile phone charger is very useful to public for using coin to

                                              charge for the mobile phone in any places

                                              It is used for emergency charging purposes

                                              It can be installed in malls railway stations bus stops and other public

                                              places

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              The charger offers a unique revenue opportunity for a vast range of

                                              businesses - from airports to pubs from universities to health clubs virtually

                                              any location where there is a high footfall creating a large number of

                                              potential users

                                              It can be installed in offices and collages for pay charging facility

                                              CHAPTER 17

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              FUTURE

                                              DEVELOPMENT OF

                                              THE PROJECT

                                              FUTURE DEVELOPMENT OF THE PROJECT

                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                              This project is very useful to people who are using mobile phone without charging

                                              condition in public places

                                              It will use with a stereo advertisement carrier that can display video advertisement

                                              It will provide battery backup for make it portable

                                              It will also provide SMS system in future

                                              We can also increase the charging time by editing software of the project

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                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 18

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              COST ANALYSIS

                                              OF THE PROJECT

                                              COST ANALYSIS OF THE PROJECT

                                              181 COST ANALYSIS OF THE PROJECT

                                              1811 Component list for power supply card

                                              Footprint Quantity Designators Rate

                                              Resistor

                                              22K 1 R2 1

                                              1K 1 R1 1

                                              Capacitor

                                              1000uf25V 1 C5 10

                                              2200uf25V 1 C1 10

                                              022uf 2 C6 C2 1

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                              Table 1811 Component list for power supply card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              01uf 2 C4 C3 1

                                              IC

                                              BRIDGE W10 2 BR2 BR1 10

                                              L7812CV (TO-220) 1 U2 8

                                              L7805CV (TO-220) 1 U1 8

                                              Connector

                                              CON PHO 2PIN 2 J3 J2 16

                                              CON PHO 3PIN 1 J1 12

                                              LED3mm red 2 L1 L2 15

                                              Heat sink (TO-220) 2 16

                                              Total 955

                                              1812 Component list for battery charger card

                                              Footprint Quantity Rate

                                              Capacitor

                                              2200uf25V 1 1000

                                              022uf 4 100

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              01uf 4 100

                                              IC

                                              BRIDGE W10 1 500

                                              L7805CV (TO-220) 4 3200

                                              Connector

                                              CON PHO 2PIN 1 800

                                              Relimate 2 pin 1 400

                                              relimate 3 pin 4 2000

                                              Heat sink (TO-220) 4 1200

                                              TOTAL 9300

                                              1813 Component list for Relay card

                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                              Table 1812Component list for battery charger card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                              Total 18900

                                              1814Component list for controller card

                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                              Table 1813Component list for relay card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                              total 27000

                                              1815 Miscellaneous material

                                              Material Quantity Rate

                                              electronic item

                                              Transformer

                                              TXR1 0-9-15 1 20000

                                              0-9 1A

                                              0-15 100mA

                                              TXR2 0-9 1 16500

                                              0-9 1A

                                              Proximity switch 1 20000

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                              Table 1814Component list for microcontroller card

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Red push bottom 4 4000

                                              Green push button 1 1000

                                              Red led 5mm 4 800

                                              Green led 5mm 4 800

                                              Led holder 8 1600

                                              Copper clad 2 4000

                                              3 core cable 1 meter 1500

                                              3 pin plug 1 3000

                                              2 pin relimate wire 19 9000

                                              3 pin relimate wire 5 3750

                                              4 pin relimate wire 2 2000

                                              mechanical items

                                              Enclosure 1 25000

                                              Acrylic sheet 2 X 1 30000

                                              12mm cable gland 1 1000

                                              Screw 3mm 33 2000

                                              Screw 35mm 6 2400

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              10 mm spacers 100 1500

                                              10mm insert to stud 50 10000

                                              cable tie 2500

                                              Total 162350

                                              CHAPTER 19

                                              APPENDIX

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                              Table 1815Component list for miscellaneous material

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              APPENDIX

                                              191 APPENDIX

                                              1911 78xx IC datasheet

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                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1912 W10 datasheet

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1913 4n33 IC datasheet

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                              1914 MAX 232

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                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1915 ULN2003a IC datasheet

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              1916 89V51RD2 IC datasheet

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 20

                                              CONCLUSION

                                              CONCLUSION

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                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              201 CONCLUSION

                                              The coin-operated mobile phone charger is already successfully installed in

                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                              installed in any business premises

                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                              from airports to pubs from universities to health clubs virtually any location where there is

                                              a high footfall creating a large number of potential users

                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                              extend low mobile phone talk time provide battery charging

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 21

                                              IMAGES OF THE

                                              PROJECT

                                              Images of the project

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              211 IMAGES OF THE PROJECT

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                              fig211 lsquoCoin operated mobile battery charger

                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Fig 216 Relay driver circuit

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                              Fig 213 Constant voltage battery charger circuit

                                              Fig214 Power supply circuit

                                              Fig215 Metal detector proximity switch

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Fig217 Microcontroller circuit

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              Fig228 coin operated mobile battery charger project presentation

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              CHAPTER 22

                                              BIBILOGRAPHY

                                              BIBLIOGRAPHY

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                              221 BIBLIOGRAPHY

                                              BOOKS

                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                              INTERNET LINKS

                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                              • CHAPTER 1

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 6

                                                LIST OF THE

                                                COMPONENTS

                                                List of the components

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 24

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                61 LIST OF THE COMPONETS

                                                RESISTORS

                                                CAPACITORS

                                                LIGHT EMITING DIODES (LEDS)- Green Red

                                                RELAYrsquoS-

                                                TRANSFORMERS

                                                RECTIFIER BRIDGES (W 10)

                                                OSCILLATOR

                                                SWITCHES- Push switches

                                                DARLINGTON PAIR IC (ULN2003a)

                                                SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                                SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                OPTOCOUPLER IC (4N33)

                                                MICROCONTROLLER IC (89V51 RD2)

                                                RELIMATE CONNECTOR- 2 pin amp 4 pin

                                                RS-232 PORT CONNECTOR

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 7

                                                INTRODUCTION

                                                OF COMPONENTS

                                                Working of components

                                                Features or Uses of components

                                                Testing of components

                                                71 RESISTOR

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                711 WORKING

                                                Resistors limit current Resistors are considered to be the most used and the most

                                                important component of all the electronic circuits Resistors resist the flow of electrical

                                                current The higher the value of resistance (measured in ohms)

                                                the lower the current will be

                                                712 TESTING

                                                Read the indicated color code value then select the OHM-scale within but not way

                                                below the indicated value A resistor is good if its resistance is close to the indicated

                                                Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                                all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                                ohmmeter scale settings resistor is shorted

                                                713 SPECIFICATIONS

                                                To completely specify a resistors characteristics requires knowledge of the following

                                                parameters-

                                                bull Value

                                                bull Tolerance

                                                bull Temperature Coefficient

                                                bull Power Rating

                                                The specification of a resistor may be marked on its surface using either of two

                                                systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                                the second more recent system uses a combination of alpha-numeric characters

                                                7 2 CAPACITOR

                                                721 WORKING

                                                When DC voltage is applied to the capacitor an electric charge is stored on each

                                                electrode While the capacitor is charging up current flows The current will stop flowing

                                                when the capacitor has fully charged Capacitors find use

                                                in circuits for a variety of purposes They are used in

                                                time delay generation RC circuits In power supplies for filtering and power supply

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                decoupling as blocking capacitors for power factor correction and motor starting in LC

                                                tank circuits and so on

                                                722 TESTING

                                                To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                                negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                                A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                                and moves back again to infinite resistance position A defective indication for an

                                                electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                                which is an indication that the capacitor is shorted

                                                73 LIGHT EMITING DIODE (LED)

                                                731 WORKING

                                                LEDs are special diodes that emit light when

                                                connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                                indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                                the heart of an LED the semi-conductor chip

                                                In our project Green LED are used here for mainly two purpose

                                                a Charging ON indication (when ON)

                                                b Channel fault indication (always OFF)

                                                732 TESTING

                                                The good and working LED will then light up or glow a busted LED will not LEDs

                                                must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                                1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                                directly connected to a battery or power supply It will be destroyed the LED

                                                733 FEATURES

                                                Single color

                                                High bright output

                                                Low power consumption

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                High reliability and long life

                                                734 Descriptions

                                                Dice material GaInN

                                                Emitting Color Super Bright White

                                                Device Outlineφ5mm Round Type

                                                Lens Type Water Clear

                                                74 RELAY

                                                741 WORKING

                                                A relay is an electrically operated switch Current

                                                flowing through the coil of the relay creates a magnetic field

                                                which attracts a lever and changes the switch contacts The coil

                                                current can be on or off so relays have two switch positions and

                                                most have double throw (changeover) switch contacts

                                                Relays are like remote control switches and are used in

                                                many applications because of their relative simplicity long life

                                                and proven high reliability

                                                742 USES

                                                The main operation of a relay comes in places where only a low-power signal can be

                                                used to control a circuit

                                                It is also used in places where only one signal can be used to control a lot of circuits

                                                The application of relays started during the invention of telephones They played an

                                                important role in switching calls in telephone exchanges They were also used in

                                                long distance telegraphy They were used to switch the signal coming from one

                                                source to another destination

                                                743 TESTING

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                A relay will usually have a coil pole terminal and a set of

                                                contacts The set of contacts that are open when the relay is not

                                                energized are called normally open (NO) contacts and the set of

                                                contacts that are closed when the relay is not energized are called

                                                normally closed (NC) contacts The following steps can be used to perform the testing of

                                                the relay using a multimeter

                                                Keep the multimeter in the continuity check mode

                                                Check for continuity between the NC contacts and pole

                                                Check for discontinuity between NO contacts and the pole

                                                Now energies the relay using the rated voltage For example use a 9V battery for

                                                energizing a 9V relay The relay will engage with clicking sound

                                                Now check for continuity between NO contacts and pole

                                                Also check for discontinuity between NC contacts and pole

                                                As a final test measure the resistance of the relay coil using a multimeter and check

                                                whether it is matching to the value stated by the manufacturer

                                                If all the above tests are positive we can conclude that the relay is healthy

                                                75 TRANSFORMER

                                                751 WORKING

                                                A transformer is a device that transfers electrical energy

                                                from one circuit to another through inductively coupled

                                                electrical conductors A changing current in the first circuit (the

                                                primary) creates a changing magnetic field

                                                This changing magnetic field induces a changing voltage in the second circuit (the

                                                secondary) This effect is called mutual induction

                                                If a load is connected to the secondary circuit electric charge will flow in the

                                                secondary winding of the transformer and transfer energy from the primary circuit to the

                                                load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                number of primary turns

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                By appropriate selection of the numbers of turns a transformer thus allows an

                                                alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                making it less

                                                752 TESTING

                                                1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                scale and then adjusting the knob to verify its reading is an easy step to the

                                                reading of the ohm

                                                2 To check the resistance of the coil unplug or unsolder the leads of the

                                                transformer from its circuit and measure the resistance of each coil

                                                3 The next step is to test each coil for shorts to other coils

                                                76 RECTIFIER BRIDGE (W 10)

                                                761 WORKING

                                                A diode bridge rectifier is a device for converting AC or

                                                alternating current electricity into DC or direct current AC

                                                electricity goes from positive to negative constantly whereas DC

                                                always flows in the same direction

                                                AC electricity is more efficient to transmit and easier to

                                                convert into different voltages However most appliances need DC current to run A diode

                                                bridge rectifier is the most common type of power supply used to provide this current In

                                                our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                77 OSCILLATOR

                                                771 Working

                                                An oscillator puts out an endless series of pulses The output

                                                constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                all digital circuits have some type of oscillator This stream of output pulses is often

                                                called a clock One of the most important features of any oscillator is its frequency stability

                                                or in other words its ability to provide a constant frequency output under varying load

                                                conditions Some of the factors that affect the frequency stability of an oscillator include

                                                temperature variations in the load and changes in the DC power supply Frequency stability

                                                of the output signal can be improved by the proper selection of the components used for the

                                                resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                be obtained from normal LC and RC tank circuits

                                                In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                divided to give you exact clock rates for most of the common baud rates for the UART

                                                especially for the higher speeds (9600 19200) These crystals are readily available and

                                                commonly used

                                                78 SWITCH

                                                781 WORKING

                                                The most familiar form of switch is a manually operated

                                                electromechanical device with one or more sets of electrical contacts

                                                Each set of contacts can be in one of two states either closed meaning

                                                the contacts are touching and electricity can flow between them or

                                                open meaning the contacts are separated and the switch is non

                                                conducting The mechanism actuating the transition between these two

                                                states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                momentary (push-for on or push-for off) type

                                                782 USES

                                                In electronics a switch is an electrical component that can break an electrical

                                                circuit interrupting the current or diverting it from one conductor to another

                                                783 TESTING

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                no connection Switch can tested by using multimeter in continuity range

                                                79 DARLINGTON PAIR IC (ULN2003a)

                                                791 WORKING

                                                The Darlington transistor (often called a Darlington pair) is a

                                                compound structure consisting of two bipolar transistors (either

                                                integrated or separated devices) connected in such a way that the

                                                current amplified by the first transistor is amplified further by the

                                                second one This configuration gives a much higher current gain than

                                                each transistor taken separately and in the case of integrated devices

                                                can take less space than two individual transistors because they can

                                                use a shared collector

                                                Integrated Darlington pairs come packaged singly in

                                                transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                The Darlington transistor array used is ULN2003 Applications include relay

                                                drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                792 FEATURES

                                                The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                with common-cathode clamp diodes for switching inductive loads The collector-current

                                                rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                higher current capability

                                                710 SERIES VOLTAGE REGULATER IC (78XX)

                                                7101 WORKING

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Voltage Regulator (regulator) usually having three legs converts varying input

                                                voltage and produces a constant regulated output voltage They are available in a variety of

                                                outputs

                                                The most common part numbers start with the numbers 78 or 79 and finish with two

                                                digits indicating the output voltage The number 78 represents positive voltage and 79

                                                negative one The 78XX series of voltage regulators are designed for positive input

                                                The LM78XX series typically has the ability to drive current up to 1A For

                                                application requirements up to 150mA 78LXX can be used As mentioned above the

                                                component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                an output leg with the regulators voltage

                                                As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                difference between the input and output appears as heat If the input voltage is unnecessarily

                                                high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                sinking the regulator will shut down

                                                711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                7111 WORKING

                                                The MAX-232 It includes a Charge Pump which generates

                                                +10V and -10V from a single 5v supply

                                                This IC also includes two receivers and two transmitters in

                                                the same package This is handy in many cases when we only want to

                                                use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                receive line and one for the transmit There are also many variations of these devices The

                                                large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                available which use smaller capacitors and even some with inbuilt capacitors However the

                                                MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                Dual Charge-Pump Voltage Converter

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                output

                                                712 OPTOCOUPLER IC (4N33)

                                                7121 WORKING

                                                In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                between elements of a circuit typically a transmitter and a receiver while keeping them

                                                electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                back to an electrical signal electrical contact along the path is broken

                                                Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                light-triggered diac The two are separated by a transparent barrier which blocks any

                                                electrical current flow between the two but does allow the passage of light

                                                The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                of isolation between driving and load circuits These Optocouplers can be used to replace

                                                reed and mercury relays with advantages of long life high speed switching and elimination

                                                of magnetic field

                                                713 MICROCONTROLLER IC (89V51 RD 2 )

                                                713 WORKING

                                                The P89V51RD2 is an 80C51 microcontroller with 64

                                                kB Flash and 1024 bytes of data RAM

                                                A key feature of the P89V51RD2 is its X2 mode option

                                                The design engineer can choose to run the application with the conventional 80C51 clock

                                                rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                feature is to keep the same performance by reducing the clock frequency by half thus

                                                dramatically reducing the EMI

                                                The Flash program memory supports both parallel programming and in serial In-

                                                System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                speed reducing programming costs and time to market ISP allows a device to be

                                                reprogrammed in the end product under software control The capability to fieldupdate the

                                                application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                In-Application Programmable (IAP) allowing the Flash program memory to be

                                                reconfigured even while the application is running

                                                714 RELIMATE CONNECTOR

                                                7141 WORKING

                                                These are wire to board type connectors used to facilitate

                                                proper and firm electrical connection between the relay card and

                                                microcontroller card

                                                The connector has following specifications

                                                No of Ways 2-20

                                                Voltage Rating 250V AC DC

                                                Current Rating 3A AC DC

                                                Contact Resistance 20mW max

                                                Insulation Resistance 1000MW min

                                                Dielectric Withstanding 1000V ACminute

                                                Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                conflicts

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                715 RS-232 PORT CONNECTOR

                                                7151 WORKING

                                                Almost all digital devices which we use require either TTL

                                                or CMOS logic levels Therefore the first step to connecting a

                                                device to the RS-232 port is to transform the RS-232 levels back

                                                into 0 and 5 Volts This is done by RS-232 Level Converters

                                                Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                problem in many instances where only a single supply of +5V is present

                                                CHAPTER 8

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                IMPLIMENTATION

                                                OF THE PCB

                                                Components layout designing

                                                Developing or Etching the PCB

                                                Other operations like Drilling Cutting Tinning

                                                81 IMPLIMENTATION OF THE PCB

                                                A proper PCB ensure that various circuit components are interconnected as per the

                                                circuit diagram once they have been placed on the PCB in their proper positions and

                                                subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                base material to which is permanently attached a flat metallic network of conducting path

                                                whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                for this project is single one

                                                The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                board configuration however is most widely used and it may be of the nature of the single

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                which ensures adequate and permanent low resistance coupling

                                                811 BOARD DESIGN

                                                PCB designed is the most important and requires great care during work In this case

                                                great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                is designed it is virtually impossible to alter it While designing a circuit designer should

                                                take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                also help to solve this problem when circuit is complicated

                                                812 THE MASTER DIAGRAM

                                                The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                which is commonly made twice as the finished circuit since this makes the working on that

                                                much easier especially when circuit is complicated photography eventually reduces the

                                                size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                the designing -

                                                a The space between the conductors must be strictly controlled to avoid the possibility

                                                of electrical discharges or unwanted capacitance The amount by which the mater

                                                diagram is to reduce in size is thus a critical deign feature

                                                b The conductor must be wider in those part of the circuits that are going to handle

                                                large current must be handle without undue temperature of conductors

                                                c The minimum width of copper should not generally be less than about 15mmThis

                                                is related to mechanical strength rather than electrical properties and it also ensure

                                                that strips remains securely bounded to the base material

                                                d The points where the component holes for component lead wire occurs must be sited

                                                to suit the dimensions of the component and dimensions between lead-out wire so

                                                that the components can be situated correctly on finished board The conductor is

                                                also main large at the point of holes

                                                813 PCB MAKING

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                When the mater diagram probable twice the size of real PCB has been evolved the

                                                test major step consists of etching or dissolving the unwanted metal from copper claded

                                                board to create a circuit as depicted by master diagram It must be stressed that very

                                                accurate checking master is essential at this stage Then the master point is mounted on a

                                                special frame on easy facing of a larger camera and with the aid of the very powerful

                                                illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                brought into operation This comprises the camera body mounted so that sideways after

                                                each exposure In this way number of copies of the original master diagram is set out

                                                exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                In case of simple and need of number of less PCB economic and advisable to use the

                                                following lab method of PCB making

                                                Planning The Circuit

                                                It is not a particular difficult There are several important factors that need not be

                                                taken into account if the finished device is to work properly we must consider gain factor

                                                and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                possibility We must also ensure that conductors and components carrying high frequency

                                                current are well separated from the part of the circuit We are also to make sure that all

                                                components need to return to earth are properly connected and that possibility of common

                                                impedance arising earth returned

                                                Circuit is totally eliminated by making all earth as substantial possible consistent

                                                with nature of design Other factors that have to successfully studied include availability of

                                                adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                made for mechanical fixing ventilation effect of vibration

                                                Cleaning The Board

                                                The copper side of the board must be thoroughly cleaned before circuit plan is

                                                transferred to it This is important because even slightest trace of graze (from figure of

                                                instance) will impure the etching process and when the circuit plan has been neatly

                                                transferred to copper in this manner the board is held under running tap and the allowed to

                                                dry before resist is applied

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Transforming the Plan

                                                Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                board and working plan and carefully trace the lines of original plan with a ball pen

                                                Resist

                                                Resist is nothing more than a substrate that is unaffected by presence etching

                                                chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                covered when resists the leaguer type of paints possess good resist properties but

                                                disadvantage of relatively long time taken for drying It is essential to resist through

                                                hardening before etching is started Nail polished are better as they quickly and are less

                                                difficult to remove

                                                To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                short circulating due to paints are completely the avoid etching tapes and pads are available

                                                in different sizes

                                                Correcting Error

                                                When a result has been thoroughly hardened any errors that have been made can

                                                usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                edges of copper conductors on board the resist must be applied with steady band

                                                Etching

                                                Next comes etching of unwanted copper amp whether a small single is all that is

                                                required as quantity of board to be produce certain precautions must be taken before

                                                operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                grams of water

                                                Agitation

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                temperature and thickness of copper foil

                                                Finishing Off

                                                When all unwanted copper is dissolved from areas between conductor board should

                                                be taken from an etchant amp washed in water The resist must be removed using proper

                                                solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                This process is called Tinning This process of coating involve track with soldier

                                                Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                Assembling On PCB

                                                After the holes are drilled the component have to be assembled on PCB before

                                                assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                repetitive use cleans soldering iron

                                                CHAPTER 9

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                SOLDERING

                                                TECHNIQUE

                                                Technique for good soldering

                                                91 SOLDERING TECHNIQUE

                                                For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                oxide film or dirt on it If required flux is applied on the points to be soldered

                                                Now the joint to be soldered is heated with the help of soldering iron Heat

                                                applied should be such that when solder wire is touched to joint it must melt

                                                quickly

                                                The joint and the soldering iron is held such that molten solder should flow

                                                smoothly over the joint

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                When joint is completely covered with molten solder the soldering iron is re-

                                                moved

                                                The joint is allowed to cool without any movement

                                                The bright shining solder indicates good soldering

                                                In case of dry solder joint a air gap remains in between the solder material and

                                                the joint It means that soldering is improper This is removed and again solder-

                                                ing is done

                                                Thus this way all the components are soldered on P C B

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 10

                                                PCB LAYOUTS

                                                Schematic diagram

                                                Bottom and top layout

                                                101 POWER SUPPLY CARD

                                                1011 SCHIMETIC DIAGRAM

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1012 LEGEND MARKING

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                Fig1011 Schematic diagram of power supply card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1013TOP LAYER

                                                1014 BOTTOM LAYER

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                Fig1013 Top layer of power supply

                                                card

                                                Fig1014 Schematic diagram of power supply card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                102 BATTERY CHARGER CARD

                                                1021 SCHEMATIC DIAGRAM

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                Fig1021 Schematic diagram of battery charger card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                103 RELAY CARD

                                                1031 SCHIMETIC DIAGRAM

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                Fig1031 Schematic diagram of Relay card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1032 RELAY CARD LEGEND MARKING

                                                1033 TOP LAYER

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                Fig1032 Legend marking of Relay card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1034 BOTTOM LAYER

                                                104 MICROCONTROLER CARD

                                                1041 SCHIMETIC DIAGRAM

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                Fig1034 Bottom layer of Relay card

                                                Fig1041 Schematic diagram of microcontroller card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1042 ALL LAYERS

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                Fig1042 All layer of microcontroller card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 11

                                                INTRODUCTION

                                                OF SOFTWARE

                                                Keil (microVision 2)

                                                Eagle (Easily Applicable Graphical Layout Editor)

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                111 Keil (microVision 2)

                                                1111 Introduction to C51 Cross Compiler

                                                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                generates object code that matches the efficiency and speed of assembly programming

                                                Using a high-level language like C has many advantages over assembly language

                                                programming

                                                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                the memory structure of the 8051 CPU is desirable (but not necessary)

                                                Details like register allocation and addressing of the various memory types and data

                                                types is managed by the compiler

                                                Programs get a formal structure (which is imposed by the C programming language) and

                                                can be divided into separate functions This contributes to source code reusability as

                                                well as better overall application structure

                                                The ability to combine variable selection with specific operations improves program

                                                readability

                                                Keywords and operational functions that more nearly resemble the human thought

                                                process may be used

                                                Programming and program test time is drastically reduced

                                                The C run-time library contains many standard routines such as formatted output

                                                numeric conversions and floating-point arithmetic

                                                Existing program parts can be more easily included into new programs because of

                                                modular program construction techniques

                                                The language C is a very portable language (based on the ANSI standard) that enjoys

                                                wide popular support and is easily obtained for most systems Existing program

                                                investments can be quickly adapted to other processors as needed

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1112 Software Development Cycle in Keil

                                                When we use the Keil Software tools the

                                                project development cycle is roughly the same as

                                                it is for any other software development project

                                                1 Create a project select the target chip from the

                                                device database and configure the tool settings

                                                2 Create source files in C or assembly

                                                3 Build your application with the project

                                                manager

                                                4 Correct errors in source files

                                                5 Test the linked application A block diagram of

                                                the complete 8051 tool set may best illustrate the

                                                development cycle

                                                112 Eagle (Easily Applicable Graphical Layout Editor)

                                                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                1121 Schematic Editor

                                                In this one can develop amp design circuits for the required PCB

                                                1122 Layout Editor

                                                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                Fig 111 Software development in KEIL

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1123 Library Editor

                                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                1124 Auto Router

                                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                the PCB tracks designed

                                                1125 Cam Processor

                                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                                Bottom Layer Component Layer Masking Layer etc

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                Start

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 12

                                                INTRODUCTION

                                                OF

                                                PROGRAMMING

                                                Flowchart of programming

                                                Program code

                                                121 Flowchart

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                2

                                                flag9==1

                                                flag9=1

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                flag11==1

                                                flag11=1 flag11=0 flag4=0

                                                REady_LED4=0

                                                Sw2_op (P01) ==0

                                                My delay (10)

                                                3 3

                                                flag2=1 disp2=1 k2=0

                                                3

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                4

                                                flag11==1

                                                flag11=0 flag4=0 REady_LED4=0

                                                flag11=1

                                                My delay (10)

                                                flag3=1 disp3=1 k3=0

                                                k1==0||k2==0||k4==0

                                                Sw3_op (P02) ==0

                                                5

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                flag5==1

                                                5

                                                flag11==1

                                                flag7=1

                                                flag7==1

                                                flag7=0 flag2=0 REady_LED2=0

                                                6

                                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                flag11=0 flag4=0 REady_LED4=0

                                                flag11=1

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                6

                                                My delay (10)

                                                flag4=1 disp4=1 k4=0

                                                k1==0||k2==0||k3==0 flag5==1

                                                7

                                                Sw4_op (P03) ==0

                                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                7

                                                flag7==1

                                                flag9==1

                                                flag7=1

                                                flag7=0 flag2=0 REady_LED2=0

                                                flag9=0 flag3=0 REady_LED3=0

                                                flag9=1

                                                Sw5_op A(P04) ==0

                                                My delay (10)

                                                8

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                9

                                                flag2==1

                                                flag3==1

                                                8

                                                flag1==1

                                                flag4==1 flag5=1 disp5=1

                                                flag9=1 disp5=1

                                                flag7=1 disp5=1

                                                flag11=1 disp5=1

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                Sw6_op (P05) ==0

                                                My delay (10)

                                                flag2==1 ampamp flag7==1

                                                flag3==1 ampamp flag9==1 9

                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                flag8=1 disp6=1

                                                10

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                10

                                                flag4==1 ampamp flag11==1

                                                flag10=1 disp6=1

                                                flag12=1 disp6=1

                                                flag8==1

                                                flag10==1

                                                11

                                                flag6==1

                                                i++

                                                l++

                                                j++

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                flag12==1

                                                M++

                                                11

                                                Stop

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                122 Program

                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                define buzzerP2_0 buzzer indication

                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                sbit sw5_op=P0^4 input switch5 for coin

                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                output Led for indication

                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                function prototype declaration

                                                void my_delay(unsigned int value) DELAY FUCTION

                                                void init_timer() timer 0 initialization function

                                                variable declaration

                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                start of main programme

                                                void main()

                                                init_timer() call it timer initialization function

                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                start of while loop

                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                condition for switch1

                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                if(iltk) loop will repeat for desired time of charging

                                                if(igt=1000)

                                                buzzer=1 turn on buzzer if (ii==20)

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                REady_LED1=1 turn on ready indication of led1

                                                else if(ii==40)

                                                REady_LED1=0ii=0

                                                elseREady_LED1=0

                                                START_LED1=1

                                                else

                                                START_LED1=0

                                                k1=1 buzzer=0

                                                REady_LED1=0 flag1=0

                                                flag5=0flag6=0

                                                condition for switch2

                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                REady_LED2=1 turn on ready 2 led indication

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                disp2=0

                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                if(jltk)

                                                if(jgt1000) buzzer=1 if(jj==20)

                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                elseREady_LED2=0

                                                START_LED2=1

                                                else START_LED2=0

                                                REady_LED2=0 k2=1 buzzer=0

                                                flag2=0flag7=0flag8=0

                                                j=0jj=0

                                                condition for switch 3

                                                if(flag3==1) check swich3 pressed

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                if(disp3==1 )

                                                REady_LED3=1 disp3=0

                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                if(lltk)

                                                if(lgt1000) buzzer=1 if(ll==20)

                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                elseREady_LED3=0

                                                START_LED3=1

                                                else START_LED3=0

                                                LED2=0 k3=1 buzzer=0

                                                REady_LED3=0 flag3=0

                                                flag9=0flag10=0

                                                l=0ll=0

                                                condition for switch 4

                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                REady_LED4=1 disp4=0

                                                if(flag11==1) check coin is pressed

                                                if(flag12==1) START is pressed

                                                if(mltk)

                                                if(mgt1000)

                                                buzzer=1 if(mm==20)

                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                elseREady_LED4=0

                                                START_LED4=1

                                                else START_LED4=0

                                                buzzer=0 k4=1

                                                REady_LED4=0 flag4=0

                                                flag11=0flag12=0

                                                m=0mm=0

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                while(1)

                                                end of main programme

                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                whenever specific time the interrupt will generate control will go in following function

                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if(sw1_op==0 ) ready switch flag for system1

                                                my_delay(10) CALL DELAY FUNCTION

                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                if(flag7==1) SET THE FLAG

                                                flag7=1

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                flag9=1

                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                flag11=1

                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if(sw2_op==0 ) fready switch flag for system2

                                                my_delay (10)

                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                if(flag5==1)

                                                flag5=1

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                flag9=1

                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                flag11=1

                                                elseflag11=0flag4=0REady_LED4=0

                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                if(flag7==1)

                                                flag7=1

                                                else

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                flag5=1

                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                flag11=1

                                                elseflag11=0flag4=0REady_LED4=0

                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                if(flag7==1)

                                                flag7=1

                                                elseflag7=0

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                flag2=0REady_LED2=0 if(flag5==1)

                                                flag5=1

                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                flag9=1

                                                elseflag9=0flag3=0REady_LED3=0

                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                if(flag6==1)

                                                i++ if (igt1000) ii++

                                                if (flag8==1)

                                                j++ if(jgt1000) jj++

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                if (flag10==1)

                                                l++ if (lgt1000) ll++

                                                if (flag12==1)

                                                m++ if (mgt1000) mm++

                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 13

                                                TROUBLE SHOOT

                                                Troubleshoot

                                                131 TROUBLE SHOOT

                                                A newly assembled circuit does not work may be due to -

                                                Faulty components

                                                Improper soldering

                                                Wrong connections

                                                Also any stop in working after some period may be due to -

                                                Component failure

                                                Supply failure

                                                Damaging of PCB

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Fault finding is very essential if you want the circuit to operate properly

                                                If a newly assembled circuit is not working properly check all the components and

                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                proper soldering

                                                If faults are not observed during physical observations one should proceed for Hot

                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                Resistance measurement is also done which is known as Dry test

                                                During this project work some green LEDs was not glow then we checked it

                                                continuity and replace it

                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                heated after starting the project It happens because of some soldering points are shorted

                                                during soldering PCB We solved that problem

                                                CHAPTER 14

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                ADVANTAGES OF

                                                THE PROJECT

                                                Advantages

                                                141 ADVANTAGES OF THE PROJECT

                                                Simple and hand efficient Microcontroller based system

                                                Fast charging capacity

                                                Simple to operate

                                                Ease of mobility

                                                Facilitates connectivity for 90 of cellular phones

                                                Less expensive

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Reduced man power

                                                Low power consumption

                                                It can offer emergency charging for 4sets of handsets synchronously

                                                CHAPTER 15

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                DISADVANTAGES

                                                OF THE PROJECT

                                                Disadvantages

                                                151 DISADVANTAGES OF THE PROJECT

                                                It requires mains supply to work project

                                                Due to limited charging channels till now there may be a possibility that

                                                mobile phones of few brands cannot be connected for charging For this

                                                purpose we have to use separate connectors for that specific brand differently

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                min

                                                It does not have battery backup therefore it cannot be portable

                                                CHAPTER 16

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                APPLICATIONS OF

                                                THE PROJECT

                                                Application

                                                161 APPLICATIONS OF THE PROJECT

                                                The coin based mobile phone charger is very useful to public for using coin to

                                                charge for the mobile phone in any places

                                                It is used for emergency charging purposes

                                                It can be installed in malls railway stations bus stops and other public

                                                places

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                The charger offers a unique revenue opportunity for a vast range of

                                                businesses - from airports to pubs from universities to health clubs virtually

                                                any location where there is a high footfall creating a large number of

                                                potential users

                                                It can be installed in offices and collages for pay charging facility

                                                CHAPTER 17

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                FUTURE

                                                DEVELOPMENT OF

                                                THE PROJECT

                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                This project is very useful to people who are using mobile phone without charging

                                                condition in public places

                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                It will provide battery backup for make it portable

                                                It will also provide SMS system in future

                                                We can also increase the charging time by editing software of the project

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 18

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                COST ANALYSIS

                                                OF THE PROJECT

                                                COST ANALYSIS OF THE PROJECT

                                                181 COST ANALYSIS OF THE PROJECT

                                                1811 Component list for power supply card

                                                Footprint Quantity Designators Rate

                                                Resistor

                                                22K 1 R2 1

                                                1K 1 R1 1

                                                Capacitor

                                                1000uf25V 1 C5 10

                                                2200uf25V 1 C1 10

                                                022uf 2 C6 C2 1

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                Table 1811 Component list for power supply card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                01uf 2 C4 C3 1

                                                IC

                                                BRIDGE W10 2 BR2 BR1 10

                                                L7812CV (TO-220) 1 U2 8

                                                L7805CV (TO-220) 1 U1 8

                                                Connector

                                                CON PHO 2PIN 2 J3 J2 16

                                                CON PHO 3PIN 1 J1 12

                                                LED3mm red 2 L1 L2 15

                                                Heat sink (TO-220) 2 16

                                                Total 955

                                                1812 Component list for battery charger card

                                                Footprint Quantity Rate

                                                Capacitor

                                                2200uf25V 1 1000

                                                022uf 4 100

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                01uf 4 100

                                                IC

                                                BRIDGE W10 1 500

                                                L7805CV (TO-220) 4 3200

                                                Connector

                                                CON PHO 2PIN 1 800

                                                Relimate 2 pin 1 400

                                                relimate 3 pin 4 2000

                                                Heat sink (TO-220) 4 1200

                                                TOTAL 9300

                                                1813 Component list for Relay card

                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                Table 1812Component list for battery charger card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                Total 18900

                                                1814Component list for controller card

                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                Table 1813Component list for relay card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                total 27000

                                                1815 Miscellaneous material

                                                Material Quantity Rate

                                                electronic item

                                                Transformer

                                                TXR1 0-9-15 1 20000

                                                0-9 1A

                                                0-15 100mA

                                                TXR2 0-9 1 16500

                                                0-9 1A

                                                Proximity switch 1 20000

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                Table 1814Component list for microcontroller card

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Red push bottom 4 4000

                                                Green push button 1 1000

                                                Red led 5mm 4 800

                                                Green led 5mm 4 800

                                                Led holder 8 1600

                                                Copper clad 2 4000

                                                3 core cable 1 meter 1500

                                                3 pin plug 1 3000

                                                2 pin relimate wire 19 9000

                                                3 pin relimate wire 5 3750

                                                4 pin relimate wire 2 2000

                                                mechanical items

                                                Enclosure 1 25000

                                                Acrylic sheet 2 X 1 30000

                                                12mm cable gland 1 1000

                                                Screw 3mm 33 2000

                                                Screw 35mm 6 2400

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                10 mm spacers 100 1500

                                                10mm insert to stud 50 10000

                                                cable tie 2500

                                                Total 162350

                                                CHAPTER 19

                                                APPENDIX

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                Table 1815Component list for miscellaneous material

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                APPENDIX

                                                191 APPENDIX

                                                1911 78xx IC datasheet

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1912 W10 datasheet

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1913 4n33 IC datasheet

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                1914 MAX 232

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1915 ULN2003a IC datasheet

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                1916 89V51RD2 IC datasheet

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 20

                                                CONCLUSION

                                                CONCLUSION

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                201 CONCLUSION

                                                The coin-operated mobile phone charger is already successfully installed in

                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                installed in any business premises

                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                a high footfall creating a large number of potential users

                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                extend low mobile phone talk time provide battery charging

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 21

                                                IMAGES OF THE

                                                PROJECT

                                                Images of the project

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                211 IMAGES OF THE PROJECT

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                fig211 lsquoCoin operated mobile battery charger

                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Fig 216 Relay driver circuit

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                Fig 213 Constant voltage battery charger circuit

                                                Fig214 Power supply circuit

                                                Fig215 Metal detector proximity switch

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Fig217 Microcontroller circuit

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                Fig228 coin operated mobile battery charger project presentation

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                CHAPTER 22

                                                BIBILOGRAPHY

                                                BIBLIOGRAPHY

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                221 BIBLIOGRAPHY

                                                BOOKS

                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                INTERNET LINKS

                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                • CHAPTER 1

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  61 LIST OF THE COMPONETS

                                                  RESISTORS

                                                  CAPACITORS

                                                  LIGHT EMITING DIODES (LEDS)- Green Red

                                                  RELAYrsquoS-

                                                  TRANSFORMERS

                                                  RECTIFIER BRIDGES (W 10)

                                                  OSCILLATOR

                                                  SWITCHES- Push switches

                                                  DARLINGTON PAIR IC (ULN2003a)

                                                  SERIES VOLTAGE REGULATER IC (78XX)-7805 amp 7812

                                                  SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                  OPTOCOUPLER IC (4N33)

                                                  MICROCONTROLLER IC (89V51 RD2)

                                                  RELIMATE CONNECTOR- 2 pin amp 4 pin

                                                  RS-232 PORT CONNECTOR

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 25

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 7

                                                  INTRODUCTION

                                                  OF COMPONENTS

                                                  Working of components

                                                  Features or Uses of components

                                                  Testing of components

                                                  71 RESISTOR

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  711 WORKING

                                                  Resistors limit current Resistors are considered to be the most used and the most

                                                  important component of all the electronic circuits Resistors resist the flow of electrical

                                                  current The higher the value of resistance (measured in ohms)

                                                  the lower the current will be

                                                  712 TESTING

                                                  Read the indicated color code value then select the OHM-scale within but not way

                                                  below the indicated value A resistor is good if its resistance is close to the indicated

                                                  Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                                  all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                                  ohmmeter scale settings resistor is shorted

                                                  713 SPECIFICATIONS

                                                  To completely specify a resistors characteristics requires knowledge of the following

                                                  parameters-

                                                  bull Value

                                                  bull Tolerance

                                                  bull Temperature Coefficient

                                                  bull Power Rating

                                                  The specification of a resistor may be marked on its surface using either of two

                                                  systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                                  the second more recent system uses a combination of alpha-numeric characters

                                                  7 2 CAPACITOR

                                                  721 WORKING

                                                  When DC voltage is applied to the capacitor an electric charge is stored on each

                                                  electrode While the capacitor is charging up current flows The current will stop flowing

                                                  when the capacitor has fully charged Capacitors find use

                                                  in circuits for a variety of purposes They are used in

                                                  time delay generation RC circuits In power supplies for filtering and power supply

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  decoupling as blocking capacitors for power factor correction and motor starting in LC

                                                  tank circuits and so on

                                                  722 TESTING

                                                  To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                                  negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                                  A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                                  and moves back again to infinite resistance position A defective indication for an

                                                  electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                                  which is an indication that the capacitor is shorted

                                                  73 LIGHT EMITING DIODE (LED)

                                                  731 WORKING

                                                  LEDs are special diodes that emit light when

                                                  connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                                  indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                                  the heart of an LED the semi-conductor chip

                                                  In our project Green LED are used here for mainly two purpose

                                                  a Charging ON indication (when ON)

                                                  b Channel fault indication (always OFF)

                                                  732 TESTING

                                                  The good and working LED will then light up or glow a busted LED will not LEDs

                                                  must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                                  1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                                  directly connected to a battery or power supply It will be destroyed the LED

                                                  733 FEATURES

                                                  Single color

                                                  High bright output

                                                  Low power consumption

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  High reliability and long life

                                                  734 Descriptions

                                                  Dice material GaInN

                                                  Emitting Color Super Bright White

                                                  Device Outlineφ5mm Round Type

                                                  Lens Type Water Clear

                                                  74 RELAY

                                                  741 WORKING

                                                  A relay is an electrically operated switch Current

                                                  flowing through the coil of the relay creates a magnetic field

                                                  which attracts a lever and changes the switch contacts The coil

                                                  current can be on or off so relays have two switch positions and

                                                  most have double throw (changeover) switch contacts

                                                  Relays are like remote control switches and are used in

                                                  many applications because of their relative simplicity long life

                                                  and proven high reliability

                                                  742 USES

                                                  The main operation of a relay comes in places where only a low-power signal can be

                                                  used to control a circuit

                                                  It is also used in places where only one signal can be used to control a lot of circuits

                                                  The application of relays started during the invention of telephones They played an

                                                  important role in switching calls in telephone exchanges They were also used in

                                                  long distance telegraphy They were used to switch the signal coming from one

                                                  source to another destination

                                                  743 TESTING

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  A relay will usually have a coil pole terminal and a set of

                                                  contacts The set of contacts that are open when the relay is not

                                                  energized are called normally open (NO) contacts and the set of

                                                  contacts that are closed when the relay is not energized are called

                                                  normally closed (NC) contacts The following steps can be used to perform the testing of

                                                  the relay using a multimeter

                                                  Keep the multimeter in the continuity check mode

                                                  Check for continuity between the NC contacts and pole

                                                  Check for discontinuity between NO contacts and the pole

                                                  Now energies the relay using the rated voltage For example use a 9V battery for

                                                  energizing a 9V relay The relay will engage with clicking sound

                                                  Now check for continuity between NO contacts and pole

                                                  Also check for discontinuity between NC contacts and pole

                                                  As a final test measure the resistance of the relay coil using a multimeter and check

                                                  whether it is matching to the value stated by the manufacturer

                                                  If all the above tests are positive we can conclude that the relay is healthy

                                                  75 TRANSFORMER

                                                  751 WORKING

                                                  A transformer is a device that transfers electrical energy

                                                  from one circuit to another through inductively coupled

                                                  electrical conductors A changing current in the first circuit (the

                                                  primary) creates a changing magnetic field

                                                  This changing magnetic field induces a changing voltage in the second circuit (the

                                                  secondary) This effect is called mutual induction

                                                  If a load is connected to the secondary circuit electric charge will flow in the

                                                  secondary winding of the transformer and transfer energy from the primary circuit to the

                                                  load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                  of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                  number of primary turns

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  By appropriate selection of the numbers of turns a transformer thus allows an

                                                  alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                  making it less

                                                  752 TESTING

                                                  1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                  scale and then adjusting the knob to verify its reading is an easy step to the

                                                  reading of the ohm

                                                  2 To check the resistance of the coil unplug or unsolder the leads of the

                                                  transformer from its circuit and measure the resistance of each coil

                                                  3 The next step is to test each coil for shorts to other coils

                                                  76 RECTIFIER BRIDGE (W 10)

                                                  761 WORKING

                                                  A diode bridge rectifier is a device for converting AC or

                                                  alternating current electricity into DC or direct current AC

                                                  electricity goes from positive to negative constantly whereas DC

                                                  always flows in the same direction

                                                  AC electricity is more efficient to transmit and easier to

                                                  convert into different voltages However most appliances need DC current to run A diode

                                                  bridge rectifier is the most common type of power supply used to provide this current In

                                                  our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                  77 OSCILLATOR

                                                  771 Working

                                                  An oscillator puts out an endless series of pulses The output

                                                  constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  all digital circuits have some type of oscillator This stream of output pulses is often

                                                  called a clock One of the most important features of any oscillator is its frequency stability

                                                  or in other words its ability to provide a constant frequency output under varying load

                                                  conditions Some of the factors that affect the frequency stability of an oscillator include

                                                  temperature variations in the load and changes in the DC power supply Frequency stability

                                                  of the output signal can be improved by the proper selection of the components used for the

                                                  resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                  be obtained from normal LC and RC tank circuits

                                                  In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                  divided to give you exact clock rates for most of the common baud rates for the UART

                                                  especially for the higher speeds (9600 19200) These crystals are readily available and

                                                  commonly used

                                                  78 SWITCH

                                                  781 WORKING

                                                  The most familiar form of switch is a manually operated

                                                  electromechanical device with one or more sets of electrical contacts

                                                  Each set of contacts can be in one of two states either closed meaning

                                                  the contacts are touching and electricity can flow between them or

                                                  open meaning the contacts are separated and the switch is non

                                                  conducting The mechanism actuating the transition between these two

                                                  states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                  momentary (push-for on or push-for off) type

                                                  782 USES

                                                  In electronics a switch is an electrical component that can break an electrical

                                                  circuit interrupting the current or diverting it from one conductor to another

                                                  783 TESTING

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                  no connection Switch can tested by using multimeter in continuity range

                                                  79 DARLINGTON PAIR IC (ULN2003a)

                                                  791 WORKING

                                                  The Darlington transistor (often called a Darlington pair) is a

                                                  compound structure consisting of two bipolar transistors (either

                                                  integrated or separated devices) connected in such a way that the

                                                  current amplified by the first transistor is amplified further by the

                                                  second one This configuration gives a much higher current gain than

                                                  each transistor taken separately and in the case of integrated devices

                                                  can take less space than two individual transistors because they can

                                                  use a shared collector

                                                  Integrated Darlington pairs come packaged singly in

                                                  transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                  The Darlington transistor array used is ULN2003 Applications include relay

                                                  drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                  drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                  to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                  for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                  792 FEATURES

                                                  The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                  transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                  with common-cathode clamp diodes for switching inductive loads The collector-current

                                                  rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                  higher current capability

                                                  710 SERIES VOLTAGE REGULATER IC (78XX)

                                                  7101 WORKING

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Voltage Regulator (regulator) usually having three legs converts varying input

                                                  voltage and produces a constant regulated output voltage They are available in a variety of

                                                  outputs

                                                  The most common part numbers start with the numbers 78 or 79 and finish with two

                                                  digits indicating the output voltage The number 78 represents positive voltage and 79

                                                  negative one The 78XX series of voltage regulators are designed for positive input

                                                  The LM78XX series typically has the ability to drive current up to 1A For

                                                  application requirements up to 150mA 78LXX can be used As mentioned above the

                                                  component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                  an output leg with the regulators voltage

                                                  As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                  voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                  difference between the input and output appears as heat If the input voltage is unnecessarily

                                                  high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                  sinking the regulator will shut down

                                                  711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                  7111 WORKING

                                                  The MAX-232 It includes a Charge Pump which generates

                                                  +10V and -10V from a single 5v supply

                                                  This IC also includes two receivers and two transmitters in

                                                  the same package This is handy in many cases when we only want to

                                                  use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                  receive line and one for the transmit There are also many variations of these devices The

                                                  large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                  available which use smaller capacitors and even some with inbuilt capacitors However the

                                                  MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                  Dual Charge-Pump Voltage Converter

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                  V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                  output

                                                  712 OPTOCOUPLER IC (4N33)

                                                  7121 WORKING

                                                  In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                  photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                  between elements of a circuit typically a transmitter and a receiver while keeping them

                                                  electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                  back to an electrical signal electrical contact along the path is broken

                                                  Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                  essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                  arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                  light-triggered diac The two are separated by a transparent barrier which blocks any

                                                  electrical current flow between the two but does allow the passage of light

                                                  The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                  silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                  of isolation between driving and load circuits These Optocouplers can be used to replace

                                                  reed and mercury relays with advantages of long life high speed switching and elimination

                                                  of magnetic field

                                                  713 MICROCONTROLLER IC (89V51 RD 2 )

                                                  713 WORKING

                                                  The P89V51RD2 is an 80C51 microcontroller with 64

                                                  kB Flash and 1024 bytes of data RAM

                                                  A key feature of the P89V51RD2 is its X2 mode option

                                                  The design engineer can choose to run the application with the conventional 80C51 clock

                                                  rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                  feature is to keep the same performance by reducing the clock frequency by half thus

                                                  dramatically reducing the EMI

                                                  The Flash program memory supports both parallel programming and in serial In-

                                                  System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                  speed reducing programming costs and time to market ISP allows a device to be

                                                  reprogrammed in the end product under software control The capability to fieldupdate the

                                                  application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                  In-Application Programmable (IAP) allowing the Flash program memory to be

                                                  reconfigured even while the application is running

                                                  714 RELIMATE CONNECTOR

                                                  7141 WORKING

                                                  These are wire to board type connectors used to facilitate

                                                  proper and firm electrical connection between the relay card and

                                                  microcontroller card

                                                  The connector has following specifications

                                                  No of Ways 2-20

                                                  Voltage Rating 250V AC DC

                                                  Current Rating 3A AC DC

                                                  Contact Resistance 20mW max

                                                  Insulation Resistance 1000MW min

                                                  Dielectric Withstanding 1000V ACminute

                                                  Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                  The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                  connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                  conflicts

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  715 RS-232 PORT CONNECTOR

                                                  7151 WORKING

                                                  Almost all digital devices which we use require either TTL

                                                  or CMOS logic levels Therefore the first step to connecting a

                                                  device to the RS-232 port is to transform the RS-232 levels back

                                                  into 0 and 5 Volts This is done by RS-232 Level Converters

                                                  Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                  Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                  The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                  problem in many instances where only a single supply of +5V is present

                                                  CHAPTER 8

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  IMPLIMENTATION

                                                  OF THE PCB

                                                  Components layout designing

                                                  Developing or Etching the PCB

                                                  Other operations like Drilling Cutting Tinning

                                                  81 IMPLIMENTATION OF THE PCB

                                                  A proper PCB ensure that various circuit components are interconnected as per the

                                                  circuit diagram once they have been placed on the PCB in their proper positions and

                                                  subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                  base material to which is permanently attached a flat metallic network of conducting path

                                                  whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                  for this project is single one

                                                  The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                  board configuration however is most widely used and it may be of the nature of the single

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                  which ensures adequate and permanent low resistance coupling

                                                  811 BOARD DESIGN

                                                  PCB designed is the most important and requires great care during work In this case

                                                  great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                  is designed it is virtually impossible to alter it While designing a circuit designer should

                                                  take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                  unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                  also help to solve this problem when circuit is complicated

                                                  812 THE MASTER DIAGRAM

                                                  The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                  which is commonly made twice as the finished circuit since this makes the working on that

                                                  much easier especially when circuit is complicated photography eventually reduces the

                                                  size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                  the designing -

                                                  a The space between the conductors must be strictly controlled to avoid the possibility

                                                  of electrical discharges or unwanted capacitance The amount by which the mater

                                                  diagram is to reduce in size is thus a critical deign feature

                                                  b The conductor must be wider in those part of the circuits that are going to handle

                                                  large current must be handle without undue temperature of conductors

                                                  c The minimum width of copper should not generally be less than about 15mmThis

                                                  is related to mechanical strength rather than electrical properties and it also ensure

                                                  that strips remains securely bounded to the base material

                                                  d The points where the component holes for component lead wire occurs must be sited

                                                  to suit the dimensions of the component and dimensions between lead-out wire so

                                                  that the components can be situated correctly on finished board The conductor is

                                                  also main large at the point of holes

                                                  813 PCB MAKING

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  When the mater diagram probable twice the size of real PCB has been evolved the

                                                  test major step consists of etching or dissolving the unwanted metal from copper claded

                                                  board to create a circuit as depicted by master diagram It must be stressed that very

                                                  accurate checking master is essential at this stage Then the master point is mounted on a

                                                  special frame on easy facing of a larger camera and with the aid of the very powerful

                                                  illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                  developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                  brought into operation This comprises the camera body mounted so that sideways after

                                                  each exposure In this way number of copies of the original master diagram is set out

                                                  exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                  In case of simple and need of number of less PCB economic and advisable to use the

                                                  following lab method of PCB making

                                                  Planning The Circuit

                                                  It is not a particular difficult There are several important factors that need not be

                                                  taken into account if the finished device is to work properly we must consider gain factor

                                                  and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                  possibility We must also ensure that conductors and components carrying high frequency

                                                  current are well separated from the part of the circuit We are also to make sure that all

                                                  components need to return to earth are properly connected and that possibility of common

                                                  impedance arising earth returned

                                                  Circuit is totally eliminated by making all earth as substantial possible consistent

                                                  with nature of design Other factors that have to successfully studied include availability of

                                                  adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                  made for mechanical fixing ventilation effect of vibration

                                                  Cleaning The Board

                                                  The copper side of the board must be thoroughly cleaned before circuit plan is

                                                  transferred to it This is important because even slightest trace of graze (from figure of

                                                  instance) will impure the etching process and when the circuit plan has been neatly

                                                  transferred to copper in this manner the board is held under running tap and the allowed to

                                                  dry before resist is applied

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Transforming the Plan

                                                  Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                  A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                  board and working plan and carefully trace the lines of original plan with a ball pen

                                                  Resist

                                                  Resist is nothing more than a substrate that is unaffected by presence etching

                                                  chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                  clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                  covered when resists the leaguer type of paints possess good resist properties but

                                                  disadvantage of relatively long time taken for drying It is essential to resist through

                                                  hardening before etching is started Nail polished are better as they quickly and are less

                                                  difficult to remove

                                                  To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                  PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                  short circulating due to paints are completely the avoid etching tapes and pads are available

                                                  in different sizes

                                                  Correcting Error

                                                  When a result has been thoroughly hardened any errors that have been made can

                                                  usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                  edges of copper conductors on board the resist must be applied with steady band

                                                  Etching

                                                  Next comes etching of unwanted copper amp whether a small single is all that is

                                                  required as quantity of board to be produce certain precautions must be taken before

                                                  operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                  quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                  etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                  grams of water

                                                  Agitation

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                  the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                  laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                  gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                  temperature and thickness of copper foil

                                                  Finishing Off

                                                  When all unwanted copper is dissolved from areas between conductor board should

                                                  be taken from an etchant amp washed in water The resist must be removed using proper

                                                  solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                  seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                  PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                  This process is called Tinning This process of coating involve track with soldier

                                                  Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                  ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                  Assembling On PCB

                                                  After the holes are drilled the component have to be assembled on PCB before

                                                  assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                  accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                  repetitive use cleans soldering iron

                                                  CHAPTER 9

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  SOLDERING

                                                  TECHNIQUE

                                                  Technique for good soldering

                                                  91 SOLDERING TECHNIQUE

                                                  For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                  oxide film or dirt on it If required flux is applied on the points to be soldered

                                                  Now the joint to be soldered is heated with the help of soldering iron Heat

                                                  applied should be such that when solder wire is touched to joint it must melt

                                                  quickly

                                                  The joint and the soldering iron is held such that molten solder should flow

                                                  smoothly over the joint

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  When joint is completely covered with molten solder the soldering iron is re-

                                                  moved

                                                  The joint is allowed to cool without any movement

                                                  The bright shining solder indicates good soldering

                                                  In case of dry solder joint a air gap remains in between the solder material and

                                                  the joint It means that soldering is improper This is removed and again solder-

                                                  ing is done

                                                  Thus this way all the components are soldered on P C B

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 10

                                                  PCB LAYOUTS

                                                  Schematic diagram

                                                  Bottom and top layout

                                                  101 POWER SUPPLY CARD

                                                  1011 SCHIMETIC DIAGRAM

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1012 LEGEND MARKING

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                  Fig1011 Schematic diagram of power supply card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1013TOP LAYER

                                                  1014 BOTTOM LAYER

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                  Fig1013 Top layer of power supply

                                                  card

                                                  Fig1014 Schematic diagram of power supply card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  102 BATTERY CHARGER CARD

                                                  1021 SCHEMATIC DIAGRAM

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                  Fig1021 Schematic diagram of battery charger card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  103 RELAY CARD

                                                  1031 SCHIMETIC DIAGRAM

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                  Fig1031 Schematic diagram of Relay card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1032 RELAY CARD LEGEND MARKING

                                                  1033 TOP LAYER

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                  Fig1032 Legend marking of Relay card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1034 BOTTOM LAYER

                                                  104 MICROCONTROLER CARD

                                                  1041 SCHIMETIC DIAGRAM

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                  Fig1034 Bottom layer of Relay card

                                                  Fig1041 Schematic diagram of microcontroller card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1042 ALL LAYERS

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                  Fig1042 All layer of microcontroller card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 11

                                                  INTRODUCTION

                                                  OF SOFTWARE

                                                  Keil (microVision 2)

                                                  Eagle (Easily Applicable Graphical Layout Editor)

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  111 Keil (microVision 2)

                                                  1111 Introduction to C51 Cross Compiler

                                                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                  generates object code that matches the efficiency and speed of assembly programming

                                                  Using a high-level language like C has many advantages over assembly language

                                                  programming

                                                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                  the memory structure of the 8051 CPU is desirable (but not necessary)

                                                  Details like register allocation and addressing of the various memory types and data

                                                  types is managed by the compiler

                                                  Programs get a formal structure (which is imposed by the C programming language) and

                                                  can be divided into separate functions This contributes to source code reusability as

                                                  well as better overall application structure

                                                  The ability to combine variable selection with specific operations improves program

                                                  readability

                                                  Keywords and operational functions that more nearly resemble the human thought

                                                  process may be used

                                                  Programming and program test time is drastically reduced

                                                  The C run-time library contains many standard routines such as formatted output

                                                  numeric conversions and floating-point arithmetic

                                                  Existing program parts can be more easily included into new programs because of

                                                  modular program construction techniques

                                                  The language C is a very portable language (based on the ANSI standard) that enjoys

                                                  wide popular support and is easily obtained for most systems Existing program

                                                  investments can be quickly adapted to other processors as needed

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1112 Software Development Cycle in Keil

                                                  When we use the Keil Software tools the

                                                  project development cycle is roughly the same as

                                                  it is for any other software development project

                                                  1 Create a project select the target chip from the

                                                  device database and configure the tool settings

                                                  2 Create source files in C or assembly

                                                  3 Build your application with the project

                                                  manager

                                                  4 Correct errors in source files

                                                  5 Test the linked application A block diagram of

                                                  the complete 8051 tool set may best illustrate the

                                                  development cycle

                                                  112 Eagle (Easily Applicable Graphical Layout Editor)

                                                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                  1121 Schematic Editor

                                                  In this one can develop amp design circuits for the required PCB

                                                  1122 Layout Editor

                                                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                  Fig 111 Software development in KEIL

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1123 Library Editor

                                                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                  1124 Auto Router

                                                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                  the PCB tracks designed

                                                  1125 Cam Processor

                                                  This is used to finally print the various layers of the designed PCB viz Top Layer

                                                  Bottom Layer Component Layer Masking Layer etc

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                  Start

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 12

                                                  INTRODUCTION

                                                  OF

                                                  PROGRAMMING

                                                  Flowchart of programming

                                                  Program code

                                                  121 Flowchart

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                  2

                                                  flag9==1

                                                  flag9=1

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                  flag11==1

                                                  flag11=1 flag11=0 flag4=0

                                                  REady_LED4=0

                                                  Sw2_op (P01) ==0

                                                  My delay (10)

                                                  3 3

                                                  flag2=1 disp2=1 k2=0

                                                  3

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                  4

                                                  flag11==1

                                                  flag11=0 flag4=0 REady_LED4=0

                                                  flag11=1

                                                  My delay (10)

                                                  flag3=1 disp3=1 k3=0

                                                  k1==0||k2==0||k4==0

                                                  Sw3_op (P02) ==0

                                                  5

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                  flag5==1

                                                  5

                                                  flag11==1

                                                  flag7=1

                                                  flag7==1

                                                  flag7=0 flag2=0 REady_LED2=0

                                                  6

                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                  flag11=0 flag4=0 REady_LED4=0

                                                  flag11=1

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                  6

                                                  My delay (10)

                                                  flag4=1 disp4=1 k4=0

                                                  k1==0||k2==0||k3==0 flag5==1

                                                  7

                                                  Sw4_op (P03) ==0

                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                  7

                                                  flag7==1

                                                  flag9==1

                                                  flag7=1

                                                  flag7=0 flag2=0 REady_LED2=0

                                                  flag9=0 flag3=0 REady_LED3=0

                                                  flag9=1

                                                  Sw5_op A(P04) ==0

                                                  My delay (10)

                                                  8

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                  9

                                                  flag2==1

                                                  flag3==1

                                                  8

                                                  flag1==1

                                                  flag4==1 flag5=1 disp5=1

                                                  flag9=1 disp5=1

                                                  flag7=1 disp5=1

                                                  flag11=1 disp5=1

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                  Sw6_op (P05) ==0

                                                  My delay (10)

                                                  flag2==1 ampamp flag7==1

                                                  flag3==1 ampamp flag9==1 9

                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                  flag8=1 disp6=1

                                                  10

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                  10

                                                  flag4==1 ampamp flag11==1

                                                  flag10=1 disp6=1

                                                  flag12=1 disp6=1

                                                  flag8==1

                                                  flag10==1

                                                  11

                                                  flag6==1

                                                  i++

                                                  l++

                                                  j++

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                  flag12==1

                                                  M++

                                                  11

                                                  Stop

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  122 Program

                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                  define buzzerP2_0 buzzer indication

                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                  output Led for indication

                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                  function prototype declaration

                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                  void init_timer() timer 0 initialization function

                                                  variable declaration

                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  start of main programme

                                                  void main()

                                                  init_timer() call it timer initialization function

                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                  start of while loop

                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                  condition for switch1

                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                  if(iltk) loop will repeat for desired time of charging

                                                  if(igt=1000)

                                                  buzzer=1 turn on buzzer if (ii==20)

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  REady_LED1=1 turn on ready indication of led1

                                                  else if(ii==40)

                                                  REady_LED1=0ii=0

                                                  elseREady_LED1=0

                                                  START_LED1=1

                                                  else

                                                  START_LED1=0

                                                  k1=1 buzzer=0

                                                  REady_LED1=0 flag1=0

                                                  flag5=0flag6=0

                                                  condition for switch2

                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                  REady_LED2=1 turn on ready 2 led indication

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  disp2=0

                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                  if(jltk)

                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                  elseREady_LED2=0

                                                  START_LED2=1

                                                  else START_LED2=0

                                                  REady_LED2=0 k2=1 buzzer=0

                                                  flag2=0flag7=0flag8=0

                                                  j=0jj=0

                                                  condition for switch 3

                                                  if(flag3==1) check swich3 pressed

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  if(disp3==1 )

                                                  REady_LED3=1 disp3=0

                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                  if(lltk)

                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                  elseREady_LED3=0

                                                  START_LED3=1

                                                  else START_LED3=0

                                                  LED2=0 k3=1 buzzer=0

                                                  REady_LED3=0 flag3=0

                                                  flag9=0flag10=0

                                                  l=0ll=0

                                                  condition for switch 4

                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  REady_LED4=1 disp4=0

                                                  if(flag11==1) check coin is pressed

                                                  if(flag12==1) START is pressed

                                                  if(mltk)

                                                  if(mgt1000)

                                                  buzzer=1 if(mm==20)

                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                  elseREady_LED4=0

                                                  START_LED4=1

                                                  else START_LED4=0

                                                  buzzer=0 k4=1

                                                  REady_LED4=0 flag4=0

                                                  flag11=0flag12=0

                                                  m=0mm=0

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  while(1)

                                                  end of main programme

                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                  whenever specific time the interrupt will generate control will go in following function

                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if(sw1_op==0 ) ready switch flag for system1

                                                  my_delay(10) CALL DELAY FUNCTION

                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                  if(flag7==1) SET THE FLAG

                                                  flag7=1

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                  flag9=1

                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                  flag11=1

                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if(sw2_op==0 ) fready switch flag for system2

                                                  my_delay (10)

                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                  if(flag5==1)

                                                  flag5=1

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                  flag9=1

                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                  flag11=1

                                                  elseflag11=0flag4=0REady_LED4=0

                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                  if(flag7==1)

                                                  flag7=1

                                                  else

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                  flag5=1

                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                  flag11=1

                                                  elseflag11=0flag4=0REady_LED4=0

                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                  if(flag7==1)

                                                  flag7=1

                                                  elseflag7=0

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                  flag5=1

                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                  flag9=1

                                                  elseflag9=0flag3=0REady_LED3=0

                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                  if(flag6==1)

                                                  i++ if (igt1000) ii++

                                                  if (flag8==1)

                                                  j++ if(jgt1000) jj++

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  if (flag10==1)

                                                  l++ if (lgt1000) ll++

                                                  if (flag12==1)

                                                  m++ if (mgt1000) mm++

                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 13

                                                  TROUBLE SHOOT

                                                  Troubleshoot

                                                  131 TROUBLE SHOOT

                                                  A newly assembled circuit does not work may be due to -

                                                  Faulty components

                                                  Improper soldering

                                                  Wrong connections

                                                  Also any stop in working after some period may be due to -

                                                  Component failure

                                                  Supply failure

                                                  Damaging of PCB

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Fault finding is very essential if you want the circuit to operate properly

                                                  If a newly assembled circuit is not working properly check all the components and

                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                  proper soldering

                                                  If faults are not observed during physical observations one should proceed for Hot

                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                  Resistance measurement is also done which is known as Dry test

                                                  During this project work some green LEDs was not glow then we checked it

                                                  continuity and replace it

                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                  heated after starting the project It happens because of some soldering points are shorted

                                                  during soldering PCB We solved that problem

                                                  CHAPTER 14

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  ADVANTAGES OF

                                                  THE PROJECT

                                                  Advantages

                                                  141 ADVANTAGES OF THE PROJECT

                                                  Simple and hand efficient Microcontroller based system

                                                  Fast charging capacity

                                                  Simple to operate

                                                  Ease of mobility

                                                  Facilitates connectivity for 90 of cellular phones

                                                  Less expensive

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Reduced man power

                                                  Low power consumption

                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                  CHAPTER 15

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  DISADVANTAGES

                                                  OF THE PROJECT

                                                  Disadvantages

                                                  151 DISADVANTAGES OF THE PROJECT

                                                  It requires mains supply to work project

                                                  Due to limited charging channels till now there may be a possibility that

                                                  mobile phones of few brands cannot be connected for charging For this

                                                  purpose we have to use separate connectors for that specific brand differently

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                  min

                                                  It does not have battery backup therefore it cannot be portable

                                                  CHAPTER 16

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  APPLICATIONS OF

                                                  THE PROJECT

                                                  Application

                                                  161 APPLICATIONS OF THE PROJECT

                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                  charge for the mobile phone in any places

                                                  It is used for emergency charging purposes

                                                  It can be installed in malls railway stations bus stops and other public

                                                  places

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  The charger offers a unique revenue opportunity for a vast range of

                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                  any location where there is a high footfall creating a large number of

                                                  potential users

                                                  It can be installed in offices and collages for pay charging facility

                                                  CHAPTER 17

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  FUTURE

                                                  DEVELOPMENT OF

                                                  THE PROJECT

                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                  This project is very useful to people who are using mobile phone without charging

                                                  condition in public places

                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                  It will provide battery backup for make it portable

                                                  It will also provide SMS system in future

                                                  We can also increase the charging time by editing software of the project

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 18

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  COST ANALYSIS

                                                  OF THE PROJECT

                                                  COST ANALYSIS OF THE PROJECT

                                                  181 COST ANALYSIS OF THE PROJECT

                                                  1811 Component list for power supply card

                                                  Footprint Quantity Designators Rate

                                                  Resistor

                                                  22K 1 R2 1

                                                  1K 1 R1 1

                                                  Capacitor

                                                  1000uf25V 1 C5 10

                                                  2200uf25V 1 C1 10

                                                  022uf 2 C6 C2 1

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                  Table 1811 Component list for power supply card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  01uf 2 C4 C3 1

                                                  IC

                                                  BRIDGE W10 2 BR2 BR1 10

                                                  L7812CV (TO-220) 1 U2 8

                                                  L7805CV (TO-220) 1 U1 8

                                                  Connector

                                                  CON PHO 2PIN 2 J3 J2 16

                                                  CON PHO 3PIN 1 J1 12

                                                  LED3mm red 2 L1 L2 15

                                                  Heat sink (TO-220) 2 16

                                                  Total 955

                                                  1812 Component list for battery charger card

                                                  Footprint Quantity Rate

                                                  Capacitor

                                                  2200uf25V 1 1000

                                                  022uf 4 100

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  01uf 4 100

                                                  IC

                                                  BRIDGE W10 1 500

                                                  L7805CV (TO-220) 4 3200

                                                  Connector

                                                  CON PHO 2PIN 1 800

                                                  Relimate 2 pin 1 400

                                                  relimate 3 pin 4 2000

                                                  Heat sink (TO-220) 4 1200

                                                  TOTAL 9300

                                                  1813 Component list for Relay card

                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                  Table 1812Component list for battery charger card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                  Total 18900

                                                  1814Component list for controller card

                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                  Table 1813Component list for relay card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                  total 27000

                                                  1815 Miscellaneous material

                                                  Material Quantity Rate

                                                  electronic item

                                                  Transformer

                                                  TXR1 0-9-15 1 20000

                                                  0-9 1A

                                                  0-15 100mA

                                                  TXR2 0-9 1 16500

                                                  0-9 1A

                                                  Proximity switch 1 20000

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                  Table 1814Component list for microcontroller card

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Red push bottom 4 4000

                                                  Green push button 1 1000

                                                  Red led 5mm 4 800

                                                  Green led 5mm 4 800

                                                  Led holder 8 1600

                                                  Copper clad 2 4000

                                                  3 core cable 1 meter 1500

                                                  3 pin plug 1 3000

                                                  2 pin relimate wire 19 9000

                                                  3 pin relimate wire 5 3750

                                                  4 pin relimate wire 2 2000

                                                  mechanical items

                                                  Enclosure 1 25000

                                                  Acrylic sheet 2 X 1 30000

                                                  12mm cable gland 1 1000

                                                  Screw 3mm 33 2000

                                                  Screw 35mm 6 2400

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  10 mm spacers 100 1500

                                                  10mm insert to stud 50 10000

                                                  cable tie 2500

                                                  Total 162350

                                                  CHAPTER 19

                                                  APPENDIX

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                  Table 1815Component list for miscellaneous material

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  APPENDIX

                                                  191 APPENDIX

                                                  1911 78xx IC datasheet

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1912 W10 datasheet

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1913 4n33 IC datasheet

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                  1914 MAX 232

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1915 ULN2003a IC datasheet

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  1916 89V51RD2 IC datasheet

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 20

                                                  CONCLUSION

                                                  CONCLUSION

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  201 CONCLUSION

                                                  The coin-operated mobile phone charger is already successfully installed in

                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                  installed in any business premises

                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                  a high footfall creating a large number of potential users

                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                  extend low mobile phone talk time provide battery charging

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 21

                                                  IMAGES OF THE

                                                  PROJECT

                                                  Images of the project

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  211 IMAGES OF THE PROJECT

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                  fig211 lsquoCoin operated mobile battery charger

                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Fig 216 Relay driver circuit

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                  Fig 213 Constant voltage battery charger circuit

                                                  Fig214 Power supply circuit

                                                  Fig215 Metal detector proximity switch

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Fig217 Microcontroller circuit

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  Fig228 coin operated mobile battery charger project presentation

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                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  CHAPTER 22

                                                  BIBILOGRAPHY

                                                  BIBLIOGRAPHY

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                  221 BIBLIOGRAPHY

                                                  BOOKS

                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                  INTERNET LINKS

                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                  • CHAPTER 1

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 7

                                                    INTRODUCTION

                                                    OF COMPONENTS

                                                    Working of components

                                                    Features or Uses of components

                                                    Testing of components

                                                    71 RESISTOR

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 26

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    711 WORKING

                                                    Resistors limit current Resistors are considered to be the most used and the most

                                                    important component of all the electronic circuits Resistors resist the flow of electrical

                                                    current The higher the value of resistance (measured in ohms)

                                                    the lower the current will be

                                                    712 TESTING

                                                    Read the indicated color code value then select the OHM-scale within but not way

                                                    below the indicated value A resistor is good if its resistance is close to the indicated

                                                    Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                                    all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                                    ohmmeter scale settings resistor is shorted

                                                    713 SPECIFICATIONS

                                                    To completely specify a resistors characteristics requires knowledge of the following

                                                    parameters-

                                                    bull Value

                                                    bull Tolerance

                                                    bull Temperature Coefficient

                                                    bull Power Rating

                                                    The specification of a resistor may be marked on its surface using either of two

                                                    systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                                    the second more recent system uses a combination of alpha-numeric characters

                                                    7 2 CAPACITOR

                                                    721 WORKING

                                                    When DC voltage is applied to the capacitor an electric charge is stored on each

                                                    electrode While the capacitor is charging up current flows The current will stop flowing

                                                    when the capacitor has fully charged Capacitors find use

                                                    in circuits for a variety of purposes They are used in

                                                    time delay generation RC circuits In power supplies for filtering and power supply

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    decoupling as blocking capacitors for power factor correction and motor starting in LC

                                                    tank circuits and so on

                                                    722 TESTING

                                                    To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                                    negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                                    A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                                    and moves back again to infinite resistance position A defective indication for an

                                                    electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                                    which is an indication that the capacitor is shorted

                                                    73 LIGHT EMITING DIODE (LED)

                                                    731 WORKING

                                                    LEDs are special diodes that emit light when

                                                    connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                                    indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                                    the heart of an LED the semi-conductor chip

                                                    In our project Green LED are used here for mainly two purpose

                                                    a Charging ON indication (when ON)

                                                    b Channel fault indication (always OFF)

                                                    732 TESTING

                                                    The good and working LED will then light up or glow a busted LED will not LEDs

                                                    must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                                    1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                                    directly connected to a battery or power supply It will be destroyed the LED

                                                    733 FEATURES

                                                    Single color

                                                    High bright output

                                                    Low power consumption

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    High reliability and long life

                                                    734 Descriptions

                                                    Dice material GaInN

                                                    Emitting Color Super Bright White

                                                    Device Outlineφ5mm Round Type

                                                    Lens Type Water Clear

                                                    74 RELAY

                                                    741 WORKING

                                                    A relay is an electrically operated switch Current

                                                    flowing through the coil of the relay creates a magnetic field

                                                    which attracts a lever and changes the switch contacts The coil

                                                    current can be on or off so relays have two switch positions and

                                                    most have double throw (changeover) switch contacts

                                                    Relays are like remote control switches and are used in

                                                    many applications because of their relative simplicity long life

                                                    and proven high reliability

                                                    742 USES

                                                    The main operation of a relay comes in places where only a low-power signal can be

                                                    used to control a circuit

                                                    It is also used in places where only one signal can be used to control a lot of circuits

                                                    The application of relays started during the invention of telephones They played an

                                                    important role in switching calls in telephone exchanges They were also used in

                                                    long distance telegraphy They were used to switch the signal coming from one

                                                    source to another destination

                                                    743 TESTING

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    A relay will usually have a coil pole terminal and a set of

                                                    contacts The set of contacts that are open when the relay is not

                                                    energized are called normally open (NO) contacts and the set of

                                                    contacts that are closed when the relay is not energized are called

                                                    normally closed (NC) contacts The following steps can be used to perform the testing of

                                                    the relay using a multimeter

                                                    Keep the multimeter in the continuity check mode

                                                    Check for continuity between the NC contacts and pole

                                                    Check for discontinuity between NO contacts and the pole

                                                    Now energies the relay using the rated voltage For example use a 9V battery for

                                                    energizing a 9V relay The relay will engage with clicking sound

                                                    Now check for continuity between NO contacts and pole

                                                    Also check for discontinuity between NC contacts and pole

                                                    As a final test measure the resistance of the relay coil using a multimeter and check

                                                    whether it is matching to the value stated by the manufacturer

                                                    If all the above tests are positive we can conclude that the relay is healthy

                                                    75 TRANSFORMER

                                                    751 WORKING

                                                    A transformer is a device that transfers electrical energy

                                                    from one circuit to another through inductively coupled

                                                    electrical conductors A changing current in the first circuit (the

                                                    primary) creates a changing magnetic field

                                                    This changing magnetic field induces a changing voltage in the second circuit (the

                                                    secondary) This effect is called mutual induction

                                                    If a load is connected to the secondary circuit electric charge will flow in the

                                                    secondary winding of the transformer and transfer energy from the primary circuit to the

                                                    load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                    of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                    number of primary turns

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    By appropriate selection of the numbers of turns a transformer thus allows an

                                                    alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                    making it less

                                                    752 TESTING

                                                    1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                    scale and then adjusting the knob to verify its reading is an easy step to the

                                                    reading of the ohm

                                                    2 To check the resistance of the coil unplug or unsolder the leads of the

                                                    transformer from its circuit and measure the resistance of each coil

                                                    3 The next step is to test each coil for shorts to other coils

                                                    76 RECTIFIER BRIDGE (W 10)

                                                    761 WORKING

                                                    A diode bridge rectifier is a device for converting AC or

                                                    alternating current electricity into DC or direct current AC

                                                    electricity goes from positive to negative constantly whereas DC

                                                    always flows in the same direction

                                                    AC electricity is more efficient to transmit and easier to

                                                    convert into different voltages However most appliances need DC current to run A diode

                                                    bridge rectifier is the most common type of power supply used to provide this current In

                                                    our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                    77 OSCILLATOR

                                                    771 Working

                                                    An oscillator puts out an endless series of pulses The output

                                                    constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    all digital circuits have some type of oscillator This stream of output pulses is often

                                                    called a clock One of the most important features of any oscillator is its frequency stability

                                                    or in other words its ability to provide a constant frequency output under varying load

                                                    conditions Some of the factors that affect the frequency stability of an oscillator include

                                                    temperature variations in the load and changes in the DC power supply Frequency stability

                                                    of the output signal can be improved by the proper selection of the components used for the

                                                    resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                    be obtained from normal LC and RC tank circuits

                                                    In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                    divided to give you exact clock rates for most of the common baud rates for the UART

                                                    especially for the higher speeds (9600 19200) These crystals are readily available and

                                                    commonly used

                                                    78 SWITCH

                                                    781 WORKING

                                                    The most familiar form of switch is a manually operated

                                                    electromechanical device with one or more sets of electrical contacts

                                                    Each set of contacts can be in one of two states either closed meaning

                                                    the contacts are touching and electricity can flow between them or

                                                    open meaning the contacts are separated and the switch is non

                                                    conducting The mechanism actuating the transition between these two

                                                    states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                    momentary (push-for on or push-for off) type

                                                    782 USES

                                                    In electronics a switch is an electrical component that can break an electrical

                                                    circuit interrupting the current or diverting it from one conductor to another

                                                    783 TESTING

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                    no connection Switch can tested by using multimeter in continuity range

                                                    79 DARLINGTON PAIR IC (ULN2003a)

                                                    791 WORKING

                                                    The Darlington transistor (often called a Darlington pair) is a

                                                    compound structure consisting of two bipolar transistors (either

                                                    integrated or separated devices) connected in such a way that the

                                                    current amplified by the first transistor is amplified further by the

                                                    second one This configuration gives a much higher current gain than

                                                    each transistor taken separately and in the case of integrated devices

                                                    can take less space than two individual transistors because they can

                                                    use a shared collector

                                                    Integrated Darlington pairs come packaged singly in

                                                    transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                    The Darlington transistor array used is ULN2003 Applications include relay

                                                    drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                    drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                    to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                    for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                    792 FEATURES

                                                    The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                    transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                    with common-cathode clamp diodes for switching inductive loads The collector-current

                                                    rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                    higher current capability

                                                    710 SERIES VOLTAGE REGULATER IC (78XX)

                                                    7101 WORKING

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Voltage Regulator (regulator) usually having three legs converts varying input

                                                    voltage and produces a constant regulated output voltage They are available in a variety of

                                                    outputs

                                                    The most common part numbers start with the numbers 78 or 79 and finish with two

                                                    digits indicating the output voltage The number 78 represents positive voltage and 79

                                                    negative one The 78XX series of voltage regulators are designed for positive input

                                                    The LM78XX series typically has the ability to drive current up to 1A For

                                                    application requirements up to 150mA 78LXX can be used As mentioned above the

                                                    component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                    an output leg with the regulators voltage

                                                    As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                    voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                    difference between the input and output appears as heat If the input voltage is unnecessarily

                                                    high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                    sinking the regulator will shut down

                                                    711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                    7111 WORKING

                                                    The MAX-232 It includes a Charge Pump which generates

                                                    +10V and -10V from a single 5v supply

                                                    This IC also includes two receivers and two transmitters in

                                                    the same package This is handy in many cases when we only want to

                                                    use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                    receive line and one for the transmit There are also many variations of these devices The

                                                    large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                    available which use smaller capacitors and even some with inbuilt capacitors However the

                                                    MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                    Dual Charge-Pump Voltage Converter

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                    V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                    output

                                                    712 OPTOCOUPLER IC (4N33)

                                                    7121 WORKING

                                                    In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                    photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                    between elements of a circuit typically a transmitter and a receiver while keeping them

                                                    electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                    back to an electrical signal electrical contact along the path is broken

                                                    Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                    essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                    arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                    light-triggered diac The two are separated by a transparent barrier which blocks any

                                                    electrical current flow between the two but does allow the passage of light

                                                    The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                    silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                    of isolation between driving and load circuits These Optocouplers can be used to replace

                                                    reed and mercury relays with advantages of long life high speed switching and elimination

                                                    of magnetic field

                                                    713 MICROCONTROLLER IC (89V51 RD 2 )

                                                    713 WORKING

                                                    The P89V51RD2 is an 80C51 microcontroller with 64

                                                    kB Flash and 1024 bytes of data RAM

                                                    A key feature of the P89V51RD2 is its X2 mode option

                                                    The design engineer can choose to run the application with the conventional 80C51 clock

                                                    rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                    feature is to keep the same performance by reducing the clock frequency by half thus

                                                    dramatically reducing the EMI

                                                    The Flash program memory supports both parallel programming and in serial In-

                                                    System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                    speed reducing programming costs and time to market ISP allows a device to be

                                                    reprogrammed in the end product under software control The capability to fieldupdate the

                                                    application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                    In-Application Programmable (IAP) allowing the Flash program memory to be

                                                    reconfigured even while the application is running

                                                    714 RELIMATE CONNECTOR

                                                    7141 WORKING

                                                    These are wire to board type connectors used to facilitate

                                                    proper and firm electrical connection between the relay card and

                                                    microcontroller card

                                                    The connector has following specifications

                                                    No of Ways 2-20

                                                    Voltage Rating 250V AC DC

                                                    Current Rating 3A AC DC

                                                    Contact Resistance 20mW max

                                                    Insulation Resistance 1000MW min

                                                    Dielectric Withstanding 1000V ACminute

                                                    Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                    The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                    connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                    conflicts

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    715 RS-232 PORT CONNECTOR

                                                    7151 WORKING

                                                    Almost all digital devices which we use require either TTL

                                                    or CMOS logic levels Therefore the first step to connecting a

                                                    device to the RS-232 port is to transform the RS-232 levels back

                                                    into 0 and 5 Volts This is done by RS-232 Level Converters

                                                    Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                    Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                    The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                    problem in many instances where only a single supply of +5V is present

                                                    CHAPTER 8

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    IMPLIMENTATION

                                                    OF THE PCB

                                                    Components layout designing

                                                    Developing or Etching the PCB

                                                    Other operations like Drilling Cutting Tinning

                                                    81 IMPLIMENTATION OF THE PCB

                                                    A proper PCB ensure that various circuit components are interconnected as per the

                                                    circuit diagram once they have been placed on the PCB in their proper positions and

                                                    subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                    base material to which is permanently attached a flat metallic network of conducting path

                                                    whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                    for this project is single one

                                                    The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                    board configuration however is most widely used and it may be of the nature of the single

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                    which ensures adequate and permanent low resistance coupling

                                                    811 BOARD DESIGN

                                                    PCB designed is the most important and requires great care during work In this case

                                                    great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                    is designed it is virtually impossible to alter it While designing a circuit designer should

                                                    take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                    unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                    also help to solve this problem when circuit is complicated

                                                    812 THE MASTER DIAGRAM

                                                    The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                    which is commonly made twice as the finished circuit since this makes the working on that

                                                    much easier especially when circuit is complicated photography eventually reduces the

                                                    size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                    the designing -

                                                    a The space between the conductors must be strictly controlled to avoid the possibility

                                                    of electrical discharges or unwanted capacitance The amount by which the mater

                                                    diagram is to reduce in size is thus a critical deign feature

                                                    b The conductor must be wider in those part of the circuits that are going to handle

                                                    large current must be handle without undue temperature of conductors

                                                    c The minimum width of copper should not generally be less than about 15mmThis

                                                    is related to mechanical strength rather than electrical properties and it also ensure

                                                    that strips remains securely bounded to the base material

                                                    d The points where the component holes for component lead wire occurs must be sited

                                                    to suit the dimensions of the component and dimensions between lead-out wire so

                                                    that the components can be situated correctly on finished board The conductor is

                                                    also main large at the point of holes

                                                    813 PCB MAKING

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    When the mater diagram probable twice the size of real PCB has been evolved the

                                                    test major step consists of etching or dissolving the unwanted metal from copper claded

                                                    board to create a circuit as depicted by master diagram It must be stressed that very

                                                    accurate checking master is essential at this stage Then the master point is mounted on a

                                                    special frame on easy facing of a larger camera and with the aid of the very powerful

                                                    illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                    developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                    brought into operation This comprises the camera body mounted so that sideways after

                                                    each exposure In this way number of copies of the original master diagram is set out

                                                    exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                    In case of simple and need of number of less PCB economic and advisable to use the

                                                    following lab method of PCB making

                                                    Planning The Circuit

                                                    It is not a particular difficult There are several important factors that need not be

                                                    taken into account if the finished device is to work properly we must consider gain factor

                                                    and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                    possibility We must also ensure that conductors and components carrying high frequency

                                                    current are well separated from the part of the circuit We are also to make sure that all

                                                    components need to return to earth are properly connected and that possibility of common

                                                    impedance arising earth returned

                                                    Circuit is totally eliminated by making all earth as substantial possible consistent

                                                    with nature of design Other factors that have to successfully studied include availability of

                                                    adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                    made for mechanical fixing ventilation effect of vibration

                                                    Cleaning The Board

                                                    The copper side of the board must be thoroughly cleaned before circuit plan is

                                                    transferred to it This is important because even slightest trace of graze (from figure of

                                                    instance) will impure the etching process and when the circuit plan has been neatly

                                                    transferred to copper in this manner the board is held under running tap and the allowed to

                                                    dry before resist is applied

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Transforming the Plan

                                                    Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                    A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                    board and working plan and carefully trace the lines of original plan with a ball pen

                                                    Resist

                                                    Resist is nothing more than a substrate that is unaffected by presence etching

                                                    chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                    clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                    covered when resists the leaguer type of paints possess good resist properties but

                                                    disadvantage of relatively long time taken for drying It is essential to resist through

                                                    hardening before etching is started Nail polished are better as they quickly and are less

                                                    difficult to remove

                                                    To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                    PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                    short circulating due to paints are completely the avoid etching tapes and pads are available

                                                    in different sizes

                                                    Correcting Error

                                                    When a result has been thoroughly hardened any errors that have been made can

                                                    usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                    edges of copper conductors on board the resist must be applied with steady band

                                                    Etching

                                                    Next comes etching of unwanted copper amp whether a small single is all that is

                                                    required as quantity of board to be produce certain precautions must be taken before

                                                    operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                    quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                    etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                    grams of water

                                                    Agitation

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                    the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                    temperature and thickness of copper foil

                                                    Finishing Off

                                                    When all unwanted copper is dissolved from areas between conductor board should

                                                    be taken from an etchant amp washed in water The resist must be removed using proper

                                                    solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                    seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                    This process is called Tinning This process of coating involve track with soldier

                                                    Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                    Assembling On PCB

                                                    After the holes are drilled the component have to be assembled on PCB before

                                                    assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                    accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                    repetitive use cleans soldering iron

                                                    CHAPTER 9

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    SOLDERING

                                                    TECHNIQUE

                                                    Technique for good soldering

                                                    91 SOLDERING TECHNIQUE

                                                    For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                    oxide film or dirt on it If required flux is applied on the points to be soldered

                                                    Now the joint to be soldered is heated with the help of soldering iron Heat

                                                    applied should be such that when solder wire is touched to joint it must melt

                                                    quickly

                                                    The joint and the soldering iron is held such that molten solder should flow

                                                    smoothly over the joint

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    When joint is completely covered with molten solder the soldering iron is re-

                                                    moved

                                                    The joint is allowed to cool without any movement

                                                    The bright shining solder indicates good soldering

                                                    In case of dry solder joint a air gap remains in between the solder material and

                                                    the joint It means that soldering is improper This is removed and again solder-

                                                    ing is done

                                                    Thus this way all the components are soldered on P C B

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 10

                                                    PCB LAYOUTS

                                                    Schematic diagram

                                                    Bottom and top layout

                                                    101 POWER SUPPLY CARD

                                                    1011 SCHIMETIC DIAGRAM

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1012 LEGEND MARKING

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                    Fig1011 Schematic diagram of power supply card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1013TOP LAYER

                                                    1014 BOTTOM LAYER

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                    Fig1013 Top layer of power supply

                                                    card

                                                    Fig1014 Schematic diagram of power supply card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    102 BATTERY CHARGER CARD

                                                    1021 SCHEMATIC DIAGRAM

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                    Fig1021 Schematic diagram of battery charger card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    103 RELAY CARD

                                                    1031 SCHIMETIC DIAGRAM

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                    Fig1031 Schematic diagram of Relay card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1032 RELAY CARD LEGEND MARKING

                                                    1033 TOP LAYER

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                    Fig1032 Legend marking of Relay card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1034 BOTTOM LAYER

                                                    104 MICROCONTROLER CARD

                                                    1041 SCHIMETIC DIAGRAM

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                    Fig1034 Bottom layer of Relay card

                                                    Fig1041 Schematic diagram of microcontroller card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1042 ALL LAYERS

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                    Fig1042 All layer of microcontroller card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 11

                                                    INTRODUCTION

                                                    OF SOFTWARE

                                                    Keil (microVision 2)

                                                    Eagle (Easily Applicable Graphical Layout Editor)

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    111 Keil (microVision 2)

                                                    1111 Introduction to C51 Cross Compiler

                                                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                    generates object code that matches the efficiency and speed of assembly programming

                                                    Using a high-level language like C has many advantages over assembly language

                                                    programming

                                                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                    the memory structure of the 8051 CPU is desirable (but not necessary)

                                                    Details like register allocation and addressing of the various memory types and data

                                                    types is managed by the compiler

                                                    Programs get a formal structure (which is imposed by the C programming language) and

                                                    can be divided into separate functions This contributes to source code reusability as

                                                    well as better overall application structure

                                                    The ability to combine variable selection with specific operations improves program

                                                    readability

                                                    Keywords and operational functions that more nearly resemble the human thought

                                                    process may be used

                                                    Programming and program test time is drastically reduced

                                                    The C run-time library contains many standard routines such as formatted output

                                                    numeric conversions and floating-point arithmetic

                                                    Existing program parts can be more easily included into new programs because of

                                                    modular program construction techniques

                                                    The language C is a very portable language (based on the ANSI standard) that enjoys

                                                    wide popular support and is easily obtained for most systems Existing program

                                                    investments can be quickly adapted to other processors as needed

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1112 Software Development Cycle in Keil

                                                    When we use the Keil Software tools the

                                                    project development cycle is roughly the same as

                                                    it is for any other software development project

                                                    1 Create a project select the target chip from the

                                                    device database and configure the tool settings

                                                    2 Create source files in C or assembly

                                                    3 Build your application with the project

                                                    manager

                                                    4 Correct errors in source files

                                                    5 Test the linked application A block diagram of

                                                    the complete 8051 tool set may best illustrate the

                                                    development cycle

                                                    112 Eagle (Easily Applicable Graphical Layout Editor)

                                                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                    1121 Schematic Editor

                                                    In this one can develop amp design circuits for the required PCB

                                                    1122 Layout Editor

                                                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                    Fig 111 Software development in KEIL

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1123 Library Editor

                                                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                    1124 Auto Router

                                                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                    the PCB tracks designed

                                                    1125 Cam Processor

                                                    This is used to finally print the various layers of the designed PCB viz Top Layer

                                                    Bottom Layer Component Layer Masking Layer etc

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                    Start

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 12

                                                    INTRODUCTION

                                                    OF

                                                    PROGRAMMING

                                                    Flowchart of programming

                                                    Program code

                                                    121 Flowchart

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                    2

                                                    flag9==1

                                                    flag9=1

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                    flag11==1

                                                    flag11=1 flag11=0 flag4=0

                                                    REady_LED4=0

                                                    Sw2_op (P01) ==0

                                                    My delay (10)

                                                    3 3

                                                    flag2=1 disp2=1 k2=0

                                                    3

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                    4

                                                    flag11==1

                                                    flag11=0 flag4=0 REady_LED4=0

                                                    flag11=1

                                                    My delay (10)

                                                    flag3=1 disp3=1 k3=0

                                                    k1==0||k2==0||k4==0

                                                    Sw3_op (P02) ==0

                                                    5

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                    flag5==1

                                                    5

                                                    flag11==1

                                                    flag7=1

                                                    flag7==1

                                                    flag7=0 flag2=0 REady_LED2=0

                                                    6

                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                    flag11=0 flag4=0 REady_LED4=0

                                                    flag11=1

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                    6

                                                    My delay (10)

                                                    flag4=1 disp4=1 k4=0

                                                    k1==0||k2==0||k3==0 flag5==1

                                                    7

                                                    Sw4_op (P03) ==0

                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                    7

                                                    flag7==1

                                                    flag9==1

                                                    flag7=1

                                                    flag7=0 flag2=0 REady_LED2=0

                                                    flag9=0 flag3=0 REady_LED3=0

                                                    flag9=1

                                                    Sw5_op A(P04) ==0

                                                    My delay (10)

                                                    8

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                    9

                                                    flag2==1

                                                    flag3==1

                                                    8

                                                    flag1==1

                                                    flag4==1 flag5=1 disp5=1

                                                    flag9=1 disp5=1

                                                    flag7=1 disp5=1

                                                    flag11=1 disp5=1

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                    Sw6_op (P05) ==0

                                                    My delay (10)

                                                    flag2==1 ampamp flag7==1

                                                    flag3==1 ampamp flag9==1 9

                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                    flag8=1 disp6=1

                                                    10

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                    10

                                                    flag4==1 ampamp flag11==1

                                                    flag10=1 disp6=1

                                                    flag12=1 disp6=1

                                                    flag8==1

                                                    flag10==1

                                                    11

                                                    flag6==1

                                                    i++

                                                    l++

                                                    j++

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                    flag12==1

                                                    M++

                                                    11

                                                    Stop

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    122 Program

                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                    define buzzerP2_0 buzzer indication

                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                    output Led for indication

                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                    function prototype declaration

                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                    void init_timer() timer 0 initialization function

                                                    variable declaration

                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    start of main programme

                                                    void main()

                                                    init_timer() call it timer initialization function

                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                    start of while loop

                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                    condition for switch1

                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                    if(iltk) loop will repeat for desired time of charging

                                                    if(igt=1000)

                                                    buzzer=1 turn on buzzer if (ii==20)

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    REady_LED1=1 turn on ready indication of led1

                                                    else if(ii==40)

                                                    REady_LED1=0ii=0

                                                    elseREady_LED1=0

                                                    START_LED1=1

                                                    else

                                                    START_LED1=0

                                                    k1=1 buzzer=0

                                                    REady_LED1=0 flag1=0

                                                    flag5=0flag6=0

                                                    condition for switch2

                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                    REady_LED2=1 turn on ready 2 led indication

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    disp2=0

                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                    if(jltk)

                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                    elseREady_LED2=0

                                                    START_LED2=1

                                                    else START_LED2=0

                                                    REady_LED2=0 k2=1 buzzer=0

                                                    flag2=0flag7=0flag8=0

                                                    j=0jj=0

                                                    condition for switch 3

                                                    if(flag3==1) check swich3 pressed

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    if(disp3==1 )

                                                    REady_LED3=1 disp3=0

                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                    if(lltk)

                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                    elseREady_LED3=0

                                                    START_LED3=1

                                                    else START_LED3=0

                                                    LED2=0 k3=1 buzzer=0

                                                    REady_LED3=0 flag3=0

                                                    flag9=0flag10=0

                                                    l=0ll=0

                                                    condition for switch 4

                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    REady_LED4=1 disp4=0

                                                    if(flag11==1) check coin is pressed

                                                    if(flag12==1) START is pressed

                                                    if(mltk)

                                                    if(mgt1000)

                                                    buzzer=1 if(mm==20)

                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                    elseREady_LED4=0

                                                    START_LED4=1

                                                    else START_LED4=0

                                                    buzzer=0 k4=1

                                                    REady_LED4=0 flag4=0

                                                    flag11=0flag12=0

                                                    m=0mm=0

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    while(1)

                                                    end of main programme

                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                    whenever specific time the interrupt will generate control will go in following function

                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if(sw1_op==0 ) ready switch flag for system1

                                                    my_delay(10) CALL DELAY FUNCTION

                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                    if(flag7==1) SET THE FLAG

                                                    flag7=1

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                    flag9=1

                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                    flag11=1

                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if(sw2_op==0 ) fready switch flag for system2

                                                    my_delay (10)

                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                    if(flag5==1)

                                                    flag5=1

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                    flag9=1

                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                    flag11=1

                                                    elseflag11=0flag4=0REady_LED4=0

                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                    if(flag7==1)

                                                    flag7=1

                                                    else

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                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                    flag5=1

                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                    flag11=1

                                                    elseflag11=0flag4=0REady_LED4=0

                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                    if(flag7==1)

                                                    flag7=1

                                                    elseflag7=0

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                    flag5=1

                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                    flag9=1

                                                    elseflag9=0flag3=0REady_LED3=0

                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                    if(flag6==1)

                                                    i++ if (igt1000) ii++

                                                    if (flag8==1)

                                                    j++ if(jgt1000) jj++

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    if (flag10==1)

                                                    l++ if (lgt1000) ll++

                                                    if (flag12==1)

                                                    m++ if (mgt1000) mm++

                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 13

                                                    TROUBLE SHOOT

                                                    Troubleshoot

                                                    131 TROUBLE SHOOT

                                                    A newly assembled circuit does not work may be due to -

                                                    Faulty components

                                                    Improper soldering

                                                    Wrong connections

                                                    Also any stop in working after some period may be due to -

                                                    Component failure

                                                    Supply failure

                                                    Damaging of PCB

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Fault finding is very essential if you want the circuit to operate properly

                                                    If a newly assembled circuit is not working properly check all the components and

                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                    proper soldering

                                                    If faults are not observed during physical observations one should proceed for Hot

                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                    Resistance measurement is also done which is known as Dry test

                                                    During this project work some green LEDs was not glow then we checked it

                                                    continuity and replace it

                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                    heated after starting the project It happens because of some soldering points are shorted

                                                    during soldering PCB We solved that problem

                                                    CHAPTER 14

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    ADVANTAGES OF

                                                    THE PROJECT

                                                    Advantages

                                                    141 ADVANTAGES OF THE PROJECT

                                                    Simple and hand efficient Microcontroller based system

                                                    Fast charging capacity

                                                    Simple to operate

                                                    Ease of mobility

                                                    Facilitates connectivity for 90 of cellular phones

                                                    Less expensive

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Reduced man power

                                                    Low power consumption

                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                    CHAPTER 15

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    DISADVANTAGES

                                                    OF THE PROJECT

                                                    Disadvantages

                                                    151 DISADVANTAGES OF THE PROJECT

                                                    It requires mains supply to work project

                                                    Due to limited charging channels till now there may be a possibility that

                                                    mobile phones of few brands cannot be connected for charging For this

                                                    purpose we have to use separate connectors for that specific brand differently

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                    min

                                                    It does not have battery backup therefore it cannot be portable

                                                    CHAPTER 16

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    APPLICATIONS OF

                                                    THE PROJECT

                                                    Application

                                                    161 APPLICATIONS OF THE PROJECT

                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                    charge for the mobile phone in any places

                                                    It is used for emergency charging purposes

                                                    It can be installed in malls railway stations bus stops and other public

                                                    places

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    The charger offers a unique revenue opportunity for a vast range of

                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                    any location where there is a high footfall creating a large number of

                                                    potential users

                                                    It can be installed in offices and collages for pay charging facility

                                                    CHAPTER 17

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    FUTURE

                                                    DEVELOPMENT OF

                                                    THE PROJECT

                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                    This project is very useful to people who are using mobile phone without charging

                                                    condition in public places

                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                    It will provide battery backup for make it portable

                                                    It will also provide SMS system in future

                                                    We can also increase the charging time by editing software of the project

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 18

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    COST ANALYSIS

                                                    OF THE PROJECT

                                                    COST ANALYSIS OF THE PROJECT

                                                    181 COST ANALYSIS OF THE PROJECT

                                                    1811 Component list for power supply card

                                                    Footprint Quantity Designators Rate

                                                    Resistor

                                                    22K 1 R2 1

                                                    1K 1 R1 1

                                                    Capacitor

                                                    1000uf25V 1 C5 10

                                                    2200uf25V 1 C1 10

                                                    022uf 2 C6 C2 1

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                    Table 1811 Component list for power supply card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    01uf 2 C4 C3 1

                                                    IC

                                                    BRIDGE W10 2 BR2 BR1 10

                                                    L7812CV (TO-220) 1 U2 8

                                                    L7805CV (TO-220) 1 U1 8

                                                    Connector

                                                    CON PHO 2PIN 2 J3 J2 16

                                                    CON PHO 3PIN 1 J1 12

                                                    LED3mm red 2 L1 L2 15

                                                    Heat sink (TO-220) 2 16

                                                    Total 955

                                                    1812 Component list for battery charger card

                                                    Footprint Quantity Rate

                                                    Capacitor

                                                    2200uf25V 1 1000

                                                    022uf 4 100

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    01uf 4 100

                                                    IC

                                                    BRIDGE W10 1 500

                                                    L7805CV (TO-220) 4 3200

                                                    Connector

                                                    CON PHO 2PIN 1 800

                                                    Relimate 2 pin 1 400

                                                    relimate 3 pin 4 2000

                                                    Heat sink (TO-220) 4 1200

                                                    TOTAL 9300

                                                    1813 Component list for Relay card

                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                    Table 1812Component list for battery charger card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                    Total 18900

                                                    1814Component list for controller card

                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                    Table 1813Component list for relay card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                    total 27000

                                                    1815 Miscellaneous material

                                                    Material Quantity Rate

                                                    electronic item

                                                    Transformer

                                                    TXR1 0-9-15 1 20000

                                                    0-9 1A

                                                    0-15 100mA

                                                    TXR2 0-9 1 16500

                                                    0-9 1A

                                                    Proximity switch 1 20000

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                    Table 1814Component list for microcontroller card

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Red push bottom 4 4000

                                                    Green push button 1 1000

                                                    Red led 5mm 4 800

                                                    Green led 5mm 4 800

                                                    Led holder 8 1600

                                                    Copper clad 2 4000

                                                    3 core cable 1 meter 1500

                                                    3 pin plug 1 3000

                                                    2 pin relimate wire 19 9000

                                                    3 pin relimate wire 5 3750

                                                    4 pin relimate wire 2 2000

                                                    mechanical items

                                                    Enclosure 1 25000

                                                    Acrylic sheet 2 X 1 30000

                                                    12mm cable gland 1 1000

                                                    Screw 3mm 33 2000

                                                    Screw 35mm 6 2400

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    10 mm spacers 100 1500

                                                    10mm insert to stud 50 10000

                                                    cable tie 2500

                                                    Total 162350

                                                    CHAPTER 19

                                                    APPENDIX

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                    Table 1815Component list for miscellaneous material

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    APPENDIX

                                                    191 APPENDIX

                                                    1911 78xx IC datasheet

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1912 W10 datasheet

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1913 4n33 IC datasheet

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                    1914 MAX 232

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1915 ULN2003a IC datasheet

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    1916 89V51RD2 IC datasheet

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 20

                                                    CONCLUSION

                                                    CONCLUSION

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    201 CONCLUSION

                                                    The coin-operated mobile phone charger is already successfully installed in

                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                    installed in any business premises

                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                    a high footfall creating a large number of potential users

                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                    extend low mobile phone talk time provide battery charging

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 21

                                                    IMAGES OF THE

                                                    PROJECT

                                                    Images of the project

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    211 IMAGES OF THE PROJECT

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                    fig211 lsquoCoin operated mobile battery charger

                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Fig 216 Relay driver circuit

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                    Fig 213 Constant voltage battery charger circuit

                                                    Fig214 Power supply circuit

                                                    Fig215 Metal detector proximity switch

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Fig217 Microcontroller circuit

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    Fig228 coin operated mobile battery charger project presentation

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    CHAPTER 22

                                                    BIBILOGRAPHY

                                                    BIBLIOGRAPHY

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                    221 BIBLIOGRAPHY

                                                    BOOKS

                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                    INTERNET LINKS

                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                    • CHAPTER 1

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      711 WORKING

                                                      Resistors limit current Resistors are considered to be the most used and the most

                                                      important component of all the electronic circuits Resistors resist the flow of electrical

                                                      current The higher the value of resistance (measured in ohms)

                                                      the lower the current will be

                                                      712 TESTING

                                                      Read the indicated color code value then select the OHM-scale within but not way

                                                      below the indicated value A resistor is good if its resistance is close to the indicated

                                                      Tolerance should be considered with the ohmmeter reading While no resistance reading at

                                                      all on the ohmmeter scale settings the resistor is open A zero resistance reading on all

                                                      ohmmeter scale settings resistor is shorted

                                                      713 SPECIFICATIONS

                                                      To completely specify a resistors characteristics requires knowledge of the following

                                                      parameters-

                                                      bull Value

                                                      bull Tolerance

                                                      bull Temperature Coefficient

                                                      bull Power Rating

                                                      The specification of a resistor may be marked on its surface using either of two

                                                      systems of coding The first of these uses colored bands known as the rsquocolour codersquo and

                                                      the second more recent system uses a combination of alpha-numeric characters

                                                      7 2 CAPACITOR

                                                      721 WORKING

                                                      When DC voltage is applied to the capacitor an electric charge is stored on each

                                                      electrode While the capacitor is charging up current flows The current will stop flowing

                                                      when the capacitor has fully charged Capacitors find use

                                                      in circuits for a variety of purposes They are used in

                                                      time delay generation RC circuits In power supplies for filtering and power supply

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 27

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      decoupling as blocking capacitors for power factor correction and motor starting in LC

                                                      tank circuits and so on

                                                      722 TESTING

                                                      To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                                      negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                                      A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                                      and moves back again to infinite resistance position A defective indication for an

                                                      electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                                      which is an indication that the capacitor is shorted

                                                      73 LIGHT EMITING DIODE (LED)

                                                      731 WORKING

                                                      LEDs are special diodes that emit light when

                                                      connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                                      indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                                      the heart of an LED the semi-conductor chip

                                                      In our project Green LED are used here for mainly two purpose

                                                      a Charging ON indication (when ON)

                                                      b Channel fault indication (always OFF)

                                                      732 TESTING

                                                      The good and working LED will then light up or glow a busted LED will not LEDs

                                                      must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                                      1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                                      directly connected to a battery or power supply It will be destroyed the LED

                                                      733 FEATURES

                                                      Single color

                                                      High bright output

                                                      Low power consumption

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      High reliability and long life

                                                      734 Descriptions

                                                      Dice material GaInN

                                                      Emitting Color Super Bright White

                                                      Device Outlineφ5mm Round Type

                                                      Lens Type Water Clear

                                                      74 RELAY

                                                      741 WORKING

                                                      A relay is an electrically operated switch Current

                                                      flowing through the coil of the relay creates a magnetic field

                                                      which attracts a lever and changes the switch contacts The coil

                                                      current can be on or off so relays have two switch positions and

                                                      most have double throw (changeover) switch contacts

                                                      Relays are like remote control switches and are used in

                                                      many applications because of their relative simplicity long life

                                                      and proven high reliability

                                                      742 USES

                                                      The main operation of a relay comes in places where only a low-power signal can be

                                                      used to control a circuit

                                                      It is also used in places where only one signal can be used to control a lot of circuits

                                                      The application of relays started during the invention of telephones They played an

                                                      important role in switching calls in telephone exchanges They were also used in

                                                      long distance telegraphy They were used to switch the signal coming from one

                                                      source to another destination

                                                      743 TESTING

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      A relay will usually have a coil pole terminal and a set of

                                                      contacts The set of contacts that are open when the relay is not

                                                      energized are called normally open (NO) contacts and the set of

                                                      contacts that are closed when the relay is not energized are called

                                                      normally closed (NC) contacts The following steps can be used to perform the testing of

                                                      the relay using a multimeter

                                                      Keep the multimeter in the continuity check mode

                                                      Check for continuity between the NC contacts and pole

                                                      Check for discontinuity between NO contacts and the pole

                                                      Now energies the relay using the rated voltage For example use a 9V battery for

                                                      energizing a 9V relay The relay will engage with clicking sound

                                                      Now check for continuity between NO contacts and pole

                                                      Also check for discontinuity between NC contacts and pole

                                                      As a final test measure the resistance of the relay coil using a multimeter and check

                                                      whether it is matching to the value stated by the manufacturer

                                                      If all the above tests are positive we can conclude that the relay is healthy

                                                      75 TRANSFORMER

                                                      751 WORKING

                                                      A transformer is a device that transfers electrical energy

                                                      from one circuit to another through inductively coupled

                                                      electrical conductors A changing current in the first circuit (the

                                                      primary) creates a changing magnetic field

                                                      This changing magnetic field induces a changing voltage in the second circuit (the

                                                      secondary) This effect is called mutual induction

                                                      If a load is connected to the secondary circuit electric charge will flow in the

                                                      secondary winding of the transformer and transfer energy from the primary circuit to the

                                                      load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                      of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                      number of primary turns

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      By appropriate selection of the numbers of turns a transformer thus allows an

                                                      alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                      making it less

                                                      752 TESTING

                                                      1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                      scale and then adjusting the knob to verify its reading is an easy step to the

                                                      reading of the ohm

                                                      2 To check the resistance of the coil unplug or unsolder the leads of the

                                                      transformer from its circuit and measure the resistance of each coil

                                                      3 The next step is to test each coil for shorts to other coils

                                                      76 RECTIFIER BRIDGE (W 10)

                                                      761 WORKING

                                                      A diode bridge rectifier is a device for converting AC or

                                                      alternating current electricity into DC or direct current AC

                                                      electricity goes from positive to negative constantly whereas DC

                                                      always flows in the same direction

                                                      AC electricity is more efficient to transmit and easier to

                                                      convert into different voltages However most appliances need DC current to run A diode

                                                      bridge rectifier is the most common type of power supply used to provide this current In

                                                      our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                      77 OSCILLATOR

                                                      771 Working

                                                      An oscillator puts out an endless series of pulses The output

                                                      constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      all digital circuits have some type of oscillator This stream of output pulses is often

                                                      called a clock One of the most important features of any oscillator is its frequency stability

                                                      or in other words its ability to provide a constant frequency output under varying load

                                                      conditions Some of the factors that affect the frequency stability of an oscillator include

                                                      temperature variations in the load and changes in the DC power supply Frequency stability

                                                      of the output signal can be improved by the proper selection of the components used for the

                                                      resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                      be obtained from normal LC and RC tank circuits

                                                      In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                      divided to give you exact clock rates for most of the common baud rates for the UART

                                                      especially for the higher speeds (9600 19200) These crystals are readily available and

                                                      commonly used

                                                      78 SWITCH

                                                      781 WORKING

                                                      The most familiar form of switch is a manually operated

                                                      electromechanical device with one or more sets of electrical contacts

                                                      Each set of contacts can be in one of two states either closed meaning

                                                      the contacts are touching and electricity can flow between them or

                                                      open meaning the contacts are separated and the switch is non

                                                      conducting The mechanism actuating the transition between these two

                                                      states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                      momentary (push-for on or push-for off) type

                                                      782 USES

                                                      In electronics a switch is an electrical component that can break an electrical

                                                      circuit interrupting the current or diverting it from one conductor to another

                                                      783 TESTING

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                      no connection Switch can tested by using multimeter in continuity range

                                                      79 DARLINGTON PAIR IC (ULN2003a)

                                                      791 WORKING

                                                      The Darlington transistor (often called a Darlington pair) is a

                                                      compound structure consisting of two bipolar transistors (either

                                                      integrated or separated devices) connected in such a way that the

                                                      current amplified by the first transistor is amplified further by the

                                                      second one This configuration gives a much higher current gain than

                                                      each transistor taken separately and in the case of integrated devices

                                                      can take less space than two individual transistors because they can

                                                      use a shared collector

                                                      Integrated Darlington pairs come packaged singly in

                                                      transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                      The Darlington transistor array used is ULN2003 Applications include relay

                                                      drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                      drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                      to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                      for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                      792 FEATURES

                                                      The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                      transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                      with common-cathode clamp diodes for switching inductive loads The collector-current

                                                      rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                      higher current capability

                                                      710 SERIES VOLTAGE REGULATER IC (78XX)

                                                      7101 WORKING

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Voltage Regulator (regulator) usually having three legs converts varying input

                                                      voltage and produces a constant regulated output voltage They are available in a variety of

                                                      outputs

                                                      The most common part numbers start with the numbers 78 or 79 and finish with two

                                                      digits indicating the output voltage The number 78 represents positive voltage and 79

                                                      negative one The 78XX series of voltage regulators are designed for positive input

                                                      The LM78XX series typically has the ability to drive current up to 1A For

                                                      application requirements up to 150mA 78LXX can be used As mentioned above the

                                                      component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                      an output leg with the regulators voltage

                                                      As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                      voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                      difference between the input and output appears as heat If the input voltage is unnecessarily

                                                      high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                      sinking the regulator will shut down

                                                      711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                      7111 WORKING

                                                      The MAX-232 It includes a Charge Pump which generates

                                                      +10V and -10V from a single 5v supply

                                                      This IC also includes two receivers and two transmitters in

                                                      the same package This is handy in many cases when we only want to

                                                      use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                      receive line and one for the transmit There are also many variations of these devices The

                                                      large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                      available which use smaller capacitors and even some with inbuilt capacitors However the

                                                      MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                      Dual Charge-Pump Voltage Converter

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                      V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                      output

                                                      712 OPTOCOUPLER IC (4N33)

                                                      7121 WORKING

                                                      In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                      photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                      between elements of a circuit typically a transmitter and a receiver while keeping them

                                                      electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                      back to an electrical signal electrical contact along the path is broken

                                                      Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                      essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                      arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                      light-triggered diac The two are separated by a transparent barrier which blocks any

                                                      electrical current flow between the two but does allow the passage of light

                                                      The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                      silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                      of isolation between driving and load circuits These Optocouplers can be used to replace

                                                      reed and mercury relays with advantages of long life high speed switching and elimination

                                                      of magnetic field

                                                      713 MICROCONTROLLER IC (89V51 RD 2 )

                                                      713 WORKING

                                                      The P89V51RD2 is an 80C51 microcontroller with 64

                                                      kB Flash and 1024 bytes of data RAM

                                                      A key feature of the P89V51RD2 is its X2 mode option

                                                      The design engineer can choose to run the application with the conventional 80C51 clock

                                                      rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                      feature is to keep the same performance by reducing the clock frequency by half thus

                                                      dramatically reducing the EMI

                                                      The Flash program memory supports both parallel programming and in serial In-

                                                      System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                      speed reducing programming costs and time to market ISP allows a device to be

                                                      reprogrammed in the end product under software control The capability to fieldupdate the

                                                      application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                      In-Application Programmable (IAP) allowing the Flash program memory to be

                                                      reconfigured even while the application is running

                                                      714 RELIMATE CONNECTOR

                                                      7141 WORKING

                                                      These are wire to board type connectors used to facilitate

                                                      proper and firm electrical connection between the relay card and

                                                      microcontroller card

                                                      The connector has following specifications

                                                      No of Ways 2-20

                                                      Voltage Rating 250V AC DC

                                                      Current Rating 3A AC DC

                                                      Contact Resistance 20mW max

                                                      Insulation Resistance 1000MW min

                                                      Dielectric Withstanding 1000V ACminute

                                                      Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                      The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                      connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                      conflicts

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      715 RS-232 PORT CONNECTOR

                                                      7151 WORKING

                                                      Almost all digital devices which we use require either TTL

                                                      or CMOS logic levels Therefore the first step to connecting a

                                                      device to the RS-232 port is to transform the RS-232 levels back

                                                      into 0 and 5 Volts This is done by RS-232 Level Converters

                                                      Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                      Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                      The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                      problem in many instances where only a single supply of +5V is present

                                                      CHAPTER 8

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      IMPLIMENTATION

                                                      OF THE PCB

                                                      Components layout designing

                                                      Developing or Etching the PCB

                                                      Other operations like Drilling Cutting Tinning

                                                      81 IMPLIMENTATION OF THE PCB

                                                      A proper PCB ensure that various circuit components are interconnected as per the

                                                      circuit diagram once they have been placed on the PCB in their proper positions and

                                                      subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                      base material to which is permanently attached a flat metallic network of conducting path

                                                      whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                      for this project is single one

                                                      The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                      board configuration however is most widely used and it may be of the nature of the single

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                      which ensures adequate and permanent low resistance coupling

                                                      811 BOARD DESIGN

                                                      PCB designed is the most important and requires great care during work In this case

                                                      great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                      is designed it is virtually impossible to alter it While designing a circuit designer should

                                                      take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                      unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                      also help to solve this problem when circuit is complicated

                                                      812 THE MASTER DIAGRAM

                                                      The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                      which is commonly made twice as the finished circuit since this makes the working on that

                                                      much easier especially when circuit is complicated photography eventually reduces the

                                                      size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                      the designing -

                                                      a The space between the conductors must be strictly controlled to avoid the possibility

                                                      of electrical discharges or unwanted capacitance The amount by which the mater

                                                      diagram is to reduce in size is thus a critical deign feature

                                                      b The conductor must be wider in those part of the circuits that are going to handle

                                                      large current must be handle without undue temperature of conductors

                                                      c The minimum width of copper should not generally be less than about 15mmThis

                                                      is related to mechanical strength rather than electrical properties and it also ensure

                                                      that strips remains securely bounded to the base material

                                                      d The points where the component holes for component lead wire occurs must be sited

                                                      to suit the dimensions of the component and dimensions between lead-out wire so

                                                      that the components can be situated correctly on finished board The conductor is

                                                      also main large at the point of holes

                                                      813 PCB MAKING

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      When the mater diagram probable twice the size of real PCB has been evolved the

                                                      test major step consists of etching or dissolving the unwanted metal from copper claded

                                                      board to create a circuit as depicted by master diagram It must be stressed that very

                                                      accurate checking master is essential at this stage Then the master point is mounted on a

                                                      special frame on easy facing of a larger camera and with the aid of the very powerful

                                                      illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                      developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                      brought into operation This comprises the camera body mounted so that sideways after

                                                      each exposure In this way number of copies of the original master diagram is set out

                                                      exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                      In case of simple and need of number of less PCB economic and advisable to use the

                                                      following lab method of PCB making

                                                      Planning The Circuit

                                                      It is not a particular difficult There are several important factors that need not be

                                                      taken into account if the finished device is to work properly we must consider gain factor

                                                      and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                      possibility We must also ensure that conductors and components carrying high frequency

                                                      current are well separated from the part of the circuit We are also to make sure that all

                                                      components need to return to earth are properly connected and that possibility of common

                                                      impedance arising earth returned

                                                      Circuit is totally eliminated by making all earth as substantial possible consistent

                                                      with nature of design Other factors that have to successfully studied include availability of

                                                      adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                      made for mechanical fixing ventilation effect of vibration

                                                      Cleaning The Board

                                                      The copper side of the board must be thoroughly cleaned before circuit plan is

                                                      transferred to it This is important because even slightest trace of graze (from figure of

                                                      instance) will impure the etching process and when the circuit plan has been neatly

                                                      transferred to copper in this manner the board is held under running tap and the allowed to

                                                      dry before resist is applied

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Transforming the Plan

                                                      Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                      A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                      board and working plan and carefully trace the lines of original plan with a ball pen

                                                      Resist

                                                      Resist is nothing more than a substrate that is unaffected by presence etching

                                                      chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                      clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                      covered when resists the leaguer type of paints possess good resist properties but

                                                      disadvantage of relatively long time taken for drying It is essential to resist through

                                                      hardening before etching is started Nail polished are better as they quickly and are less

                                                      difficult to remove

                                                      To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                      PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                      short circulating due to paints are completely the avoid etching tapes and pads are available

                                                      in different sizes

                                                      Correcting Error

                                                      When a result has been thoroughly hardened any errors that have been made can

                                                      usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                      edges of copper conductors on board the resist must be applied with steady band

                                                      Etching

                                                      Next comes etching of unwanted copper amp whether a small single is all that is

                                                      required as quantity of board to be produce certain precautions must be taken before

                                                      operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                      quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                      etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                      grams of water

                                                      Agitation

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                      the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                      laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                      gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                      temperature and thickness of copper foil

                                                      Finishing Off

                                                      When all unwanted copper is dissolved from areas between conductor board should

                                                      be taken from an etchant amp washed in water The resist must be removed using proper

                                                      solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                      seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                      PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                      This process is called Tinning This process of coating involve track with soldier

                                                      Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                      ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                      Assembling On PCB

                                                      After the holes are drilled the component have to be assembled on PCB before

                                                      assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                      accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                      repetitive use cleans soldering iron

                                                      CHAPTER 9

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      SOLDERING

                                                      TECHNIQUE

                                                      Technique for good soldering

                                                      91 SOLDERING TECHNIQUE

                                                      For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                      oxide film or dirt on it If required flux is applied on the points to be soldered

                                                      Now the joint to be soldered is heated with the help of soldering iron Heat

                                                      applied should be such that when solder wire is touched to joint it must melt

                                                      quickly

                                                      The joint and the soldering iron is held such that molten solder should flow

                                                      smoothly over the joint

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      When joint is completely covered with molten solder the soldering iron is re-

                                                      moved

                                                      The joint is allowed to cool without any movement

                                                      The bright shining solder indicates good soldering

                                                      In case of dry solder joint a air gap remains in between the solder material and

                                                      the joint It means that soldering is improper This is removed and again solder-

                                                      ing is done

                                                      Thus this way all the components are soldered on P C B

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 10

                                                      PCB LAYOUTS

                                                      Schematic diagram

                                                      Bottom and top layout

                                                      101 POWER SUPPLY CARD

                                                      1011 SCHIMETIC DIAGRAM

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1012 LEGEND MARKING

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                      Fig1011 Schematic diagram of power supply card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1013TOP LAYER

                                                      1014 BOTTOM LAYER

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                      Fig1013 Top layer of power supply

                                                      card

                                                      Fig1014 Schematic diagram of power supply card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      102 BATTERY CHARGER CARD

                                                      1021 SCHEMATIC DIAGRAM

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                      Fig1021 Schematic diagram of battery charger card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      103 RELAY CARD

                                                      1031 SCHIMETIC DIAGRAM

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                      Fig1031 Schematic diagram of Relay card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1032 RELAY CARD LEGEND MARKING

                                                      1033 TOP LAYER

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                      Fig1032 Legend marking of Relay card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1034 BOTTOM LAYER

                                                      104 MICROCONTROLER CARD

                                                      1041 SCHIMETIC DIAGRAM

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                      Fig1034 Bottom layer of Relay card

                                                      Fig1041 Schematic diagram of microcontroller card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1042 ALL LAYERS

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                      Fig1042 All layer of microcontroller card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 11

                                                      INTRODUCTION

                                                      OF SOFTWARE

                                                      Keil (microVision 2)

                                                      Eagle (Easily Applicable Graphical Layout Editor)

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      111 Keil (microVision 2)

                                                      1111 Introduction to C51 Cross Compiler

                                                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                      generates object code that matches the efficiency and speed of assembly programming

                                                      Using a high-level language like C has many advantages over assembly language

                                                      programming

                                                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                      the memory structure of the 8051 CPU is desirable (but not necessary)

                                                      Details like register allocation and addressing of the various memory types and data

                                                      types is managed by the compiler

                                                      Programs get a formal structure (which is imposed by the C programming language) and

                                                      can be divided into separate functions This contributes to source code reusability as

                                                      well as better overall application structure

                                                      The ability to combine variable selection with specific operations improves program

                                                      readability

                                                      Keywords and operational functions that more nearly resemble the human thought

                                                      process may be used

                                                      Programming and program test time is drastically reduced

                                                      The C run-time library contains many standard routines such as formatted output

                                                      numeric conversions and floating-point arithmetic

                                                      Existing program parts can be more easily included into new programs because of

                                                      modular program construction techniques

                                                      The language C is a very portable language (based on the ANSI standard) that enjoys

                                                      wide popular support and is easily obtained for most systems Existing program

                                                      investments can be quickly adapted to other processors as needed

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1112 Software Development Cycle in Keil

                                                      When we use the Keil Software tools the

                                                      project development cycle is roughly the same as

                                                      it is for any other software development project

                                                      1 Create a project select the target chip from the

                                                      device database and configure the tool settings

                                                      2 Create source files in C or assembly

                                                      3 Build your application with the project

                                                      manager

                                                      4 Correct errors in source files

                                                      5 Test the linked application A block diagram of

                                                      the complete 8051 tool set may best illustrate the

                                                      development cycle

                                                      112 Eagle (Easily Applicable Graphical Layout Editor)

                                                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                      1121 Schematic Editor

                                                      In this one can develop amp design circuits for the required PCB

                                                      1122 Layout Editor

                                                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                      Fig 111 Software development in KEIL

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1123 Library Editor

                                                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                      1124 Auto Router

                                                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                      the PCB tracks designed

                                                      1125 Cam Processor

                                                      This is used to finally print the various layers of the designed PCB viz Top Layer

                                                      Bottom Layer Component Layer Masking Layer etc

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                      Start

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 12

                                                      INTRODUCTION

                                                      OF

                                                      PROGRAMMING

                                                      Flowchart of programming

                                                      Program code

                                                      121 Flowchart

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                      2

                                                      flag9==1

                                                      flag9=1

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                      flag11==1

                                                      flag11=1 flag11=0 flag4=0

                                                      REady_LED4=0

                                                      Sw2_op (P01) ==0

                                                      My delay (10)

                                                      3 3

                                                      flag2=1 disp2=1 k2=0

                                                      3

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                      4

                                                      flag11==1

                                                      flag11=0 flag4=0 REady_LED4=0

                                                      flag11=1

                                                      My delay (10)

                                                      flag3=1 disp3=1 k3=0

                                                      k1==0||k2==0||k4==0

                                                      Sw3_op (P02) ==0

                                                      5

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                      flag5==1

                                                      5

                                                      flag11==1

                                                      flag7=1

                                                      flag7==1

                                                      flag7=0 flag2=0 REady_LED2=0

                                                      6

                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                      flag11=0 flag4=0 REady_LED4=0

                                                      flag11=1

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                      6

                                                      My delay (10)

                                                      flag4=1 disp4=1 k4=0

                                                      k1==0||k2==0||k3==0 flag5==1

                                                      7

                                                      Sw4_op (P03) ==0

                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                      7

                                                      flag7==1

                                                      flag9==1

                                                      flag7=1

                                                      flag7=0 flag2=0 REady_LED2=0

                                                      flag9=0 flag3=0 REady_LED3=0

                                                      flag9=1

                                                      Sw5_op A(P04) ==0

                                                      My delay (10)

                                                      8

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                      9

                                                      flag2==1

                                                      flag3==1

                                                      8

                                                      flag1==1

                                                      flag4==1 flag5=1 disp5=1

                                                      flag9=1 disp5=1

                                                      flag7=1 disp5=1

                                                      flag11=1 disp5=1

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                      Sw6_op (P05) ==0

                                                      My delay (10)

                                                      flag2==1 ampamp flag7==1

                                                      flag3==1 ampamp flag9==1 9

                                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                      flag8=1 disp6=1

                                                      10

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                      10

                                                      flag4==1 ampamp flag11==1

                                                      flag10=1 disp6=1

                                                      flag12=1 disp6=1

                                                      flag8==1

                                                      flag10==1

                                                      11

                                                      flag6==1

                                                      i++

                                                      l++

                                                      j++

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                      flag12==1

                                                      M++

                                                      11

                                                      Stop

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      122 Program

                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                      define buzzerP2_0 buzzer indication

                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                      output Led for indication

                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                      function prototype declaration

                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                      void init_timer() timer 0 initialization function

                                                      variable declaration

                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      start of main programme

                                                      void main()

                                                      init_timer() call it timer initialization function

                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                      start of while loop

                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                      condition for switch1

                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                      if(iltk) loop will repeat for desired time of charging

                                                      if(igt=1000)

                                                      buzzer=1 turn on buzzer if (ii==20)

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      REady_LED1=1 turn on ready indication of led1

                                                      else if(ii==40)

                                                      REady_LED1=0ii=0

                                                      elseREady_LED1=0

                                                      START_LED1=1

                                                      else

                                                      START_LED1=0

                                                      k1=1 buzzer=0

                                                      REady_LED1=0 flag1=0

                                                      flag5=0flag6=0

                                                      condition for switch2

                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                      REady_LED2=1 turn on ready 2 led indication

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      disp2=0

                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                      if(jltk)

                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                      elseREady_LED2=0

                                                      START_LED2=1

                                                      else START_LED2=0

                                                      REady_LED2=0 k2=1 buzzer=0

                                                      flag2=0flag7=0flag8=0

                                                      j=0jj=0

                                                      condition for switch 3

                                                      if(flag3==1) check swich3 pressed

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      if(disp3==1 )

                                                      REady_LED3=1 disp3=0

                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                      if(lltk)

                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                      elseREady_LED3=0

                                                      START_LED3=1

                                                      else START_LED3=0

                                                      LED2=0 k3=1 buzzer=0

                                                      REady_LED3=0 flag3=0

                                                      flag9=0flag10=0

                                                      l=0ll=0

                                                      condition for switch 4

                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      REady_LED4=1 disp4=0

                                                      if(flag11==1) check coin is pressed

                                                      if(flag12==1) START is pressed

                                                      if(mltk)

                                                      if(mgt1000)

                                                      buzzer=1 if(mm==20)

                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                      elseREady_LED4=0

                                                      START_LED4=1

                                                      else START_LED4=0

                                                      buzzer=0 k4=1

                                                      REady_LED4=0 flag4=0

                                                      flag11=0flag12=0

                                                      m=0mm=0

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      while(1)

                                                      end of main programme

                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                      whenever specific time the interrupt will generate control will go in following function

                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if(sw1_op==0 ) ready switch flag for system1

                                                      my_delay(10) CALL DELAY FUNCTION

                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                      if(flag7==1) SET THE FLAG

                                                      flag7=1

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                      flag9=1

                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                      flag11=1

                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if(sw2_op==0 ) fready switch flag for system2

                                                      my_delay (10)

                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                      if(flag5==1)

                                                      flag5=1

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                      flag9=1

                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                      flag11=1

                                                      elseflag11=0flag4=0REady_LED4=0

                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                      if(flag7==1)

                                                      flag7=1

                                                      else

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                      flag5=1

                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                      flag11=1

                                                      elseflag11=0flag4=0REady_LED4=0

                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                      if(flag7==1)

                                                      flag7=1

                                                      elseflag7=0

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                      flag5=1

                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                      flag9=1

                                                      elseflag9=0flag3=0REady_LED3=0

                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                      if(flag6==1)

                                                      i++ if (igt1000) ii++

                                                      if (flag8==1)

                                                      j++ if(jgt1000) jj++

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      if (flag10==1)

                                                      l++ if (lgt1000) ll++

                                                      if (flag12==1)

                                                      m++ if (mgt1000) mm++

                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 13

                                                      TROUBLE SHOOT

                                                      Troubleshoot

                                                      131 TROUBLE SHOOT

                                                      A newly assembled circuit does not work may be due to -

                                                      Faulty components

                                                      Improper soldering

                                                      Wrong connections

                                                      Also any stop in working after some period may be due to -

                                                      Component failure

                                                      Supply failure

                                                      Damaging of PCB

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Fault finding is very essential if you want the circuit to operate properly

                                                      If a newly assembled circuit is not working properly check all the components and

                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                      proper soldering

                                                      If faults are not observed during physical observations one should proceed for Hot

                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                      Resistance measurement is also done which is known as Dry test

                                                      During this project work some green LEDs was not glow then we checked it

                                                      continuity and replace it

                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                      heated after starting the project It happens because of some soldering points are shorted

                                                      during soldering PCB We solved that problem

                                                      CHAPTER 14

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      ADVANTAGES OF

                                                      THE PROJECT

                                                      Advantages

                                                      141 ADVANTAGES OF THE PROJECT

                                                      Simple and hand efficient Microcontroller based system

                                                      Fast charging capacity

                                                      Simple to operate

                                                      Ease of mobility

                                                      Facilitates connectivity for 90 of cellular phones

                                                      Less expensive

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Reduced man power

                                                      Low power consumption

                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                      CHAPTER 15

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      DISADVANTAGES

                                                      OF THE PROJECT

                                                      Disadvantages

                                                      151 DISADVANTAGES OF THE PROJECT

                                                      It requires mains supply to work project

                                                      Due to limited charging channels till now there may be a possibility that

                                                      mobile phones of few brands cannot be connected for charging For this

                                                      purpose we have to use separate connectors for that specific brand differently

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                      min

                                                      It does not have battery backup therefore it cannot be portable

                                                      CHAPTER 16

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      APPLICATIONS OF

                                                      THE PROJECT

                                                      Application

                                                      161 APPLICATIONS OF THE PROJECT

                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                      charge for the mobile phone in any places

                                                      It is used for emergency charging purposes

                                                      It can be installed in malls railway stations bus stops and other public

                                                      places

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      The charger offers a unique revenue opportunity for a vast range of

                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                      any location where there is a high footfall creating a large number of

                                                      potential users

                                                      It can be installed in offices and collages for pay charging facility

                                                      CHAPTER 17

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      FUTURE

                                                      DEVELOPMENT OF

                                                      THE PROJECT

                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                      This project is very useful to people who are using mobile phone without charging

                                                      condition in public places

                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                      It will provide battery backup for make it portable

                                                      It will also provide SMS system in future

                                                      We can also increase the charging time by editing software of the project

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 18

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      COST ANALYSIS

                                                      OF THE PROJECT

                                                      COST ANALYSIS OF THE PROJECT

                                                      181 COST ANALYSIS OF THE PROJECT

                                                      1811 Component list for power supply card

                                                      Footprint Quantity Designators Rate

                                                      Resistor

                                                      22K 1 R2 1

                                                      1K 1 R1 1

                                                      Capacitor

                                                      1000uf25V 1 C5 10

                                                      2200uf25V 1 C1 10

                                                      022uf 2 C6 C2 1

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                      Table 1811 Component list for power supply card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      01uf 2 C4 C3 1

                                                      IC

                                                      BRIDGE W10 2 BR2 BR1 10

                                                      L7812CV (TO-220) 1 U2 8

                                                      L7805CV (TO-220) 1 U1 8

                                                      Connector

                                                      CON PHO 2PIN 2 J3 J2 16

                                                      CON PHO 3PIN 1 J1 12

                                                      LED3mm red 2 L1 L2 15

                                                      Heat sink (TO-220) 2 16

                                                      Total 955

                                                      1812 Component list for battery charger card

                                                      Footprint Quantity Rate

                                                      Capacitor

                                                      2200uf25V 1 1000

                                                      022uf 4 100

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      01uf 4 100

                                                      IC

                                                      BRIDGE W10 1 500

                                                      L7805CV (TO-220) 4 3200

                                                      Connector

                                                      CON PHO 2PIN 1 800

                                                      Relimate 2 pin 1 400

                                                      relimate 3 pin 4 2000

                                                      Heat sink (TO-220) 4 1200

                                                      TOTAL 9300

                                                      1813 Component list for Relay card

                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                      Table 1812Component list for battery charger card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                      Total 18900

                                                      1814Component list for controller card

                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                      Table 1813Component list for relay card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                      total 27000

                                                      1815 Miscellaneous material

                                                      Material Quantity Rate

                                                      electronic item

                                                      Transformer

                                                      TXR1 0-9-15 1 20000

                                                      0-9 1A

                                                      0-15 100mA

                                                      TXR2 0-9 1 16500

                                                      0-9 1A

                                                      Proximity switch 1 20000

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                      Table 1814Component list for microcontroller card

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Red push bottom 4 4000

                                                      Green push button 1 1000

                                                      Red led 5mm 4 800

                                                      Green led 5mm 4 800

                                                      Led holder 8 1600

                                                      Copper clad 2 4000

                                                      3 core cable 1 meter 1500

                                                      3 pin plug 1 3000

                                                      2 pin relimate wire 19 9000

                                                      3 pin relimate wire 5 3750

                                                      4 pin relimate wire 2 2000

                                                      mechanical items

                                                      Enclosure 1 25000

                                                      Acrylic sheet 2 X 1 30000

                                                      12mm cable gland 1 1000

                                                      Screw 3mm 33 2000

                                                      Screw 35mm 6 2400

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      10 mm spacers 100 1500

                                                      10mm insert to stud 50 10000

                                                      cable tie 2500

                                                      Total 162350

                                                      CHAPTER 19

                                                      APPENDIX

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                      Table 1815Component list for miscellaneous material

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      APPENDIX

                                                      191 APPENDIX

                                                      1911 78xx IC datasheet

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1912 W10 datasheet

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1913 4n33 IC datasheet

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                      1914 MAX 232

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1915 ULN2003a IC datasheet

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      1916 89V51RD2 IC datasheet

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 20

                                                      CONCLUSION

                                                      CONCLUSION

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      201 CONCLUSION

                                                      The coin-operated mobile phone charger is already successfully installed in

                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                      installed in any business premises

                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                      a high footfall creating a large number of potential users

                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                      extend low mobile phone talk time provide battery charging

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 21

                                                      IMAGES OF THE

                                                      PROJECT

                                                      Images of the project

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                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      211 IMAGES OF THE PROJECT

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                      fig211 lsquoCoin operated mobile battery charger

                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Fig 216 Relay driver circuit

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                      Fig 213 Constant voltage battery charger circuit

                                                      Fig214 Power supply circuit

                                                      Fig215 Metal detector proximity switch

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Fig217 Microcontroller circuit

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      Fig228 coin operated mobile battery charger project presentation

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      CHAPTER 22

                                                      BIBILOGRAPHY

                                                      BIBLIOGRAPHY

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                      221 BIBLIOGRAPHY

                                                      BOOKS

                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                      INTERNET LINKS

                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                      • CHAPTER 1

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        decoupling as blocking capacitors for power factor correction and motor starting in LC

                                                        tank circuits and so on

                                                        722 TESTING

                                                        To test a capacitor set the multi-tester to Rx 10 or Rx1K scale Connect the tester

                                                        negative probe to the capacitor positive terminal the positive probe to the negative terminal

                                                        A good indication for electrolytic capacitor shows the meter needle deflecting towards zero

                                                        and moves back again to infinite resistance position A defective indication for an

                                                        electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point

                                                        which is an indication that the capacitor is shorted

                                                        73 LIGHT EMITING DIODE (LED)

                                                        731 WORKING

                                                        LEDs are special diodes that emit light when

                                                        connected in a circuit They are frequently used as pilot lights in electronic appliances to

                                                        indicate whether the circuit is closed or not A clear (or often colored) epoxy case enclosed

                                                        the heart of an LED the semi-conductor chip

                                                        In our project Green LED are used here for mainly two purpose

                                                        a Charging ON indication (when ON)

                                                        b Channel fault indication (always OFF)

                                                        732 TESTING

                                                        The good and working LED will then light up or glow a busted LED will not LEDs

                                                        must have a resistor in series to limit the current to a safe value for quick testing purposes a

                                                        1k resistor is suitable for most LEDs if your supply voltage is 12V or less LED cannot be

                                                        directly connected to a battery or power supply It will be destroyed the LED

                                                        733 FEATURES

                                                        Single color

                                                        High bright output

                                                        Low power consumption

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 28

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        High reliability and long life

                                                        734 Descriptions

                                                        Dice material GaInN

                                                        Emitting Color Super Bright White

                                                        Device Outlineφ5mm Round Type

                                                        Lens Type Water Clear

                                                        74 RELAY

                                                        741 WORKING

                                                        A relay is an electrically operated switch Current

                                                        flowing through the coil of the relay creates a magnetic field

                                                        which attracts a lever and changes the switch contacts The coil

                                                        current can be on or off so relays have two switch positions and

                                                        most have double throw (changeover) switch contacts

                                                        Relays are like remote control switches and are used in

                                                        many applications because of their relative simplicity long life

                                                        and proven high reliability

                                                        742 USES

                                                        The main operation of a relay comes in places where only a low-power signal can be

                                                        used to control a circuit

                                                        It is also used in places where only one signal can be used to control a lot of circuits

                                                        The application of relays started during the invention of telephones They played an

                                                        important role in switching calls in telephone exchanges They were also used in

                                                        long distance telegraphy They were used to switch the signal coming from one

                                                        source to another destination

                                                        743 TESTING

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        A relay will usually have a coil pole terminal and a set of

                                                        contacts The set of contacts that are open when the relay is not

                                                        energized are called normally open (NO) contacts and the set of

                                                        contacts that are closed when the relay is not energized are called

                                                        normally closed (NC) contacts The following steps can be used to perform the testing of

                                                        the relay using a multimeter

                                                        Keep the multimeter in the continuity check mode

                                                        Check for continuity between the NC contacts and pole

                                                        Check for discontinuity between NO contacts and the pole

                                                        Now energies the relay using the rated voltage For example use a 9V battery for

                                                        energizing a 9V relay The relay will engage with clicking sound

                                                        Now check for continuity between NO contacts and pole

                                                        Also check for discontinuity between NC contacts and pole

                                                        As a final test measure the resistance of the relay coil using a multimeter and check

                                                        whether it is matching to the value stated by the manufacturer

                                                        If all the above tests are positive we can conclude that the relay is healthy

                                                        75 TRANSFORMER

                                                        751 WORKING

                                                        A transformer is a device that transfers electrical energy

                                                        from one circuit to another through inductively coupled

                                                        electrical conductors A changing current in the first circuit (the

                                                        primary) creates a changing magnetic field

                                                        This changing magnetic field induces a changing voltage in the second circuit (the

                                                        secondary) This effect is called mutual induction

                                                        If a load is connected to the secondary circuit electric charge will flow in the

                                                        secondary winding of the transformer and transfer energy from the primary circuit to the

                                                        load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                        of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                        number of primary turns

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        By appropriate selection of the numbers of turns a transformer thus allows an

                                                        alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                        making it less

                                                        752 TESTING

                                                        1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                        scale and then adjusting the knob to verify its reading is an easy step to the

                                                        reading of the ohm

                                                        2 To check the resistance of the coil unplug or unsolder the leads of the

                                                        transformer from its circuit and measure the resistance of each coil

                                                        3 The next step is to test each coil for shorts to other coils

                                                        76 RECTIFIER BRIDGE (W 10)

                                                        761 WORKING

                                                        A diode bridge rectifier is a device for converting AC or

                                                        alternating current electricity into DC or direct current AC

                                                        electricity goes from positive to negative constantly whereas DC

                                                        always flows in the same direction

                                                        AC electricity is more efficient to transmit and easier to

                                                        convert into different voltages However most appliances need DC current to run A diode

                                                        bridge rectifier is the most common type of power supply used to provide this current In

                                                        our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                        77 OSCILLATOR

                                                        771 Working

                                                        An oscillator puts out an endless series of pulses The output

                                                        constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        all digital circuits have some type of oscillator This stream of output pulses is often

                                                        called a clock One of the most important features of any oscillator is its frequency stability

                                                        or in other words its ability to provide a constant frequency output under varying load

                                                        conditions Some of the factors that affect the frequency stability of an oscillator include

                                                        temperature variations in the load and changes in the DC power supply Frequency stability

                                                        of the output signal can be improved by the proper selection of the components used for the

                                                        resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                        be obtained from normal LC and RC tank circuits

                                                        In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                        divided to give you exact clock rates for most of the common baud rates for the UART

                                                        especially for the higher speeds (9600 19200) These crystals are readily available and

                                                        commonly used

                                                        78 SWITCH

                                                        781 WORKING

                                                        The most familiar form of switch is a manually operated

                                                        electromechanical device with one or more sets of electrical contacts

                                                        Each set of contacts can be in one of two states either closed meaning

                                                        the contacts are touching and electricity can flow between them or

                                                        open meaning the contacts are separated and the switch is non

                                                        conducting The mechanism actuating the transition between these two

                                                        states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                        momentary (push-for on or push-for off) type

                                                        782 USES

                                                        In electronics a switch is an electrical component that can break an electrical

                                                        circuit interrupting the current or diverting it from one conductor to another

                                                        783 TESTING

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                        no connection Switch can tested by using multimeter in continuity range

                                                        79 DARLINGTON PAIR IC (ULN2003a)

                                                        791 WORKING

                                                        The Darlington transistor (often called a Darlington pair) is a

                                                        compound structure consisting of two bipolar transistors (either

                                                        integrated or separated devices) connected in such a way that the

                                                        current amplified by the first transistor is amplified further by the

                                                        second one This configuration gives a much higher current gain than

                                                        each transistor taken separately and in the case of integrated devices

                                                        can take less space than two individual transistors because they can

                                                        use a shared collector

                                                        Integrated Darlington pairs come packaged singly in

                                                        transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                        The Darlington transistor array used is ULN2003 Applications include relay

                                                        drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                        drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                        to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                        for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                        792 FEATURES

                                                        The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                        transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                        with common-cathode clamp diodes for switching inductive loads The collector-current

                                                        rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                        higher current capability

                                                        710 SERIES VOLTAGE REGULATER IC (78XX)

                                                        7101 WORKING

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Voltage Regulator (regulator) usually having three legs converts varying input

                                                        voltage and produces a constant regulated output voltage They are available in a variety of

                                                        outputs

                                                        The most common part numbers start with the numbers 78 or 79 and finish with two

                                                        digits indicating the output voltage The number 78 represents positive voltage and 79

                                                        negative one The 78XX series of voltage regulators are designed for positive input

                                                        The LM78XX series typically has the ability to drive current up to 1A For

                                                        application requirements up to 150mA 78LXX can be used As mentioned above the

                                                        component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                        an output leg with the regulators voltage

                                                        As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                        voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                        difference between the input and output appears as heat If the input voltage is unnecessarily

                                                        high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                        sinking the regulator will shut down

                                                        711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                        7111 WORKING

                                                        The MAX-232 It includes a Charge Pump which generates

                                                        +10V and -10V from a single 5v supply

                                                        This IC also includes two receivers and two transmitters in

                                                        the same package This is handy in many cases when we only want to

                                                        use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                        receive line and one for the transmit There are also many variations of these devices The

                                                        large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                        available which use smaller capacitors and even some with inbuilt capacitors However the

                                                        MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                        Dual Charge-Pump Voltage Converter

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                        V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                        output

                                                        712 OPTOCOUPLER IC (4N33)

                                                        7121 WORKING

                                                        In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                        photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                        between elements of a circuit typically a transmitter and a receiver while keeping them

                                                        electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                        back to an electrical signal electrical contact along the path is broken

                                                        Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                        essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                        arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                        light-triggered diac The two are separated by a transparent barrier which blocks any

                                                        electrical current flow between the two but does allow the passage of light

                                                        The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                        silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                        of isolation between driving and load circuits These Optocouplers can be used to replace

                                                        reed and mercury relays with advantages of long life high speed switching and elimination

                                                        of magnetic field

                                                        713 MICROCONTROLLER IC (89V51 RD 2 )

                                                        713 WORKING

                                                        The P89V51RD2 is an 80C51 microcontroller with 64

                                                        kB Flash and 1024 bytes of data RAM

                                                        A key feature of the P89V51RD2 is its X2 mode option

                                                        The design engineer can choose to run the application with the conventional 80C51 clock

                                                        rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                        feature is to keep the same performance by reducing the clock frequency by half thus

                                                        dramatically reducing the EMI

                                                        The Flash program memory supports both parallel programming and in serial In-

                                                        System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                        speed reducing programming costs and time to market ISP allows a device to be

                                                        reprogrammed in the end product under software control The capability to fieldupdate the

                                                        application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                        In-Application Programmable (IAP) allowing the Flash program memory to be

                                                        reconfigured even while the application is running

                                                        714 RELIMATE CONNECTOR

                                                        7141 WORKING

                                                        These are wire to board type connectors used to facilitate

                                                        proper and firm electrical connection between the relay card and

                                                        microcontroller card

                                                        The connector has following specifications

                                                        No of Ways 2-20

                                                        Voltage Rating 250V AC DC

                                                        Current Rating 3A AC DC

                                                        Contact Resistance 20mW max

                                                        Insulation Resistance 1000MW min

                                                        Dielectric Withstanding 1000V ACminute

                                                        Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                        The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                        connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                        conflicts

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        715 RS-232 PORT CONNECTOR

                                                        7151 WORKING

                                                        Almost all digital devices which we use require either TTL

                                                        or CMOS logic levels Therefore the first step to connecting a

                                                        device to the RS-232 port is to transform the RS-232 levels back

                                                        into 0 and 5 Volts This is done by RS-232 Level Converters

                                                        Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                        Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                        The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                        problem in many instances where only a single supply of +5V is present

                                                        CHAPTER 8

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        IMPLIMENTATION

                                                        OF THE PCB

                                                        Components layout designing

                                                        Developing or Etching the PCB

                                                        Other operations like Drilling Cutting Tinning

                                                        81 IMPLIMENTATION OF THE PCB

                                                        A proper PCB ensure that various circuit components are interconnected as per the

                                                        circuit diagram once they have been placed on the PCB in their proper positions and

                                                        subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                        base material to which is permanently attached a flat metallic network of conducting path

                                                        whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                        for this project is single one

                                                        The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                        board configuration however is most widely used and it may be of the nature of the single

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                        which ensures adequate and permanent low resistance coupling

                                                        811 BOARD DESIGN

                                                        PCB designed is the most important and requires great care during work In this case

                                                        great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                        is designed it is virtually impossible to alter it While designing a circuit designer should

                                                        take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                        unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                        also help to solve this problem when circuit is complicated

                                                        812 THE MASTER DIAGRAM

                                                        The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                        which is commonly made twice as the finished circuit since this makes the working on that

                                                        much easier especially when circuit is complicated photography eventually reduces the

                                                        size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                        the designing -

                                                        a The space between the conductors must be strictly controlled to avoid the possibility

                                                        of electrical discharges or unwanted capacitance The amount by which the mater

                                                        diagram is to reduce in size is thus a critical deign feature

                                                        b The conductor must be wider in those part of the circuits that are going to handle

                                                        large current must be handle without undue temperature of conductors

                                                        c The minimum width of copper should not generally be less than about 15mmThis

                                                        is related to mechanical strength rather than electrical properties and it also ensure

                                                        that strips remains securely bounded to the base material

                                                        d The points where the component holes for component lead wire occurs must be sited

                                                        to suit the dimensions of the component and dimensions between lead-out wire so

                                                        that the components can be situated correctly on finished board The conductor is

                                                        also main large at the point of holes

                                                        813 PCB MAKING

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        When the mater diagram probable twice the size of real PCB has been evolved the

                                                        test major step consists of etching or dissolving the unwanted metal from copper claded

                                                        board to create a circuit as depicted by master diagram It must be stressed that very

                                                        accurate checking master is essential at this stage Then the master point is mounted on a

                                                        special frame on easy facing of a larger camera and with the aid of the very powerful

                                                        illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                        developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                        brought into operation This comprises the camera body mounted so that sideways after

                                                        each exposure In this way number of copies of the original master diagram is set out

                                                        exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                        In case of simple and need of number of less PCB economic and advisable to use the

                                                        following lab method of PCB making

                                                        Planning The Circuit

                                                        It is not a particular difficult There are several important factors that need not be

                                                        taken into account if the finished device is to work properly we must consider gain factor

                                                        and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                        possibility We must also ensure that conductors and components carrying high frequency

                                                        current are well separated from the part of the circuit We are also to make sure that all

                                                        components need to return to earth are properly connected and that possibility of common

                                                        impedance arising earth returned

                                                        Circuit is totally eliminated by making all earth as substantial possible consistent

                                                        with nature of design Other factors that have to successfully studied include availability of

                                                        adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                        made for mechanical fixing ventilation effect of vibration

                                                        Cleaning The Board

                                                        The copper side of the board must be thoroughly cleaned before circuit plan is

                                                        transferred to it This is important because even slightest trace of graze (from figure of

                                                        instance) will impure the etching process and when the circuit plan has been neatly

                                                        transferred to copper in this manner the board is held under running tap and the allowed to

                                                        dry before resist is applied

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Transforming the Plan

                                                        Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                        A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                        board and working plan and carefully trace the lines of original plan with a ball pen

                                                        Resist

                                                        Resist is nothing more than a substrate that is unaffected by presence etching

                                                        chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                        clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                        covered when resists the leaguer type of paints possess good resist properties but

                                                        disadvantage of relatively long time taken for drying It is essential to resist through

                                                        hardening before etching is started Nail polished are better as they quickly and are less

                                                        difficult to remove

                                                        To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                        PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                        short circulating due to paints are completely the avoid etching tapes and pads are available

                                                        in different sizes

                                                        Correcting Error

                                                        When a result has been thoroughly hardened any errors that have been made can

                                                        usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                        edges of copper conductors on board the resist must be applied with steady band

                                                        Etching

                                                        Next comes etching of unwanted copper amp whether a small single is all that is

                                                        required as quantity of board to be produce certain precautions must be taken before

                                                        operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                        quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                        etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                        grams of water

                                                        Agitation

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                        the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                        laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                        gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                        temperature and thickness of copper foil

                                                        Finishing Off

                                                        When all unwanted copper is dissolved from areas between conductor board should

                                                        be taken from an etchant amp washed in water The resist must be removed using proper

                                                        solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                        seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                        PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                        This process is called Tinning This process of coating involve track with soldier

                                                        Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                        ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                        Assembling On PCB

                                                        After the holes are drilled the component have to be assembled on PCB before

                                                        assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                        accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                        repetitive use cleans soldering iron

                                                        CHAPTER 9

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        SOLDERING

                                                        TECHNIQUE

                                                        Technique for good soldering

                                                        91 SOLDERING TECHNIQUE

                                                        For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                        oxide film or dirt on it If required flux is applied on the points to be soldered

                                                        Now the joint to be soldered is heated with the help of soldering iron Heat

                                                        applied should be such that when solder wire is touched to joint it must melt

                                                        quickly

                                                        The joint and the soldering iron is held such that molten solder should flow

                                                        smoothly over the joint

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        When joint is completely covered with molten solder the soldering iron is re-

                                                        moved

                                                        The joint is allowed to cool without any movement

                                                        The bright shining solder indicates good soldering

                                                        In case of dry solder joint a air gap remains in between the solder material and

                                                        the joint It means that soldering is improper This is removed and again solder-

                                                        ing is done

                                                        Thus this way all the components are soldered on P C B

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 10

                                                        PCB LAYOUTS

                                                        Schematic diagram

                                                        Bottom and top layout

                                                        101 POWER SUPPLY CARD

                                                        1011 SCHIMETIC DIAGRAM

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1012 LEGEND MARKING

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                        Fig1011 Schematic diagram of power supply card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1013TOP LAYER

                                                        1014 BOTTOM LAYER

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                        Fig1013 Top layer of power supply

                                                        card

                                                        Fig1014 Schematic diagram of power supply card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        102 BATTERY CHARGER CARD

                                                        1021 SCHEMATIC DIAGRAM

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                        Fig1021 Schematic diagram of battery charger card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        103 RELAY CARD

                                                        1031 SCHIMETIC DIAGRAM

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                        Fig1031 Schematic diagram of Relay card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1032 RELAY CARD LEGEND MARKING

                                                        1033 TOP LAYER

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                        Fig1032 Legend marking of Relay card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1034 BOTTOM LAYER

                                                        104 MICROCONTROLER CARD

                                                        1041 SCHIMETIC DIAGRAM

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                        Fig1034 Bottom layer of Relay card

                                                        Fig1041 Schematic diagram of microcontroller card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1042 ALL LAYERS

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                        Fig1042 All layer of microcontroller card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 11

                                                        INTRODUCTION

                                                        OF SOFTWARE

                                                        Keil (microVision 2)

                                                        Eagle (Easily Applicable Graphical Layout Editor)

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        111 Keil (microVision 2)

                                                        1111 Introduction to C51 Cross Compiler

                                                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                        generates object code that matches the efficiency and speed of assembly programming

                                                        Using a high-level language like C has many advantages over assembly language

                                                        programming

                                                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                        the memory structure of the 8051 CPU is desirable (but not necessary)

                                                        Details like register allocation and addressing of the various memory types and data

                                                        types is managed by the compiler

                                                        Programs get a formal structure (which is imposed by the C programming language) and

                                                        can be divided into separate functions This contributes to source code reusability as

                                                        well as better overall application structure

                                                        The ability to combine variable selection with specific operations improves program

                                                        readability

                                                        Keywords and operational functions that more nearly resemble the human thought

                                                        process may be used

                                                        Programming and program test time is drastically reduced

                                                        The C run-time library contains many standard routines such as formatted output

                                                        numeric conversions and floating-point arithmetic

                                                        Existing program parts can be more easily included into new programs because of

                                                        modular program construction techniques

                                                        The language C is a very portable language (based on the ANSI standard) that enjoys

                                                        wide popular support and is easily obtained for most systems Existing program

                                                        investments can be quickly adapted to other processors as needed

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1112 Software Development Cycle in Keil

                                                        When we use the Keil Software tools the

                                                        project development cycle is roughly the same as

                                                        it is for any other software development project

                                                        1 Create a project select the target chip from the

                                                        device database and configure the tool settings

                                                        2 Create source files in C or assembly

                                                        3 Build your application with the project

                                                        manager

                                                        4 Correct errors in source files

                                                        5 Test the linked application A block diagram of

                                                        the complete 8051 tool set may best illustrate the

                                                        development cycle

                                                        112 Eagle (Easily Applicable Graphical Layout Editor)

                                                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                        1121 Schematic Editor

                                                        In this one can develop amp design circuits for the required PCB

                                                        1122 Layout Editor

                                                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                        Fig 111 Software development in KEIL

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1123 Library Editor

                                                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                        1124 Auto Router

                                                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                        the PCB tracks designed

                                                        1125 Cam Processor

                                                        This is used to finally print the various layers of the designed PCB viz Top Layer

                                                        Bottom Layer Component Layer Masking Layer etc

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                        Start

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 12

                                                        INTRODUCTION

                                                        OF

                                                        PROGRAMMING

                                                        Flowchart of programming

                                                        Program code

                                                        121 Flowchart

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                        2

                                                        flag9==1

                                                        flag9=1

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                        flag11==1

                                                        flag11=1 flag11=0 flag4=0

                                                        REady_LED4=0

                                                        Sw2_op (P01) ==0

                                                        My delay (10)

                                                        3 3

                                                        flag2=1 disp2=1 k2=0

                                                        3

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                        4

                                                        flag11==1

                                                        flag11=0 flag4=0 REady_LED4=0

                                                        flag11=1

                                                        My delay (10)

                                                        flag3=1 disp3=1 k3=0

                                                        k1==0||k2==0||k4==0

                                                        Sw3_op (P02) ==0

                                                        5

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                        flag5==1

                                                        5

                                                        flag11==1

                                                        flag7=1

                                                        flag7==1

                                                        flag7=0 flag2=0 REady_LED2=0

                                                        6

                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                        flag11=0 flag4=0 REady_LED4=0

                                                        flag11=1

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                        6

                                                        My delay (10)

                                                        flag4=1 disp4=1 k4=0

                                                        k1==0||k2==0||k3==0 flag5==1

                                                        7

                                                        Sw4_op (P03) ==0

                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                        7

                                                        flag7==1

                                                        flag9==1

                                                        flag7=1

                                                        flag7=0 flag2=0 REady_LED2=0

                                                        flag9=0 flag3=0 REady_LED3=0

                                                        flag9=1

                                                        Sw5_op A(P04) ==0

                                                        My delay (10)

                                                        8

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                        9

                                                        flag2==1

                                                        flag3==1

                                                        8

                                                        flag1==1

                                                        flag4==1 flag5=1 disp5=1

                                                        flag9=1 disp5=1

                                                        flag7=1 disp5=1

                                                        flag11=1 disp5=1

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                        Sw6_op (P05) ==0

                                                        My delay (10)

                                                        flag2==1 ampamp flag7==1

                                                        flag3==1 ampamp flag9==1 9

                                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                        flag8=1 disp6=1

                                                        10

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                        10

                                                        flag4==1 ampamp flag11==1

                                                        flag10=1 disp6=1

                                                        flag12=1 disp6=1

                                                        flag8==1

                                                        flag10==1

                                                        11

                                                        flag6==1

                                                        i++

                                                        l++

                                                        j++

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                        flag12==1

                                                        M++

                                                        11

                                                        Stop

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        122 Program

                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                        define buzzerP2_0 buzzer indication

                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                        output Led for indication

                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                        function prototype declaration

                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                        void init_timer() timer 0 initialization function

                                                        variable declaration

                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        start of main programme

                                                        void main()

                                                        init_timer() call it timer initialization function

                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                        start of while loop

                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                        condition for switch1

                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                        if(iltk) loop will repeat for desired time of charging

                                                        if(igt=1000)

                                                        buzzer=1 turn on buzzer if (ii==20)

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        REady_LED1=1 turn on ready indication of led1

                                                        else if(ii==40)

                                                        REady_LED1=0ii=0

                                                        elseREady_LED1=0

                                                        START_LED1=1

                                                        else

                                                        START_LED1=0

                                                        k1=1 buzzer=0

                                                        REady_LED1=0 flag1=0

                                                        flag5=0flag6=0

                                                        condition for switch2

                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                        REady_LED2=1 turn on ready 2 led indication

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        disp2=0

                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                        if(jltk)

                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                        elseREady_LED2=0

                                                        START_LED2=1

                                                        else START_LED2=0

                                                        REady_LED2=0 k2=1 buzzer=0

                                                        flag2=0flag7=0flag8=0

                                                        j=0jj=0

                                                        condition for switch 3

                                                        if(flag3==1) check swich3 pressed

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        if(disp3==1 )

                                                        REady_LED3=1 disp3=0

                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                        if(lltk)

                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                        elseREady_LED3=0

                                                        START_LED3=1

                                                        else START_LED3=0

                                                        LED2=0 k3=1 buzzer=0

                                                        REady_LED3=0 flag3=0

                                                        flag9=0flag10=0

                                                        l=0ll=0

                                                        condition for switch 4

                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        REady_LED4=1 disp4=0

                                                        if(flag11==1) check coin is pressed

                                                        if(flag12==1) START is pressed

                                                        if(mltk)

                                                        if(mgt1000)

                                                        buzzer=1 if(mm==20)

                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                        elseREady_LED4=0

                                                        START_LED4=1

                                                        else START_LED4=0

                                                        buzzer=0 k4=1

                                                        REady_LED4=0 flag4=0

                                                        flag11=0flag12=0

                                                        m=0mm=0

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        while(1)

                                                        end of main programme

                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                        whenever specific time the interrupt will generate control will go in following function

                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if(sw1_op==0 ) ready switch flag for system1

                                                        my_delay(10) CALL DELAY FUNCTION

                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                        if(flag7==1) SET THE FLAG

                                                        flag7=1

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                        flag9=1

                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                        flag11=1

                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if(sw2_op==0 ) fready switch flag for system2

                                                        my_delay (10)

                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                        if(flag5==1)

                                                        flag5=1

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                        flag9=1

                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                        flag11=1

                                                        elseflag11=0flag4=0REady_LED4=0

                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                        if(flag7==1)

                                                        flag7=1

                                                        else

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                        flag5=1

                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                        flag11=1

                                                        elseflag11=0flag4=0REady_LED4=0

                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                        if(flag7==1)

                                                        flag7=1

                                                        elseflag7=0

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                        flag5=1

                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                        flag9=1

                                                        elseflag9=0flag3=0REady_LED3=0

                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                        if(flag6==1)

                                                        i++ if (igt1000) ii++

                                                        if (flag8==1)

                                                        j++ if(jgt1000) jj++

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        if (flag10==1)

                                                        l++ if (lgt1000) ll++

                                                        if (flag12==1)

                                                        m++ if (mgt1000) mm++

                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 13

                                                        TROUBLE SHOOT

                                                        Troubleshoot

                                                        131 TROUBLE SHOOT

                                                        A newly assembled circuit does not work may be due to -

                                                        Faulty components

                                                        Improper soldering

                                                        Wrong connections

                                                        Also any stop in working after some period may be due to -

                                                        Component failure

                                                        Supply failure

                                                        Damaging of PCB

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Fault finding is very essential if you want the circuit to operate properly

                                                        If a newly assembled circuit is not working properly check all the components and

                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                        proper soldering

                                                        If faults are not observed during physical observations one should proceed for Hot

                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                        Resistance measurement is also done which is known as Dry test

                                                        During this project work some green LEDs was not glow then we checked it

                                                        continuity and replace it

                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                        heated after starting the project It happens because of some soldering points are shorted

                                                        during soldering PCB We solved that problem

                                                        CHAPTER 14

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        ADVANTAGES OF

                                                        THE PROJECT

                                                        Advantages

                                                        141 ADVANTAGES OF THE PROJECT

                                                        Simple and hand efficient Microcontroller based system

                                                        Fast charging capacity

                                                        Simple to operate

                                                        Ease of mobility

                                                        Facilitates connectivity for 90 of cellular phones

                                                        Less expensive

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Reduced man power

                                                        Low power consumption

                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                        CHAPTER 15

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        DISADVANTAGES

                                                        OF THE PROJECT

                                                        Disadvantages

                                                        151 DISADVANTAGES OF THE PROJECT

                                                        It requires mains supply to work project

                                                        Due to limited charging channels till now there may be a possibility that

                                                        mobile phones of few brands cannot be connected for charging For this

                                                        purpose we have to use separate connectors for that specific brand differently

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                        min

                                                        It does not have battery backup therefore it cannot be portable

                                                        CHAPTER 16

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        APPLICATIONS OF

                                                        THE PROJECT

                                                        Application

                                                        161 APPLICATIONS OF THE PROJECT

                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                        charge for the mobile phone in any places

                                                        It is used for emergency charging purposes

                                                        It can be installed in malls railway stations bus stops and other public

                                                        places

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        The charger offers a unique revenue opportunity for a vast range of

                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                        any location where there is a high footfall creating a large number of

                                                        potential users

                                                        It can be installed in offices and collages for pay charging facility

                                                        CHAPTER 17

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        FUTURE

                                                        DEVELOPMENT OF

                                                        THE PROJECT

                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                        This project is very useful to people who are using mobile phone without charging

                                                        condition in public places

                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                        It will provide battery backup for make it portable

                                                        It will also provide SMS system in future

                                                        We can also increase the charging time by editing software of the project

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 18

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        COST ANALYSIS

                                                        OF THE PROJECT

                                                        COST ANALYSIS OF THE PROJECT

                                                        181 COST ANALYSIS OF THE PROJECT

                                                        1811 Component list for power supply card

                                                        Footprint Quantity Designators Rate

                                                        Resistor

                                                        22K 1 R2 1

                                                        1K 1 R1 1

                                                        Capacitor

                                                        1000uf25V 1 C5 10

                                                        2200uf25V 1 C1 10

                                                        022uf 2 C6 C2 1

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                        Table 1811 Component list for power supply card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        01uf 2 C4 C3 1

                                                        IC

                                                        BRIDGE W10 2 BR2 BR1 10

                                                        L7812CV (TO-220) 1 U2 8

                                                        L7805CV (TO-220) 1 U1 8

                                                        Connector

                                                        CON PHO 2PIN 2 J3 J2 16

                                                        CON PHO 3PIN 1 J1 12

                                                        LED3mm red 2 L1 L2 15

                                                        Heat sink (TO-220) 2 16

                                                        Total 955

                                                        1812 Component list for battery charger card

                                                        Footprint Quantity Rate

                                                        Capacitor

                                                        2200uf25V 1 1000

                                                        022uf 4 100

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        01uf 4 100

                                                        IC

                                                        BRIDGE W10 1 500

                                                        L7805CV (TO-220) 4 3200

                                                        Connector

                                                        CON PHO 2PIN 1 800

                                                        Relimate 2 pin 1 400

                                                        relimate 3 pin 4 2000

                                                        Heat sink (TO-220) 4 1200

                                                        TOTAL 9300

                                                        1813 Component list for Relay card

                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                        Table 1812Component list for battery charger card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                        Total 18900

                                                        1814Component list for controller card

                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                        Table 1813Component list for relay card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                        total 27000

                                                        1815 Miscellaneous material

                                                        Material Quantity Rate

                                                        electronic item

                                                        Transformer

                                                        TXR1 0-9-15 1 20000

                                                        0-9 1A

                                                        0-15 100mA

                                                        TXR2 0-9 1 16500

                                                        0-9 1A

                                                        Proximity switch 1 20000

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                        Table 1814Component list for microcontroller card

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Red push bottom 4 4000

                                                        Green push button 1 1000

                                                        Red led 5mm 4 800

                                                        Green led 5mm 4 800

                                                        Led holder 8 1600

                                                        Copper clad 2 4000

                                                        3 core cable 1 meter 1500

                                                        3 pin plug 1 3000

                                                        2 pin relimate wire 19 9000

                                                        3 pin relimate wire 5 3750

                                                        4 pin relimate wire 2 2000

                                                        mechanical items

                                                        Enclosure 1 25000

                                                        Acrylic sheet 2 X 1 30000

                                                        12mm cable gland 1 1000

                                                        Screw 3mm 33 2000

                                                        Screw 35mm 6 2400

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        10 mm spacers 100 1500

                                                        10mm insert to stud 50 10000

                                                        cable tie 2500

                                                        Total 162350

                                                        CHAPTER 19

                                                        APPENDIX

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                        Table 1815Component list for miscellaneous material

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        APPENDIX

                                                        191 APPENDIX

                                                        1911 78xx IC datasheet

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                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1912 W10 datasheet

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1913 4n33 IC datasheet

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                        1914 MAX 232

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1915 ULN2003a IC datasheet

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        1916 89V51RD2 IC datasheet

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 20

                                                        CONCLUSION

                                                        CONCLUSION

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        201 CONCLUSION

                                                        The coin-operated mobile phone charger is already successfully installed in

                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                        installed in any business premises

                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                        a high footfall creating a large number of potential users

                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                        extend low mobile phone talk time provide battery charging

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 21

                                                        IMAGES OF THE

                                                        PROJECT

                                                        Images of the project

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        211 IMAGES OF THE PROJECT

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                        fig211 lsquoCoin operated mobile battery charger

                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Fig 216 Relay driver circuit

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                        Fig 213 Constant voltage battery charger circuit

                                                        Fig214 Power supply circuit

                                                        Fig215 Metal detector proximity switch

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Fig217 Microcontroller circuit

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        Fig228 coin operated mobile battery charger project presentation

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        CHAPTER 22

                                                        BIBILOGRAPHY

                                                        BIBLIOGRAPHY

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                        221 BIBLIOGRAPHY

                                                        BOOKS

                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                        INTERNET LINKS

                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                        • CHAPTER 1

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          High reliability and long life

                                                          734 Descriptions

                                                          Dice material GaInN

                                                          Emitting Color Super Bright White

                                                          Device Outlineφ5mm Round Type

                                                          Lens Type Water Clear

                                                          74 RELAY

                                                          741 WORKING

                                                          A relay is an electrically operated switch Current

                                                          flowing through the coil of the relay creates a magnetic field

                                                          which attracts a lever and changes the switch contacts The coil

                                                          current can be on or off so relays have two switch positions and

                                                          most have double throw (changeover) switch contacts

                                                          Relays are like remote control switches and are used in

                                                          many applications because of their relative simplicity long life

                                                          and proven high reliability

                                                          742 USES

                                                          The main operation of a relay comes in places where only a low-power signal can be

                                                          used to control a circuit

                                                          It is also used in places where only one signal can be used to control a lot of circuits

                                                          The application of relays started during the invention of telephones They played an

                                                          important role in switching calls in telephone exchanges They were also used in

                                                          long distance telegraphy They were used to switch the signal coming from one

                                                          source to another destination

                                                          743 TESTING

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 29

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          A relay will usually have a coil pole terminal and a set of

                                                          contacts The set of contacts that are open when the relay is not

                                                          energized are called normally open (NO) contacts and the set of

                                                          contacts that are closed when the relay is not energized are called

                                                          normally closed (NC) contacts The following steps can be used to perform the testing of

                                                          the relay using a multimeter

                                                          Keep the multimeter in the continuity check mode

                                                          Check for continuity between the NC contacts and pole

                                                          Check for discontinuity between NO contacts and the pole

                                                          Now energies the relay using the rated voltage For example use a 9V battery for

                                                          energizing a 9V relay The relay will engage with clicking sound

                                                          Now check for continuity between NO contacts and pole

                                                          Also check for discontinuity between NC contacts and pole

                                                          As a final test measure the resistance of the relay coil using a multimeter and check

                                                          whether it is matching to the value stated by the manufacturer

                                                          If all the above tests are positive we can conclude that the relay is healthy

                                                          75 TRANSFORMER

                                                          751 WORKING

                                                          A transformer is a device that transfers electrical energy

                                                          from one circuit to another through inductively coupled

                                                          electrical conductors A changing current in the first circuit (the

                                                          primary) creates a changing magnetic field

                                                          This changing magnetic field induces a changing voltage in the second circuit (the

                                                          secondary) This effect is called mutual induction

                                                          If a load is connected to the secondary circuit electric charge will flow in the

                                                          secondary winding of the transformer and transfer energy from the primary circuit to the

                                                          load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                          of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                          number of primary turns

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          By appropriate selection of the numbers of turns a transformer thus allows an

                                                          alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                          making it less

                                                          752 TESTING

                                                          1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                          scale and then adjusting the knob to verify its reading is an easy step to the

                                                          reading of the ohm

                                                          2 To check the resistance of the coil unplug or unsolder the leads of the

                                                          transformer from its circuit and measure the resistance of each coil

                                                          3 The next step is to test each coil for shorts to other coils

                                                          76 RECTIFIER BRIDGE (W 10)

                                                          761 WORKING

                                                          A diode bridge rectifier is a device for converting AC or

                                                          alternating current electricity into DC or direct current AC

                                                          electricity goes from positive to negative constantly whereas DC

                                                          always flows in the same direction

                                                          AC electricity is more efficient to transmit and easier to

                                                          convert into different voltages However most appliances need DC current to run A diode

                                                          bridge rectifier is the most common type of power supply used to provide this current In

                                                          our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                          77 OSCILLATOR

                                                          771 Working

                                                          An oscillator puts out an endless series of pulses The output

                                                          constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          all digital circuits have some type of oscillator This stream of output pulses is often

                                                          called a clock One of the most important features of any oscillator is its frequency stability

                                                          or in other words its ability to provide a constant frequency output under varying load

                                                          conditions Some of the factors that affect the frequency stability of an oscillator include

                                                          temperature variations in the load and changes in the DC power supply Frequency stability

                                                          of the output signal can be improved by the proper selection of the components used for the

                                                          resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                          be obtained from normal LC and RC tank circuits

                                                          In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                          divided to give you exact clock rates for most of the common baud rates for the UART

                                                          especially for the higher speeds (9600 19200) These crystals are readily available and

                                                          commonly used

                                                          78 SWITCH

                                                          781 WORKING

                                                          The most familiar form of switch is a manually operated

                                                          electromechanical device with one or more sets of electrical contacts

                                                          Each set of contacts can be in one of two states either closed meaning

                                                          the contacts are touching and electricity can flow between them or

                                                          open meaning the contacts are separated and the switch is non

                                                          conducting The mechanism actuating the transition between these two

                                                          states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                          momentary (push-for on or push-for off) type

                                                          782 USES

                                                          In electronics a switch is an electrical component that can break an electrical

                                                          circuit interrupting the current or diverting it from one conductor to another

                                                          783 TESTING

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                          no connection Switch can tested by using multimeter in continuity range

                                                          79 DARLINGTON PAIR IC (ULN2003a)

                                                          791 WORKING

                                                          The Darlington transistor (often called a Darlington pair) is a

                                                          compound structure consisting of two bipolar transistors (either

                                                          integrated or separated devices) connected in such a way that the

                                                          current amplified by the first transistor is amplified further by the

                                                          second one This configuration gives a much higher current gain than

                                                          each transistor taken separately and in the case of integrated devices

                                                          can take less space than two individual transistors because they can

                                                          use a shared collector

                                                          Integrated Darlington pairs come packaged singly in

                                                          transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                          The Darlington transistor array used is ULN2003 Applications include relay

                                                          drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                          drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                          to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                          for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                          792 FEATURES

                                                          The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                          transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                          with common-cathode clamp diodes for switching inductive loads The collector-current

                                                          rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                          higher current capability

                                                          710 SERIES VOLTAGE REGULATER IC (78XX)

                                                          7101 WORKING

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Voltage Regulator (regulator) usually having three legs converts varying input

                                                          voltage and produces a constant regulated output voltage They are available in a variety of

                                                          outputs

                                                          The most common part numbers start with the numbers 78 or 79 and finish with two

                                                          digits indicating the output voltage The number 78 represents positive voltage and 79

                                                          negative one The 78XX series of voltage regulators are designed for positive input

                                                          The LM78XX series typically has the ability to drive current up to 1A For

                                                          application requirements up to 150mA 78LXX can be used As mentioned above the

                                                          component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                          an output leg with the regulators voltage

                                                          As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                          voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                          difference between the input and output appears as heat If the input voltage is unnecessarily

                                                          high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                          sinking the regulator will shut down

                                                          711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                          7111 WORKING

                                                          The MAX-232 It includes a Charge Pump which generates

                                                          +10V and -10V from a single 5v supply

                                                          This IC also includes two receivers and two transmitters in

                                                          the same package This is handy in many cases when we only want to

                                                          use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                          receive line and one for the transmit There are also many variations of these devices The

                                                          large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                          available which use smaller capacitors and even some with inbuilt capacitors However the

                                                          MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                          Dual Charge-Pump Voltage Converter

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                          V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                          output

                                                          712 OPTOCOUPLER IC (4N33)

                                                          7121 WORKING

                                                          In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                          photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                          between elements of a circuit typically a transmitter and a receiver while keeping them

                                                          electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                          back to an electrical signal electrical contact along the path is broken

                                                          Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                          essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                          arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                          light-triggered diac The two are separated by a transparent barrier which blocks any

                                                          electrical current flow between the two but does allow the passage of light

                                                          The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                          silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                          of isolation between driving and load circuits These Optocouplers can be used to replace

                                                          reed and mercury relays with advantages of long life high speed switching and elimination

                                                          of magnetic field

                                                          713 MICROCONTROLLER IC (89V51 RD 2 )

                                                          713 WORKING

                                                          The P89V51RD2 is an 80C51 microcontroller with 64

                                                          kB Flash and 1024 bytes of data RAM

                                                          A key feature of the P89V51RD2 is its X2 mode option

                                                          The design engineer can choose to run the application with the conventional 80C51 clock

                                                          rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                          feature is to keep the same performance by reducing the clock frequency by half thus

                                                          dramatically reducing the EMI

                                                          The Flash program memory supports both parallel programming and in serial In-

                                                          System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                          speed reducing programming costs and time to market ISP allows a device to be

                                                          reprogrammed in the end product under software control The capability to fieldupdate the

                                                          application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                          In-Application Programmable (IAP) allowing the Flash program memory to be

                                                          reconfigured even while the application is running

                                                          714 RELIMATE CONNECTOR

                                                          7141 WORKING

                                                          These are wire to board type connectors used to facilitate

                                                          proper and firm electrical connection between the relay card and

                                                          microcontroller card

                                                          The connector has following specifications

                                                          No of Ways 2-20

                                                          Voltage Rating 250V AC DC

                                                          Current Rating 3A AC DC

                                                          Contact Resistance 20mW max

                                                          Insulation Resistance 1000MW min

                                                          Dielectric Withstanding 1000V ACminute

                                                          Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                          The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                          connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                          conflicts

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          715 RS-232 PORT CONNECTOR

                                                          7151 WORKING

                                                          Almost all digital devices which we use require either TTL

                                                          or CMOS logic levels Therefore the first step to connecting a

                                                          device to the RS-232 port is to transform the RS-232 levels back

                                                          into 0 and 5 Volts This is done by RS-232 Level Converters

                                                          Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                          Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                          The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                          problem in many instances where only a single supply of +5V is present

                                                          CHAPTER 8

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          IMPLIMENTATION

                                                          OF THE PCB

                                                          Components layout designing

                                                          Developing or Etching the PCB

                                                          Other operations like Drilling Cutting Tinning

                                                          81 IMPLIMENTATION OF THE PCB

                                                          A proper PCB ensure that various circuit components are interconnected as per the

                                                          circuit diagram once they have been placed on the PCB in their proper positions and

                                                          subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                          base material to which is permanently attached a flat metallic network of conducting path

                                                          whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                          for this project is single one

                                                          The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                          board configuration however is most widely used and it may be of the nature of the single

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                          which ensures adequate and permanent low resistance coupling

                                                          811 BOARD DESIGN

                                                          PCB designed is the most important and requires great care during work In this case

                                                          great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                          is designed it is virtually impossible to alter it While designing a circuit designer should

                                                          take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                          unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                          also help to solve this problem when circuit is complicated

                                                          812 THE MASTER DIAGRAM

                                                          The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                          which is commonly made twice as the finished circuit since this makes the working on that

                                                          much easier especially when circuit is complicated photography eventually reduces the

                                                          size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                          the designing -

                                                          a The space between the conductors must be strictly controlled to avoid the possibility

                                                          of electrical discharges or unwanted capacitance The amount by which the mater

                                                          diagram is to reduce in size is thus a critical deign feature

                                                          b The conductor must be wider in those part of the circuits that are going to handle

                                                          large current must be handle without undue temperature of conductors

                                                          c The minimum width of copper should not generally be less than about 15mmThis

                                                          is related to mechanical strength rather than electrical properties and it also ensure

                                                          that strips remains securely bounded to the base material

                                                          d The points where the component holes for component lead wire occurs must be sited

                                                          to suit the dimensions of the component and dimensions between lead-out wire so

                                                          that the components can be situated correctly on finished board The conductor is

                                                          also main large at the point of holes

                                                          813 PCB MAKING

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          When the mater diagram probable twice the size of real PCB has been evolved the

                                                          test major step consists of etching or dissolving the unwanted metal from copper claded

                                                          board to create a circuit as depicted by master diagram It must be stressed that very

                                                          accurate checking master is essential at this stage Then the master point is mounted on a

                                                          special frame on easy facing of a larger camera and with the aid of the very powerful

                                                          illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                          developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                          brought into operation This comprises the camera body mounted so that sideways after

                                                          each exposure In this way number of copies of the original master diagram is set out

                                                          exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                          In case of simple and need of number of less PCB economic and advisable to use the

                                                          following lab method of PCB making

                                                          Planning The Circuit

                                                          It is not a particular difficult There are several important factors that need not be

                                                          taken into account if the finished device is to work properly we must consider gain factor

                                                          and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                          possibility We must also ensure that conductors and components carrying high frequency

                                                          current are well separated from the part of the circuit We are also to make sure that all

                                                          components need to return to earth are properly connected and that possibility of common

                                                          impedance arising earth returned

                                                          Circuit is totally eliminated by making all earth as substantial possible consistent

                                                          with nature of design Other factors that have to successfully studied include availability of

                                                          adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                          made for mechanical fixing ventilation effect of vibration

                                                          Cleaning The Board

                                                          The copper side of the board must be thoroughly cleaned before circuit plan is

                                                          transferred to it This is important because even slightest trace of graze (from figure of

                                                          instance) will impure the etching process and when the circuit plan has been neatly

                                                          transferred to copper in this manner the board is held under running tap and the allowed to

                                                          dry before resist is applied

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Transforming the Plan

                                                          Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                          A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                          board and working plan and carefully trace the lines of original plan with a ball pen

                                                          Resist

                                                          Resist is nothing more than a substrate that is unaffected by presence etching

                                                          chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                          clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                          covered when resists the leaguer type of paints possess good resist properties but

                                                          disadvantage of relatively long time taken for drying It is essential to resist through

                                                          hardening before etching is started Nail polished are better as they quickly and are less

                                                          difficult to remove

                                                          To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                          PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                          short circulating due to paints are completely the avoid etching tapes and pads are available

                                                          in different sizes

                                                          Correcting Error

                                                          When a result has been thoroughly hardened any errors that have been made can

                                                          usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                          edges of copper conductors on board the resist must be applied with steady band

                                                          Etching

                                                          Next comes etching of unwanted copper amp whether a small single is all that is

                                                          required as quantity of board to be produce certain precautions must be taken before

                                                          operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                          quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                          etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                          grams of water

                                                          Agitation

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                          the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                          laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                          gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                          temperature and thickness of copper foil

                                                          Finishing Off

                                                          When all unwanted copper is dissolved from areas between conductor board should

                                                          be taken from an etchant amp washed in water The resist must be removed using proper

                                                          solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                          seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                          PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                          This process is called Tinning This process of coating involve track with soldier

                                                          Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                          ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                          Assembling On PCB

                                                          After the holes are drilled the component have to be assembled on PCB before

                                                          assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                          accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                          repetitive use cleans soldering iron

                                                          CHAPTER 9

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          SOLDERING

                                                          TECHNIQUE

                                                          Technique for good soldering

                                                          91 SOLDERING TECHNIQUE

                                                          For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                          oxide film or dirt on it If required flux is applied on the points to be soldered

                                                          Now the joint to be soldered is heated with the help of soldering iron Heat

                                                          applied should be such that when solder wire is touched to joint it must melt

                                                          quickly

                                                          The joint and the soldering iron is held such that molten solder should flow

                                                          smoothly over the joint

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          When joint is completely covered with molten solder the soldering iron is re-

                                                          moved

                                                          The joint is allowed to cool without any movement

                                                          The bright shining solder indicates good soldering

                                                          In case of dry solder joint a air gap remains in between the solder material and

                                                          the joint It means that soldering is improper This is removed and again solder-

                                                          ing is done

                                                          Thus this way all the components are soldered on P C B

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 10

                                                          PCB LAYOUTS

                                                          Schematic diagram

                                                          Bottom and top layout

                                                          101 POWER SUPPLY CARD

                                                          1011 SCHIMETIC DIAGRAM

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1012 LEGEND MARKING

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                          Fig1011 Schematic diagram of power supply card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1013TOP LAYER

                                                          1014 BOTTOM LAYER

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                          Fig1013 Top layer of power supply

                                                          card

                                                          Fig1014 Schematic diagram of power supply card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          102 BATTERY CHARGER CARD

                                                          1021 SCHEMATIC DIAGRAM

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                          Fig1021 Schematic diagram of battery charger card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          103 RELAY CARD

                                                          1031 SCHIMETIC DIAGRAM

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                          Fig1031 Schematic diagram of Relay card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1032 RELAY CARD LEGEND MARKING

                                                          1033 TOP LAYER

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                          Fig1032 Legend marking of Relay card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1034 BOTTOM LAYER

                                                          104 MICROCONTROLER CARD

                                                          1041 SCHIMETIC DIAGRAM

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                          Fig1034 Bottom layer of Relay card

                                                          Fig1041 Schematic diagram of microcontroller card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1042 ALL LAYERS

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                          Fig1042 All layer of microcontroller card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 11

                                                          INTRODUCTION

                                                          OF SOFTWARE

                                                          Keil (microVision 2)

                                                          Eagle (Easily Applicable Graphical Layout Editor)

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          111 Keil (microVision 2)

                                                          1111 Introduction to C51 Cross Compiler

                                                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                          generates object code that matches the efficiency and speed of assembly programming

                                                          Using a high-level language like C has many advantages over assembly language

                                                          programming

                                                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                          the memory structure of the 8051 CPU is desirable (but not necessary)

                                                          Details like register allocation and addressing of the various memory types and data

                                                          types is managed by the compiler

                                                          Programs get a formal structure (which is imposed by the C programming language) and

                                                          can be divided into separate functions This contributes to source code reusability as

                                                          well as better overall application structure

                                                          The ability to combine variable selection with specific operations improves program

                                                          readability

                                                          Keywords and operational functions that more nearly resemble the human thought

                                                          process may be used

                                                          Programming and program test time is drastically reduced

                                                          The C run-time library contains many standard routines such as formatted output

                                                          numeric conversions and floating-point arithmetic

                                                          Existing program parts can be more easily included into new programs because of

                                                          modular program construction techniques

                                                          The language C is a very portable language (based on the ANSI standard) that enjoys

                                                          wide popular support and is easily obtained for most systems Existing program

                                                          investments can be quickly adapted to other processors as needed

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1112 Software Development Cycle in Keil

                                                          When we use the Keil Software tools the

                                                          project development cycle is roughly the same as

                                                          it is for any other software development project

                                                          1 Create a project select the target chip from the

                                                          device database and configure the tool settings

                                                          2 Create source files in C or assembly

                                                          3 Build your application with the project

                                                          manager

                                                          4 Correct errors in source files

                                                          5 Test the linked application A block diagram of

                                                          the complete 8051 tool set may best illustrate the

                                                          development cycle

                                                          112 Eagle (Easily Applicable Graphical Layout Editor)

                                                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                          1121 Schematic Editor

                                                          In this one can develop amp design circuits for the required PCB

                                                          1122 Layout Editor

                                                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                          Fig 111 Software development in KEIL

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1123 Library Editor

                                                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                          1124 Auto Router

                                                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                          the PCB tracks designed

                                                          1125 Cam Processor

                                                          This is used to finally print the various layers of the designed PCB viz Top Layer

                                                          Bottom Layer Component Layer Masking Layer etc

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                          Start

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 12

                                                          INTRODUCTION

                                                          OF

                                                          PROGRAMMING

                                                          Flowchart of programming

                                                          Program code

                                                          121 Flowchart

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                          2

                                                          flag9==1

                                                          flag9=1

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                          flag11==1

                                                          flag11=1 flag11=0 flag4=0

                                                          REady_LED4=0

                                                          Sw2_op (P01) ==0

                                                          My delay (10)

                                                          3 3

                                                          flag2=1 disp2=1 k2=0

                                                          3

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                          4

                                                          flag11==1

                                                          flag11=0 flag4=0 REady_LED4=0

                                                          flag11=1

                                                          My delay (10)

                                                          flag3=1 disp3=1 k3=0

                                                          k1==0||k2==0||k4==0

                                                          Sw3_op (P02) ==0

                                                          5

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                          flag5==1

                                                          5

                                                          flag11==1

                                                          flag7=1

                                                          flag7==1

                                                          flag7=0 flag2=0 REady_LED2=0

                                                          6

                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                          flag11=0 flag4=0 REady_LED4=0

                                                          flag11=1

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                          6

                                                          My delay (10)

                                                          flag4=1 disp4=1 k4=0

                                                          k1==0||k2==0||k3==0 flag5==1

                                                          7

                                                          Sw4_op (P03) ==0

                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                          7

                                                          flag7==1

                                                          flag9==1

                                                          flag7=1

                                                          flag7=0 flag2=0 REady_LED2=0

                                                          flag9=0 flag3=0 REady_LED3=0

                                                          flag9=1

                                                          Sw5_op A(P04) ==0

                                                          My delay (10)

                                                          8

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                          9

                                                          flag2==1

                                                          flag3==1

                                                          8

                                                          flag1==1

                                                          flag4==1 flag5=1 disp5=1

                                                          flag9=1 disp5=1

                                                          flag7=1 disp5=1

                                                          flag11=1 disp5=1

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                          Sw6_op (P05) ==0

                                                          My delay (10)

                                                          flag2==1 ampamp flag7==1

                                                          flag3==1 ampamp flag9==1 9

                                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                          flag8=1 disp6=1

                                                          10

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                          10

                                                          flag4==1 ampamp flag11==1

                                                          flag10=1 disp6=1

                                                          flag12=1 disp6=1

                                                          flag8==1

                                                          flag10==1

                                                          11

                                                          flag6==1

                                                          i++

                                                          l++

                                                          j++

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                          flag12==1

                                                          M++

                                                          11

                                                          Stop

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          122 Program

                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                          define buzzerP2_0 buzzer indication

                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                          output Led for indication

                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                          function prototype declaration

                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                          void init_timer() timer 0 initialization function

                                                          variable declaration

                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          start of main programme

                                                          void main()

                                                          init_timer() call it timer initialization function

                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                          start of while loop

                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                          condition for switch1

                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                          if(iltk) loop will repeat for desired time of charging

                                                          if(igt=1000)

                                                          buzzer=1 turn on buzzer if (ii==20)

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          REady_LED1=1 turn on ready indication of led1

                                                          else if(ii==40)

                                                          REady_LED1=0ii=0

                                                          elseREady_LED1=0

                                                          START_LED1=1

                                                          else

                                                          START_LED1=0

                                                          k1=1 buzzer=0

                                                          REady_LED1=0 flag1=0

                                                          flag5=0flag6=0

                                                          condition for switch2

                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                          REady_LED2=1 turn on ready 2 led indication

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          disp2=0

                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                          if(jltk)

                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                          elseREady_LED2=0

                                                          START_LED2=1

                                                          else START_LED2=0

                                                          REady_LED2=0 k2=1 buzzer=0

                                                          flag2=0flag7=0flag8=0

                                                          j=0jj=0

                                                          condition for switch 3

                                                          if(flag3==1) check swich3 pressed

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          if(disp3==1 )

                                                          REady_LED3=1 disp3=0

                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                          if(lltk)

                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                          elseREady_LED3=0

                                                          START_LED3=1

                                                          else START_LED3=0

                                                          LED2=0 k3=1 buzzer=0

                                                          REady_LED3=0 flag3=0

                                                          flag9=0flag10=0

                                                          l=0ll=0

                                                          condition for switch 4

                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          REady_LED4=1 disp4=0

                                                          if(flag11==1) check coin is pressed

                                                          if(flag12==1) START is pressed

                                                          if(mltk)

                                                          if(mgt1000)

                                                          buzzer=1 if(mm==20)

                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                          elseREady_LED4=0

                                                          START_LED4=1

                                                          else START_LED4=0

                                                          buzzer=0 k4=1

                                                          REady_LED4=0 flag4=0

                                                          flag11=0flag12=0

                                                          m=0mm=0

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          while(1)

                                                          end of main programme

                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                          whenever specific time the interrupt will generate control will go in following function

                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if(sw1_op==0 ) ready switch flag for system1

                                                          my_delay(10) CALL DELAY FUNCTION

                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                          if(flag7==1) SET THE FLAG

                                                          flag7=1

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                          flag9=1

                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                          flag11=1

                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if(sw2_op==0 ) fready switch flag for system2

                                                          my_delay (10)

                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                          if(flag5==1)

                                                          flag5=1

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                          flag9=1

                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                          flag11=1

                                                          elseflag11=0flag4=0REady_LED4=0

                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                          if(flag7==1)

                                                          flag7=1

                                                          else

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                          flag5=1

                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                          flag11=1

                                                          elseflag11=0flag4=0REady_LED4=0

                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                          if(flag7==1)

                                                          flag7=1

                                                          elseflag7=0

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                          flag5=1

                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                          flag9=1

                                                          elseflag9=0flag3=0REady_LED3=0

                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                          if(flag6==1)

                                                          i++ if (igt1000) ii++

                                                          if (flag8==1)

                                                          j++ if(jgt1000) jj++

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          if (flag10==1)

                                                          l++ if (lgt1000) ll++

                                                          if (flag12==1)

                                                          m++ if (mgt1000) mm++

                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 13

                                                          TROUBLE SHOOT

                                                          Troubleshoot

                                                          131 TROUBLE SHOOT

                                                          A newly assembled circuit does not work may be due to -

                                                          Faulty components

                                                          Improper soldering

                                                          Wrong connections

                                                          Also any stop in working after some period may be due to -

                                                          Component failure

                                                          Supply failure

                                                          Damaging of PCB

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Fault finding is very essential if you want the circuit to operate properly

                                                          If a newly assembled circuit is not working properly check all the components and

                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                          proper soldering

                                                          If faults are not observed during physical observations one should proceed for Hot

                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                          Resistance measurement is also done which is known as Dry test

                                                          During this project work some green LEDs was not glow then we checked it

                                                          continuity and replace it

                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                          heated after starting the project It happens because of some soldering points are shorted

                                                          during soldering PCB We solved that problem

                                                          CHAPTER 14

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          ADVANTAGES OF

                                                          THE PROJECT

                                                          Advantages

                                                          141 ADVANTAGES OF THE PROJECT

                                                          Simple and hand efficient Microcontroller based system

                                                          Fast charging capacity

                                                          Simple to operate

                                                          Ease of mobility

                                                          Facilitates connectivity for 90 of cellular phones

                                                          Less expensive

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Reduced man power

                                                          Low power consumption

                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                          CHAPTER 15

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          DISADVANTAGES

                                                          OF THE PROJECT

                                                          Disadvantages

                                                          151 DISADVANTAGES OF THE PROJECT

                                                          It requires mains supply to work project

                                                          Due to limited charging channels till now there may be a possibility that

                                                          mobile phones of few brands cannot be connected for charging For this

                                                          purpose we have to use separate connectors for that specific brand differently

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                          min

                                                          It does not have battery backup therefore it cannot be portable

                                                          CHAPTER 16

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          APPLICATIONS OF

                                                          THE PROJECT

                                                          Application

                                                          161 APPLICATIONS OF THE PROJECT

                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                          charge for the mobile phone in any places

                                                          It is used for emergency charging purposes

                                                          It can be installed in malls railway stations bus stops and other public

                                                          places

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          The charger offers a unique revenue opportunity for a vast range of

                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                          any location where there is a high footfall creating a large number of

                                                          potential users

                                                          It can be installed in offices and collages for pay charging facility

                                                          CHAPTER 17

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          FUTURE

                                                          DEVELOPMENT OF

                                                          THE PROJECT

                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                          This project is very useful to people who are using mobile phone without charging

                                                          condition in public places

                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                          It will provide battery backup for make it portable

                                                          It will also provide SMS system in future

                                                          We can also increase the charging time by editing software of the project

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 18

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          COST ANALYSIS

                                                          OF THE PROJECT

                                                          COST ANALYSIS OF THE PROJECT

                                                          181 COST ANALYSIS OF THE PROJECT

                                                          1811 Component list for power supply card

                                                          Footprint Quantity Designators Rate

                                                          Resistor

                                                          22K 1 R2 1

                                                          1K 1 R1 1

                                                          Capacitor

                                                          1000uf25V 1 C5 10

                                                          2200uf25V 1 C1 10

                                                          022uf 2 C6 C2 1

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                          Table 1811 Component list for power supply card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          01uf 2 C4 C3 1

                                                          IC

                                                          BRIDGE W10 2 BR2 BR1 10

                                                          L7812CV (TO-220) 1 U2 8

                                                          L7805CV (TO-220) 1 U1 8

                                                          Connector

                                                          CON PHO 2PIN 2 J3 J2 16

                                                          CON PHO 3PIN 1 J1 12

                                                          LED3mm red 2 L1 L2 15

                                                          Heat sink (TO-220) 2 16

                                                          Total 955

                                                          1812 Component list for battery charger card

                                                          Footprint Quantity Rate

                                                          Capacitor

                                                          2200uf25V 1 1000

                                                          022uf 4 100

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          01uf 4 100

                                                          IC

                                                          BRIDGE W10 1 500

                                                          L7805CV (TO-220) 4 3200

                                                          Connector

                                                          CON PHO 2PIN 1 800

                                                          Relimate 2 pin 1 400

                                                          relimate 3 pin 4 2000

                                                          Heat sink (TO-220) 4 1200

                                                          TOTAL 9300

                                                          1813 Component list for Relay card

                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                          Table 1812Component list for battery charger card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                          Total 18900

                                                          1814Component list for controller card

                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                          Table 1813Component list for relay card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                          total 27000

                                                          1815 Miscellaneous material

                                                          Material Quantity Rate

                                                          electronic item

                                                          Transformer

                                                          TXR1 0-9-15 1 20000

                                                          0-9 1A

                                                          0-15 100mA

                                                          TXR2 0-9 1 16500

                                                          0-9 1A

                                                          Proximity switch 1 20000

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                          Table 1814Component list for microcontroller card

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Red push bottom 4 4000

                                                          Green push button 1 1000

                                                          Red led 5mm 4 800

                                                          Green led 5mm 4 800

                                                          Led holder 8 1600

                                                          Copper clad 2 4000

                                                          3 core cable 1 meter 1500

                                                          3 pin plug 1 3000

                                                          2 pin relimate wire 19 9000

                                                          3 pin relimate wire 5 3750

                                                          4 pin relimate wire 2 2000

                                                          mechanical items

                                                          Enclosure 1 25000

                                                          Acrylic sheet 2 X 1 30000

                                                          12mm cable gland 1 1000

                                                          Screw 3mm 33 2000

                                                          Screw 35mm 6 2400

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          10 mm spacers 100 1500

                                                          10mm insert to stud 50 10000

                                                          cable tie 2500

                                                          Total 162350

                                                          CHAPTER 19

                                                          APPENDIX

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                          Table 1815Component list for miscellaneous material

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          APPENDIX

                                                          191 APPENDIX

                                                          1911 78xx IC datasheet

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1912 W10 datasheet

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1913 4n33 IC datasheet

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                          1914 MAX 232

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1915 ULN2003a IC datasheet

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          1916 89V51RD2 IC datasheet

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 20

                                                          CONCLUSION

                                                          CONCLUSION

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          201 CONCLUSION

                                                          The coin-operated mobile phone charger is already successfully installed in

                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                          installed in any business premises

                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                          a high footfall creating a large number of potential users

                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                          extend low mobile phone talk time provide battery charging

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 21

                                                          IMAGES OF THE

                                                          PROJECT

                                                          Images of the project

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          211 IMAGES OF THE PROJECT

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                          fig211 lsquoCoin operated mobile battery charger

                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Fig 216 Relay driver circuit

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                          Fig 213 Constant voltage battery charger circuit

                                                          Fig214 Power supply circuit

                                                          Fig215 Metal detector proximity switch

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Fig217 Microcontroller circuit

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          Fig228 coin operated mobile battery charger project presentation

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          CHAPTER 22

                                                          BIBILOGRAPHY

                                                          BIBLIOGRAPHY

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                          221 BIBLIOGRAPHY

                                                          BOOKS

                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                          INTERNET LINKS

                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                          • CHAPTER 1

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            A relay will usually have a coil pole terminal and a set of

                                                            contacts The set of contacts that are open when the relay is not

                                                            energized are called normally open (NO) contacts and the set of

                                                            contacts that are closed when the relay is not energized are called

                                                            normally closed (NC) contacts The following steps can be used to perform the testing of

                                                            the relay using a multimeter

                                                            Keep the multimeter in the continuity check mode

                                                            Check for continuity between the NC contacts and pole

                                                            Check for discontinuity between NO contacts and the pole

                                                            Now energies the relay using the rated voltage For example use a 9V battery for

                                                            energizing a 9V relay The relay will engage with clicking sound

                                                            Now check for continuity between NO contacts and pole

                                                            Also check for discontinuity between NC contacts and pole

                                                            As a final test measure the resistance of the relay coil using a multimeter and check

                                                            whether it is matching to the value stated by the manufacturer

                                                            If all the above tests are positive we can conclude that the relay is healthy

                                                            75 TRANSFORMER

                                                            751 WORKING

                                                            A transformer is a device that transfers electrical energy

                                                            from one circuit to another through inductively coupled

                                                            electrical conductors A changing current in the first circuit (the

                                                            primary) creates a changing magnetic field

                                                            This changing magnetic field induces a changing voltage in the second circuit (the

                                                            secondary) This effect is called mutual induction

                                                            If a load is connected to the secondary circuit electric charge will flow in the

                                                            secondary winding of the transformer and transfer energy from the primary circuit to the

                                                            load In an ideal transformer the induced voltage in the secondary winding (VS) is a fraction

                                                            of the primary voltage (VP) and is given by the ratio of the number of secondary turns to the

                                                            number of primary turns

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 30

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            By appropriate selection of the numbers of turns a transformer thus allows an

                                                            alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                            making it less

                                                            752 TESTING

                                                            1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                            scale and then adjusting the knob to verify its reading is an easy step to the

                                                            reading of the ohm

                                                            2 To check the resistance of the coil unplug or unsolder the leads of the

                                                            transformer from its circuit and measure the resistance of each coil

                                                            3 The next step is to test each coil for shorts to other coils

                                                            76 RECTIFIER BRIDGE (W 10)

                                                            761 WORKING

                                                            A diode bridge rectifier is a device for converting AC or

                                                            alternating current electricity into DC or direct current AC

                                                            electricity goes from positive to negative constantly whereas DC

                                                            always flows in the same direction

                                                            AC electricity is more efficient to transmit and easier to

                                                            convert into different voltages However most appliances need DC current to run A diode

                                                            bridge rectifier is the most common type of power supply used to provide this current In

                                                            our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                            77 OSCILLATOR

                                                            771 Working

                                                            An oscillator puts out an endless series of pulses The output

                                                            constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            all digital circuits have some type of oscillator This stream of output pulses is often

                                                            called a clock One of the most important features of any oscillator is its frequency stability

                                                            or in other words its ability to provide a constant frequency output under varying load

                                                            conditions Some of the factors that affect the frequency stability of an oscillator include

                                                            temperature variations in the load and changes in the DC power supply Frequency stability

                                                            of the output signal can be improved by the proper selection of the components used for the

                                                            resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                            be obtained from normal LC and RC tank circuits

                                                            In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                            divided to give you exact clock rates for most of the common baud rates for the UART

                                                            especially for the higher speeds (9600 19200) These crystals are readily available and

                                                            commonly used

                                                            78 SWITCH

                                                            781 WORKING

                                                            The most familiar form of switch is a manually operated

                                                            electromechanical device with one or more sets of electrical contacts

                                                            Each set of contacts can be in one of two states either closed meaning

                                                            the contacts are touching and electricity can flow between them or

                                                            open meaning the contacts are separated and the switch is non

                                                            conducting The mechanism actuating the transition between these two

                                                            states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                            momentary (push-for on or push-for off) type

                                                            782 USES

                                                            In electronics a switch is an electrical component that can break an electrical

                                                            circuit interrupting the current or diverting it from one conductor to another

                                                            783 TESTING

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                            no connection Switch can tested by using multimeter in continuity range

                                                            79 DARLINGTON PAIR IC (ULN2003a)

                                                            791 WORKING

                                                            The Darlington transistor (often called a Darlington pair) is a

                                                            compound structure consisting of two bipolar transistors (either

                                                            integrated or separated devices) connected in such a way that the

                                                            current amplified by the first transistor is amplified further by the

                                                            second one This configuration gives a much higher current gain than

                                                            each transistor taken separately and in the case of integrated devices

                                                            can take less space than two individual transistors because they can

                                                            use a shared collector

                                                            Integrated Darlington pairs come packaged singly in

                                                            transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                            The Darlington transistor array used is ULN2003 Applications include relay

                                                            drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                            drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                            to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                            for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                            792 FEATURES

                                                            The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                            transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                            with common-cathode clamp diodes for switching inductive loads The collector-current

                                                            rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                            higher current capability

                                                            710 SERIES VOLTAGE REGULATER IC (78XX)

                                                            7101 WORKING

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Voltage Regulator (regulator) usually having three legs converts varying input

                                                            voltage and produces a constant regulated output voltage They are available in a variety of

                                                            outputs

                                                            The most common part numbers start with the numbers 78 or 79 and finish with two

                                                            digits indicating the output voltage The number 78 represents positive voltage and 79

                                                            negative one The 78XX series of voltage regulators are designed for positive input

                                                            The LM78XX series typically has the ability to drive current up to 1A For

                                                            application requirements up to 150mA 78LXX can be used As mentioned above the

                                                            component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                            an output leg with the regulators voltage

                                                            As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                            voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                            difference between the input and output appears as heat If the input voltage is unnecessarily

                                                            high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                            sinking the regulator will shut down

                                                            711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                            7111 WORKING

                                                            The MAX-232 It includes a Charge Pump which generates

                                                            +10V and -10V from a single 5v supply

                                                            This IC also includes two receivers and two transmitters in

                                                            the same package This is handy in many cases when we only want to

                                                            use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                            receive line and one for the transmit There are also many variations of these devices The

                                                            large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                            available which use smaller capacitors and even some with inbuilt capacitors However the

                                                            MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                            Dual Charge-Pump Voltage Converter

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                            V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                            output

                                                            712 OPTOCOUPLER IC (4N33)

                                                            7121 WORKING

                                                            In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                            photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                            between elements of a circuit typically a transmitter and a receiver while keeping them

                                                            electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                            back to an electrical signal electrical contact along the path is broken

                                                            Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                            essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                            arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                            light-triggered diac The two are separated by a transparent barrier which blocks any

                                                            electrical current flow between the two but does allow the passage of light

                                                            The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                            silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                            of isolation between driving and load circuits These Optocouplers can be used to replace

                                                            reed and mercury relays with advantages of long life high speed switching and elimination

                                                            of magnetic field

                                                            713 MICROCONTROLLER IC (89V51 RD 2 )

                                                            713 WORKING

                                                            The P89V51RD2 is an 80C51 microcontroller with 64

                                                            kB Flash and 1024 bytes of data RAM

                                                            A key feature of the P89V51RD2 is its X2 mode option

                                                            The design engineer can choose to run the application with the conventional 80C51 clock

                                                            rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                            feature is to keep the same performance by reducing the clock frequency by half thus

                                                            dramatically reducing the EMI

                                                            The Flash program memory supports both parallel programming and in serial In-

                                                            System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                            speed reducing programming costs and time to market ISP allows a device to be

                                                            reprogrammed in the end product under software control The capability to fieldupdate the

                                                            application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                            In-Application Programmable (IAP) allowing the Flash program memory to be

                                                            reconfigured even while the application is running

                                                            714 RELIMATE CONNECTOR

                                                            7141 WORKING

                                                            These are wire to board type connectors used to facilitate

                                                            proper and firm electrical connection between the relay card and

                                                            microcontroller card

                                                            The connector has following specifications

                                                            No of Ways 2-20

                                                            Voltage Rating 250V AC DC

                                                            Current Rating 3A AC DC

                                                            Contact Resistance 20mW max

                                                            Insulation Resistance 1000MW min

                                                            Dielectric Withstanding 1000V ACminute

                                                            Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                            The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                            connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                            conflicts

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            715 RS-232 PORT CONNECTOR

                                                            7151 WORKING

                                                            Almost all digital devices which we use require either TTL

                                                            or CMOS logic levels Therefore the first step to connecting a

                                                            device to the RS-232 port is to transform the RS-232 levels back

                                                            into 0 and 5 Volts This is done by RS-232 Level Converters

                                                            Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                            Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                            The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                            problem in many instances where only a single supply of +5V is present

                                                            CHAPTER 8

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            IMPLIMENTATION

                                                            OF THE PCB

                                                            Components layout designing

                                                            Developing or Etching the PCB

                                                            Other operations like Drilling Cutting Tinning

                                                            81 IMPLIMENTATION OF THE PCB

                                                            A proper PCB ensure that various circuit components are interconnected as per the

                                                            circuit diagram once they have been placed on the PCB in their proper positions and

                                                            subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                            base material to which is permanently attached a flat metallic network of conducting path

                                                            whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                            for this project is single one

                                                            The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                            board configuration however is most widely used and it may be of the nature of the single

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                            which ensures adequate and permanent low resistance coupling

                                                            811 BOARD DESIGN

                                                            PCB designed is the most important and requires great care during work In this case

                                                            great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                            is designed it is virtually impossible to alter it While designing a circuit designer should

                                                            take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                            unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                            also help to solve this problem when circuit is complicated

                                                            812 THE MASTER DIAGRAM

                                                            The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                            which is commonly made twice as the finished circuit since this makes the working on that

                                                            much easier especially when circuit is complicated photography eventually reduces the

                                                            size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                            the designing -

                                                            a The space between the conductors must be strictly controlled to avoid the possibility

                                                            of electrical discharges or unwanted capacitance The amount by which the mater

                                                            diagram is to reduce in size is thus a critical deign feature

                                                            b The conductor must be wider in those part of the circuits that are going to handle

                                                            large current must be handle without undue temperature of conductors

                                                            c The minimum width of copper should not generally be less than about 15mmThis

                                                            is related to mechanical strength rather than electrical properties and it also ensure

                                                            that strips remains securely bounded to the base material

                                                            d The points where the component holes for component lead wire occurs must be sited

                                                            to suit the dimensions of the component and dimensions between lead-out wire so

                                                            that the components can be situated correctly on finished board The conductor is

                                                            also main large at the point of holes

                                                            813 PCB MAKING

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            When the mater diagram probable twice the size of real PCB has been evolved the

                                                            test major step consists of etching or dissolving the unwanted metal from copper claded

                                                            board to create a circuit as depicted by master diagram It must be stressed that very

                                                            accurate checking master is essential at this stage Then the master point is mounted on a

                                                            special frame on easy facing of a larger camera and with the aid of the very powerful

                                                            illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                            developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                            brought into operation This comprises the camera body mounted so that sideways after

                                                            each exposure In this way number of copies of the original master diagram is set out

                                                            exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                            In case of simple and need of number of less PCB economic and advisable to use the

                                                            following lab method of PCB making

                                                            Planning The Circuit

                                                            It is not a particular difficult There are several important factors that need not be

                                                            taken into account if the finished device is to work properly we must consider gain factor

                                                            and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                            possibility We must also ensure that conductors and components carrying high frequency

                                                            current are well separated from the part of the circuit We are also to make sure that all

                                                            components need to return to earth are properly connected and that possibility of common

                                                            impedance arising earth returned

                                                            Circuit is totally eliminated by making all earth as substantial possible consistent

                                                            with nature of design Other factors that have to successfully studied include availability of

                                                            adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                            made for mechanical fixing ventilation effect of vibration

                                                            Cleaning The Board

                                                            The copper side of the board must be thoroughly cleaned before circuit plan is

                                                            transferred to it This is important because even slightest trace of graze (from figure of

                                                            instance) will impure the etching process and when the circuit plan has been neatly

                                                            transferred to copper in this manner the board is held under running tap and the allowed to

                                                            dry before resist is applied

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Transforming the Plan

                                                            Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                            A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                            board and working plan and carefully trace the lines of original plan with a ball pen

                                                            Resist

                                                            Resist is nothing more than a substrate that is unaffected by presence etching

                                                            chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                            clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                            covered when resists the leaguer type of paints possess good resist properties but

                                                            disadvantage of relatively long time taken for drying It is essential to resist through

                                                            hardening before etching is started Nail polished are better as they quickly and are less

                                                            difficult to remove

                                                            To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                            PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                            short circulating due to paints are completely the avoid etching tapes and pads are available

                                                            in different sizes

                                                            Correcting Error

                                                            When a result has been thoroughly hardened any errors that have been made can

                                                            usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                            edges of copper conductors on board the resist must be applied with steady band

                                                            Etching

                                                            Next comes etching of unwanted copper amp whether a small single is all that is

                                                            required as quantity of board to be produce certain precautions must be taken before

                                                            operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                            quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                            etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                            grams of water

                                                            Agitation

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                            the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                            laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                            gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                            temperature and thickness of copper foil

                                                            Finishing Off

                                                            When all unwanted copper is dissolved from areas between conductor board should

                                                            be taken from an etchant amp washed in water The resist must be removed using proper

                                                            solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                            seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                            PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                            This process is called Tinning This process of coating involve track with soldier

                                                            Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                            ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                            Assembling On PCB

                                                            After the holes are drilled the component have to be assembled on PCB before

                                                            assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                            accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                            repetitive use cleans soldering iron

                                                            CHAPTER 9

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            SOLDERING

                                                            TECHNIQUE

                                                            Technique for good soldering

                                                            91 SOLDERING TECHNIQUE

                                                            For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                            oxide film or dirt on it If required flux is applied on the points to be soldered

                                                            Now the joint to be soldered is heated with the help of soldering iron Heat

                                                            applied should be such that when solder wire is touched to joint it must melt

                                                            quickly

                                                            The joint and the soldering iron is held such that molten solder should flow

                                                            smoothly over the joint

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            When joint is completely covered with molten solder the soldering iron is re-

                                                            moved

                                                            The joint is allowed to cool without any movement

                                                            The bright shining solder indicates good soldering

                                                            In case of dry solder joint a air gap remains in between the solder material and

                                                            the joint It means that soldering is improper This is removed and again solder-

                                                            ing is done

                                                            Thus this way all the components are soldered on P C B

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 10

                                                            PCB LAYOUTS

                                                            Schematic diagram

                                                            Bottom and top layout

                                                            101 POWER SUPPLY CARD

                                                            1011 SCHIMETIC DIAGRAM

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1012 LEGEND MARKING

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                            Fig1011 Schematic diagram of power supply card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1013TOP LAYER

                                                            1014 BOTTOM LAYER

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                            Fig1013 Top layer of power supply

                                                            card

                                                            Fig1014 Schematic diagram of power supply card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            102 BATTERY CHARGER CARD

                                                            1021 SCHEMATIC DIAGRAM

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                            Fig1021 Schematic diagram of battery charger card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            103 RELAY CARD

                                                            1031 SCHIMETIC DIAGRAM

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                            Fig1031 Schematic diagram of Relay card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1032 RELAY CARD LEGEND MARKING

                                                            1033 TOP LAYER

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                            Fig1032 Legend marking of Relay card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1034 BOTTOM LAYER

                                                            104 MICROCONTROLER CARD

                                                            1041 SCHIMETIC DIAGRAM

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                            Fig1034 Bottom layer of Relay card

                                                            Fig1041 Schematic diagram of microcontroller card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1042 ALL LAYERS

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                            Fig1042 All layer of microcontroller card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 11

                                                            INTRODUCTION

                                                            OF SOFTWARE

                                                            Keil (microVision 2)

                                                            Eagle (Easily Applicable Graphical Layout Editor)

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            111 Keil (microVision 2)

                                                            1111 Introduction to C51 Cross Compiler

                                                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                            generates object code that matches the efficiency and speed of assembly programming

                                                            Using a high-level language like C has many advantages over assembly language

                                                            programming

                                                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                            the memory structure of the 8051 CPU is desirable (but not necessary)

                                                            Details like register allocation and addressing of the various memory types and data

                                                            types is managed by the compiler

                                                            Programs get a formal structure (which is imposed by the C programming language) and

                                                            can be divided into separate functions This contributes to source code reusability as

                                                            well as better overall application structure

                                                            The ability to combine variable selection with specific operations improves program

                                                            readability

                                                            Keywords and operational functions that more nearly resemble the human thought

                                                            process may be used

                                                            Programming and program test time is drastically reduced

                                                            The C run-time library contains many standard routines such as formatted output

                                                            numeric conversions and floating-point arithmetic

                                                            Existing program parts can be more easily included into new programs because of

                                                            modular program construction techniques

                                                            The language C is a very portable language (based on the ANSI standard) that enjoys

                                                            wide popular support and is easily obtained for most systems Existing program

                                                            investments can be quickly adapted to other processors as needed

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1112 Software Development Cycle in Keil

                                                            When we use the Keil Software tools the

                                                            project development cycle is roughly the same as

                                                            it is for any other software development project

                                                            1 Create a project select the target chip from the

                                                            device database and configure the tool settings

                                                            2 Create source files in C or assembly

                                                            3 Build your application with the project

                                                            manager

                                                            4 Correct errors in source files

                                                            5 Test the linked application A block diagram of

                                                            the complete 8051 tool set may best illustrate the

                                                            development cycle

                                                            112 Eagle (Easily Applicable Graphical Layout Editor)

                                                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                            1121 Schematic Editor

                                                            In this one can develop amp design circuits for the required PCB

                                                            1122 Layout Editor

                                                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                            Fig 111 Software development in KEIL

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1123 Library Editor

                                                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                            1124 Auto Router

                                                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                            the PCB tracks designed

                                                            1125 Cam Processor

                                                            This is used to finally print the various layers of the designed PCB viz Top Layer

                                                            Bottom Layer Component Layer Masking Layer etc

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                            Start

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 12

                                                            INTRODUCTION

                                                            OF

                                                            PROGRAMMING

                                                            Flowchart of programming

                                                            Program code

                                                            121 Flowchart

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                            2

                                                            flag9==1

                                                            flag9=1

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                            flag11==1

                                                            flag11=1 flag11=0 flag4=0

                                                            REady_LED4=0

                                                            Sw2_op (P01) ==0

                                                            My delay (10)

                                                            3 3

                                                            flag2=1 disp2=1 k2=0

                                                            3

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                            4

                                                            flag11==1

                                                            flag11=0 flag4=0 REady_LED4=0

                                                            flag11=1

                                                            My delay (10)

                                                            flag3=1 disp3=1 k3=0

                                                            k1==0||k2==0||k4==0

                                                            Sw3_op (P02) ==0

                                                            5

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                            flag5==1

                                                            5

                                                            flag11==1

                                                            flag7=1

                                                            flag7==1

                                                            flag7=0 flag2=0 REady_LED2=0

                                                            6

                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                            flag11=0 flag4=0 REady_LED4=0

                                                            flag11=1

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                            6

                                                            My delay (10)

                                                            flag4=1 disp4=1 k4=0

                                                            k1==0||k2==0||k3==0 flag5==1

                                                            7

                                                            Sw4_op (P03) ==0

                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                            7

                                                            flag7==1

                                                            flag9==1

                                                            flag7=1

                                                            flag7=0 flag2=0 REady_LED2=0

                                                            flag9=0 flag3=0 REady_LED3=0

                                                            flag9=1

                                                            Sw5_op A(P04) ==0

                                                            My delay (10)

                                                            8

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                            9

                                                            flag2==1

                                                            flag3==1

                                                            8

                                                            flag1==1

                                                            flag4==1 flag5=1 disp5=1

                                                            flag9=1 disp5=1

                                                            flag7=1 disp5=1

                                                            flag11=1 disp5=1

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                            Sw6_op (P05) ==0

                                                            My delay (10)

                                                            flag2==1 ampamp flag7==1

                                                            flag3==1 ampamp flag9==1 9

                                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                            flag8=1 disp6=1

                                                            10

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                            10

                                                            flag4==1 ampamp flag11==1

                                                            flag10=1 disp6=1

                                                            flag12=1 disp6=1

                                                            flag8==1

                                                            flag10==1

                                                            11

                                                            flag6==1

                                                            i++

                                                            l++

                                                            j++

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                            flag12==1

                                                            M++

                                                            11

                                                            Stop

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            122 Program

                                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                            define buzzerP2_0 buzzer indication

                                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                            sbit sw5_op=P0^4 input switch5 for coin

                                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                            output Led for indication

                                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                            function prototype declaration

                                                            void my_delay(unsigned int value) DELAY FUCTION

                                                            void init_timer() timer 0 initialization function

                                                            variable declaration

                                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            start of main programme

                                                            void main()

                                                            init_timer() call it timer initialization function

                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                            start of while loop

                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                            condition for switch1

                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                            if(iltk) loop will repeat for desired time of charging

                                                            if(igt=1000)

                                                            buzzer=1 turn on buzzer if (ii==20)

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            REady_LED1=1 turn on ready indication of led1

                                                            else if(ii==40)

                                                            REady_LED1=0ii=0

                                                            elseREady_LED1=0

                                                            START_LED1=1

                                                            else

                                                            START_LED1=0

                                                            k1=1 buzzer=0

                                                            REady_LED1=0 flag1=0

                                                            flag5=0flag6=0

                                                            condition for switch2

                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                            REady_LED2=1 turn on ready 2 led indication

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            disp2=0

                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                            if(jltk)

                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                            elseREady_LED2=0

                                                            START_LED2=1

                                                            else START_LED2=0

                                                            REady_LED2=0 k2=1 buzzer=0

                                                            flag2=0flag7=0flag8=0

                                                            j=0jj=0

                                                            condition for switch 3

                                                            if(flag3==1) check swich3 pressed

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            if(disp3==1 )

                                                            REady_LED3=1 disp3=0

                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                            if(lltk)

                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                            elseREady_LED3=0

                                                            START_LED3=1

                                                            else START_LED3=0

                                                            LED2=0 k3=1 buzzer=0

                                                            REady_LED3=0 flag3=0

                                                            flag9=0flag10=0

                                                            l=0ll=0

                                                            condition for switch 4

                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            REady_LED4=1 disp4=0

                                                            if(flag11==1) check coin is pressed

                                                            if(flag12==1) START is pressed

                                                            if(mltk)

                                                            if(mgt1000)

                                                            buzzer=1 if(mm==20)

                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                            elseREady_LED4=0

                                                            START_LED4=1

                                                            else START_LED4=0

                                                            buzzer=0 k4=1

                                                            REady_LED4=0 flag4=0

                                                            flag11=0flag12=0

                                                            m=0mm=0

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            while(1)

                                                            end of main programme

                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                            whenever specific time the interrupt will generate control will go in following function

                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if(sw1_op==0 ) ready switch flag for system1

                                                            my_delay(10) CALL DELAY FUNCTION

                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                            if(flag7==1) SET THE FLAG

                                                            flag7=1

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                            flag9=1

                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                            flag11=1

                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if(sw2_op==0 ) fready switch flag for system2

                                                            my_delay (10)

                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                            if(flag5==1)

                                                            flag5=1

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                            flag9=1

                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                            flag11=1

                                                            elseflag11=0flag4=0REady_LED4=0

                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                            if(flag7==1)

                                                            flag7=1

                                                            else

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                            flag5=1

                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                            flag11=1

                                                            elseflag11=0flag4=0REady_LED4=0

                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                            if(flag7==1)

                                                            flag7=1

                                                            elseflag7=0

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                            flag5=1

                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                            flag9=1

                                                            elseflag9=0flag3=0REady_LED3=0

                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                            if(flag6==1)

                                                            i++ if (igt1000) ii++

                                                            if (flag8==1)

                                                            j++ if(jgt1000) jj++

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            if (flag10==1)

                                                            l++ if (lgt1000) ll++

                                                            if (flag12==1)

                                                            m++ if (mgt1000) mm++

                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 13

                                                            TROUBLE SHOOT

                                                            Troubleshoot

                                                            131 TROUBLE SHOOT

                                                            A newly assembled circuit does not work may be due to -

                                                            Faulty components

                                                            Improper soldering

                                                            Wrong connections

                                                            Also any stop in working after some period may be due to -

                                                            Component failure

                                                            Supply failure

                                                            Damaging of PCB

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Fault finding is very essential if you want the circuit to operate properly

                                                            If a newly assembled circuit is not working properly check all the components and

                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                            proper soldering

                                                            If faults are not observed during physical observations one should proceed for Hot

                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                            Resistance measurement is also done which is known as Dry test

                                                            During this project work some green LEDs was not glow then we checked it

                                                            continuity and replace it

                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                            heated after starting the project It happens because of some soldering points are shorted

                                                            during soldering PCB We solved that problem

                                                            CHAPTER 14

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            ADVANTAGES OF

                                                            THE PROJECT

                                                            Advantages

                                                            141 ADVANTAGES OF THE PROJECT

                                                            Simple and hand efficient Microcontroller based system

                                                            Fast charging capacity

                                                            Simple to operate

                                                            Ease of mobility

                                                            Facilitates connectivity for 90 of cellular phones

                                                            Less expensive

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Reduced man power

                                                            Low power consumption

                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                            CHAPTER 15

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            DISADVANTAGES

                                                            OF THE PROJECT

                                                            Disadvantages

                                                            151 DISADVANTAGES OF THE PROJECT

                                                            It requires mains supply to work project

                                                            Due to limited charging channels till now there may be a possibility that

                                                            mobile phones of few brands cannot be connected for charging For this

                                                            purpose we have to use separate connectors for that specific brand differently

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                            min

                                                            It does not have battery backup therefore it cannot be portable

                                                            CHAPTER 16

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            APPLICATIONS OF

                                                            THE PROJECT

                                                            Application

                                                            161 APPLICATIONS OF THE PROJECT

                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                            charge for the mobile phone in any places

                                                            It is used for emergency charging purposes

                                                            It can be installed in malls railway stations bus stops and other public

                                                            places

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            The charger offers a unique revenue opportunity for a vast range of

                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                            any location where there is a high footfall creating a large number of

                                                            potential users

                                                            It can be installed in offices and collages for pay charging facility

                                                            CHAPTER 17

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            FUTURE

                                                            DEVELOPMENT OF

                                                            THE PROJECT

                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                            This project is very useful to people who are using mobile phone without charging

                                                            condition in public places

                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                            It will provide battery backup for make it portable

                                                            It will also provide SMS system in future

                                                            We can also increase the charging time by editing software of the project

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 18

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            COST ANALYSIS

                                                            OF THE PROJECT

                                                            COST ANALYSIS OF THE PROJECT

                                                            181 COST ANALYSIS OF THE PROJECT

                                                            1811 Component list for power supply card

                                                            Footprint Quantity Designators Rate

                                                            Resistor

                                                            22K 1 R2 1

                                                            1K 1 R1 1

                                                            Capacitor

                                                            1000uf25V 1 C5 10

                                                            2200uf25V 1 C1 10

                                                            022uf 2 C6 C2 1

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                            Table 1811 Component list for power supply card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            01uf 2 C4 C3 1

                                                            IC

                                                            BRIDGE W10 2 BR2 BR1 10

                                                            L7812CV (TO-220) 1 U2 8

                                                            L7805CV (TO-220) 1 U1 8

                                                            Connector

                                                            CON PHO 2PIN 2 J3 J2 16

                                                            CON PHO 3PIN 1 J1 12

                                                            LED3mm red 2 L1 L2 15

                                                            Heat sink (TO-220) 2 16

                                                            Total 955

                                                            1812 Component list for battery charger card

                                                            Footprint Quantity Rate

                                                            Capacitor

                                                            2200uf25V 1 1000

                                                            022uf 4 100

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            01uf 4 100

                                                            IC

                                                            BRIDGE W10 1 500

                                                            L7805CV (TO-220) 4 3200

                                                            Connector

                                                            CON PHO 2PIN 1 800

                                                            Relimate 2 pin 1 400

                                                            relimate 3 pin 4 2000

                                                            Heat sink (TO-220) 4 1200

                                                            TOTAL 9300

                                                            1813 Component list for Relay card

                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                            Table 1812Component list for battery charger card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                            Total 18900

                                                            1814Component list for controller card

                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                            Table 1813Component list for relay card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                            total 27000

                                                            1815 Miscellaneous material

                                                            Material Quantity Rate

                                                            electronic item

                                                            Transformer

                                                            TXR1 0-9-15 1 20000

                                                            0-9 1A

                                                            0-15 100mA

                                                            TXR2 0-9 1 16500

                                                            0-9 1A

                                                            Proximity switch 1 20000

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                            Table 1814Component list for microcontroller card

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Red push bottom 4 4000

                                                            Green push button 1 1000

                                                            Red led 5mm 4 800

                                                            Green led 5mm 4 800

                                                            Led holder 8 1600

                                                            Copper clad 2 4000

                                                            3 core cable 1 meter 1500

                                                            3 pin plug 1 3000

                                                            2 pin relimate wire 19 9000

                                                            3 pin relimate wire 5 3750

                                                            4 pin relimate wire 2 2000

                                                            mechanical items

                                                            Enclosure 1 25000

                                                            Acrylic sheet 2 X 1 30000

                                                            12mm cable gland 1 1000

                                                            Screw 3mm 33 2000

                                                            Screw 35mm 6 2400

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            10 mm spacers 100 1500

                                                            10mm insert to stud 50 10000

                                                            cable tie 2500

                                                            Total 162350

                                                            CHAPTER 19

                                                            APPENDIX

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                            Table 1815Component list for miscellaneous material

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            APPENDIX

                                                            191 APPENDIX

                                                            1911 78xx IC datasheet

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                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1912 W10 datasheet

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1913 4n33 IC datasheet

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                            1914 MAX 232

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                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1915 ULN2003a IC datasheet

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            1916 89V51RD2 IC datasheet

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 20

                                                            CONCLUSION

                                                            CONCLUSION

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                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            201 CONCLUSION

                                                            The coin-operated mobile phone charger is already successfully installed in

                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                            installed in any business premises

                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                            a high footfall creating a large number of potential users

                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                            extend low mobile phone talk time provide battery charging

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 21

                                                            IMAGES OF THE

                                                            PROJECT

                                                            Images of the project

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            211 IMAGES OF THE PROJECT

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                            fig211 lsquoCoin operated mobile battery charger

                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Fig 216 Relay driver circuit

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                            Fig 213 Constant voltage battery charger circuit

                                                            Fig214 Power supply circuit

                                                            Fig215 Metal detector proximity switch

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Fig217 Microcontroller circuit

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            Fig228 coin operated mobile battery charger project presentation

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            CHAPTER 22

                                                            BIBILOGRAPHY

                                                            BIBLIOGRAPHY

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                            221 BIBLIOGRAPHY

                                                            BOOKS

                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                            INTERNET LINKS

                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                            • CHAPTER 1

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              By appropriate selection of the numbers of turns a transformer thus allows an

                                                              alternating voltage to be stepped up mdash by making NS more than NP mdash or stepped down by

                                                              making it less

                                                              752 TESTING

                                                              1 The ohm meter is the deciding factor Putting the ohm meter on the lowest

                                                              scale and then adjusting the knob to verify its reading is an easy step to the

                                                              reading of the ohm

                                                              2 To check the resistance of the coil unplug or unsolder the leads of the

                                                              transformer from its circuit and measure the resistance of each coil

                                                              3 The next step is to test each coil for shorts to other coils

                                                              76 RECTIFIER BRIDGE (W 10)

                                                              761 WORKING

                                                              A diode bridge rectifier is a device for converting AC or

                                                              alternating current electricity into DC or direct current AC

                                                              electricity goes from positive to negative constantly whereas DC

                                                              always flows in the same direction

                                                              AC electricity is more efficient to transmit and easier to

                                                              convert into different voltages However most appliances need DC current to run A diode

                                                              bridge rectifier is the most common type of power supply used to provide this current In

                                                              our project W10 is a bridge rectifier which provides on single semiconductor chip

                                                              77 OSCILLATOR

                                                              771 Working

                                                              An oscillator puts out an endless series of pulses The output

                                                              constantly goes from 0 volts to Vcc and back to 0 volts again Almost

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 31

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              all digital circuits have some type of oscillator This stream of output pulses is often

                                                              called a clock One of the most important features of any oscillator is its frequency stability

                                                              or in other words its ability to provide a constant frequency output under varying load

                                                              conditions Some of the factors that affect the frequency stability of an oscillator include

                                                              temperature variations in the load and changes in the DC power supply Frequency stability

                                                              of the output signal can be improved by the proper selection of the components used for the

                                                              resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                              be obtained from normal LC and RC tank circuits

                                                              In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                              divided to give you exact clock rates for most of the common baud rates for the UART

                                                              especially for the higher speeds (9600 19200) These crystals are readily available and

                                                              commonly used

                                                              78 SWITCH

                                                              781 WORKING

                                                              The most familiar form of switch is a manually operated

                                                              electromechanical device with one or more sets of electrical contacts

                                                              Each set of contacts can be in one of two states either closed meaning

                                                              the contacts are touching and electricity can flow between them or

                                                              open meaning the contacts are separated and the switch is non

                                                              conducting The mechanism actuating the transition between these two

                                                              states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                              momentary (push-for on or push-for off) type

                                                              782 USES

                                                              In electronics a switch is an electrical component that can break an electrical

                                                              circuit interrupting the current or diverting it from one conductor to another

                                                              783 TESTING

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                              no connection Switch can tested by using multimeter in continuity range

                                                              79 DARLINGTON PAIR IC (ULN2003a)

                                                              791 WORKING

                                                              The Darlington transistor (often called a Darlington pair) is a

                                                              compound structure consisting of two bipolar transistors (either

                                                              integrated or separated devices) connected in such a way that the

                                                              current amplified by the first transistor is amplified further by the

                                                              second one This configuration gives a much higher current gain than

                                                              each transistor taken separately and in the case of integrated devices

                                                              can take less space than two individual transistors because they can

                                                              use a shared collector

                                                              Integrated Darlington pairs come packaged singly in

                                                              transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                              The Darlington transistor array used is ULN2003 Applications include relay

                                                              drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                              drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                              to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                              for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                              792 FEATURES

                                                              The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                              transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                              with common-cathode clamp diodes for switching inductive loads The collector-current

                                                              rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                              higher current capability

                                                              710 SERIES VOLTAGE REGULATER IC (78XX)

                                                              7101 WORKING

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Voltage Regulator (regulator) usually having three legs converts varying input

                                                              voltage and produces a constant regulated output voltage They are available in a variety of

                                                              outputs

                                                              The most common part numbers start with the numbers 78 or 79 and finish with two

                                                              digits indicating the output voltage The number 78 represents positive voltage and 79

                                                              negative one The 78XX series of voltage regulators are designed for positive input

                                                              The LM78XX series typically has the ability to drive current up to 1A For

                                                              application requirements up to 150mA 78LXX can be used As mentioned above the

                                                              component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                              an output leg with the regulators voltage

                                                              As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                              voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                              difference between the input and output appears as heat If the input voltage is unnecessarily

                                                              high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                              sinking the regulator will shut down

                                                              711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                              7111 WORKING

                                                              The MAX-232 It includes a Charge Pump which generates

                                                              +10V and -10V from a single 5v supply

                                                              This IC also includes two receivers and two transmitters in

                                                              the same package This is handy in many cases when we only want to

                                                              use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                              receive line and one for the transmit There are also many variations of these devices The

                                                              large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                              available which use smaller capacitors and even some with inbuilt capacitors However the

                                                              MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                              Dual Charge-Pump Voltage Converter

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                              V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                              output

                                                              712 OPTOCOUPLER IC (4N33)

                                                              7121 WORKING

                                                              In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                              photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                              between elements of a circuit typically a transmitter and a receiver while keeping them

                                                              electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                              back to an electrical signal electrical contact along the path is broken

                                                              Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                              essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                              arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                              light-triggered diac The two are separated by a transparent barrier which blocks any

                                                              electrical current flow between the two but does allow the passage of light

                                                              The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                              silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                              of isolation between driving and load circuits These Optocouplers can be used to replace

                                                              reed and mercury relays with advantages of long life high speed switching and elimination

                                                              of magnetic field

                                                              713 MICROCONTROLLER IC (89V51 RD 2 )

                                                              713 WORKING

                                                              The P89V51RD2 is an 80C51 microcontroller with 64

                                                              kB Flash and 1024 bytes of data RAM

                                                              A key feature of the P89V51RD2 is its X2 mode option

                                                              The design engineer can choose to run the application with the conventional 80C51 clock

                                                              rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                              feature is to keep the same performance by reducing the clock frequency by half thus

                                                              dramatically reducing the EMI

                                                              The Flash program memory supports both parallel programming and in serial In-

                                                              System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                              speed reducing programming costs and time to market ISP allows a device to be

                                                              reprogrammed in the end product under software control The capability to fieldupdate the

                                                              application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                              In-Application Programmable (IAP) allowing the Flash program memory to be

                                                              reconfigured even while the application is running

                                                              714 RELIMATE CONNECTOR

                                                              7141 WORKING

                                                              These are wire to board type connectors used to facilitate

                                                              proper and firm electrical connection between the relay card and

                                                              microcontroller card

                                                              The connector has following specifications

                                                              No of Ways 2-20

                                                              Voltage Rating 250V AC DC

                                                              Current Rating 3A AC DC

                                                              Contact Resistance 20mW max

                                                              Insulation Resistance 1000MW min

                                                              Dielectric Withstanding 1000V ACminute

                                                              Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                              The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                              connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                              conflicts

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              715 RS-232 PORT CONNECTOR

                                                              7151 WORKING

                                                              Almost all digital devices which we use require either TTL

                                                              or CMOS logic levels Therefore the first step to connecting a

                                                              device to the RS-232 port is to transform the RS-232 levels back

                                                              into 0 and 5 Volts This is done by RS-232 Level Converters

                                                              Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                              Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                              The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                              problem in many instances where only a single supply of +5V is present

                                                              CHAPTER 8

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              IMPLIMENTATION

                                                              OF THE PCB

                                                              Components layout designing

                                                              Developing or Etching the PCB

                                                              Other operations like Drilling Cutting Tinning

                                                              81 IMPLIMENTATION OF THE PCB

                                                              A proper PCB ensure that various circuit components are interconnected as per the

                                                              circuit diagram once they have been placed on the PCB in their proper positions and

                                                              subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                              base material to which is permanently attached a flat metallic network of conducting path

                                                              whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                              for this project is single one

                                                              The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                              board configuration however is most widely used and it may be of the nature of the single

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                              which ensures adequate and permanent low resistance coupling

                                                              811 BOARD DESIGN

                                                              PCB designed is the most important and requires great care during work In this case

                                                              great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                              is designed it is virtually impossible to alter it While designing a circuit designer should

                                                              take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                              unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                              also help to solve this problem when circuit is complicated

                                                              812 THE MASTER DIAGRAM

                                                              The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                              which is commonly made twice as the finished circuit since this makes the working on that

                                                              much easier especially when circuit is complicated photography eventually reduces the

                                                              size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                              the designing -

                                                              a The space between the conductors must be strictly controlled to avoid the possibility

                                                              of electrical discharges or unwanted capacitance The amount by which the mater

                                                              diagram is to reduce in size is thus a critical deign feature

                                                              b The conductor must be wider in those part of the circuits that are going to handle

                                                              large current must be handle without undue temperature of conductors

                                                              c The minimum width of copper should not generally be less than about 15mmThis

                                                              is related to mechanical strength rather than electrical properties and it also ensure

                                                              that strips remains securely bounded to the base material

                                                              d The points where the component holes for component lead wire occurs must be sited

                                                              to suit the dimensions of the component and dimensions between lead-out wire so

                                                              that the components can be situated correctly on finished board The conductor is

                                                              also main large at the point of holes

                                                              813 PCB MAKING

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              When the mater diagram probable twice the size of real PCB has been evolved the

                                                              test major step consists of etching or dissolving the unwanted metal from copper claded

                                                              board to create a circuit as depicted by master diagram It must be stressed that very

                                                              accurate checking master is essential at this stage Then the master point is mounted on a

                                                              special frame on easy facing of a larger camera and with the aid of the very powerful

                                                              illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                              developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                              brought into operation This comprises the camera body mounted so that sideways after

                                                              each exposure In this way number of copies of the original master diagram is set out

                                                              exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                              In case of simple and need of number of less PCB economic and advisable to use the

                                                              following lab method of PCB making

                                                              Planning The Circuit

                                                              It is not a particular difficult There are several important factors that need not be

                                                              taken into account if the finished device is to work properly we must consider gain factor

                                                              and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                              possibility We must also ensure that conductors and components carrying high frequency

                                                              current are well separated from the part of the circuit We are also to make sure that all

                                                              components need to return to earth are properly connected and that possibility of common

                                                              impedance arising earth returned

                                                              Circuit is totally eliminated by making all earth as substantial possible consistent

                                                              with nature of design Other factors that have to successfully studied include availability of

                                                              adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                              made for mechanical fixing ventilation effect of vibration

                                                              Cleaning The Board

                                                              The copper side of the board must be thoroughly cleaned before circuit plan is

                                                              transferred to it This is important because even slightest trace of graze (from figure of

                                                              instance) will impure the etching process and when the circuit plan has been neatly

                                                              transferred to copper in this manner the board is held under running tap and the allowed to

                                                              dry before resist is applied

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Transforming the Plan

                                                              Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                              A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                              board and working plan and carefully trace the lines of original plan with a ball pen

                                                              Resist

                                                              Resist is nothing more than a substrate that is unaffected by presence etching

                                                              chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                              clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                              covered when resists the leaguer type of paints possess good resist properties but

                                                              disadvantage of relatively long time taken for drying It is essential to resist through

                                                              hardening before etching is started Nail polished are better as they quickly and are less

                                                              difficult to remove

                                                              To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                              PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                              short circulating due to paints are completely the avoid etching tapes and pads are available

                                                              in different sizes

                                                              Correcting Error

                                                              When a result has been thoroughly hardened any errors that have been made can

                                                              usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                              edges of copper conductors on board the resist must be applied with steady band

                                                              Etching

                                                              Next comes etching of unwanted copper amp whether a small single is all that is

                                                              required as quantity of board to be produce certain precautions must be taken before

                                                              operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                              quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                              etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                              grams of water

                                                              Agitation

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                              the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                              laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                              gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                              temperature and thickness of copper foil

                                                              Finishing Off

                                                              When all unwanted copper is dissolved from areas between conductor board should

                                                              be taken from an etchant amp washed in water The resist must be removed using proper

                                                              solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                              seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                              PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                              This process is called Tinning This process of coating involve track with soldier

                                                              Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                              ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                              Assembling On PCB

                                                              After the holes are drilled the component have to be assembled on PCB before

                                                              assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                              accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                              repetitive use cleans soldering iron

                                                              CHAPTER 9

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              SOLDERING

                                                              TECHNIQUE

                                                              Technique for good soldering

                                                              91 SOLDERING TECHNIQUE

                                                              For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                              oxide film or dirt on it If required flux is applied on the points to be soldered

                                                              Now the joint to be soldered is heated with the help of soldering iron Heat

                                                              applied should be such that when solder wire is touched to joint it must melt

                                                              quickly

                                                              The joint and the soldering iron is held such that molten solder should flow

                                                              smoothly over the joint

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              When joint is completely covered with molten solder the soldering iron is re-

                                                              moved

                                                              The joint is allowed to cool without any movement

                                                              The bright shining solder indicates good soldering

                                                              In case of dry solder joint a air gap remains in between the solder material and

                                                              the joint It means that soldering is improper This is removed and again solder-

                                                              ing is done

                                                              Thus this way all the components are soldered on P C B

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 10

                                                              PCB LAYOUTS

                                                              Schematic diagram

                                                              Bottom and top layout

                                                              101 POWER SUPPLY CARD

                                                              1011 SCHIMETIC DIAGRAM

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1012 LEGEND MARKING

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                              Fig1011 Schematic diagram of power supply card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1013TOP LAYER

                                                              1014 BOTTOM LAYER

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                              Fig1013 Top layer of power supply

                                                              card

                                                              Fig1014 Schematic diagram of power supply card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              102 BATTERY CHARGER CARD

                                                              1021 SCHEMATIC DIAGRAM

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                              Fig1021 Schematic diagram of battery charger card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              103 RELAY CARD

                                                              1031 SCHIMETIC DIAGRAM

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                              Fig1031 Schematic diagram of Relay card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1032 RELAY CARD LEGEND MARKING

                                                              1033 TOP LAYER

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                              Fig1032 Legend marking of Relay card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1034 BOTTOM LAYER

                                                              104 MICROCONTROLER CARD

                                                              1041 SCHIMETIC DIAGRAM

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                              Fig1034 Bottom layer of Relay card

                                                              Fig1041 Schematic diagram of microcontroller card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1042 ALL LAYERS

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                              Fig1042 All layer of microcontroller card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 11

                                                              INTRODUCTION

                                                              OF SOFTWARE

                                                              Keil (microVision 2)

                                                              Eagle (Easily Applicable Graphical Layout Editor)

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              111 Keil (microVision 2)

                                                              1111 Introduction to C51 Cross Compiler

                                                              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                              generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                              generates object code that matches the efficiency and speed of assembly programming

                                                              Using a high-level language like C has many advantages over assembly language

                                                              programming

                                                              Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                              the memory structure of the 8051 CPU is desirable (but not necessary)

                                                              Details like register allocation and addressing of the various memory types and data

                                                              types is managed by the compiler

                                                              Programs get a formal structure (which is imposed by the C programming language) and

                                                              can be divided into separate functions This contributes to source code reusability as

                                                              well as better overall application structure

                                                              The ability to combine variable selection with specific operations improves program

                                                              readability

                                                              Keywords and operational functions that more nearly resemble the human thought

                                                              process may be used

                                                              Programming and program test time is drastically reduced

                                                              The C run-time library contains many standard routines such as formatted output

                                                              numeric conversions and floating-point arithmetic

                                                              Existing program parts can be more easily included into new programs because of

                                                              modular program construction techniques

                                                              The language C is a very portable language (based on the ANSI standard) that enjoys

                                                              wide popular support and is easily obtained for most systems Existing program

                                                              investments can be quickly adapted to other processors as needed

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1112 Software Development Cycle in Keil

                                                              When we use the Keil Software tools the

                                                              project development cycle is roughly the same as

                                                              it is for any other software development project

                                                              1 Create a project select the target chip from the

                                                              device database and configure the tool settings

                                                              2 Create source files in C or assembly

                                                              3 Build your application with the project

                                                              manager

                                                              4 Correct errors in source files

                                                              5 Test the linked application A block diagram of

                                                              the complete 8051 tool set may best illustrate the

                                                              development cycle

                                                              112 Eagle (Easily Applicable Graphical Layout Editor)

                                                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                              1121 Schematic Editor

                                                              In this one can develop amp design circuits for the required PCB

                                                              1122 Layout Editor

                                                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                              Fig 111 Software development in KEIL

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1123 Library Editor

                                                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                              1124 Auto Router

                                                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                              the PCB tracks designed

                                                              1125 Cam Processor

                                                              This is used to finally print the various layers of the designed PCB viz Top Layer

                                                              Bottom Layer Component Layer Masking Layer etc

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                              Start

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 12

                                                              INTRODUCTION

                                                              OF

                                                              PROGRAMMING

                                                              Flowchart of programming

                                                              Program code

                                                              121 Flowchart

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                              2

                                                              flag9==1

                                                              flag9=1

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                              flag11==1

                                                              flag11=1 flag11=0 flag4=0

                                                              REady_LED4=0

                                                              Sw2_op (P01) ==0

                                                              My delay (10)

                                                              3 3

                                                              flag2=1 disp2=1 k2=0

                                                              3

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                              4

                                                              flag11==1

                                                              flag11=0 flag4=0 REady_LED4=0

                                                              flag11=1

                                                              My delay (10)

                                                              flag3=1 disp3=1 k3=0

                                                              k1==0||k2==0||k4==0

                                                              Sw3_op (P02) ==0

                                                              5

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                              flag5==1

                                                              5

                                                              flag11==1

                                                              flag7=1

                                                              flag7==1

                                                              flag7=0 flag2=0 REady_LED2=0

                                                              6

                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                              flag11=0 flag4=0 REady_LED4=0

                                                              flag11=1

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                              6

                                                              My delay (10)

                                                              flag4=1 disp4=1 k4=0

                                                              k1==0||k2==0||k3==0 flag5==1

                                                              7

                                                              Sw4_op (P03) ==0

                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                              7

                                                              flag7==1

                                                              flag9==1

                                                              flag7=1

                                                              flag7=0 flag2=0 REady_LED2=0

                                                              flag9=0 flag3=0 REady_LED3=0

                                                              flag9=1

                                                              Sw5_op A(P04) ==0

                                                              My delay (10)

                                                              8

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                              9

                                                              flag2==1

                                                              flag3==1

                                                              8

                                                              flag1==1

                                                              flag4==1 flag5=1 disp5=1

                                                              flag9=1 disp5=1

                                                              flag7=1 disp5=1

                                                              flag11=1 disp5=1

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                              Sw6_op (P05) ==0

                                                              My delay (10)

                                                              flag2==1 ampamp flag7==1

                                                              flag3==1 ampamp flag9==1 9

                                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                              flag8=1 disp6=1

                                                              10

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                              10

                                                              flag4==1 ampamp flag11==1

                                                              flag10=1 disp6=1

                                                              flag12=1 disp6=1

                                                              flag8==1

                                                              flag10==1

                                                              11

                                                              flag6==1

                                                              i++

                                                              l++

                                                              j++

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                              flag12==1

                                                              M++

                                                              11

                                                              Stop

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              122 Program

                                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                              define buzzerP2_0 buzzer indication

                                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                              sbit sw5_op=P0^4 input switch5 for coin

                                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                              output Led for indication

                                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                              function prototype declaration

                                                              void my_delay(unsigned int value) DELAY FUCTION

                                                              void init_timer() timer 0 initialization function

                                                              variable declaration

                                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              start of main programme

                                                              void main()

                                                              init_timer() call it timer initialization function

                                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                              start of while loop

                                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                              condition for switch1

                                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                              if(iltk) loop will repeat for desired time of charging

                                                              if(igt=1000)

                                                              buzzer=1 turn on buzzer if (ii==20)

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              REady_LED1=1 turn on ready indication of led1

                                                              else if(ii==40)

                                                              REady_LED1=0ii=0

                                                              elseREady_LED1=0

                                                              START_LED1=1

                                                              else

                                                              START_LED1=0

                                                              k1=1 buzzer=0

                                                              REady_LED1=0 flag1=0

                                                              flag5=0flag6=0

                                                              condition for switch2

                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                              REady_LED2=1 turn on ready 2 led indication

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              disp2=0

                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                              if(jltk)

                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                              elseREady_LED2=0

                                                              START_LED2=1

                                                              else START_LED2=0

                                                              REady_LED2=0 k2=1 buzzer=0

                                                              flag2=0flag7=0flag8=0

                                                              j=0jj=0

                                                              condition for switch 3

                                                              if(flag3==1) check swich3 pressed

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              if(disp3==1 )

                                                              REady_LED3=1 disp3=0

                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                              if(lltk)

                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                              elseREady_LED3=0

                                                              START_LED3=1

                                                              else START_LED3=0

                                                              LED2=0 k3=1 buzzer=0

                                                              REady_LED3=0 flag3=0

                                                              flag9=0flag10=0

                                                              l=0ll=0

                                                              condition for switch 4

                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              REady_LED4=1 disp4=0

                                                              if(flag11==1) check coin is pressed

                                                              if(flag12==1) START is pressed

                                                              if(mltk)

                                                              if(mgt1000)

                                                              buzzer=1 if(mm==20)

                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                              elseREady_LED4=0

                                                              START_LED4=1

                                                              else START_LED4=0

                                                              buzzer=0 k4=1

                                                              REady_LED4=0 flag4=0

                                                              flag11=0flag12=0

                                                              m=0mm=0

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              while(1)

                                                              end of main programme

                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                              whenever specific time the interrupt will generate control will go in following function

                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if(sw1_op==0 ) ready switch flag for system1

                                                              my_delay(10) CALL DELAY FUNCTION

                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                              if(flag7==1) SET THE FLAG

                                                              flag7=1

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                              flag9=1

                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                              flag11=1

                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if(sw2_op==0 ) fready switch flag for system2

                                                              my_delay (10)

                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                              if(flag5==1)

                                                              flag5=1

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                              flag9=1

                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                              flag11=1

                                                              elseflag11=0flag4=0REady_LED4=0

                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                              if(flag7==1)

                                                              flag7=1

                                                              else

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                              flag5=1

                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                              flag11=1

                                                              elseflag11=0flag4=0REady_LED4=0

                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                              if(flag7==1)

                                                              flag7=1

                                                              elseflag7=0

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                              flag5=1

                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                              flag9=1

                                                              elseflag9=0flag3=0REady_LED3=0

                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                              if(flag6==1)

                                                              i++ if (igt1000) ii++

                                                              if (flag8==1)

                                                              j++ if(jgt1000) jj++

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              if (flag10==1)

                                                              l++ if (lgt1000) ll++

                                                              if (flag12==1)

                                                              m++ if (mgt1000) mm++

                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 13

                                                              TROUBLE SHOOT

                                                              Troubleshoot

                                                              131 TROUBLE SHOOT

                                                              A newly assembled circuit does not work may be due to -

                                                              Faulty components

                                                              Improper soldering

                                                              Wrong connections

                                                              Also any stop in working after some period may be due to -

                                                              Component failure

                                                              Supply failure

                                                              Damaging of PCB

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Fault finding is very essential if you want the circuit to operate properly

                                                              If a newly assembled circuit is not working properly check all the components and

                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                              proper soldering

                                                              If faults are not observed during physical observations one should proceed for Hot

                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                              Resistance measurement is also done which is known as Dry test

                                                              During this project work some green LEDs was not glow then we checked it

                                                              continuity and replace it

                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                              heated after starting the project It happens because of some soldering points are shorted

                                                              during soldering PCB We solved that problem

                                                              CHAPTER 14

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              ADVANTAGES OF

                                                              THE PROJECT

                                                              Advantages

                                                              141 ADVANTAGES OF THE PROJECT

                                                              Simple and hand efficient Microcontroller based system

                                                              Fast charging capacity

                                                              Simple to operate

                                                              Ease of mobility

                                                              Facilitates connectivity for 90 of cellular phones

                                                              Less expensive

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Reduced man power

                                                              Low power consumption

                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                              CHAPTER 15

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              DISADVANTAGES

                                                              OF THE PROJECT

                                                              Disadvantages

                                                              151 DISADVANTAGES OF THE PROJECT

                                                              It requires mains supply to work project

                                                              Due to limited charging channels till now there may be a possibility that

                                                              mobile phones of few brands cannot be connected for charging For this

                                                              purpose we have to use separate connectors for that specific brand differently

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                              min

                                                              It does not have battery backup therefore it cannot be portable

                                                              CHAPTER 16

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              APPLICATIONS OF

                                                              THE PROJECT

                                                              Application

                                                              161 APPLICATIONS OF THE PROJECT

                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                              charge for the mobile phone in any places

                                                              It is used for emergency charging purposes

                                                              It can be installed in malls railway stations bus stops and other public

                                                              places

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              The charger offers a unique revenue opportunity for a vast range of

                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                              any location where there is a high footfall creating a large number of

                                                              potential users

                                                              It can be installed in offices and collages for pay charging facility

                                                              CHAPTER 17

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              FUTURE

                                                              DEVELOPMENT OF

                                                              THE PROJECT

                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                              This project is very useful to people who are using mobile phone without charging

                                                              condition in public places

                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                              It will provide battery backup for make it portable

                                                              It will also provide SMS system in future

                                                              We can also increase the charging time by editing software of the project

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                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 18

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              COST ANALYSIS

                                                              OF THE PROJECT

                                                              COST ANALYSIS OF THE PROJECT

                                                              181 COST ANALYSIS OF THE PROJECT

                                                              1811 Component list for power supply card

                                                              Footprint Quantity Designators Rate

                                                              Resistor

                                                              22K 1 R2 1

                                                              1K 1 R1 1

                                                              Capacitor

                                                              1000uf25V 1 C5 10

                                                              2200uf25V 1 C1 10

                                                              022uf 2 C6 C2 1

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                              Table 1811 Component list for power supply card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              01uf 2 C4 C3 1

                                                              IC

                                                              BRIDGE W10 2 BR2 BR1 10

                                                              L7812CV (TO-220) 1 U2 8

                                                              L7805CV (TO-220) 1 U1 8

                                                              Connector

                                                              CON PHO 2PIN 2 J3 J2 16

                                                              CON PHO 3PIN 1 J1 12

                                                              LED3mm red 2 L1 L2 15

                                                              Heat sink (TO-220) 2 16

                                                              Total 955

                                                              1812 Component list for battery charger card

                                                              Footprint Quantity Rate

                                                              Capacitor

                                                              2200uf25V 1 1000

                                                              022uf 4 100

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              01uf 4 100

                                                              IC

                                                              BRIDGE W10 1 500

                                                              L7805CV (TO-220) 4 3200

                                                              Connector

                                                              CON PHO 2PIN 1 800

                                                              Relimate 2 pin 1 400

                                                              relimate 3 pin 4 2000

                                                              Heat sink (TO-220) 4 1200

                                                              TOTAL 9300

                                                              1813 Component list for Relay card

                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                              Table 1812Component list for battery charger card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                              Total 18900

                                                              1814Component list for controller card

                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                              Table 1813Component list for relay card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                              total 27000

                                                              1815 Miscellaneous material

                                                              Material Quantity Rate

                                                              electronic item

                                                              Transformer

                                                              TXR1 0-9-15 1 20000

                                                              0-9 1A

                                                              0-15 100mA

                                                              TXR2 0-9 1 16500

                                                              0-9 1A

                                                              Proximity switch 1 20000

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                              Table 1814Component list for microcontroller card

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Red push bottom 4 4000

                                                              Green push button 1 1000

                                                              Red led 5mm 4 800

                                                              Green led 5mm 4 800

                                                              Led holder 8 1600

                                                              Copper clad 2 4000

                                                              3 core cable 1 meter 1500

                                                              3 pin plug 1 3000

                                                              2 pin relimate wire 19 9000

                                                              3 pin relimate wire 5 3750

                                                              4 pin relimate wire 2 2000

                                                              mechanical items

                                                              Enclosure 1 25000

                                                              Acrylic sheet 2 X 1 30000

                                                              12mm cable gland 1 1000

                                                              Screw 3mm 33 2000

                                                              Screw 35mm 6 2400

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              10 mm spacers 100 1500

                                                              10mm insert to stud 50 10000

                                                              cable tie 2500

                                                              Total 162350

                                                              CHAPTER 19

                                                              APPENDIX

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                              Table 1815Component list for miscellaneous material

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              APPENDIX

                                                              191 APPENDIX

                                                              1911 78xx IC datasheet

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                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1912 W10 datasheet

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1913 4n33 IC datasheet

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                              1914 MAX 232

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1915 ULN2003a IC datasheet

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              1916 89V51RD2 IC datasheet

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 20

                                                              CONCLUSION

                                                              CONCLUSION

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              201 CONCLUSION

                                                              The coin-operated mobile phone charger is already successfully installed in

                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                              installed in any business premises

                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                              a high footfall creating a large number of potential users

                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                              extend low mobile phone talk time provide battery charging

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 21

                                                              IMAGES OF THE

                                                              PROJECT

                                                              Images of the project

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              211 IMAGES OF THE PROJECT

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                              fig211 lsquoCoin operated mobile battery charger

                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Fig 216 Relay driver circuit

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                              Fig 213 Constant voltage battery charger circuit

                                                              Fig214 Power supply circuit

                                                              Fig215 Metal detector proximity switch

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Fig217 Microcontroller circuit

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              Fig228 coin operated mobile battery charger project presentation

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              CHAPTER 22

                                                              BIBILOGRAPHY

                                                              BIBLIOGRAPHY

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                              221 BIBLIOGRAPHY

                                                              BOOKS

                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                              INTERNET LINKS

                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                              • CHAPTER 1

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                all digital circuits have some type of oscillator This stream of output pulses is often

                                                                called a clock One of the most important features of any oscillator is its frequency stability

                                                                or in other words its ability to provide a constant frequency output under varying load

                                                                conditions Some of the factors that affect the frequency stability of an oscillator include

                                                                temperature variations in the load and changes in the DC power supply Frequency stability

                                                                of the output signal can be improved by the proper selection of the components used for the

                                                                resonant feedback circuit including the amplifier but there is a limit to the stability that can

                                                                be obtained from normal LC and RC tank circuits

                                                                In our project instead of 12MHz crystal 110592MHz is used because it can be

                                                                divided to give you exact clock rates for most of the common baud rates for the UART

                                                                especially for the higher speeds (9600 19200) These crystals are readily available and

                                                                commonly used

                                                                78 SWITCH

                                                                781 WORKING

                                                                The most familiar form of switch is a manually operated

                                                                electromechanical device with one or more sets of electrical contacts

                                                                Each set of contacts can be in one of two states either closed meaning

                                                                the contacts are touching and electricity can flow between them or

                                                                open meaning the contacts are separated and the switch is non

                                                                conducting The mechanism actuating the transition between these two

                                                                states (open or closed) can be either a toggle (flip switch for continuous on or off) or

                                                                momentary (push-for on or push-for off) type

                                                                782 USES

                                                                In electronics a switch is an electrical component that can break an electrical

                                                                circuit interrupting the current or diverting it from one conductor to another

                                                                783 TESTING

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 32

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                                no connection Switch can tested by using multimeter in continuity range

                                                                79 DARLINGTON PAIR IC (ULN2003a)

                                                                791 WORKING

                                                                The Darlington transistor (often called a Darlington pair) is a

                                                                compound structure consisting of two bipolar transistors (either

                                                                integrated or separated devices) connected in such a way that the

                                                                current amplified by the first transistor is amplified further by the

                                                                second one This configuration gives a much higher current gain than

                                                                each transistor taken separately and in the case of integrated devices

                                                                can take less space than two individual transistors because they can

                                                                use a shared collector

                                                                Integrated Darlington pairs come packaged singly in

                                                                transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                                The Darlington transistor array used is ULN2003 Applications include relay

                                                                drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                                drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                                to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                                for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                                792 FEATURES

                                                                The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                                transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                                with common-cathode clamp diodes for switching inductive loads The collector-current

                                                                rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                                higher current capability

                                                                710 SERIES VOLTAGE REGULATER IC (78XX)

                                                                7101 WORKING

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Voltage Regulator (regulator) usually having three legs converts varying input

                                                                voltage and produces a constant regulated output voltage They are available in a variety of

                                                                outputs

                                                                The most common part numbers start with the numbers 78 or 79 and finish with two

                                                                digits indicating the output voltage The number 78 represents positive voltage and 79

                                                                negative one The 78XX series of voltage regulators are designed for positive input

                                                                The LM78XX series typically has the ability to drive current up to 1A For

                                                                application requirements up to 150mA 78LXX can be used As mentioned above the

                                                                component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                                an output leg with the regulators voltage

                                                                As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                                voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                                difference between the input and output appears as heat If the input voltage is unnecessarily

                                                                high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                                sinking the regulator will shut down

                                                                711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                                7111 WORKING

                                                                The MAX-232 It includes a Charge Pump which generates

                                                                +10V and -10V from a single 5v supply

                                                                This IC also includes two receivers and two transmitters in

                                                                the same package This is handy in many cases when we only want to

                                                                use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                                receive line and one for the transmit There are also many variations of these devices The

                                                                large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                                available which use smaller capacitors and even some with inbuilt capacitors However the

                                                                MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                                Dual Charge-Pump Voltage Converter

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                                V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                                output

                                                                712 OPTOCOUPLER IC (4N33)

                                                                7121 WORKING

                                                                In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                                photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                                between elements of a circuit typically a transmitter and a receiver while keeping them

                                                                electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                                back to an electrical signal electrical contact along the path is broken

                                                                Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                                essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                                arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                                light-triggered diac The two are separated by a transparent barrier which blocks any

                                                                electrical current flow between the two but does allow the passage of light

                                                                The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                                silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                                of isolation between driving and load circuits These Optocouplers can be used to replace

                                                                reed and mercury relays with advantages of long life high speed switching and elimination

                                                                of magnetic field

                                                                713 MICROCONTROLLER IC (89V51 RD 2 )

                                                                713 WORKING

                                                                The P89V51RD2 is an 80C51 microcontroller with 64

                                                                kB Flash and 1024 bytes of data RAM

                                                                A key feature of the P89V51RD2 is its X2 mode option

                                                                The design engineer can choose to run the application with the conventional 80C51 clock

                                                                rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                                feature is to keep the same performance by reducing the clock frequency by half thus

                                                                dramatically reducing the EMI

                                                                The Flash program memory supports both parallel programming and in serial In-

                                                                System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                                speed reducing programming costs and time to market ISP allows a device to be

                                                                reprogrammed in the end product under software control The capability to fieldupdate the

                                                                application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                                In-Application Programmable (IAP) allowing the Flash program memory to be

                                                                reconfigured even while the application is running

                                                                714 RELIMATE CONNECTOR

                                                                7141 WORKING

                                                                These are wire to board type connectors used to facilitate

                                                                proper and firm electrical connection between the relay card and

                                                                microcontroller card

                                                                The connector has following specifications

                                                                No of Ways 2-20

                                                                Voltage Rating 250V AC DC

                                                                Current Rating 3A AC DC

                                                                Contact Resistance 20mW max

                                                                Insulation Resistance 1000MW min

                                                                Dielectric Withstanding 1000V ACminute

                                                                Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                                The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                                connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                                conflicts

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                715 RS-232 PORT CONNECTOR

                                                                7151 WORKING

                                                                Almost all digital devices which we use require either TTL

                                                                or CMOS logic levels Therefore the first step to connecting a

                                                                device to the RS-232 port is to transform the RS-232 levels back

                                                                into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                problem in many instances where only a single supply of +5V is present

                                                                CHAPTER 8

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                IMPLIMENTATION

                                                                OF THE PCB

                                                                Components layout designing

                                                                Developing or Etching the PCB

                                                                Other operations like Drilling Cutting Tinning

                                                                81 IMPLIMENTATION OF THE PCB

                                                                A proper PCB ensure that various circuit components are interconnected as per the

                                                                circuit diagram once they have been placed on the PCB in their proper positions and

                                                                subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                base material to which is permanently attached a flat metallic network of conducting path

                                                                whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                for this project is single one

                                                                The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                board configuration however is most widely used and it may be of the nature of the single

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                which ensures adequate and permanent low resistance coupling

                                                                811 BOARD DESIGN

                                                                PCB designed is the most important and requires great care during work In this case

                                                                great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                also help to solve this problem when circuit is complicated

                                                                812 THE MASTER DIAGRAM

                                                                The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                which is commonly made twice as the finished circuit since this makes the working on that

                                                                much easier especially when circuit is complicated photography eventually reduces the

                                                                size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                the designing -

                                                                a The space between the conductors must be strictly controlled to avoid the possibility

                                                                of electrical discharges or unwanted capacitance The amount by which the mater

                                                                diagram is to reduce in size is thus a critical deign feature

                                                                b The conductor must be wider in those part of the circuits that are going to handle

                                                                large current must be handle without undue temperature of conductors

                                                                c The minimum width of copper should not generally be less than about 15mmThis

                                                                is related to mechanical strength rather than electrical properties and it also ensure

                                                                that strips remains securely bounded to the base material

                                                                d The points where the component holes for component lead wire occurs must be sited

                                                                to suit the dimensions of the component and dimensions between lead-out wire so

                                                                that the components can be situated correctly on finished board The conductor is

                                                                also main large at the point of holes

                                                                813 PCB MAKING

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                When the mater diagram probable twice the size of real PCB has been evolved the

                                                                test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                board to create a circuit as depicted by master diagram It must be stressed that very

                                                                accurate checking master is essential at this stage Then the master point is mounted on a

                                                                special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                brought into operation This comprises the camera body mounted so that sideways after

                                                                each exposure In this way number of copies of the original master diagram is set out

                                                                exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                In case of simple and need of number of less PCB economic and advisable to use the

                                                                following lab method of PCB making

                                                                Planning The Circuit

                                                                It is not a particular difficult There are several important factors that need not be

                                                                taken into account if the finished device is to work properly we must consider gain factor

                                                                and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                possibility We must also ensure that conductors and components carrying high frequency

                                                                current are well separated from the part of the circuit We are also to make sure that all

                                                                components need to return to earth are properly connected and that possibility of common

                                                                impedance arising earth returned

                                                                Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                with nature of design Other factors that have to successfully studied include availability of

                                                                adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                made for mechanical fixing ventilation effect of vibration

                                                                Cleaning The Board

                                                                The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                transferred to it This is important because even slightest trace of graze (from figure of

                                                                instance) will impure the etching process and when the circuit plan has been neatly

                                                                transferred to copper in this manner the board is held under running tap and the allowed to

                                                                dry before resist is applied

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Transforming the Plan

                                                                Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                board and working plan and carefully trace the lines of original plan with a ball pen

                                                                Resist

                                                                Resist is nothing more than a substrate that is unaffected by presence etching

                                                                chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                covered when resists the leaguer type of paints possess good resist properties but

                                                                disadvantage of relatively long time taken for drying It is essential to resist through

                                                                hardening before etching is started Nail polished are better as they quickly and are less

                                                                difficult to remove

                                                                To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                in different sizes

                                                                Correcting Error

                                                                When a result has been thoroughly hardened any errors that have been made can

                                                                usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                edges of copper conductors on board the resist must be applied with steady band

                                                                Etching

                                                                Next comes etching of unwanted copper amp whether a small single is all that is

                                                                required as quantity of board to be produce certain precautions must be taken before

                                                                operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                grams of water

                                                                Agitation

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                temperature and thickness of copper foil

                                                                Finishing Off

                                                                When all unwanted copper is dissolved from areas between conductor board should

                                                                be taken from an etchant amp washed in water The resist must be removed using proper

                                                                solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                This process is called Tinning This process of coating involve track with soldier

                                                                Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                Assembling On PCB

                                                                After the holes are drilled the component have to be assembled on PCB before

                                                                assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                repetitive use cleans soldering iron

                                                                CHAPTER 9

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                SOLDERING

                                                                TECHNIQUE

                                                                Technique for good soldering

                                                                91 SOLDERING TECHNIQUE

                                                                For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                applied should be such that when solder wire is touched to joint it must melt

                                                                quickly

                                                                The joint and the soldering iron is held such that molten solder should flow

                                                                smoothly over the joint

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                When joint is completely covered with molten solder the soldering iron is re-

                                                                moved

                                                                The joint is allowed to cool without any movement

                                                                The bright shining solder indicates good soldering

                                                                In case of dry solder joint a air gap remains in between the solder material and

                                                                the joint It means that soldering is improper This is removed and again solder-

                                                                ing is done

                                                                Thus this way all the components are soldered on P C B

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 10

                                                                PCB LAYOUTS

                                                                Schematic diagram

                                                                Bottom and top layout

                                                                101 POWER SUPPLY CARD

                                                                1011 SCHIMETIC DIAGRAM

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1012 LEGEND MARKING

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                Fig1011 Schematic diagram of power supply card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1013TOP LAYER

                                                                1014 BOTTOM LAYER

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                Fig1013 Top layer of power supply

                                                                card

                                                                Fig1014 Schematic diagram of power supply card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                102 BATTERY CHARGER CARD

                                                                1021 SCHEMATIC DIAGRAM

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                Fig1021 Schematic diagram of battery charger card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                103 RELAY CARD

                                                                1031 SCHIMETIC DIAGRAM

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                Fig1031 Schematic diagram of Relay card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1032 RELAY CARD LEGEND MARKING

                                                                1033 TOP LAYER

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                Fig1032 Legend marking of Relay card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1034 BOTTOM LAYER

                                                                104 MICROCONTROLER CARD

                                                                1041 SCHIMETIC DIAGRAM

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                Fig1034 Bottom layer of Relay card

                                                                Fig1041 Schematic diagram of microcontroller card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1042 ALL LAYERS

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                Fig1042 All layer of microcontroller card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 11

                                                                INTRODUCTION

                                                                OF SOFTWARE

                                                                Keil (microVision 2)

                                                                Eagle (Easily Applicable Graphical Layout Editor)

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                111 Keil (microVision 2)

                                                                1111 Introduction to C51 Cross Compiler

                                                                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                generates object code that matches the efficiency and speed of assembly programming

                                                                Using a high-level language like C has many advantages over assembly language

                                                                programming

                                                                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                Details like register allocation and addressing of the various memory types and data

                                                                types is managed by the compiler

                                                                Programs get a formal structure (which is imposed by the C programming language) and

                                                                can be divided into separate functions This contributes to source code reusability as

                                                                well as better overall application structure

                                                                The ability to combine variable selection with specific operations improves program

                                                                readability

                                                                Keywords and operational functions that more nearly resemble the human thought

                                                                process may be used

                                                                Programming and program test time is drastically reduced

                                                                The C run-time library contains many standard routines such as formatted output

                                                                numeric conversions and floating-point arithmetic

                                                                Existing program parts can be more easily included into new programs because of

                                                                modular program construction techniques

                                                                The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                wide popular support and is easily obtained for most systems Existing program

                                                                investments can be quickly adapted to other processors as needed

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1112 Software Development Cycle in Keil

                                                                When we use the Keil Software tools the

                                                                project development cycle is roughly the same as

                                                                it is for any other software development project

                                                                1 Create a project select the target chip from the

                                                                device database and configure the tool settings

                                                                2 Create source files in C or assembly

                                                                3 Build your application with the project

                                                                manager

                                                                4 Correct errors in source files

                                                                5 Test the linked application A block diagram of

                                                                the complete 8051 tool set may best illustrate the

                                                                development cycle

                                                                112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                1121 Schematic Editor

                                                                In this one can develop amp design circuits for the required PCB

                                                                1122 Layout Editor

                                                                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                Fig 111 Software development in KEIL

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1123 Library Editor

                                                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                1124 Auto Router

                                                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                the PCB tracks designed

                                                                1125 Cam Processor

                                                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                Bottom Layer Component Layer Masking Layer etc

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                Start

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 12

                                                                INTRODUCTION

                                                                OF

                                                                PROGRAMMING

                                                                Flowchart of programming

                                                                Program code

                                                                121 Flowchart

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                2

                                                                flag9==1

                                                                flag9=1

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                flag11==1

                                                                flag11=1 flag11=0 flag4=0

                                                                REady_LED4=0

                                                                Sw2_op (P01) ==0

                                                                My delay (10)

                                                                3 3

                                                                flag2=1 disp2=1 k2=0

                                                                3

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                4

                                                                flag11==1

                                                                flag11=0 flag4=0 REady_LED4=0

                                                                flag11=1

                                                                My delay (10)

                                                                flag3=1 disp3=1 k3=0

                                                                k1==0||k2==0||k4==0

                                                                Sw3_op (P02) ==0

                                                                5

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                flag5==1

                                                                5

                                                                flag11==1

                                                                flag7=1

                                                                flag7==1

                                                                flag7=0 flag2=0 REady_LED2=0

                                                                6

                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                flag11=0 flag4=0 REady_LED4=0

                                                                flag11=1

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                6

                                                                My delay (10)

                                                                flag4=1 disp4=1 k4=0

                                                                k1==0||k2==0||k3==0 flag5==1

                                                                7

                                                                Sw4_op (P03) ==0

                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                7

                                                                flag7==1

                                                                flag9==1

                                                                flag7=1

                                                                flag7=0 flag2=0 REady_LED2=0

                                                                flag9=0 flag3=0 REady_LED3=0

                                                                flag9=1

                                                                Sw5_op A(P04) ==0

                                                                My delay (10)

                                                                8

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                9

                                                                flag2==1

                                                                flag3==1

                                                                8

                                                                flag1==1

                                                                flag4==1 flag5=1 disp5=1

                                                                flag9=1 disp5=1

                                                                flag7=1 disp5=1

                                                                flag11=1 disp5=1

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                Sw6_op (P05) ==0

                                                                My delay (10)

                                                                flag2==1 ampamp flag7==1

                                                                flag3==1 ampamp flag9==1 9

                                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                flag8=1 disp6=1

                                                                10

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                10

                                                                flag4==1 ampamp flag11==1

                                                                flag10=1 disp6=1

                                                                flag12=1 disp6=1

                                                                flag8==1

                                                                flag10==1

                                                                11

                                                                flag6==1

                                                                i++

                                                                l++

                                                                j++

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                flag12==1

                                                                M++

                                                                11

                                                                Stop

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                122 Program

                                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                define buzzerP2_0 buzzer indication

                                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                sbit sw5_op=P0^4 input switch5 for coin

                                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                output Led for indication

                                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                function prototype declaration

                                                                void my_delay(unsigned int value) DELAY FUCTION

                                                                void init_timer() timer 0 initialization function

                                                                variable declaration

                                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                start of main programme

                                                                void main()

                                                                init_timer() call it timer initialization function

                                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                start of while loop

                                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                condition for switch1

                                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                if(iltk) loop will repeat for desired time of charging

                                                                if(igt=1000)

                                                                buzzer=1 turn on buzzer if (ii==20)

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                REady_LED1=1 turn on ready indication of led1

                                                                else if(ii==40)

                                                                REady_LED1=0ii=0

                                                                elseREady_LED1=0

                                                                START_LED1=1

                                                                else

                                                                START_LED1=0

                                                                k1=1 buzzer=0

                                                                REady_LED1=0 flag1=0

                                                                flag5=0flag6=0

                                                                condition for switch2

                                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                                REady_LED2=1 turn on ready 2 led indication

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                disp2=0

                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                if(jltk)

                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                elseREady_LED2=0

                                                                START_LED2=1

                                                                else START_LED2=0

                                                                REady_LED2=0 k2=1 buzzer=0

                                                                flag2=0flag7=0flag8=0

                                                                j=0jj=0

                                                                condition for switch 3

                                                                if(flag3==1) check swich3 pressed

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                if(disp3==1 )

                                                                REady_LED3=1 disp3=0

                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                if(lltk)

                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                elseREady_LED3=0

                                                                START_LED3=1

                                                                else START_LED3=0

                                                                LED2=0 k3=1 buzzer=0

                                                                REady_LED3=0 flag3=0

                                                                flag9=0flag10=0

                                                                l=0ll=0

                                                                condition for switch 4

                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                REady_LED4=1 disp4=0

                                                                if(flag11==1) check coin is pressed

                                                                if(flag12==1) START is pressed

                                                                if(mltk)

                                                                if(mgt1000)

                                                                buzzer=1 if(mm==20)

                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                elseREady_LED4=0

                                                                START_LED4=1

                                                                else START_LED4=0

                                                                buzzer=0 k4=1

                                                                REady_LED4=0 flag4=0

                                                                flag11=0flag12=0

                                                                m=0mm=0

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                while(1)

                                                                end of main programme

                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                whenever specific time the interrupt will generate control will go in following function

                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                my_delay(10) CALL DELAY FUNCTION

                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                if(flag7==1) SET THE FLAG

                                                                flag7=1

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                flag9=1

                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                flag11=1

                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                my_delay (10)

                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                if(flag5==1)

                                                                flag5=1

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                flag9=1

                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                flag11=1

                                                                elseflag11=0flag4=0REady_LED4=0

                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                if(flag7==1)

                                                                flag7=1

                                                                else

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                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                flag5=1

                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                flag11=1

                                                                elseflag11=0flag4=0REady_LED4=0

                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                if(flag7==1)

                                                                flag7=1

                                                                elseflag7=0

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                flag5=1

                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                flag9=1

                                                                elseflag9=0flag3=0REady_LED3=0

                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                if(flag6==1)

                                                                i++ if (igt1000) ii++

                                                                if (flag8==1)

                                                                j++ if(jgt1000) jj++

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                if (flag10==1)

                                                                l++ if (lgt1000) ll++

                                                                if (flag12==1)

                                                                m++ if (mgt1000) mm++

                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 13

                                                                TROUBLE SHOOT

                                                                Troubleshoot

                                                                131 TROUBLE SHOOT

                                                                A newly assembled circuit does not work may be due to -

                                                                Faulty components

                                                                Improper soldering

                                                                Wrong connections

                                                                Also any stop in working after some period may be due to -

                                                                Component failure

                                                                Supply failure

                                                                Damaging of PCB

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                If a newly assembled circuit is not working properly check all the components and

                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                proper soldering

                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                Resistance measurement is also done which is known as Dry test

                                                                During this project work some green LEDs was not glow then we checked it

                                                                continuity and replace it

                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                during soldering PCB We solved that problem

                                                                CHAPTER 14

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                ADVANTAGES OF

                                                                THE PROJECT

                                                                Advantages

                                                                141 ADVANTAGES OF THE PROJECT

                                                                Simple and hand efficient Microcontroller based system

                                                                Fast charging capacity

                                                                Simple to operate

                                                                Ease of mobility

                                                                Facilitates connectivity for 90 of cellular phones

                                                                Less expensive

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Reduced man power

                                                                Low power consumption

                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                CHAPTER 15

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                DISADVANTAGES

                                                                OF THE PROJECT

                                                                Disadvantages

                                                                151 DISADVANTAGES OF THE PROJECT

                                                                It requires mains supply to work project

                                                                Due to limited charging channels till now there may be a possibility that

                                                                mobile phones of few brands cannot be connected for charging For this

                                                                purpose we have to use separate connectors for that specific brand differently

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                min

                                                                It does not have battery backup therefore it cannot be portable

                                                                CHAPTER 16

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                APPLICATIONS OF

                                                                THE PROJECT

                                                                Application

                                                                161 APPLICATIONS OF THE PROJECT

                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                charge for the mobile phone in any places

                                                                It is used for emergency charging purposes

                                                                It can be installed in malls railway stations bus stops and other public

                                                                places

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                any location where there is a high footfall creating a large number of

                                                                potential users

                                                                It can be installed in offices and collages for pay charging facility

                                                                CHAPTER 17

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                FUTURE

                                                                DEVELOPMENT OF

                                                                THE PROJECT

                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                This project is very useful to people who are using mobile phone without charging

                                                                condition in public places

                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                It will provide battery backup for make it portable

                                                                It will also provide SMS system in future

                                                                We can also increase the charging time by editing software of the project

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 18

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                COST ANALYSIS

                                                                OF THE PROJECT

                                                                COST ANALYSIS OF THE PROJECT

                                                                181 COST ANALYSIS OF THE PROJECT

                                                                1811 Component list for power supply card

                                                                Footprint Quantity Designators Rate

                                                                Resistor

                                                                22K 1 R2 1

                                                                1K 1 R1 1

                                                                Capacitor

                                                                1000uf25V 1 C5 10

                                                                2200uf25V 1 C1 10

                                                                022uf 2 C6 C2 1

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                Table 1811 Component list for power supply card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                01uf 2 C4 C3 1

                                                                IC

                                                                BRIDGE W10 2 BR2 BR1 10

                                                                L7812CV (TO-220) 1 U2 8

                                                                L7805CV (TO-220) 1 U1 8

                                                                Connector

                                                                CON PHO 2PIN 2 J3 J2 16

                                                                CON PHO 3PIN 1 J1 12

                                                                LED3mm red 2 L1 L2 15

                                                                Heat sink (TO-220) 2 16

                                                                Total 955

                                                                1812 Component list for battery charger card

                                                                Footprint Quantity Rate

                                                                Capacitor

                                                                2200uf25V 1 1000

                                                                022uf 4 100

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                01uf 4 100

                                                                IC

                                                                BRIDGE W10 1 500

                                                                L7805CV (TO-220) 4 3200

                                                                Connector

                                                                CON PHO 2PIN 1 800

                                                                Relimate 2 pin 1 400

                                                                relimate 3 pin 4 2000

                                                                Heat sink (TO-220) 4 1200

                                                                TOTAL 9300

                                                                1813 Component list for Relay card

                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                Table 1812Component list for battery charger card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                Total 18900

                                                                1814Component list for controller card

                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                Table 1813Component list for relay card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                total 27000

                                                                1815 Miscellaneous material

                                                                Material Quantity Rate

                                                                electronic item

                                                                Transformer

                                                                TXR1 0-9-15 1 20000

                                                                0-9 1A

                                                                0-15 100mA

                                                                TXR2 0-9 1 16500

                                                                0-9 1A

                                                                Proximity switch 1 20000

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                Table 1814Component list for microcontroller card

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Red push bottom 4 4000

                                                                Green push button 1 1000

                                                                Red led 5mm 4 800

                                                                Green led 5mm 4 800

                                                                Led holder 8 1600

                                                                Copper clad 2 4000

                                                                3 core cable 1 meter 1500

                                                                3 pin plug 1 3000

                                                                2 pin relimate wire 19 9000

                                                                3 pin relimate wire 5 3750

                                                                4 pin relimate wire 2 2000

                                                                mechanical items

                                                                Enclosure 1 25000

                                                                Acrylic sheet 2 X 1 30000

                                                                12mm cable gland 1 1000

                                                                Screw 3mm 33 2000

                                                                Screw 35mm 6 2400

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                10 mm spacers 100 1500

                                                                10mm insert to stud 50 10000

                                                                cable tie 2500

                                                                Total 162350

                                                                CHAPTER 19

                                                                APPENDIX

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                Table 1815Component list for miscellaneous material

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                APPENDIX

                                                                191 APPENDIX

                                                                1911 78xx IC datasheet

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1912 W10 datasheet

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1913 4n33 IC datasheet

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                1914 MAX 232

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1915 ULN2003a IC datasheet

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                1916 89V51RD2 IC datasheet

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 20

                                                                CONCLUSION

                                                                CONCLUSION

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                201 CONCLUSION

                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                installed in any business premises

                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                a high footfall creating a large number of potential users

                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                extend low mobile phone talk time provide battery charging

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 21

                                                                IMAGES OF THE

                                                                PROJECT

                                                                Images of the project

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                211 IMAGES OF THE PROJECT

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                fig211 lsquoCoin operated mobile battery charger

                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Fig 216 Relay driver circuit

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                Fig 213 Constant voltage battery charger circuit

                                                                Fig214 Power supply circuit

                                                                Fig215 Metal detector proximity switch

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Fig217 Microcontroller circuit

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                Fig228 coin operated mobile battery charger project presentation

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                CHAPTER 22

                                                                BIBILOGRAPHY

                                                                BIBLIOGRAPHY

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                221 BIBLIOGRAPHY

                                                                BOOKS

                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                INTERNET LINKS

                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                • CHAPTER 1

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  When the switch is ON it looks and acts like a wire When the switch is OFF there is

                                                                  no connection Switch can tested by using multimeter in continuity range

                                                                  79 DARLINGTON PAIR IC (ULN2003a)

                                                                  791 WORKING

                                                                  The Darlington transistor (often called a Darlington pair) is a

                                                                  compound structure consisting of two bipolar transistors (either

                                                                  integrated or separated devices) connected in such a way that the

                                                                  current amplified by the first transistor is amplified further by the

                                                                  second one This configuration gives a much higher current gain than

                                                                  each transistor taken separately and in the case of integrated devices

                                                                  can take less space than two individual transistors because they can

                                                                  use a shared collector

                                                                  Integrated Darlington pairs come packaged singly in

                                                                  transistor-like packages or as an array of devices (usually eight) in an integrated circuit

                                                                  The Darlington transistor array used is ULN2003 Applications include relay

                                                                  drivers hammer drivers lamp drivers display drivers (LED and gas discharge) line

                                                                  drivers and logic buffers Each input of this device has a zener diode and resistor in series

                                                                  to control the input current to a safe limit The ULN2003A has a 27-k Ω series base resistor

                                                                  for each Darlington pair for operation directly with TTL or 5-V CMOS devices

                                                                  792 FEATURES

                                                                  The ULN2003 is16 pins DIP monolithic high-voltage high-current Darlington

                                                                  transistor array It consists of seven NPN Darlington pairs that feature high-voltage outputs

                                                                  with common-cathode clamp diodes for switching inductive loads The collector-current

                                                                  rating of a single Darlington pair is 500 mA The Darlington pairs may be paralleled for

                                                                  higher current capability

                                                                  710 SERIES VOLTAGE REGULATER IC (78XX)

                                                                  7101 WORKING

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 33

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Voltage Regulator (regulator) usually having three legs converts varying input

                                                                  voltage and produces a constant regulated output voltage They are available in a variety of

                                                                  outputs

                                                                  The most common part numbers start with the numbers 78 or 79 and finish with two

                                                                  digits indicating the output voltage The number 78 represents positive voltage and 79

                                                                  negative one The 78XX series of voltage regulators are designed for positive input

                                                                  The LM78XX series typically has the ability to drive current up to 1A For

                                                                  application requirements up to 150mA 78LXX can be used As mentioned above the

                                                                  component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                                  an output leg with the regulators voltage

                                                                  As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                                  voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                                  difference between the input and output appears as heat If the input voltage is unnecessarily

                                                                  high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                                  sinking the regulator will shut down

                                                                  711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                                  7111 WORKING

                                                                  The MAX-232 It includes a Charge Pump which generates

                                                                  +10V and -10V from a single 5v supply

                                                                  This IC also includes two receivers and two transmitters in

                                                                  the same package This is handy in many cases when we only want to

                                                                  use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                                  receive line and one for the transmit There are also many variations of these devices The

                                                                  large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                                  available which use smaller capacitors and even some with inbuilt capacitors However the

                                                                  MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                                  Dual Charge-Pump Voltage Converter

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                                  V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                                  output

                                                                  712 OPTOCOUPLER IC (4N33)

                                                                  7121 WORKING

                                                                  In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                                  photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                                  between elements of a circuit typically a transmitter and a receiver while keeping them

                                                                  electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                                  back to an electrical signal electrical contact along the path is broken

                                                                  Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                                  essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                                  arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                                  light-triggered diac The two are separated by a transparent barrier which blocks any

                                                                  electrical current flow between the two but does allow the passage of light

                                                                  The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                                  silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                                  of isolation between driving and load circuits These Optocouplers can be used to replace

                                                                  reed and mercury relays with advantages of long life high speed switching and elimination

                                                                  of magnetic field

                                                                  713 MICROCONTROLLER IC (89V51 RD 2 )

                                                                  713 WORKING

                                                                  The P89V51RD2 is an 80C51 microcontroller with 64

                                                                  kB Flash and 1024 bytes of data RAM

                                                                  A key feature of the P89V51RD2 is its X2 mode option

                                                                  The design engineer can choose to run the application with the conventional 80C51 clock

                                                                  rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                                  feature is to keep the same performance by reducing the clock frequency by half thus

                                                                  dramatically reducing the EMI

                                                                  The Flash program memory supports both parallel programming and in serial In-

                                                                  System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                                  speed reducing programming costs and time to market ISP allows a device to be

                                                                  reprogrammed in the end product under software control The capability to fieldupdate the

                                                                  application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                                  In-Application Programmable (IAP) allowing the Flash program memory to be

                                                                  reconfigured even while the application is running

                                                                  714 RELIMATE CONNECTOR

                                                                  7141 WORKING

                                                                  These are wire to board type connectors used to facilitate

                                                                  proper and firm electrical connection between the relay card and

                                                                  microcontroller card

                                                                  The connector has following specifications

                                                                  No of Ways 2-20

                                                                  Voltage Rating 250V AC DC

                                                                  Current Rating 3A AC DC

                                                                  Contact Resistance 20mW max

                                                                  Insulation Resistance 1000MW min

                                                                  Dielectric Withstanding 1000V ACminute

                                                                  Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                                  The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                                  connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                                  conflicts

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  715 RS-232 PORT CONNECTOR

                                                                  7151 WORKING

                                                                  Almost all digital devices which we use require either TTL

                                                                  or CMOS logic levels Therefore the first step to connecting a

                                                                  device to the RS-232 port is to transform the RS-232 levels back

                                                                  into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                  Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                  Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                  The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                  problem in many instances where only a single supply of +5V is present

                                                                  CHAPTER 8

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  IMPLIMENTATION

                                                                  OF THE PCB

                                                                  Components layout designing

                                                                  Developing or Etching the PCB

                                                                  Other operations like Drilling Cutting Tinning

                                                                  81 IMPLIMENTATION OF THE PCB

                                                                  A proper PCB ensure that various circuit components are interconnected as per the

                                                                  circuit diagram once they have been placed on the PCB in their proper positions and

                                                                  subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                  base material to which is permanently attached a flat metallic network of conducting path

                                                                  whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                  for this project is single one

                                                                  The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                  board configuration however is most widely used and it may be of the nature of the single

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                  which ensures adequate and permanent low resistance coupling

                                                                  811 BOARD DESIGN

                                                                  PCB designed is the most important and requires great care during work In this case

                                                                  great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                  is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                  take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                  unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                  also help to solve this problem when circuit is complicated

                                                                  812 THE MASTER DIAGRAM

                                                                  The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                  which is commonly made twice as the finished circuit since this makes the working on that

                                                                  much easier especially when circuit is complicated photography eventually reduces the

                                                                  size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                  the designing -

                                                                  a The space between the conductors must be strictly controlled to avoid the possibility

                                                                  of electrical discharges or unwanted capacitance The amount by which the mater

                                                                  diagram is to reduce in size is thus a critical deign feature

                                                                  b The conductor must be wider in those part of the circuits that are going to handle

                                                                  large current must be handle without undue temperature of conductors

                                                                  c The minimum width of copper should not generally be less than about 15mmThis

                                                                  is related to mechanical strength rather than electrical properties and it also ensure

                                                                  that strips remains securely bounded to the base material

                                                                  d The points where the component holes for component lead wire occurs must be sited

                                                                  to suit the dimensions of the component and dimensions between lead-out wire so

                                                                  that the components can be situated correctly on finished board The conductor is

                                                                  also main large at the point of holes

                                                                  813 PCB MAKING

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  When the mater diagram probable twice the size of real PCB has been evolved the

                                                                  test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                  board to create a circuit as depicted by master diagram It must be stressed that very

                                                                  accurate checking master is essential at this stage Then the master point is mounted on a

                                                                  special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                  illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                  developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                  brought into operation This comprises the camera body mounted so that sideways after

                                                                  each exposure In this way number of copies of the original master diagram is set out

                                                                  exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                  In case of simple and need of number of less PCB economic and advisable to use the

                                                                  following lab method of PCB making

                                                                  Planning The Circuit

                                                                  It is not a particular difficult There are several important factors that need not be

                                                                  taken into account if the finished device is to work properly we must consider gain factor

                                                                  and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                  possibility We must also ensure that conductors and components carrying high frequency

                                                                  current are well separated from the part of the circuit We are also to make sure that all

                                                                  components need to return to earth are properly connected and that possibility of common

                                                                  impedance arising earth returned

                                                                  Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                  with nature of design Other factors that have to successfully studied include availability of

                                                                  adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                  made for mechanical fixing ventilation effect of vibration

                                                                  Cleaning The Board

                                                                  The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                  transferred to it This is important because even slightest trace of graze (from figure of

                                                                  instance) will impure the etching process and when the circuit plan has been neatly

                                                                  transferred to copper in this manner the board is held under running tap and the allowed to

                                                                  dry before resist is applied

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Transforming the Plan

                                                                  Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                  A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                  board and working plan and carefully trace the lines of original plan with a ball pen

                                                                  Resist

                                                                  Resist is nothing more than a substrate that is unaffected by presence etching

                                                                  chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                  clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                  covered when resists the leaguer type of paints possess good resist properties but

                                                                  disadvantage of relatively long time taken for drying It is essential to resist through

                                                                  hardening before etching is started Nail polished are better as they quickly and are less

                                                                  difficult to remove

                                                                  To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                  PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                  short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                  in different sizes

                                                                  Correcting Error

                                                                  When a result has been thoroughly hardened any errors that have been made can

                                                                  usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                  edges of copper conductors on board the resist must be applied with steady band

                                                                  Etching

                                                                  Next comes etching of unwanted copper amp whether a small single is all that is

                                                                  required as quantity of board to be produce certain precautions must be taken before

                                                                  operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                  quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                  etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                  grams of water

                                                                  Agitation

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                  the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                  laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                  gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                  temperature and thickness of copper foil

                                                                  Finishing Off

                                                                  When all unwanted copper is dissolved from areas between conductor board should

                                                                  be taken from an etchant amp washed in water The resist must be removed using proper

                                                                  solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                  seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                  PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                  This process is called Tinning This process of coating involve track with soldier

                                                                  Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                  ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                  Assembling On PCB

                                                                  After the holes are drilled the component have to be assembled on PCB before

                                                                  assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                  accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                  repetitive use cleans soldering iron

                                                                  CHAPTER 9

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  SOLDERING

                                                                  TECHNIQUE

                                                                  Technique for good soldering

                                                                  91 SOLDERING TECHNIQUE

                                                                  For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                  oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                  Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                  applied should be such that when solder wire is touched to joint it must melt

                                                                  quickly

                                                                  The joint and the soldering iron is held such that molten solder should flow

                                                                  smoothly over the joint

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  When joint is completely covered with molten solder the soldering iron is re-

                                                                  moved

                                                                  The joint is allowed to cool without any movement

                                                                  The bright shining solder indicates good soldering

                                                                  In case of dry solder joint a air gap remains in between the solder material and

                                                                  the joint It means that soldering is improper This is removed and again solder-

                                                                  ing is done

                                                                  Thus this way all the components are soldered on P C B

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 10

                                                                  PCB LAYOUTS

                                                                  Schematic diagram

                                                                  Bottom and top layout

                                                                  101 POWER SUPPLY CARD

                                                                  1011 SCHIMETIC DIAGRAM

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1012 LEGEND MARKING

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                  Fig1011 Schematic diagram of power supply card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1013TOP LAYER

                                                                  1014 BOTTOM LAYER

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                  Fig1013 Top layer of power supply

                                                                  card

                                                                  Fig1014 Schematic diagram of power supply card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  102 BATTERY CHARGER CARD

                                                                  1021 SCHEMATIC DIAGRAM

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                  Fig1021 Schematic diagram of battery charger card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  103 RELAY CARD

                                                                  1031 SCHIMETIC DIAGRAM

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                  Fig1031 Schematic diagram of Relay card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1032 RELAY CARD LEGEND MARKING

                                                                  1033 TOP LAYER

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                  Fig1032 Legend marking of Relay card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1034 BOTTOM LAYER

                                                                  104 MICROCONTROLER CARD

                                                                  1041 SCHIMETIC DIAGRAM

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                  Fig1034 Bottom layer of Relay card

                                                                  Fig1041 Schematic diagram of microcontroller card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1042 ALL LAYERS

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                  Fig1042 All layer of microcontroller card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 11

                                                                  INTRODUCTION

                                                                  OF SOFTWARE

                                                                  Keil (microVision 2)

                                                                  Eagle (Easily Applicable Graphical Layout Editor)

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  111 Keil (microVision 2)

                                                                  1111 Introduction to C51 Cross Compiler

                                                                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                  generates object code that matches the efficiency and speed of assembly programming

                                                                  Using a high-level language like C has many advantages over assembly language

                                                                  programming

                                                                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                  the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                  Details like register allocation and addressing of the various memory types and data

                                                                  types is managed by the compiler

                                                                  Programs get a formal structure (which is imposed by the C programming language) and

                                                                  can be divided into separate functions This contributes to source code reusability as

                                                                  well as better overall application structure

                                                                  The ability to combine variable selection with specific operations improves program

                                                                  readability

                                                                  Keywords and operational functions that more nearly resemble the human thought

                                                                  process may be used

                                                                  Programming and program test time is drastically reduced

                                                                  The C run-time library contains many standard routines such as formatted output

                                                                  numeric conversions and floating-point arithmetic

                                                                  Existing program parts can be more easily included into new programs because of

                                                                  modular program construction techniques

                                                                  The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                  wide popular support and is easily obtained for most systems Existing program

                                                                  investments can be quickly adapted to other processors as needed

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1112 Software Development Cycle in Keil

                                                                  When we use the Keil Software tools the

                                                                  project development cycle is roughly the same as

                                                                  it is for any other software development project

                                                                  1 Create a project select the target chip from the

                                                                  device database and configure the tool settings

                                                                  2 Create source files in C or assembly

                                                                  3 Build your application with the project

                                                                  manager

                                                                  4 Correct errors in source files

                                                                  5 Test the linked application A block diagram of

                                                                  the complete 8051 tool set may best illustrate the

                                                                  development cycle

                                                                  112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                  1121 Schematic Editor

                                                                  In this one can develop amp design circuits for the required PCB

                                                                  1122 Layout Editor

                                                                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                  Fig 111 Software development in KEIL

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1123 Library Editor

                                                                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                  1124 Auto Router

                                                                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                  the PCB tracks designed

                                                                  1125 Cam Processor

                                                                  This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                  Bottom Layer Component Layer Masking Layer etc

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                  Start

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 12

                                                                  INTRODUCTION

                                                                  OF

                                                                  PROGRAMMING

                                                                  Flowchart of programming

                                                                  Program code

                                                                  121 Flowchart

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                  2

                                                                  flag9==1

                                                                  flag9=1

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                  flag11==1

                                                                  flag11=1 flag11=0 flag4=0

                                                                  REady_LED4=0

                                                                  Sw2_op (P01) ==0

                                                                  My delay (10)

                                                                  3 3

                                                                  flag2=1 disp2=1 k2=0

                                                                  3

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                  4

                                                                  flag11==1

                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                  flag11=1

                                                                  My delay (10)

                                                                  flag3=1 disp3=1 k3=0

                                                                  k1==0||k2==0||k4==0

                                                                  Sw3_op (P02) ==0

                                                                  5

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                  flag5==1

                                                                  5

                                                                  flag11==1

                                                                  flag7=1

                                                                  flag7==1

                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                  6

                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                  flag11=1

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                  6

                                                                  My delay (10)

                                                                  flag4=1 disp4=1 k4=0

                                                                  k1==0||k2==0||k3==0 flag5==1

                                                                  7

                                                                  Sw4_op (P03) ==0

                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                  7

                                                                  flag7==1

                                                                  flag9==1

                                                                  flag7=1

                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                  flag9=0 flag3=0 REady_LED3=0

                                                                  flag9=1

                                                                  Sw5_op A(P04) ==0

                                                                  My delay (10)

                                                                  8

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                  9

                                                                  flag2==1

                                                                  flag3==1

                                                                  8

                                                                  flag1==1

                                                                  flag4==1 flag5=1 disp5=1

                                                                  flag9=1 disp5=1

                                                                  flag7=1 disp5=1

                                                                  flag11=1 disp5=1

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                  Sw6_op (P05) ==0

                                                                  My delay (10)

                                                                  flag2==1 ampamp flag7==1

                                                                  flag3==1 ampamp flag9==1 9

                                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                  flag8=1 disp6=1

                                                                  10

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                  10

                                                                  flag4==1 ampamp flag11==1

                                                                  flag10=1 disp6=1

                                                                  flag12=1 disp6=1

                                                                  flag8==1

                                                                  flag10==1

                                                                  11

                                                                  flag6==1

                                                                  i++

                                                                  l++

                                                                  j++

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                  flag12==1

                                                                  M++

                                                                  11

                                                                  Stop

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  122 Program

                                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                  define buzzerP2_0 buzzer indication

                                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                  output Led for indication

                                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                  function prototype declaration

                                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                                  void init_timer() timer 0 initialization function

                                                                  variable declaration

                                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  start of main programme

                                                                  void main()

                                                                  init_timer() call it timer initialization function

                                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                  start of while loop

                                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                  condition for switch1

                                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                  if(iltk) loop will repeat for desired time of charging

                                                                  if(igt=1000)

                                                                  buzzer=1 turn on buzzer if (ii==20)

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  REady_LED1=1 turn on ready indication of led1

                                                                  else if(ii==40)

                                                                  REady_LED1=0ii=0

                                                                  elseREady_LED1=0

                                                                  START_LED1=1

                                                                  else

                                                                  START_LED1=0

                                                                  k1=1 buzzer=0

                                                                  REady_LED1=0 flag1=0

                                                                  flag5=0flag6=0

                                                                  condition for switch2

                                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                                  REady_LED2=1 turn on ready 2 led indication

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  disp2=0

                                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                  if(jltk)

                                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                  elseREady_LED2=0

                                                                  START_LED2=1

                                                                  else START_LED2=0

                                                                  REady_LED2=0 k2=1 buzzer=0

                                                                  flag2=0flag7=0flag8=0

                                                                  j=0jj=0

                                                                  condition for switch 3

                                                                  if(flag3==1) check swich3 pressed

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  if(disp3==1 )

                                                                  REady_LED3=1 disp3=0

                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                  if(lltk)

                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                  elseREady_LED3=0

                                                                  START_LED3=1

                                                                  else START_LED3=0

                                                                  LED2=0 k3=1 buzzer=0

                                                                  REady_LED3=0 flag3=0

                                                                  flag9=0flag10=0

                                                                  l=0ll=0

                                                                  condition for switch 4

                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  REady_LED4=1 disp4=0

                                                                  if(flag11==1) check coin is pressed

                                                                  if(flag12==1) START is pressed

                                                                  if(mltk)

                                                                  if(mgt1000)

                                                                  buzzer=1 if(mm==20)

                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                  elseREady_LED4=0

                                                                  START_LED4=1

                                                                  else START_LED4=0

                                                                  buzzer=0 k4=1

                                                                  REady_LED4=0 flag4=0

                                                                  flag11=0flag12=0

                                                                  m=0mm=0

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  while(1)

                                                                  end of main programme

                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                  if(flag7==1) SET THE FLAG

                                                                  flag7=1

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                  flag9=1

                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                  flag11=1

                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                  my_delay (10)

                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                  if(flag5==1)

                                                                  flag5=1

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                  flag9=1

                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                  flag11=1

                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                  if(flag7==1)

                                                                  flag7=1

                                                                  else

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                  flag5=1

                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                  flag11=1

                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                  if(flag7==1)

                                                                  flag7=1

                                                                  elseflag7=0

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                  flag5=1

                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                  flag9=1

                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                  if(flag6==1)

                                                                  i++ if (igt1000) ii++

                                                                  if (flag8==1)

                                                                  j++ if(jgt1000) jj++

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  if (flag10==1)

                                                                  l++ if (lgt1000) ll++

                                                                  if (flag12==1)

                                                                  m++ if (mgt1000) mm++

                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 13

                                                                  TROUBLE SHOOT

                                                                  Troubleshoot

                                                                  131 TROUBLE SHOOT

                                                                  A newly assembled circuit does not work may be due to -

                                                                  Faulty components

                                                                  Improper soldering

                                                                  Wrong connections

                                                                  Also any stop in working after some period may be due to -

                                                                  Component failure

                                                                  Supply failure

                                                                  Damaging of PCB

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                  proper soldering

                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                  Resistance measurement is also done which is known as Dry test

                                                                  During this project work some green LEDs was not glow then we checked it

                                                                  continuity and replace it

                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                  during soldering PCB We solved that problem

                                                                  CHAPTER 14

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  ADVANTAGES OF

                                                                  THE PROJECT

                                                                  Advantages

                                                                  141 ADVANTAGES OF THE PROJECT

                                                                  Simple and hand efficient Microcontroller based system

                                                                  Fast charging capacity

                                                                  Simple to operate

                                                                  Ease of mobility

                                                                  Facilitates connectivity for 90 of cellular phones

                                                                  Less expensive

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Reduced man power

                                                                  Low power consumption

                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                  CHAPTER 15

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  DISADVANTAGES

                                                                  OF THE PROJECT

                                                                  Disadvantages

                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                  It requires mains supply to work project

                                                                  Due to limited charging channels till now there may be a possibility that

                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                  min

                                                                  It does not have battery backup therefore it cannot be portable

                                                                  CHAPTER 16

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  APPLICATIONS OF

                                                                  THE PROJECT

                                                                  Application

                                                                  161 APPLICATIONS OF THE PROJECT

                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                  charge for the mobile phone in any places

                                                                  It is used for emergency charging purposes

                                                                  It can be installed in malls railway stations bus stops and other public

                                                                  places

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                  any location where there is a high footfall creating a large number of

                                                                  potential users

                                                                  It can be installed in offices and collages for pay charging facility

                                                                  CHAPTER 17

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  FUTURE

                                                                  DEVELOPMENT OF

                                                                  THE PROJECT

                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                  This project is very useful to people who are using mobile phone without charging

                                                                  condition in public places

                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                  It will provide battery backup for make it portable

                                                                  It will also provide SMS system in future

                                                                  We can also increase the charging time by editing software of the project

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 18

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  COST ANALYSIS

                                                                  OF THE PROJECT

                                                                  COST ANALYSIS OF THE PROJECT

                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                  1811 Component list for power supply card

                                                                  Footprint Quantity Designators Rate

                                                                  Resistor

                                                                  22K 1 R2 1

                                                                  1K 1 R1 1

                                                                  Capacitor

                                                                  1000uf25V 1 C5 10

                                                                  2200uf25V 1 C1 10

                                                                  022uf 2 C6 C2 1

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                  Table 1811 Component list for power supply card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  01uf 2 C4 C3 1

                                                                  IC

                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                  L7812CV (TO-220) 1 U2 8

                                                                  L7805CV (TO-220) 1 U1 8

                                                                  Connector

                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                  CON PHO 3PIN 1 J1 12

                                                                  LED3mm red 2 L1 L2 15

                                                                  Heat sink (TO-220) 2 16

                                                                  Total 955

                                                                  1812 Component list for battery charger card

                                                                  Footprint Quantity Rate

                                                                  Capacitor

                                                                  2200uf25V 1 1000

                                                                  022uf 4 100

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  01uf 4 100

                                                                  IC

                                                                  BRIDGE W10 1 500

                                                                  L7805CV (TO-220) 4 3200

                                                                  Connector

                                                                  CON PHO 2PIN 1 800

                                                                  Relimate 2 pin 1 400

                                                                  relimate 3 pin 4 2000

                                                                  Heat sink (TO-220) 4 1200

                                                                  TOTAL 9300

                                                                  1813 Component list for Relay card

                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                  Table 1812Component list for battery charger card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                  Total 18900

                                                                  1814Component list for controller card

                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                  Table 1813Component list for relay card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                  total 27000

                                                                  1815 Miscellaneous material

                                                                  Material Quantity Rate

                                                                  electronic item

                                                                  Transformer

                                                                  TXR1 0-9-15 1 20000

                                                                  0-9 1A

                                                                  0-15 100mA

                                                                  TXR2 0-9 1 16500

                                                                  0-9 1A

                                                                  Proximity switch 1 20000

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                  Table 1814Component list for microcontroller card

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Red push bottom 4 4000

                                                                  Green push button 1 1000

                                                                  Red led 5mm 4 800

                                                                  Green led 5mm 4 800

                                                                  Led holder 8 1600

                                                                  Copper clad 2 4000

                                                                  3 core cable 1 meter 1500

                                                                  3 pin plug 1 3000

                                                                  2 pin relimate wire 19 9000

                                                                  3 pin relimate wire 5 3750

                                                                  4 pin relimate wire 2 2000

                                                                  mechanical items

                                                                  Enclosure 1 25000

                                                                  Acrylic sheet 2 X 1 30000

                                                                  12mm cable gland 1 1000

                                                                  Screw 3mm 33 2000

                                                                  Screw 35mm 6 2400

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  10 mm spacers 100 1500

                                                                  10mm insert to stud 50 10000

                                                                  cable tie 2500

                                                                  Total 162350

                                                                  CHAPTER 19

                                                                  APPENDIX

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                  Table 1815Component list for miscellaneous material

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  APPENDIX

                                                                  191 APPENDIX

                                                                  1911 78xx IC datasheet

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1912 W10 datasheet

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1913 4n33 IC datasheet

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                  1914 MAX 232

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1915 ULN2003a IC datasheet

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  1916 89V51RD2 IC datasheet

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 20

                                                                  CONCLUSION

                                                                  CONCLUSION

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  201 CONCLUSION

                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                  installed in any business premises

                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                  a high footfall creating a large number of potential users

                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                  extend low mobile phone talk time provide battery charging

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 21

                                                                  IMAGES OF THE

                                                                  PROJECT

                                                                  Images of the project

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  211 IMAGES OF THE PROJECT

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Fig 216 Relay driver circuit

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                  Fig 213 Constant voltage battery charger circuit

                                                                  Fig214 Power supply circuit

                                                                  Fig215 Metal detector proximity switch

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Fig217 Microcontroller circuit

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  CHAPTER 22

                                                                  BIBILOGRAPHY

                                                                  BIBLIOGRAPHY

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                  221 BIBLIOGRAPHY

                                                                  BOOKS

                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                  INTERNET LINKS

                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                  • CHAPTER 1

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Voltage Regulator (regulator) usually having three legs converts varying input

                                                                    voltage and produces a constant regulated output voltage They are available in a variety of

                                                                    outputs

                                                                    The most common part numbers start with the numbers 78 or 79 and finish with two

                                                                    digits indicating the output voltage The number 78 represents positive voltage and 79

                                                                    negative one The 78XX series of voltage regulators are designed for positive input

                                                                    The LM78XX series typically has the ability to drive current up to 1A For

                                                                    application requirements up to 150mA 78LXX can be used As mentioned above the

                                                                    component has three legs Input leg which can hold up to 36VDC Common leg (GND) and

                                                                    an output leg with the regulators voltage

                                                                    As a general rule the input voltage should be limited to 2 to 3 volts above the output

                                                                    voltage The LM78XX series can handle up to 36 volts input be advised that the power

                                                                    difference between the input and output appears as heat If the input voltage is unnecessarily

                                                                    high the regulator will overheat Unless sufficient heat dissipation is provided through heat

                                                                    sinking the regulator will shut down

                                                                    711 SERIAL COMMUNICATION DRIVER IC (MAX 232)

                                                                    7111 WORKING

                                                                    The MAX-232 It includes a Charge Pump which generates

                                                                    +10V and -10V from a single 5v supply

                                                                    This IC also includes two receivers and two transmitters in

                                                                    the same package This is handy in many cases when we only want to

                                                                    use the Transmit and Receive data Lines We dont need to use two chips one for the

                                                                    receive line and one for the transmit There are also many variations of these devices The

                                                                    large value of capacitors are not only bulky but also expensive Therefore other devices are

                                                                    available which use smaller capacitors and even some with inbuilt capacitors However the

                                                                    MAX-232 is the most common and thus we will use this RS-232 Level Converter

                                                                    Dual Charge-Pump Voltage Converter

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 34

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                                    V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                                    output

                                                                    712 OPTOCOUPLER IC (4N33)

                                                                    7121 WORKING

                                                                    In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                                    photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                                    between elements of a circuit typically a transmitter and a receiver while keeping them

                                                                    electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                                    back to an electrical signal electrical contact along the path is broken

                                                                    Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                                    essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                                    arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                                    light-triggered diac The two are separated by a transparent barrier which blocks any

                                                                    electrical current flow between the two but does allow the passage of light

                                                                    The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                                    silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                                    of isolation between driving and load circuits These Optocouplers can be used to replace

                                                                    reed and mercury relays with advantages of long life high speed switching and elimination

                                                                    of magnetic field

                                                                    713 MICROCONTROLLER IC (89V51 RD 2 )

                                                                    713 WORKING

                                                                    The P89V51RD2 is an 80C51 microcontroller with 64

                                                                    kB Flash and 1024 bytes of data RAM

                                                                    A key feature of the P89V51RD2 is its X2 mode option

                                                                    The design engineer can choose to run the application with the conventional 80C51 clock

                                                                    rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                                    feature is to keep the same performance by reducing the clock frequency by half thus

                                                                    dramatically reducing the EMI

                                                                    The Flash program memory supports both parallel programming and in serial In-

                                                                    System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                                    speed reducing programming costs and time to market ISP allows a device to be

                                                                    reprogrammed in the end product under software control The capability to fieldupdate the

                                                                    application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                                    In-Application Programmable (IAP) allowing the Flash program memory to be

                                                                    reconfigured even while the application is running

                                                                    714 RELIMATE CONNECTOR

                                                                    7141 WORKING

                                                                    These are wire to board type connectors used to facilitate

                                                                    proper and firm electrical connection between the relay card and

                                                                    microcontroller card

                                                                    The connector has following specifications

                                                                    No of Ways 2-20

                                                                    Voltage Rating 250V AC DC

                                                                    Current Rating 3A AC DC

                                                                    Contact Resistance 20mW max

                                                                    Insulation Resistance 1000MW min

                                                                    Dielectric Withstanding 1000V ACminute

                                                                    Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                                    The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                                    connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                                    conflicts

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    715 RS-232 PORT CONNECTOR

                                                                    7151 WORKING

                                                                    Almost all digital devices which we use require either TTL

                                                                    or CMOS logic levels Therefore the first step to connecting a

                                                                    device to the RS-232 port is to transform the RS-232 levels back

                                                                    into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                    Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                    Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                    The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                    problem in many instances where only a single supply of +5V is present

                                                                    CHAPTER 8

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    IMPLIMENTATION

                                                                    OF THE PCB

                                                                    Components layout designing

                                                                    Developing or Etching the PCB

                                                                    Other operations like Drilling Cutting Tinning

                                                                    81 IMPLIMENTATION OF THE PCB

                                                                    A proper PCB ensure that various circuit components are interconnected as per the

                                                                    circuit diagram once they have been placed on the PCB in their proper positions and

                                                                    subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                    base material to which is permanently attached a flat metallic network of conducting path

                                                                    whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                    for this project is single one

                                                                    The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                    board configuration however is most widely used and it may be of the nature of the single

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                    which ensures adequate and permanent low resistance coupling

                                                                    811 BOARD DESIGN

                                                                    PCB designed is the most important and requires great care during work In this case

                                                                    great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                    is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                    take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                    unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                    also help to solve this problem when circuit is complicated

                                                                    812 THE MASTER DIAGRAM

                                                                    The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                    which is commonly made twice as the finished circuit since this makes the working on that

                                                                    much easier especially when circuit is complicated photography eventually reduces the

                                                                    size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                    the designing -

                                                                    a The space between the conductors must be strictly controlled to avoid the possibility

                                                                    of electrical discharges or unwanted capacitance The amount by which the mater

                                                                    diagram is to reduce in size is thus a critical deign feature

                                                                    b The conductor must be wider in those part of the circuits that are going to handle

                                                                    large current must be handle without undue temperature of conductors

                                                                    c The minimum width of copper should not generally be less than about 15mmThis

                                                                    is related to mechanical strength rather than electrical properties and it also ensure

                                                                    that strips remains securely bounded to the base material

                                                                    d The points where the component holes for component lead wire occurs must be sited

                                                                    to suit the dimensions of the component and dimensions between lead-out wire so

                                                                    that the components can be situated correctly on finished board The conductor is

                                                                    also main large at the point of holes

                                                                    813 PCB MAKING

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    When the mater diagram probable twice the size of real PCB has been evolved the

                                                                    test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                    board to create a circuit as depicted by master diagram It must be stressed that very

                                                                    accurate checking master is essential at this stage Then the master point is mounted on a

                                                                    special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                    illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                    developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                    brought into operation This comprises the camera body mounted so that sideways after

                                                                    each exposure In this way number of copies of the original master diagram is set out

                                                                    exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                    In case of simple and need of number of less PCB economic and advisable to use the

                                                                    following lab method of PCB making

                                                                    Planning The Circuit

                                                                    It is not a particular difficult There are several important factors that need not be

                                                                    taken into account if the finished device is to work properly we must consider gain factor

                                                                    and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                    possibility We must also ensure that conductors and components carrying high frequency

                                                                    current are well separated from the part of the circuit We are also to make sure that all

                                                                    components need to return to earth are properly connected and that possibility of common

                                                                    impedance arising earth returned

                                                                    Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                    with nature of design Other factors that have to successfully studied include availability of

                                                                    adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                    made for mechanical fixing ventilation effect of vibration

                                                                    Cleaning The Board

                                                                    The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                    transferred to it This is important because even slightest trace of graze (from figure of

                                                                    instance) will impure the etching process and when the circuit plan has been neatly

                                                                    transferred to copper in this manner the board is held under running tap and the allowed to

                                                                    dry before resist is applied

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Transforming the Plan

                                                                    Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                    A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                    board and working plan and carefully trace the lines of original plan with a ball pen

                                                                    Resist

                                                                    Resist is nothing more than a substrate that is unaffected by presence etching

                                                                    chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                    clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                    covered when resists the leaguer type of paints possess good resist properties but

                                                                    disadvantage of relatively long time taken for drying It is essential to resist through

                                                                    hardening before etching is started Nail polished are better as they quickly and are less

                                                                    difficult to remove

                                                                    To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                    PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                    short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                    in different sizes

                                                                    Correcting Error

                                                                    When a result has been thoroughly hardened any errors that have been made can

                                                                    usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                    edges of copper conductors on board the resist must be applied with steady band

                                                                    Etching

                                                                    Next comes etching of unwanted copper amp whether a small single is all that is

                                                                    required as quantity of board to be produce certain precautions must be taken before

                                                                    operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                    quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                    etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                    grams of water

                                                                    Agitation

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                    the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                    temperature and thickness of copper foil

                                                                    Finishing Off

                                                                    When all unwanted copper is dissolved from areas between conductor board should

                                                                    be taken from an etchant amp washed in water The resist must be removed using proper

                                                                    solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                    seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                    This process is called Tinning This process of coating involve track with soldier

                                                                    Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                    Assembling On PCB

                                                                    After the holes are drilled the component have to be assembled on PCB before

                                                                    assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                    accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                    repetitive use cleans soldering iron

                                                                    CHAPTER 9

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    SOLDERING

                                                                    TECHNIQUE

                                                                    Technique for good soldering

                                                                    91 SOLDERING TECHNIQUE

                                                                    For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                    oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                    Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                    applied should be such that when solder wire is touched to joint it must melt

                                                                    quickly

                                                                    The joint and the soldering iron is held such that molten solder should flow

                                                                    smoothly over the joint

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    When joint is completely covered with molten solder the soldering iron is re-

                                                                    moved

                                                                    The joint is allowed to cool without any movement

                                                                    The bright shining solder indicates good soldering

                                                                    In case of dry solder joint a air gap remains in between the solder material and

                                                                    the joint It means that soldering is improper This is removed and again solder-

                                                                    ing is done

                                                                    Thus this way all the components are soldered on P C B

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 10

                                                                    PCB LAYOUTS

                                                                    Schematic diagram

                                                                    Bottom and top layout

                                                                    101 POWER SUPPLY CARD

                                                                    1011 SCHIMETIC DIAGRAM

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1012 LEGEND MARKING

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                    Fig1011 Schematic diagram of power supply card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1013TOP LAYER

                                                                    1014 BOTTOM LAYER

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                    Fig1013 Top layer of power supply

                                                                    card

                                                                    Fig1014 Schematic diagram of power supply card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    102 BATTERY CHARGER CARD

                                                                    1021 SCHEMATIC DIAGRAM

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                    Fig1021 Schematic diagram of battery charger card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    103 RELAY CARD

                                                                    1031 SCHIMETIC DIAGRAM

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                    Fig1031 Schematic diagram of Relay card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1032 RELAY CARD LEGEND MARKING

                                                                    1033 TOP LAYER

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                    Fig1032 Legend marking of Relay card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1034 BOTTOM LAYER

                                                                    104 MICROCONTROLER CARD

                                                                    1041 SCHIMETIC DIAGRAM

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                    Fig1034 Bottom layer of Relay card

                                                                    Fig1041 Schematic diagram of microcontroller card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1042 ALL LAYERS

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                    Fig1042 All layer of microcontroller card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 11

                                                                    INTRODUCTION

                                                                    OF SOFTWARE

                                                                    Keil (microVision 2)

                                                                    Eagle (Easily Applicable Graphical Layout Editor)

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    111 Keil (microVision 2)

                                                                    1111 Introduction to C51 Cross Compiler

                                                                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                    generates object code that matches the efficiency and speed of assembly programming

                                                                    Using a high-level language like C has many advantages over assembly language

                                                                    programming

                                                                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                    the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                    Details like register allocation and addressing of the various memory types and data

                                                                    types is managed by the compiler

                                                                    Programs get a formal structure (which is imposed by the C programming language) and

                                                                    can be divided into separate functions This contributes to source code reusability as

                                                                    well as better overall application structure

                                                                    The ability to combine variable selection with specific operations improves program

                                                                    readability

                                                                    Keywords and operational functions that more nearly resemble the human thought

                                                                    process may be used

                                                                    Programming and program test time is drastically reduced

                                                                    The C run-time library contains many standard routines such as formatted output

                                                                    numeric conversions and floating-point arithmetic

                                                                    Existing program parts can be more easily included into new programs because of

                                                                    modular program construction techniques

                                                                    The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                    wide popular support and is easily obtained for most systems Existing program

                                                                    investments can be quickly adapted to other processors as needed

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1112 Software Development Cycle in Keil

                                                                    When we use the Keil Software tools the

                                                                    project development cycle is roughly the same as

                                                                    it is for any other software development project

                                                                    1 Create a project select the target chip from the

                                                                    device database and configure the tool settings

                                                                    2 Create source files in C or assembly

                                                                    3 Build your application with the project

                                                                    manager

                                                                    4 Correct errors in source files

                                                                    5 Test the linked application A block diagram of

                                                                    the complete 8051 tool set may best illustrate the

                                                                    development cycle

                                                                    112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                    1121 Schematic Editor

                                                                    In this one can develop amp design circuits for the required PCB

                                                                    1122 Layout Editor

                                                                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                    Fig 111 Software development in KEIL

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1123 Library Editor

                                                                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                    1124 Auto Router

                                                                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                    the PCB tracks designed

                                                                    1125 Cam Processor

                                                                    This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                    Bottom Layer Component Layer Masking Layer etc

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                    Start

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 12

                                                                    INTRODUCTION

                                                                    OF

                                                                    PROGRAMMING

                                                                    Flowchart of programming

                                                                    Program code

                                                                    121 Flowchart

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                    2

                                                                    flag9==1

                                                                    flag9=1

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                    flag11==1

                                                                    flag11=1 flag11=0 flag4=0

                                                                    REady_LED4=0

                                                                    Sw2_op (P01) ==0

                                                                    My delay (10)

                                                                    3 3

                                                                    flag2=1 disp2=1 k2=0

                                                                    3

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                    4

                                                                    flag11==1

                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                    flag11=1

                                                                    My delay (10)

                                                                    flag3=1 disp3=1 k3=0

                                                                    k1==0||k2==0||k4==0

                                                                    Sw3_op (P02) ==0

                                                                    5

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                    flag5==1

                                                                    5

                                                                    flag11==1

                                                                    flag7=1

                                                                    flag7==1

                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                    6

                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                    flag11=1

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                    6

                                                                    My delay (10)

                                                                    flag4=1 disp4=1 k4=0

                                                                    k1==0||k2==0||k3==0 flag5==1

                                                                    7

                                                                    Sw4_op (P03) ==0

                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                    7

                                                                    flag7==1

                                                                    flag9==1

                                                                    flag7=1

                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                    flag9=0 flag3=0 REady_LED3=0

                                                                    flag9=1

                                                                    Sw5_op A(P04) ==0

                                                                    My delay (10)

                                                                    8

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                    9

                                                                    flag2==1

                                                                    flag3==1

                                                                    8

                                                                    flag1==1

                                                                    flag4==1 flag5=1 disp5=1

                                                                    flag9=1 disp5=1

                                                                    flag7=1 disp5=1

                                                                    flag11=1 disp5=1

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                    Sw6_op (P05) ==0

                                                                    My delay (10)

                                                                    flag2==1 ampamp flag7==1

                                                                    flag3==1 ampamp flag9==1 9

                                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                    flag8=1 disp6=1

                                                                    10

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                    10

                                                                    flag4==1 ampamp flag11==1

                                                                    flag10=1 disp6=1

                                                                    flag12=1 disp6=1

                                                                    flag8==1

                                                                    flag10==1

                                                                    11

                                                                    flag6==1

                                                                    i++

                                                                    l++

                                                                    j++

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                    flag12==1

                                                                    M++

                                                                    11

                                                                    Stop

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    122 Program

                                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                    define buzzerP2_0 buzzer indication

                                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                    output Led for indication

                                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                    function prototype declaration

                                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                                    void init_timer() timer 0 initialization function

                                                                    variable declaration

                                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    start of main programme

                                                                    void main()

                                                                    init_timer() call it timer initialization function

                                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                    start of while loop

                                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                    condition for switch1

                                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                    if(iltk) loop will repeat for desired time of charging

                                                                    if(igt=1000)

                                                                    buzzer=1 turn on buzzer if (ii==20)

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    REady_LED1=1 turn on ready indication of led1

                                                                    else if(ii==40)

                                                                    REady_LED1=0ii=0

                                                                    elseREady_LED1=0

                                                                    START_LED1=1

                                                                    else

                                                                    START_LED1=0

                                                                    k1=1 buzzer=0

                                                                    REady_LED1=0 flag1=0

                                                                    flag5=0flag6=0

                                                                    condition for switch2

                                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                                    REady_LED2=1 turn on ready 2 led indication

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    disp2=0

                                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                    if(jltk)

                                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                    elseREady_LED2=0

                                                                    START_LED2=1

                                                                    else START_LED2=0

                                                                    REady_LED2=0 k2=1 buzzer=0

                                                                    flag2=0flag7=0flag8=0

                                                                    j=0jj=0

                                                                    condition for switch 3

                                                                    if(flag3==1) check swich3 pressed

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    if(disp3==1 )

                                                                    REady_LED3=1 disp3=0

                                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                    if(lltk)

                                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                    elseREady_LED3=0

                                                                    START_LED3=1

                                                                    else START_LED3=0

                                                                    LED2=0 k3=1 buzzer=0

                                                                    REady_LED3=0 flag3=0

                                                                    flag9=0flag10=0

                                                                    l=0ll=0

                                                                    condition for switch 4

                                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    REady_LED4=1 disp4=0

                                                                    if(flag11==1) check coin is pressed

                                                                    if(flag12==1) START is pressed

                                                                    if(mltk)

                                                                    if(mgt1000)

                                                                    buzzer=1 if(mm==20)

                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                    elseREady_LED4=0

                                                                    START_LED4=1

                                                                    else START_LED4=0

                                                                    buzzer=0 k4=1

                                                                    REady_LED4=0 flag4=0

                                                                    flag11=0flag12=0

                                                                    m=0mm=0

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    while(1)

                                                                    end of main programme

                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                    if(flag7==1) SET THE FLAG

                                                                    flag7=1

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                    flag9=1

                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                    flag11=1

                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                    my_delay (10)

                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                    if(flag5==1)

                                                                    flag5=1

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                    flag9=1

                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                    flag11=1

                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                    if(flag7==1)

                                                                    flag7=1

                                                                    else

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                    flag5=1

                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                    flag11=1

                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                    if(flag7==1)

                                                                    flag7=1

                                                                    elseflag7=0

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                    flag5=1

                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                    flag9=1

                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                    if(flag6==1)

                                                                    i++ if (igt1000) ii++

                                                                    if (flag8==1)

                                                                    j++ if(jgt1000) jj++

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    if (flag10==1)

                                                                    l++ if (lgt1000) ll++

                                                                    if (flag12==1)

                                                                    m++ if (mgt1000) mm++

                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 13

                                                                    TROUBLE SHOOT

                                                                    Troubleshoot

                                                                    131 TROUBLE SHOOT

                                                                    A newly assembled circuit does not work may be due to -

                                                                    Faulty components

                                                                    Improper soldering

                                                                    Wrong connections

                                                                    Also any stop in working after some period may be due to -

                                                                    Component failure

                                                                    Supply failure

                                                                    Damaging of PCB

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                    proper soldering

                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                    Resistance measurement is also done which is known as Dry test

                                                                    During this project work some green LEDs was not glow then we checked it

                                                                    continuity and replace it

                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                    during soldering PCB We solved that problem

                                                                    CHAPTER 14

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    ADVANTAGES OF

                                                                    THE PROJECT

                                                                    Advantages

                                                                    141 ADVANTAGES OF THE PROJECT

                                                                    Simple and hand efficient Microcontroller based system

                                                                    Fast charging capacity

                                                                    Simple to operate

                                                                    Ease of mobility

                                                                    Facilitates connectivity for 90 of cellular phones

                                                                    Less expensive

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Reduced man power

                                                                    Low power consumption

                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                    CHAPTER 15

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    DISADVANTAGES

                                                                    OF THE PROJECT

                                                                    Disadvantages

                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                    It requires mains supply to work project

                                                                    Due to limited charging channels till now there may be a possibility that

                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                    min

                                                                    It does not have battery backup therefore it cannot be portable

                                                                    CHAPTER 16

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    APPLICATIONS OF

                                                                    THE PROJECT

                                                                    Application

                                                                    161 APPLICATIONS OF THE PROJECT

                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                    charge for the mobile phone in any places

                                                                    It is used for emergency charging purposes

                                                                    It can be installed in malls railway stations bus stops and other public

                                                                    places

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                    any location where there is a high footfall creating a large number of

                                                                    potential users

                                                                    It can be installed in offices and collages for pay charging facility

                                                                    CHAPTER 17

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    FUTURE

                                                                    DEVELOPMENT OF

                                                                    THE PROJECT

                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                    This project is very useful to people who are using mobile phone without charging

                                                                    condition in public places

                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                    It will provide battery backup for make it portable

                                                                    It will also provide SMS system in future

                                                                    We can also increase the charging time by editing software of the project

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 18

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    COST ANALYSIS

                                                                    OF THE PROJECT

                                                                    COST ANALYSIS OF THE PROJECT

                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                    1811 Component list for power supply card

                                                                    Footprint Quantity Designators Rate

                                                                    Resistor

                                                                    22K 1 R2 1

                                                                    1K 1 R1 1

                                                                    Capacitor

                                                                    1000uf25V 1 C5 10

                                                                    2200uf25V 1 C1 10

                                                                    022uf 2 C6 C2 1

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                    Table 1811 Component list for power supply card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    01uf 2 C4 C3 1

                                                                    IC

                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                    L7812CV (TO-220) 1 U2 8

                                                                    L7805CV (TO-220) 1 U1 8

                                                                    Connector

                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                    CON PHO 3PIN 1 J1 12

                                                                    LED3mm red 2 L1 L2 15

                                                                    Heat sink (TO-220) 2 16

                                                                    Total 955

                                                                    1812 Component list for battery charger card

                                                                    Footprint Quantity Rate

                                                                    Capacitor

                                                                    2200uf25V 1 1000

                                                                    022uf 4 100

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    01uf 4 100

                                                                    IC

                                                                    BRIDGE W10 1 500

                                                                    L7805CV (TO-220) 4 3200

                                                                    Connector

                                                                    CON PHO 2PIN 1 800

                                                                    Relimate 2 pin 1 400

                                                                    relimate 3 pin 4 2000

                                                                    Heat sink (TO-220) 4 1200

                                                                    TOTAL 9300

                                                                    1813 Component list for Relay card

                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                    Table 1812Component list for battery charger card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                    Total 18900

                                                                    1814Component list for controller card

                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                    Table 1813Component list for relay card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                    total 27000

                                                                    1815 Miscellaneous material

                                                                    Material Quantity Rate

                                                                    electronic item

                                                                    Transformer

                                                                    TXR1 0-9-15 1 20000

                                                                    0-9 1A

                                                                    0-15 100mA

                                                                    TXR2 0-9 1 16500

                                                                    0-9 1A

                                                                    Proximity switch 1 20000

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                    Table 1814Component list for microcontroller card

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Red push bottom 4 4000

                                                                    Green push button 1 1000

                                                                    Red led 5mm 4 800

                                                                    Green led 5mm 4 800

                                                                    Led holder 8 1600

                                                                    Copper clad 2 4000

                                                                    3 core cable 1 meter 1500

                                                                    3 pin plug 1 3000

                                                                    2 pin relimate wire 19 9000

                                                                    3 pin relimate wire 5 3750

                                                                    4 pin relimate wire 2 2000

                                                                    mechanical items

                                                                    Enclosure 1 25000

                                                                    Acrylic sheet 2 X 1 30000

                                                                    12mm cable gland 1 1000

                                                                    Screw 3mm 33 2000

                                                                    Screw 35mm 6 2400

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    10 mm spacers 100 1500

                                                                    10mm insert to stud 50 10000

                                                                    cable tie 2500

                                                                    Total 162350

                                                                    CHAPTER 19

                                                                    APPENDIX

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                    Table 1815Component list for miscellaneous material

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    APPENDIX

                                                                    191 APPENDIX

                                                                    1911 78xx IC datasheet

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1912 W10 datasheet

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1913 4n33 IC datasheet

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                    1914 MAX 232

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1915 ULN2003a IC datasheet

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    1916 89V51RD2 IC datasheet

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 20

                                                                    CONCLUSION

                                                                    CONCLUSION

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    201 CONCLUSION

                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                    installed in any business premises

                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                    a high footfall creating a large number of potential users

                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                    extend low mobile phone talk time provide battery charging

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 21

                                                                    IMAGES OF THE

                                                                    PROJECT

                                                                    Images of the project

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    211 IMAGES OF THE PROJECT

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Fig 216 Relay driver circuit

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                    Fig 213 Constant voltage battery charger circuit

                                                                    Fig214 Power supply circuit

                                                                    Fig215 Metal detector proximity switch

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Fig217 Microcontroller circuit

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    CHAPTER 22

                                                                    BIBILOGRAPHY

                                                                    BIBLIOGRAPHY

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                    221 BIBLIOGRAPHY

                                                                    BOOKS

                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                    INTERNET LINKS

                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                    • CHAPTER 1

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the

                                                                      V+ output The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V-

                                                                      output

                                                                      712 OPTOCOUPLER IC (4N33)

                                                                      7121 WORKING

                                                                      In electronics an opto-isolator (or optical isolator optocoupler photocoupler or

                                                                      photoMOS) is a device that uses a short optical transmission path to transfer a signal

                                                                      between elements of a circuit typically a transmitter and a receiver while keeping them

                                                                      electrically isolated mdash since the signal goes from an electrical signal to an optical signal

                                                                      back to an electrical signal electrical contact along the path is broken

                                                                      Optocouplers typically come in a small 6-pin or 8-pin IC package but are

                                                                      essentially a combination of two distinct devices an optical transmitter typically a gallium

                                                                      arsenide LED (light-emitting diode) and an optical receiver such as a phototransistor or

                                                                      light-triggered diac The two are separated by a transparent barrier which blocks any

                                                                      electrical current flow between the two but does allow the passage of light

                                                                      The 4N33 are optically coupled isolators with a gallium arsenide infrared LED and a

                                                                      silicon photo Darlington sensor Switching can be achieved while maintaining a high degree

                                                                      of isolation between driving and load circuits These Optocouplers can be used to replace

                                                                      reed and mercury relays with advantages of long life high speed switching and elimination

                                                                      of magnetic field

                                                                      713 MICROCONTROLLER IC (89V51 RD 2 )

                                                                      713 WORKING

                                                                      The P89V51RD2 is an 80C51 microcontroller with 64

                                                                      kB Flash and 1024 bytes of data RAM

                                                                      A key feature of the P89V51RD2 is its X2 mode option

                                                                      The design engineer can choose to run the application with the conventional 80C51 clock

                                                                      rate (12 clocks per machine cycle) or select the X2 mode (6 clocks per machine cycle) to

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 35

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                                      feature is to keep the same performance by reducing the clock frequency by half thus

                                                                      dramatically reducing the EMI

                                                                      The Flash program memory supports both parallel programming and in serial In-

                                                                      System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                                      speed reducing programming costs and time to market ISP allows a device to be

                                                                      reprogrammed in the end product under software control The capability to fieldupdate the

                                                                      application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                                      In-Application Programmable (IAP) allowing the Flash program memory to be

                                                                      reconfigured even while the application is running

                                                                      714 RELIMATE CONNECTOR

                                                                      7141 WORKING

                                                                      These are wire to board type connectors used to facilitate

                                                                      proper and firm electrical connection between the relay card and

                                                                      microcontroller card

                                                                      The connector has following specifications

                                                                      No of Ways 2-20

                                                                      Voltage Rating 250V AC DC

                                                                      Current Rating 3A AC DC

                                                                      Contact Resistance 20mW max

                                                                      Insulation Resistance 1000MW min

                                                                      Dielectric Withstanding 1000V ACminute

                                                                      Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                                      The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                                      connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                                      conflicts

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      715 RS-232 PORT CONNECTOR

                                                                      7151 WORKING

                                                                      Almost all digital devices which we use require either TTL

                                                                      or CMOS logic levels Therefore the first step to connecting a

                                                                      device to the RS-232 port is to transform the RS-232 levels back

                                                                      into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                      Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                      Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                      The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                      problem in many instances where only a single supply of +5V is present

                                                                      CHAPTER 8

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      IMPLIMENTATION

                                                                      OF THE PCB

                                                                      Components layout designing

                                                                      Developing or Etching the PCB

                                                                      Other operations like Drilling Cutting Tinning

                                                                      81 IMPLIMENTATION OF THE PCB

                                                                      A proper PCB ensure that various circuit components are interconnected as per the

                                                                      circuit diagram once they have been placed on the PCB in their proper positions and

                                                                      subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                      base material to which is permanently attached a flat metallic network of conducting path

                                                                      whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                      for this project is single one

                                                                      The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                      board configuration however is most widely used and it may be of the nature of the single

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                      which ensures adequate and permanent low resistance coupling

                                                                      811 BOARD DESIGN

                                                                      PCB designed is the most important and requires great care during work In this case

                                                                      great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                      is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                      take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                      unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                      also help to solve this problem when circuit is complicated

                                                                      812 THE MASTER DIAGRAM

                                                                      The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                      which is commonly made twice as the finished circuit since this makes the working on that

                                                                      much easier especially when circuit is complicated photography eventually reduces the

                                                                      size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                      the designing -

                                                                      a The space between the conductors must be strictly controlled to avoid the possibility

                                                                      of electrical discharges or unwanted capacitance The amount by which the mater

                                                                      diagram is to reduce in size is thus a critical deign feature

                                                                      b The conductor must be wider in those part of the circuits that are going to handle

                                                                      large current must be handle without undue temperature of conductors

                                                                      c The minimum width of copper should not generally be less than about 15mmThis

                                                                      is related to mechanical strength rather than electrical properties and it also ensure

                                                                      that strips remains securely bounded to the base material

                                                                      d The points where the component holes for component lead wire occurs must be sited

                                                                      to suit the dimensions of the component and dimensions between lead-out wire so

                                                                      that the components can be situated correctly on finished board The conductor is

                                                                      also main large at the point of holes

                                                                      813 PCB MAKING

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      When the mater diagram probable twice the size of real PCB has been evolved the

                                                                      test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                      board to create a circuit as depicted by master diagram It must be stressed that very

                                                                      accurate checking master is essential at this stage Then the master point is mounted on a

                                                                      special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                      illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                      developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                      brought into operation This comprises the camera body mounted so that sideways after

                                                                      each exposure In this way number of copies of the original master diagram is set out

                                                                      exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                      In case of simple and need of number of less PCB economic and advisable to use the

                                                                      following lab method of PCB making

                                                                      Planning The Circuit

                                                                      It is not a particular difficult There are several important factors that need not be

                                                                      taken into account if the finished device is to work properly we must consider gain factor

                                                                      and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                      possibility We must also ensure that conductors and components carrying high frequency

                                                                      current are well separated from the part of the circuit We are also to make sure that all

                                                                      components need to return to earth are properly connected and that possibility of common

                                                                      impedance arising earth returned

                                                                      Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                      with nature of design Other factors that have to successfully studied include availability of

                                                                      adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                      made for mechanical fixing ventilation effect of vibration

                                                                      Cleaning The Board

                                                                      The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                      transferred to it This is important because even slightest trace of graze (from figure of

                                                                      instance) will impure the etching process and when the circuit plan has been neatly

                                                                      transferred to copper in this manner the board is held under running tap and the allowed to

                                                                      dry before resist is applied

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Transforming the Plan

                                                                      Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                      A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                      board and working plan and carefully trace the lines of original plan with a ball pen

                                                                      Resist

                                                                      Resist is nothing more than a substrate that is unaffected by presence etching

                                                                      chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                      clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                      covered when resists the leaguer type of paints possess good resist properties but

                                                                      disadvantage of relatively long time taken for drying It is essential to resist through

                                                                      hardening before etching is started Nail polished are better as they quickly and are less

                                                                      difficult to remove

                                                                      To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                      PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                      short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                      in different sizes

                                                                      Correcting Error

                                                                      When a result has been thoroughly hardened any errors that have been made can

                                                                      usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                      edges of copper conductors on board the resist must be applied with steady band

                                                                      Etching

                                                                      Next comes etching of unwanted copper amp whether a small single is all that is

                                                                      required as quantity of board to be produce certain precautions must be taken before

                                                                      operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                      quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                      etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                      grams of water

                                                                      Agitation

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                      the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                      laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                      gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                      temperature and thickness of copper foil

                                                                      Finishing Off

                                                                      When all unwanted copper is dissolved from areas between conductor board should

                                                                      be taken from an etchant amp washed in water The resist must be removed using proper

                                                                      solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                      seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                      PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                      This process is called Tinning This process of coating involve track with soldier

                                                                      Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                      ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                      Assembling On PCB

                                                                      After the holes are drilled the component have to be assembled on PCB before

                                                                      assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                      accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                      repetitive use cleans soldering iron

                                                                      CHAPTER 9

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      SOLDERING

                                                                      TECHNIQUE

                                                                      Technique for good soldering

                                                                      91 SOLDERING TECHNIQUE

                                                                      For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                      oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                      Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                      applied should be such that when solder wire is touched to joint it must melt

                                                                      quickly

                                                                      The joint and the soldering iron is held such that molten solder should flow

                                                                      smoothly over the joint

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      When joint is completely covered with molten solder the soldering iron is re-

                                                                      moved

                                                                      The joint is allowed to cool without any movement

                                                                      The bright shining solder indicates good soldering

                                                                      In case of dry solder joint a air gap remains in between the solder material and

                                                                      the joint It means that soldering is improper This is removed and again solder-

                                                                      ing is done

                                                                      Thus this way all the components are soldered on P C B

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 10

                                                                      PCB LAYOUTS

                                                                      Schematic diagram

                                                                      Bottom and top layout

                                                                      101 POWER SUPPLY CARD

                                                                      1011 SCHIMETIC DIAGRAM

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1012 LEGEND MARKING

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                      Fig1011 Schematic diagram of power supply card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1013TOP LAYER

                                                                      1014 BOTTOM LAYER

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                      Fig1013 Top layer of power supply

                                                                      card

                                                                      Fig1014 Schematic diagram of power supply card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      102 BATTERY CHARGER CARD

                                                                      1021 SCHEMATIC DIAGRAM

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                      Fig1021 Schematic diagram of battery charger card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      103 RELAY CARD

                                                                      1031 SCHIMETIC DIAGRAM

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                      Fig1031 Schematic diagram of Relay card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1032 RELAY CARD LEGEND MARKING

                                                                      1033 TOP LAYER

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                      Fig1032 Legend marking of Relay card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1034 BOTTOM LAYER

                                                                      104 MICROCONTROLER CARD

                                                                      1041 SCHIMETIC DIAGRAM

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                      Fig1034 Bottom layer of Relay card

                                                                      Fig1041 Schematic diagram of microcontroller card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1042 ALL LAYERS

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                      Fig1042 All layer of microcontroller card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 11

                                                                      INTRODUCTION

                                                                      OF SOFTWARE

                                                                      Keil (microVision 2)

                                                                      Eagle (Easily Applicable Graphical Layout Editor)

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      111 Keil (microVision 2)

                                                                      1111 Introduction to C51 Cross Compiler

                                                                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                      generates object code that matches the efficiency and speed of assembly programming

                                                                      Using a high-level language like C has many advantages over assembly language

                                                                      programming

                                                                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                      the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                      Details like register allocation and addressing of the various memory types and data

                                                                      types is managed by the compiler

                                                                      Programs get a formal structure (which is imposed by the C programming language) and

                                                                      can be divided into separate functions This contributes to source code reusability as

                                                                      well as better overall application structure

                                                                      The ability to combine variable selection with specific operations improves program

                                                                      readability

                                                                      Keywords and operational functions that more nearly resemble the human thought

                                                                      process may be used

                                                                      Programming and program test time is drastically reduced

                                                                      The C run-time library contains many standard routines such as formatted output

                                                                      numeric conversions and floating-point arithmetic

                                                                      Existing program parts can be more easily included into new programs because of

                                                                      modular program construction techniques

                                                                      The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                      wide popular support and is easily obtained for most systems Existing program

                                                                      investments can be quickly adapted to other processors as needed

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1112 Software Development Cycle in Keil

                                                                      When we use the Keil Software tools the

                                                                      project development cycle is roughly the same as

                                                                      it is for any other software development project

                                                                      1 Create a project select the target chip from the

                                                                      device database and configure the tool settings

                                                                      2 Create source files in C or assembly

                                                                      3 Build your application with the project

                                                                      manager

                                                                      4 Correct errors in source files

                                                                      5 Test the linked application A block diagram of

                                                                      the complete 8051 tool set may best illustrate the

                                                                      development cycle

                                                                      112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                      1121 Schematic Editor

                                                                      In this one can develop amp design circuits for the required PCB

                                                                      1122 Layout Editor

                                                                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                      Fig 111 Software development in KEIL

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1123 Library Editor

                                                                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                      1124 Auto Router

                                                                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                      the PCB tracks designed

                                                                      1125 Cam Processor

                                                                      This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                      Bottom Layer Component Layer Masking Layer etc

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                      Start

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 12

                                                                      INTRODUCTION

                                                                      OF

                                                                      PROGRAMMING

                                                                      Flowchart of programming

                                                                      Program code

                                                                      121 Flowchart

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                      2

                                                                      flag9==1

                                                                      flag9=1

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                      flag11==1

                                                                      flag11=1 flag11=0 flag4=0

                                                                      REady_LED4=0

                                                                      Sw2_op (P01) ==0

                                                                      My delay (10)

                                                                      3 3

                                                                      flag2=1 disp2=1 k2=0

                                                                      3

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                      4

                                                                      flag11==1

                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                      flag11=1

                                                                      My delay (10)

                                                                      flag3=1 disp3=1 k3=0

                                                                      k1==0||k2==0||k4==0

                                                                      Sw3_op (P02) ==0

                                                                      5

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                      flag5==1

                                                                      5

                                                                      flag11==1

                                                                      flag7=1

                                                                      flag7==1

                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                      6

                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                      flag11=1

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                      6

                                                                      My delay (10)

                                                                      flag4=1 disp4=1 k4=0

                                                                      k1==0||k2==0||k3==0 flag5==1

                                                                      7

                                                                      Sw4_op (P03) ==0

                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                      7

                                                                      flag7==1

                                                                      flag9==1

                                                                      flag7=1

                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                      flag9=0 flag3=0 REady_LED3=0

                                                                      flag9=1

                                                                      Sw5_op A(P04) ==0

                                                                      My delay (10)

                                                                      8

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                      9

                                                                      flag2==1

                                                                      flag3==1

                                                                      8

                                                                      flag1==1

                                                                      flag4==1 flag5=1 disp5=1

                                                                      flag9=1 disp5=1

                                                                      flag7=1 disp5=1

                                                                      flag11=1 disp5=1

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                      Sw6_op (P05) ==0

                                                                      My delay (10)

                                                                      flag2==1 ampamp flag7==1

                                                                      flag3==1 ampamp flag9==1 9

                                                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                      flag8=1 disp6=1

                                                                      10

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                      10

                                                                      flag4==1 ampamp flag11==1

                                                                      flag10=1 disp6=1

                                                                      flag12=1 disp6=1

                                                                      flag8==1

                                                                      flag10==1

                                                                      11

                                                                      flag6==1

                                                                      i++

                                                                      l++

                                                                      j++

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                      flag12==1

                                                                      M++

                                                                      11

                                                                      Stop

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      122 Program

                                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                      define buzzerP2_0 buzzer indication

                                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                      output Led for indication

                                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                      function prototype declaration

                                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                                      void init_timer() timer 0 initialization function

                                                                      variable declaration

                                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      start of main programme

                                                                      void main()

                                                                      init_timer() call it timer initialization function

                                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                      start of while loop

                                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                      condition for switch1

                                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                      if(iltk) loop will repeat for desired time of charging

                                                                      if(igt=1000)

                                                                      buzzer=1 turn on buzzer if (ii==20)

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      REady_LED1=1 turn on ready indication of led1

                                                                      else if(ii==40)

                                                                      REady_LED1=0ii=0

                                                                      elseREady_LED1=0

                                                                      START_LED1=1

                                                                      else

                                                                      START_LED1=0

                                                                      k1=1 buzzer=0

                                                                      REady_LED1=0 flag1=0

                                                                      flag5=0flag6=0

                                                                      condition for switch2

                                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                                      REady_LED2=1 turn on ready 2 led indication

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      disp2=0

                                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                      if(jltk)

                                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                      elseREady_LED2=0

                                                                      START_LED2=1

                                                                      else START_LED2=0

                                                                      REady_LED2=0 k2=1 buzzer=0

                                                                      flag2=0flag7=0flag8=0

                                                                      j=0jj=0

                                                                      condition for switch 3

                                                                      if(flag3==1) check swich3 pressed

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      if(disp3==1 )

                                                                      REady_LED3=1 disp3=0

                                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                      if(lltk)

                                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                      elseREady_LED3=0

                                                                      START_LED3=1

                                                                      else START_LED3=0

                                                                      LED2=0 k3=1 buzzer=0

                                                                      REady_LED3=0 flag3=0

                                                                      flag9=0flag10=0

                                                                      l=0ll=0

                                                                      condition for switch 4

                                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      REady_LED4=1 disp4=0

                                                                      if(flag11==1) check coin is pressed

                                                                      if(flag12==1) START is pressed

                                                                      if(mltk)

                                                                      if(mgt1000)

                                                                      buzzer=1 if(mm==20)

                                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                      elseREady_LED4=0

                                                                      START_LED4=1

                                                                      else START_LED4=0

                                                                      buzzer=0 k4=1

                                                                      REady_LED4=0 flag4=0

                                                                      flag11=0flag12=0

                                                                      m=0mm=0

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      while(1)

                                                                      end of main programme

                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                      if(flag7==1) SET THE FLAG

                                                                      flag7=1

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                      flag9=1

                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                      flag11=1

                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                      my_delay (10)

                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                      if(flag5==1)

                                                                      flag5=1

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                      flag9=1

                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                      flag11=1

                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                      if(flag7==1)

                                                                      flag7=1

                                                                      else

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                      flag5=1

                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                      flag11=1

                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                      if(flag7==1)

                                                                      flag7=1

                                                                      elseflag7=0

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                      flag5=1

                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                      flag9=1

                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                      if(flag6==1)

                                                                      i++ if (igt1000) ii++

                                                                      if (flag8==1)

                                                                      j++ if(jgt1000) jj++

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      if (flag10==1)

                                                                      l++ if (lgt1000) ll++

                                                                      if (flag12==1)

                                                                      m++ if (mgt1000) mm++

                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 13

                                                                      TROUBLE SHOOT

                                                                      Troubleshoot

                                                                      131 TROUBLE SHOOT

                                                                      A newly assembled circuit does not work may be due to -

                                                                      Faulty components

                                                                      Improper soldering

                                                                      Wrong connections

                                                                      Also any stop in working after some period may be due to -

                                                                      Component failure

                                                                      Supply failure

                                                                      Damaging of PCB

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                      proper soldering

                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                      Resistance measurement is also done which is known as Dry test

                                                                      During this project work some green LEDs was not glow then we checked it

                                                                      continuity and replace it

                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                      during soldering PCB We solved that problem

                                                                      CHAPTER 14

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      ADVANTAGES OF

                                                                      THE PROJECT

                                                                      Advantages

                                                                      141 ADVANTAGES OF THE PROJECT

                                                                      Simple and hand efficient Microcontroller based system

                                                                      Fast charging capacity

                                                                      Simple to operate

                                                                      Ease of mobility

                                                                      Facilitates connectivity for 90 of cellular phones

                                                                      Less expensive

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Reduced man power

                                                                      Low power consumption

                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                      CHAPTER 15

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      DISADVANTAGES

                                                                      OF THE PROJECT

                                                                      Disadvantages

                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                      It requires mains supply to work project

                                                                      Due to limited charging channels till now there may be a possibility that

                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                      min

                                                                      It does not have battery backup therefore it cannot be portable

                                                                      CHAPTER 16

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      APPLICATIONS OF

                                                                      THE PROJECT

                                                                      Application

                                                                      161 APPLICATIONS OF THE PROJECT

                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                      charge for the mobile phone in any places

                                                                      It is used for emergency charging purposes

                                                                      It can be installed in malls railway stations bus stops and other public

                                                                      places

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                      any location where there is a high footfall creating a large number of

                                                                      potential users

                                                                      It can be installed in offices and collages for pay charging facility

                                                                      CHAPTER 17

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      FUTURE

                                                                      DEVELOPMENT OF

                                                                      THE PROJECT

                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                      This project is very useful to people who are using mobile phone without charging

                                                                      condition in public places

                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                      It will provide battery backup for make it portable

                                                                      It will also provide SMS system in future

                                                                      We can also increase the charging time by editing software of the project

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 18

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      COST ANALYSIS

                                                                      OF THE PROJECT

                                                                      COST ANALYSIS OF THE PROJECT

                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                      1811 Component list for power supply card

                                                                      Footprint Quantity Designators Rate

                                                                      Resistor

                                                                      22K 1 R2 1

                                                                      1K 1 R1 1

                                                                      Capacitor

                                                                      1000uf25V 1 C5 10

                                                                      2200uf25V 1 C1 10

                                                                      022uf 2 C6 C2 1

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                      Table 1811 Component list for power supply card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      01uf 2 C4 C3 1

                                                                      IC

                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                      L7812CV (TO-220) 1 U2 8

                                                                      L7805CV (TO-220) 1 U1 8

                                                                      Connector

                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                      CON PHO 3PIN 1 J1 12

                                                                      LED3mm red 2 L1 L2 15

                                                                      Heat sink (TO-220) 2 16

                                                                      Total 955

                                                                      1812 Component list for battery charger card

                                                                      Footprint Quantity Rate

                                                                      Capacitor

                                                                      2200uf25V 1 1000

                                                                      022uf 4 100

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      01uf 4 100

                                                                      IC

                                                                      BRIDGE W10 1 500

                                                                      L7805CV (TO-220) 4 3200

                                                                      Connector

                                                                      CON PHO 2PIN 1 800

                                                                      Relimate 2 pin 1 400

                                                                      relimate 3 pin 4 2000

                                                                      Heat sink (TO-220) 4 1200

                                                                      TOTAL 9300

                                                                      1813 Component list for Relay card

                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                      Table 1812Component list for battery charger card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                      Total 18900

                                                                      1814Component list for controller card

                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                      Table 1813Component list for relay card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                      total 27000

                                                                      1815 Miscellaneous material

                                                                      Material Quantity Rate

                                                                      electronic item

                                                                      Transformer

                                                                      TXR1 0-9-15 1 20000

                                                                      0-9 1A

                                                                      0-15 100mA

                                                                      TXR2 0-9 1 16500

                                                                      0-9 1A

                                                                      Proximity switch 1 20000

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                      Table 1814Component list for microcontroller card

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Red push bottom 4 4000

                                                                      Green push button 1 1000

                                                                      Red led 5mm 4 800

                                                                      Green led 5mm 4 800

                                                                      Led holder 8 1600

                                                                      Copper clad 2 4000

                                                                      3 core cable 1 meter 1500

                                                                      3 pin plug 1 3000

                                                                      2 pin relimate wire 19 9000

                                                                      3 pin relimate wire 5 3750

                                                                      4 pin relimate wire 2 2000

                                                                      mechanical items

                                                                      Enclosure 1 25000

                                                                      Acrylic sheet 2 X 1 30000

                                                                      12mm cable gland 1 1000

                                                                      Screw 3mm 33 2000

                                                                      Screw 35mm 6 2400

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      10 mm spacers 100 1500

                                                                      10mm insert to stud 50 10000

                                                                      cable tie 2500

                                                                      Total 162350

                                                                      CHAPTER 19

                                                                      APPENDIX

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                      Table 1815Component list for miscellaneous material

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      APPENDIX

                                                                      191 APPENDIX

                                                                      1911 78xx IC datasheet

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1912 W10 datasheet

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1913 4n33 IC datasheet

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                      1914 MAX 232

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1915 ULN2003a IC datasheet

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      1916 89V51RD2 IC datasheet

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 20

                                                                      CONCLUSION

                                                                      CONCLUSION

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      201 CONCLUSION

                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                      installed in any business premises

                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                      a high footfall creating a large number of potential users

                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                      extend low mobile phone talk time provide battery charging

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 21

                                                                      IMAGES OF THE

                                                                      PROJECT

                                                                      Images of the project

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      211 IMAGES OF THE PROJECT

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Fig 216 Relay driver circuit

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                      Fig 213 Constant voltage battery charger circuit

                                                                      Fig214 Power supply circuit

                                                                      Fig215 Metal detector proximity switch

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Fig217 Microcontroller circuit

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      CHAPTER 22

                                                                      BIBILOGRAPHY

                                                                      BIBLIOGRAPHY

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                      221 BIBLIOGRAPHY

                                                                      BOOKS

                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                      INTERNET LINKS

                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                      • CHAPTER 1

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        achieve twice the throughput at the same clock frequency Another way to benefit from this

                                                                        feature is to keep the same performance by reducing the clock frequency by half thus

                                                                        dramatically reducing the EMI

                                                                        The Flash program memory supports both parallel programming and in serial In-

                                                                        System Programming (ISP) Parallel programming mode offers gang-programming at high

                                                                        speed reducing programming costs and time to market ISP allows a device to be

                                                                        reprogrammed in the end product under software control The capability to fieldupdate the

                                                                        application firmware makes a wide range of applications possible The P89V51RD2 is also

                                                                        In-Application Programmable (IAP) allowing the Flash program memory to be

                                                                        reconfigured even while the application is running

                                                                        714 RELIMATE CONNECTOR

                                                                        7141 WORKING

                                                                        These are wire to board type connectors used to facilitate

                                                                        proper and firm electrical connection between the relay card and

                                                                        microcontroller card

                                                                        The connector has following specifications

                                                                        No of Ways 2-20

                                                                        Voltage Rating 250V AC DC

                                                                        Current Rating 3A AC DC

                                                                        Contact Resistance 20mW max

                                                                        Insulation Resistance 1000MW min

                                                                        Dielectric Withstanding 1000V ACminute

                                                                        Crimp Terminal Wire Size 22-28 AWG (American wire gauge)

                                                                        The connector used for relay card is 2 PIN and 4 PIN connector Advantage of the

                                                                        connector is it provides a fast and easy connection and disconnection it also avoids polarity

                                                                        conflicts

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 36

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        715 RS-232 PORT CONNECTOR

                                                                        7151 WORKING

                                                                        Almost all digital devices which we use require either TTL

                                                                        or CMOS logic levels Therefore the first step to connecting a

                                                                        device to the RS-232 port is to transform the RS-232 levels back

                                                                        into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                        Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                        Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                        The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                        problem in many instances where only a single supply of +5V is present

                                                                        CHAPTER 8

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        IMPLIMENTATION

                                                                        OF THE PCB

                                                                        Components layout designing

                                                                        Developing or Etching the PCB

                                                                        Other operations like Drilling Cutting Tinning

                                                                        81 IMPLIMENTATION OF THE PCB

                                                                        A proper PCB ensure that various circuit components are interconnected as per the

                                                                        circuit diagram once they have been placed on the PCB in their proper positions and

                                                                        subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                        base material to which is permanently attached a flat metallic network of conducting path

                                                                        whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                        for this project is single one

                                                                        The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                        board configuration however is most widely used and it may be of the nature of the single

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                        which ensures adequate and permanent low resistance coupling

                                                                        811 BOARD DESIGN

                                                                        PCB designed is the most important and requires great care during work In this case

                                                                        great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                        is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                        take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                        unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                        also help to solve this problem when circuit is complicated

                                                                        812 THE MASTER DIAGRAM

                                                                        The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                        which is commonly made twice as the finished circuit since this makes the working on that

                                                                        much easier especially when circuit is complicated photography eventually reduces the

                                                                        size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                        the designing -

                                                                        a The space between the conductors must be strictly controlled to avoid the possibility

                                                                        of electrical discharges or unwanted capacitance The amount by which the mater

                                                                        diagram is to reduce in size is thus a critical deign feature

                                                                        b The conductor must be wider in those part of the circuits that are going to handle

                                                                        large current must be handle without undue temperature of conductors

                                                                        c The minimum width of copper should not generally be less than about 15mmThis

                                                                        is related to mechanical strength rather than electrical properties and it also ensure

                                                                        that strips remains securely bounded to the base material

                                                                        d The points where the component holes for component lead wire occurs must be sited

                                                                        to suit the dimensions of the component and dimensions between lead-out wire so

                                                                        that the components can be situated correctly on finished board The conductor is

                                                                        also main large at the point of holes

                                                                        813 PCB MAKING

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        When the mater diagram probable twice the size of real PCB has been evolved the

                                                                        test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                        board to create a circuit as depicted by master diagram It must be stressed that very

                                                                        accurate checking master is essential at this stage Then the master point is mounted on a

                                                                        special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                        illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                        developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                        brought into operation This comprises the camera body mounted so that sideways after

                                                                        each exposure In this way number of copies of the original master diagram is set out

                                                                        exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                        In case of simple and need of number of less PCB economic and advisable to use the

                                                                        following lab method of PCB making

                                                                        Planning The Circuit

                                                                        It is not a particular difficult There are several important factors that need not be

                                                                        taken into account if the finished device is to work properly we must consider gain factor

                                                                        and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                        possibility We must also ensure that conductors and components carrying high frequency

                                                                        current are well separated from the part of the circuit We are also to make sure that all

                                                                        components need to return to earth are properly connected and that possibility of common

                                                                        impedance arising earth returned

                                                                        Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                        with nature of design Other factors that have to successfully studied include availability of

                                                                        adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                        made for mechanical fixing ventilation effect of vibration

                                                                        Cleaning The Board

                                                                        The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                        transferred to it This is important because even slightest trace of graze (from figure of

                                                                        instance) will impure the etching process and when the circuit plan has been neatly

                                                                        transferred to copper in this manner the board is held under running tap and the allowed to

                                                                        dry before resist is applied

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Transforming the Plan

                                                                        Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                        A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                        board and working plan and carefully trace the lines of original plan with a ball pen

                                                                        Resist

                                                                        Resist is nothing more than a substrate that is unaffected by presence etching

                                                                        chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                        clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                        covered when resists the leaguer type of paints possess good resist properties but

                                                                        disadvantage of relatively long time taken for drying It is essential to resist through

                                                                        hardening before etching is started Nail polished are better as they quickly and are less

                                                                        difficult to remove

                                                                        To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                        PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                        short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                        in different sizes

                                                                        Correcting Error

                                                                        When a result has been thoroughly hardened any errors that have been made can

                                                                        usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                        edges of copper conductors on board the resist must be applied with steady band

                                                                        Etching

                                                                        Next comes etching of unwanted copper amp whether a small single is all that is

                                                                        required as quantity of board to be produce certain precautions must be taken before

                                                                        operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                        quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                        etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                        grams of water

                                                                        Agitation

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                        the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                        laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                        gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                        temperature and thickness of copper foil

                                                                        Finishing Off

                                                                        When all unwanted copper is dissolved from areas between conductor board should

                                                                        be taken from an etchant amp washed in water The resist must be removed using proper

                                                                        solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                        seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                        PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                        This process is called Tinning This process of coating involve track with soldier

                                                                        Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                        ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                        Assembling On PCB

                                                                        After the holes are drilled the component have to be assembled on PCB before

                                                                        assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                        accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                        repetitive use cleans soldering iron

                                                                        CHAPTER 9

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        SOLDERING

                                                                        TECHNIQUE

                                                                        Technique for good soldering

                                                                        91 SOLDERING TECHNIQUE

                                                                        For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                        oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                        Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                        applied should be such that when solder wire is touched to joint it must melt

                                                                        quickly

                                                                        The joint and the soldering iron is held such that molten solder should flow

                                                                        smoothly over the joint

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        When joint is completely covered with molten solder the soldering iron is re-

                                                                        moved

                                                                        The joint is allowed to cool without any movement

                                                                        The bright shining solder indicates good soldering

                                                                        In case of dry solder joint a air gap remains in between the solder material and

                                                                        the joint It means that soldering is improper This is removed and again solder-

                                                                        ing is done

                                                                        Thus this way all the components are soldered on P C B

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 10

                                                                        PCB LAYOUTS

                                                                        Schematic diagram

                                                                        Bottom and top layout

                                                                        101 POWER SUPPLY CARD

                                                                        1011 SCHIMETIC DIAGRAM

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1012 LEGEND MARKING

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                        Fig1011 Schematic diagram of power supply card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1013TOP LAYER

                                                                        1014 BOTTOM LAYER

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                        Fig1013 Top layer of power supply

                                                                        card

                                                                        Fig1014 Schematic diagram of power supply card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        102 BATTERY CHARGER CARD

                                                                        1021 SCHEMATIC DIAGRAM

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                        Fig1021 Schematic diagram of battery charger card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        103 RELAY CARD

                                                                        1031 SCHIMETIC DIAGRAM

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                        Fig1031 Schematic diagram of Relay card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1032 RELAY CARD LEGEND MARKING

                                                                        1033 TOP LAYER

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                        Fig1032 Legend marking of Relay card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1034 BOTTOM LAYER

                                                                        104 MICROCONTROLER CARD

                                                                        1041 SCHIMETIC DIAGRAM

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                        Fig1034 Bottom layer of Relay card

                                                                        Fig1041 Schematic diagram of microcontroller card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1042 ALL LAYERS

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                        Fig1042 All layer of microcontroller card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 11

                                                                        INTRODUCTION

                                                                        OF SOFTWARE

                                                                        Keil (microVision 2)

                                                                        Eagle (Easily Applicable Graphical Layout Editor)

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        111 Keil (microVision 2)

                                                                        1111 Introduction to C51 Cross Compiler

                                                                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                        generates object code that matches the efficiency and speed of assembly programming

                                                                        Using a high-level language like C has many advantages over assembly language

                                                                        programming

                                                                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                        the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                        Details like register allocation and addressing of the various memory types and data

                                                                        types is managed by the compiler

                                                                        Programs get a formal structure (which is imposed by the C programming language) and

                                                                        can be divided into separate functions This contributes to source code reusability as

                                                                        well as better overall application structure

                                                                        The ability to combine variable selection with specific operations improves program

                                                                        readability

                                                                        Keywords and operational functions that more nearly resemble the human thought

                                                                        process may be used

                                                                        Programming and program test time is drastically reduced

                                                                        The C run-time library contains many standard routines such as formatted output

                                                                        numeric conversions and floating-point arithmetic

                                                                        Existing program parts can be more easily included into new programs because of

                                                                        modular program construction techniques

                                                                        The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                        wide popular support and is easily obtained for most systems Existing program

                                                                        investments can be quickly adapted to other processors as needed

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1112 Software Development Cycle in Keil

                                                                        When we use the Keil Software tools the

                                                                        project development cycle is roughly the same as

                                                                        it is for any other software development project

                                                                        1 Create a project select the target chip from the

                                                                        device database and configure the tool settings

                                                                        2 Create source files in C or assembly

                                                                        3 Build your application with the project

                                                                        manager

                                                                        4 Correct errors in source files

                                                                        5 Test the linked application A block diagram of

                                                                        the complete 8051 tool set may best illustrate the

                                                                        development cycle

                                                                        112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                        1121 Schematic Editor

                                                                        In this one can develop amp design circuits for the required PCB

                                                                        1122 Layout Editor

                                                                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                        Fig 111 Software development in KEIL

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1123 Library Editor

                                                                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                        1124 Auto Router

                                                                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                        the PCB tracks designed

                                                                        1125 Cam Processor

                                                                        This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                        Bottom Layer Component Layer Masking Layer etc

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                        Start

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 12

                                                                        INTRODUCTION

                                                                        OF

                                                                        PROGRAMMING

                                                                        Flowchart of programming

                                                                        Program code

                                                                        121 Flowchart

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                        2

                                                                        flag9==1

                                                                        flag9=1

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                        flag11==1

                                                                        flag11=1 flag11=0 flag4=0

                                                                        REady_LED4=0

                                                                        Sw2_op (P01) ==0

                                                                        My delay (10)

                                                                        3 3

                                                                        flag2=1 disp2=1 k2=0

                                                                        3

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                        4

                                                                        flag11==1

                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                        flag11=1

                                                                        My delay (10)

                                                                        flag3=1 disp3=1 k3=0

                                                                        k1==0||k2==0||k4==0

                                                                        Sw3_op (P02) ==0

                                                                        5

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                        flag5==1

                                                                        5

                                                                        flag11==1

                                                                        flag7=1

                                                                        flag7==1

                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                        6

                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                        flag11=1

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                        6

                                                                        My delay (10)

                                                                        flag4=1 disp4=1 k4=0

                                                                        k1==0||k2==0||k3==0 flag5==1

                                                                        7

                                                                        Sw4_op (P03) ==0

                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                        7

                                                                        flag7==1

                                                                        flag9==1

                                                                        flag7=1

                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                        flag9=0 flag3=0 REady_LED3=0

                                                                        flag9=1

                                                                        Sw5_op A(P04) ==0

                                                                        My delay (10)

                                                                        8

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                        9

                                                                        flag2==1

                                                                        flag3==1

                                                                        8

                                                                        flag1==1

                                                                        flag4==1 flag5=1 disp5=1

                                                                        flag9=1 disp5=1

                                                                        flag7=1 disp5=1

                                                                        flag11=1 disp5=1

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                        Sw6_op (P05) ==0

                                                                        My delay (10)

                                                                        flag2==1 ampamp flag7==1

                                                                        flag3==1 ampamp flag9==1 9

                                                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                        flag8=1 disp6=1

                                                                        10

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                        10

                                                                        flag4==1 ampamp flag11==1

                                                                        flag10=1 disp6=1

                                                                        flag12=1 disp6=1

                                                                        flag8==1

                                                                        flag10==1

                                                                        11

                                                                        flag6==1

                                                                        i++

                                                                        l++

                                                                        j++

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                        flag12==1

                                                                        M++

                                                                        11

                                                                        Stop

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        122 Program

                                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                        define buzzerP2_0 buzzer indication

                                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                        output Led for indication

                                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                        function prototype declaration

                                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                                        void init_timer() timer 0 initialization function

                                                                        variable declaration

                                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        start of main programme

                                                                        void main()

                                                                        init_timer() call it timer initialization function

                                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                        start of while loop

                                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                        condition for switch1

                                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                        if(iltk) loop will repeat for desired time of charging

                                                                        if(igt=1000)

                                                                        buzzer=1 turn on buzzer if (ii==20)

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        REady_LED1=1 turn on ready indication of led1

                                                                        else if(ii==40)

                                                                        REady_LED1=0ii=0

                                                                        elseREady_LED1=0

                                                                        START_LED1=1

                                                                        else

                                                                        START_LED1=0

                                                                        k1=1 buzzer=0

                                                                        REady_LED1=0 flag1=0

                                                                        flag5=0flag6=0

                                                                        condition for switch2

                                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                                        REady_LED2=1 turn on ready 2 led indication

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        disp2=0

                                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                        if(jltk)

                                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                        elseREady_LED2=0

                                                                        START_LED2=1

                                                                        else START_LED2=0

                                                                        REady_LED2=0 k2=1 buzzer=0

                                                                        flag2=0flag7=0flag8=0

                                                                        j=0jj=0

                                                                        condition for switch 3

                                                                        if(flag3==1) check swich3 pressed

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        if(disp3==1 )

                                                                        REady_LED3=1 disp3=0

                                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                        if(lltk)

                                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                        elseREady_LED3=0

                                                                        START_LED3=1

                                                                        else START_LED3=0

                                                                        LED2=0 k3=1 buzzer=0

                                                                        REady_LED3=0 flag3=0

                                                                        flag9=0flag10=0

                                                                        l=0ll=0

                                                                        condition for switch 4

                                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        REady_LED4=1 disp4=0

                                                                        if(flag11==1) check coin is pressed

                                                                        if(flag12==1) START is pressed

                                                                        if(mltk)

                                                                        if(mgt1000)

                                                                        buzzer=1 if(mm==20)

                                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                        elseREady_LED4=0

                                                                        START_LED4=1

                                                                        else START_LED4=0

                                                                        buzzer=0 k4=1

                                                                        REady_LED4=0 flag4=0

                                                                        flag11=0flag12=0

                                                                        m=0mm=0

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        while(1)

                                                                        end of main programme

                                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                        whenever specific time the interrupt will generate control will go in following function

                                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if(sw1_op==0 ) ready switch flag for system1

                                                                        my_delay(10) CALL DELAY FUNCTION

                                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                        if(flag7==1) SET THE FLAG

                                                                        flag7=1

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                        flag9=1

                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                        flag11=1

                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                        my_delay (10)

                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                        if(flag5==1)

                                                                        flag5=1

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                        flag9=1

                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                        flag11=1

                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                        if(flag7==1)

                                                                        flag7=1

                                                                        else

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                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                        flag5=1

                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                        flag11=1

                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                        if(flag7==1)

                                                                        flag7=1

                                                                        elseflag7=0

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                        flag5=1

                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                        flag9=1

                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                        if(flag6==1)

                                                                        i++ if (igt1000) ii++

                                                                        if (flag8==1)

                                                                        j++ if(jgt1000) jj++

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        if (flag10==1)

                                                                        l++ if (lgt1000) ll++

                                                                        if (flag12==1)

                                                                        m++ if (mgt1000) mm++

                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 13

                                                                        TROUBLE SHOOT

                                                                        Troubleshoot

                                                                        131 TROUBLE SHOOT

                                                                        A newly assembled circuit does not work may be due to -

                                                                        Faulty components

                                                                        Improper soldering

                                                                        Wrong connections

                                                                        Also any stop in working after some period may be due to -

                                                                        Component failure

                                                                        Supply failure

                                                                        Damaging of PCB

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                        proper soldering

                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                        Resistance measurement is also done which is known as Dry test

                                                                        During this project work some green LEDs was not glow then we checked it

                                                                        continuity and replace it

                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                        during soldering PCB We solved that problem

                                                                        CHAPTER 14

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        ADVANTAGES OF

                                                                        THE PROJECT

                                                                        Advantages

                                                                        141 ADVANTAGES OF THE PROJECT

                                                                        Simple and hand efficient Microcontroller based system

                                                                        Fast charging capacity

                                                                        Simple to operate

                                                                        Ease of mobility

                                                                        Facilitates connectivity for 90 of cellular phones

                                                                        Less expensive

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Reduced man power

                                                                        Low power consumption

                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                        CHAPTER 15

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        DISADVANTAGES

                                                                        OF THE PROJECT

                                                                        Disadvantages

                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                        It requires mains supply to work project

                                                                        Due to limited charging channels till now there may be a possibility that

                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                        min

                                                                        It does not have battery backup therefore it cannot be portable

                                                                        CHAPTER 16

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        APPLICATIONS OF

                                                                        THE PROJECT

                                                                        Application

                                                                        161 APPLICATIONS OF THE PROJECT

                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                        charge for the mobile phone in any places

                                                                        It is used for emergency charging purposes

                                                                        It can be installed in malls railway stations bus stops and other public

                                                                        places

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                        any location where there is a high footfall creating a large number of

                                                                        potential users

                                                                        It can be installed in offices and collages for pay charging facility

                                                                        CHAPTER 17

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        FUTURE

                                                                        DEVELOPMENT OF

                                                                        THE PROJECT

                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                        This project is very useful to people who are using mobile phone without charging

                                                                        condition in public places

                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                        It will provide battery backup for make it portable

                                                                        It will also provide SMS system in future

                                                                        We can also increase the charging time by editing software of the project

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 18

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        COST ANALYSIS

                                                                        OF THE PROJECT

                                                                        COST ANALYSIS OF THE PROJECT

                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                        1811 Component list for power supply card

                                                                        Footprint Quantity Designators Rate

                                                                        Resistor

                                                                        22K 1 R2 1

                                                                        1K 1 R1 1

                                                                        Capacitor

                                                                        1000uf25V 1 C5 10

                                                                        2200uf25V 1 C1 10

                                                                        022uf 2 C6 C2 1

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                        Table 1811 Component list for power supply card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        01uf 2 C4 C3 1

                                                                        IC

                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                        L7812CV (TO-220) 1 U2 8

                                                                        L7805CV (TO-220) 1 U1 8

                                                                        Connector

                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                        CON PHO 3PIN 1 J1 12

                                                                        LED3mm red 2 L1 L2 15

                                                                        Heat sink (TO-220) 2 16

                                                                        Total 955

                                                                        1812 Component list for battery charger card

                                                                        Footprint Quantity Rate

                                                                        Capacitor

                                                                        2200uf25V 1 1000

                                                                        022uf 4 100

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        01uf 4 100

                                                                        IC

                                                                        BRIDGE W10 1 500

                                                                        L7805CV (TO-220) 4 3200

                                                                        Connector

                                                                        CON PHO 2PIN 1 800

                                                                        Relimate 2 pin 1 400

                                                                        relimate 3 pin 4 2000

                                                                        Heat sink (TO-220) 4 1200

                                                                        TOTAL 9300

                                                                        1813 Component list for Relay card

                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                        Table 1812Component list for battery charger card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                        Total 18900

                                                                        1814Component list for controller card

                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                        Table 1813Component list for relay card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                        total 27000

                                                                        1815 Miscellaneous material

                                                                        Material Quantity Rate

                                                                        electronic item

                                                                        Transformer

                                                                        TXR1 0-9-15 1 20000

                                                                        0-9 1A

                                                                        0-15 100mA

                                                                        TXR2 0-9 1 16500

                                                                        0-9 1A

                                                                        Proximity switch 1 20000

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                        Table 1814Component list for microcontroller card

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Red push bottom 4 4000

                                                                        Green push button 1 1000

                                                                        Red led 5mm 4 800

                                                                        Green led 5mm 4 800

                                                                        Led holder 8 1600

                                                                        Copper clad 2 4000

                                                                        3 core cable 1 meter 1500

                                                                        3 pin plug 1 3000

                                                                        2 pin relimate wire 19 9000

                                                                        3 pin relimate wire 5 3750

                                                                        4 pin relimate wire 2 2000

                                                                        mechanical items

                                                                        Enclosure 1 25000

                                                                        Acrylic sheet 2 X 1 30000

                                                                        12mm cable gland 1 1000

                                                                        Screw 3mm 33 2000

                                                                        Screw 35mm 6 2400

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        10 mm spacers 100 1500

                                                                        10mm insert to stud 50 10000

                                                                        cable tie 2500

                                                                        Total 162350

                                                                        CHAPTER 19

                                                                        APPENDIX

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                        Table 1815Component list for miscellaneous material

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        APPENDIX

                                                                        191 APPENDIX

                                                                        1911 78xx IC datasheet

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1912 W10 datasheet

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1913 4n33 IC datasheet

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                        1914 MAX 232

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1915 ULN2003a IC datasheet

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        1916 89V51RD2 IC datasheet

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 20

                                                                        CONCLUSION

                                                                        CONCLUSION

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        201 CONCLUSION

                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                        installed in any business premises

                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                        a high footfall creating a large number of potential users

                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                        extend low mobile phone talk time provide battery charging

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 21

                                                                        IMAGES OF THE

                                                                        PROJECT

                                                                        Images of the project

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        211 IMAGES OF THE PROJECT

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Fig 216 Relay driver circuit

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                        Fig 213 Constant voltage battery charger circuit

                                                                        Fig214 Power supply circuit

                                                                        Fig215 Metal detector proximity switch

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Fig217 Microcontroller circuit

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        CHAPTER 22

                                                                        BIBILOGRAPHY

                                                                        BIBLIOGRAPHY

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                        221 BIBLIOGRAPHY

                                                                        BOOKS

                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                        INTERNET LINKS

                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                        • CHAPTER 1

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          715 RS-232 PORT CONNECTOR

                                                                          7151 WORKING

                                                                          Almost all digital devices which we use require either TTL

                                                                          or CMOS logic levels Therefore the first step to connecting a

                                                                          device to the RS-232 port is to transform the RS-232 levels back

                                                                          into 0 and 5 Volts This is done by RS-232 Level Converters

                                                                          Two common RS-232 Level Converters are the 1488 RS-232 Driver and the 1489 RS-232

                                                                          Receiver Each package contains 4 inverters of the one type either Drivers or Receivers

                                                                          The driver requires two supply rails +75 to +15v and -75 to -15v This may pose a

                                                                          problem in many instances where only a single supply of +5V is present

                                                                          CHAPTER 8

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 37

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          IMPLIMENTATION

                                                                          OF THE PCB

                                                                          Components layout designing

                                                                          Developing or Etching the PCB

                                                                          Other operations like Drilling Cutting Tinning

                                                                          81 IMPLIMENTATION OF THE PCB

                                                                          A proper PCB ensure that various circuit components are interconnected as per the

                                                                          circuit diagram once they have been placed on the PCB in their proper positions and

                                                                          subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                          base material to which is permanently attached a flat metallic network of conducting path

                                                                          whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                          for this project is single one

                                                                          The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                          board configuration however is most widely used and it may be of the nature of the single

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                          which ensures adequate and permanent low resistance coupling

                                                                          811 BOARD DESIGN

                                                                          PCB designed is the most important and requires great care during work In this case

                                                                          great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                          is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                          take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                          unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                          also help to solve this problem when circuit is complicated

                                                                          812 THE MASTER DIAGRAM

                                                                          The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                          which is commonly made twice as the finished circuit since this makes the working on that

                                                                          much easier especially when circuit is complicated photography eventually reduces the

                                                                          size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                          the designing -

                                                                          a The space between the conductors must be strictly controlled to avoid the possibility

                                                                          of electrical discharges or unwanted capacitance The amount by which the mater

                                                                          diagram is to reduce in size is thus a critical deign feature

                                                                          b The conductor must be wider in those part of the circuits that are going to handle

                                                                          large current must be handle without undue temperature of conductors

                                                                          c The minimum width of copper should not generally be less than about 15mmThis

                                                                          is related to mechanical strength rather than electrical properties and it also ensure

                                                                          that strips remains securely bounded to the base material

                                                                          d The points where the component holes for component lead wire occurs must be sited

                                                                          to suit the dimensions of the component and dimensions between lead-out wire so

                                                                          that the components can be situated correctly on finished board The conductor is

                                                                          also main large at the point of holes

                                                                          813 PCB MAKING

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          When the mater diagram probable twice the size of real PCB has been evolved the

                                                                          test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                          board to create a circuit as depicted by master diagram It must be stressed that very

                                                                          accurate checking master is essential at this stage Then the master point is mounted on a

                                                                          special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                          illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                          developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                          brought into operation This comprises the camera body mounted so that sideways after

                                                                          each exposure In this way number of copies of the original master diagram is set out

                                                                          exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                          In case of simple and need of number of less PCB economic and advisable to use the

                                                                          following lab method of PCB making

                                                                          Planning The Circuit

                                                                          It is not a particular difficult There are several important factors that need not be

                                                                          taken into account if the finished device is to work properly we must consider gain factor

                                                                          and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                          possibility We must also ensure that conductors and components carrying high frequency

                                                                          current are well separated from the part of the circuit We are also to make sure that all

                                                                          components need to return to earth are properly connected and that possibility of common

                                                                          impedance arising earth returned

                                                                          Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                          with nature of design Other factors that have to successfully studied include availability of

                                                                          adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                          made for mechanical fixing ventilation effect of vibration

                                                                          Cleaning The Board

                                                                          The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                          transferred to it This is important because even slightest trace of graze (from figure of

                                                                          instance) will impure the etching process and when the circuit plan has been neatly

                                                                          transferred to copper in this manner the board is held under running tap and the allowed to

                                                                          dry before resist is applied

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Transforming the Plan

                                                                          Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                          A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                          board and working plan and carefully trace the lines of original plan with a ball pen

                                                                          Resist

                                                                          Resist is nothing more than a substrate that is unaffected by presence etching

                                                                          chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                          clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                          covered when resists the leaguer type of paints possess good resist properties but

                                                                          disadvantage of relatively long time taken for drying It is essential to resist through

                                                                          hardening before etching is started Nail polished are better as they quickly and are less

                                                                          difficult to remove

                                                                          To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                          PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                          short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                          in different sizes

                                                                          Correcting Error

                                                                          When a result has been thoroughly hardened any errors that have been made can

                                                                          usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                          edges of copper conductors on board the resist must be applied with steady band

                                                                          Etching

                                                                          Next comes etching of unwanted copper amp whether a small single is all that is

                                                                          required as quantity of board to be produce certain precautions must be taken before

                                                                          operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                          quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                          etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                          grams of water

                                                                          Agitation

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                          the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                          laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                          gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                          temperature and thickness of copper foil

                                                                          Finishing Off

                                                                          When all unwanted copper is dissolved from areas between conductor board should

                                                                          be taken from an etchant amp washed in water The resist must be removed using proper

                                                                          solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                          seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                          PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                          This process is called Tinning This process of coating involve track with soldier

                                                                          Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                          ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                          Assembling On PCB

                                                                          After the holes are drilled the component have to be assembled on PCB before

                                                                          assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                          accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                          repetitive use cleans soldering iron

                                                                          CHAPTER 9

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          SOLDERING

                                                                          TECHNIQUE

                                                                          Technique for good soldering

                                                                          91 SOLDERING TECHNIQUE

                                                                          For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                          oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                          Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                          applied should be such that when solder wire is touched to joint it must melt

                                                                          quickly

                                                                          The joint and the soldering iron is held such that molten solder should flow

                                                                          smoothly over the joint

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          When joint is completely covered with molten solder the soldering iron is re-

                                                                          moved

                                                                          The joint is allowed to cool without any movement

                                                                          The bright shining solder indicates good soldering

                                                                          In case of dry solder joint a air gap remains in between the solder material and

                                                                          the joint It means that soldering is improper This is removed and again solder-

                                                                          ing is done

                                                                          Thus this way all the components are soldered on P C B

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 10

                                                                          PCB LAYOUTS

                                                                          Schematic diagram

                                                                          Bottom and top layout

                                                                          101 POWER SUPPLY CARD

                                                                          1011 SCHIMETIC DIAGRAM

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1012 LEGEND MARKING

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                          Fig1011 Schematic diagram of power supply card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1013TOP LAYER

                                                                          1014 BOTTOM LAYER

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                          Fig1013 Top layer of power supply

                                                                          card

                                                                          Fig1014 Schematic diagram of power supply card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          102 BATTERY CHARGER CARD

                                                                          1021 SCHEMATIC DIAGRAM

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                          Fig1021 Schematic diagram of battery charger card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          103 RELAY CARD

                                                                          1031 SCHIMETIC DIAGRAM

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                          Fig1031 Schematic diagram of Relay card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1032 RELAY CARD LEGEND MARKING

                                                                          1033 TOP LAYER

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                          Fig1032 Legend marking of Relay card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1034 BOTTOM LAYER

                                                                          104 MICROCONTROLER CARD

                                                                          1041 SCHIMETIC DIAGRAM

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                          Fig1034 Bottom layer of Relay card

                                                                          Fig1041 Schematic diagram of microcontroller card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1042 ALL LAYERS

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                          Fig1042 All layer of microcontroller card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 11

                                                                          INTRODUCTION

                                                                          OF SOFTWARE

                                                                          Keil (microVision 2)

                                                                          Eagle (Easily Applicable Graphical Layout Editor)

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          111 Keil (microVision 2)

                                                                          1111 Introduction to C51 Cross Compiler

                                                                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                          generates object code that matches the efficiency and speed of assembly programming

                                                                          Using a high-level language like C has many advantages over assembly language

                                                                          programming

                                                                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                          the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                          Details like register allocation and addressing of the various memory types and data

                                                                          types is managed by the compiler

                                                                          Programs get a formal structure (which is imposed by the C programming language) and

                                                                          can be divided into separate functions This contributes to source code reusability as

                                                                          well as better overall application structure

                                                                          The ability to combine variable selection with specific operations improves program

                                                                          readability

                                                                          Keywords and operational functions that more nearly resemble the human thought

                                                                          process may be used

                                                                          Programming and program test time is drastically reduced

                                                                          The C run-time library contains many standard routines such as formatted output

                                                                          numeric conversions and floating-point arithmetic

                                                                          Existing program parts can be more easily included into new programs because of

                                                                          modular program construction techniques

                                                                          The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                          wide popular support and is easily obtained for most systems Existing program

                                                                          investments can be quickly adapted to other processors as needed

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1112 Software Development Cycle in Keil

                                                                          When we use the Keil Software tools the

                                                                          project development cycle is roughly the same as

                                                                          it is for any other software development project

                                                                          1 Create a project select the target chip from the

                                                                          device database and configure the tool settings

                                                                          2 Create source files in C or assembly

                                                                          3 Build your application with the project

                                                                          manager

                                                                          4 Correct errors in source files

                                                                          5 Test the linked application A block diagram of

                                                                          the complete 8051 tool set may best illustrate the

                                                                          development cycle

                                                                          112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                          1121 Schematic Editor

                                                                          In this one can develop amp design circuits for the required PCB

                                                                          1122 Layout Editor

                                                                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                          Fig 111 Software development in KEIL

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1123 Library Editor

                                                                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                          1124 Auto Router

                                                                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                          the PCB tracks designed

                                                                          1125 Cam Processor

                                                                          This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                          Bottom Layer Component Layer Masking Layer etc

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                          Start

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 12

                                                                          INTRODUCTION

                                                                          OF

                                                                          PROGRAMMING

                                                                          Flowchart of programming

                                                                          Program code

                                                                          121 Flowchart

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                          2

                                                                          flag9==1

                                                                          flag9=1

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                          flag11==1

                                                                          flag11=1 flag11=0 flag4=0

                                                                          REady_LED4=0

                                                                          Sw2_op (P01) ==0

                                                                          My delay (10)

                                                                          3 3

                                                                          flag2=1 disp2=1 k2=0

                                                                          3

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                          4

                                                                          flag11==1

                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                          flag11=1

                                                                          My delay (10)

                                                                          flag3=1 disp3=1 k3=0

                                                                          k1==0||k2==0||k4==0

                                                                          Sw3_op (P02) ==0

                                                                          5

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                          flag5==1

                                                                          5

                                                                          flag11==1

                                                                          flag7=1

                                                                          flag7==1

                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                          6

                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                          flag11=1

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                          6

                                                                          My delay (10)

                                                                          flag4=1 disp4=1 k4=0

                                                                          k1==0||k2==0||k3==0 flag5==1

                                                                          7

                                                                          Sw4_op (P03) ==0

                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                          7

                                                                          flag7==1

                                                                          flag9==1

                                                                          flag7=1

                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                          flag9=0 flag3=0 REady_LED3=0

                                                                          flag9=1

                                                                          Sw5_op A(P04) ==0

                                                                          My delay (10)

                                                                          8

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                          9

                                                                          flag2==1

                                                                          flag3==1

                                                                          8

                                                                          flag1==1

                                                                          flag4==1 flag5=1 disp5=1

                                                                          flag9=1 disp5=1

                                                                          flag7=1 disp5=1

                                                                          flag11=1 disp5=1

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                          Sw6_op (P05) ==0

                                                                          My delay (10)

                                                                          flag2==1 ampamp flag7==1

                                                                          flag3==1 ampamp flag9==1 9

                                                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                          flag8=1 disp6=1

                                                                          10

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                          10

                                                                          flag4==1 ampamp flag11==1

                                                                          flag10=1 disp6=1

                                                                          flag12=1 disp6=1

                                                                          flag8==1

                                                                          flag10==1

                                                                          11

                                                                          flag6==1

                                                                          i++

                                                                          l++

                                                                          j++

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                          flag12==1

                                                                          M++

                                                                          11

                                                                          Stop

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          122 Program

                                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                          define buzzerP2_0 buzzer indication

                                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                          output Led for indication

                                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                          function prototype declaration

                                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                                          void init_timer() timer 0 initialization function

                                                                          variable declaration

                                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          start of main programme

                                                                          void main()

                                                                          init_timer() call it timer initialization function

                                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                          start of while loop

                                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                          condition for switch1

                                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                          if(iltk) loop will repeat for desired time of charging

                                                                          if(igt=1000)

                                                                          buzzer=1 turn on buzzer if (ii==20)

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          REady_LED1=1 turn on ready indication of led1

                                                                          else if(ii==40)

                                                                          REady_LED1=0ii=0

                                                                          elseREady_LED1=0

                                                                          START_LED1=1

                                                                          else

                                                                          START_LED1=0

                                                                          k1=1 buzzer=0

                                                                          REady_LED1=0 flag1=0

                                                                          flag5=0flag6=0

                                                                          condition for switch2

                                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                                          REady_LED2=1 turn on ready 2 led indication

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          disp2=0

                                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                          if(jltk)

                                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                          elseREady_LED2=0

                                                                          START_LED2=1

                                                                          else START_LED2=0

                                                                          REady_LED2=0 k2=1 buzzer=0

                                                                          flag2=0flag7=0flag8=0

                                                                          j=0jj=0

                                                                          condition for switch 3

                                                                          if(flag3==1) check swich3 pressed

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          if(disp3==1 )

                                                                          REady_LED3=1 disp3=0

                                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                          if(lltk)

                                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                          elseREady_LED3=0

                                                                          START_LED3=1

                                                                          else START_LED3=0

                                                                          LED2=0 k3=1 buzzer=0

                                                                          REady_LED3=0 flag3=0

                                                                          flag9=0flag10=0

                                                                          l=0ll=0

                                                                          condition for switch 4

                                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          REady_LED4=1 disp4=0

                                                                          if(flag11==1) check coin is pressed

                                                                          if(flag12==1) START is pressed

                                                                          if(mltk)

                                                                          if(mgt1000)

                                                                          buzzer=1 if(mm==20)

                                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                          elseREady_LED4=0

                                                                          START_LED4=1

                                                                          else START_LED4=0

                                                                          buzzer=0 k4=1

                                                                          REady_LED4=0 flag4=0

                                                                          flag11=0flag12=0

                                                                          m=0mm=0

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          while(1)

                                                                          end of main programme

                                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                          whenever specific time the interrupt will generate control will go in following function

                                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if(sw1_op==0 ) ready switch flag for system1

                                                                          my_delay(10) CALL DELAY FUNCTION

                                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                          if(flag7==1) SET THE FLAG

                                                                          flag7=1

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                          flag9=1

                                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                          flag11=1

                                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if(sw2_op==0 ) fready switch flag for system2

                                                                          my_delay (10)

                                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                          if(flag5==1)

                                                                          flag5=1

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                          flag9=1

                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                          flag11=1

                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                          if(flag7==1)

                                                                          flag7=1

                                                                          else

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                          flag5=1

                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                          flag11=1

                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                          if(flag7==1)

                                                                          flag7=1

                                                                          elseflag7=0

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                          flag5=1

                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                          flag9=1

                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                          if(flag6==1)

                                                                          i++ if (igt1000) ii++

                                                                          if (flag8==1)

                                                                          j++ if(jgt1000) jj++

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          if (flag10==1)

                                                                          l++ if (lgt1000) ll++

                                                                          if (flag12==1)

                                                                          m++ if (mgt1000) mm++

                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 13

                                                                          TROUBLE SHOOT

                                                                          Troubleshoot

                                                                          131 TROUBLE SHOOT

                                                                          A newly assembled circuit does not work may be due to -

                                                                          Faulty components

                                                                          Improper soldering

                                                                          Wrong connections

                                                                          Also any stop in working after some period may be due to -

                                                                          Component failure

                                                                          Supply failure

                                                                          Damaging of PCB

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                          proper soldering

                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                          Resistance measurement is also done which is known as Dry test

                                                                          During this project work some green LEDs was not glow then we checked it

                                                                          continuity and replace it

                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                          during soldering PCB We solved that problem

                                                                          CHAPTER 14

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          ADVANTAGES OF

                                                                          THE PROJECT

                                                                          Advantages

                                                                          141 ADVANTAGES OF THE PROJECT

                                                                          Simple and hand efficient Microcontroller based system

                                                                          Fast charging capacity

                                                                          Simple to operate

                                                                          Ease of mobility

                                                                          Facilitates connectivity for 90 of cellular phones

                                                                          Less expensive

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Reduced man power

                                                                          Low power consumption

                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                          CHAPTER 15

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          DISADVANTAGES

                                                                          OF THE PROJECT

                                                                          Disadvantages

                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                          It requires mains supply to work project

                                                                          Due to limited charging channels till now there may be a possibility that

                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                          min

                                                                          It does not have battery backup therefore it cannot be portable

                                                                          CHAPTER 16

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          APPLICATIONS OF

                                                                          THE PROJECT

                                                                          Application

                                                                          161 APPLICATIONS OF THE PROJECT

                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                          charge for the mobile phone in any places

                                                                          It is used for emergency charging purposes

                                                                          It can be installed in malls railway stations bus stops and other public

                                                                          places

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                          any location where there is a high footfall creating a large number of

                                                                          potential users

                                                                          It can be installed in offices and collages for pay charging facility

                                                                          CHAPTER 17

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          FUTURE

                                                                          DEVELOPMENT OF

                                                                          THE PROJECT

                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                          This project is very useful to people who are using mobile phone without charging

                                                                          condition in public places

                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                          It will provide battery backup for make it portable

                                                                          It will also provide SMS system in future

                                                                          We can also increase the charging time by editing software of the project

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                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 18

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          COST ANALYSIS

                                                                          OF THE PROJECT

                                                                          COST ANALYSIS OF THE PROJECT

                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                          1811 Component list for power supply card

                                                                          Footprint Quantity Designators Rate

                                                                          Resistor

                                                                          22K 1 R2 1

                                                                          1K 1 R1 1

                                                                          Capacitor

                                                                          1000uf25V 1 C5 10

                                                                          2200uf25V 1 C1 10

                                                                          022uf 2 C6 C2 1

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                          Table 1811 Component list for power supply card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          01uf 2 C4 C3 1

                                                                          IC

                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                          L7812CV (TO-220) 1 U2 8

                                                                          L7805CV (TO-220) 1 U1 8

                                                                          Connector

                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                          CON PHO 3PIN 1 J1 12

                                                                          LED3mm red 2 L1 L2 15

                                                                          Heat sink (TO-220) 2 16

                                                                          Total 955

                                                                          1812 Component list for battery charger card

                                                                          Footprint Quantity Rate

                                                                          Capacitor

                                                                          2200uf25V 1 1000

                                                                          022uf 4 100

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          01uf 4 100

                                                                          IC

                                                                          BRIDGE W10 1 500

                                                                          L7805CV (TO-220) 4 3200

                                                                          Connector

                                                                          CON PHO 2PIN 1 800

                                                                          Relimate 2 pin 1 400

                                                                          relimate 3 pin 4 2000

                                                                          Heat sink (TO-220) 4 1200

                                                                          TOTAL 9300

                                                                          1813 Component list for Relay card

                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                          Table 1812Component list for battery charger card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                          Total 18900

                                                                          1814Component list for controller card

                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                          Table 1813Component list for relay card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                          total 27000

                                                                          1815 Miscellaneous material

                                                                          Material Quantity Rate

                                                                          electronic item

                                                                          Transformer

                                                                          TXR1 0-9-15 1 20000

                                                                          0-9 1A

                                                                          0-15 100mA

                                                                          TXR2 0-9 1 16500

                                                                          0-9 1A

                                                                          Proximity switch 1 20000

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                          Table 1814Component list for microcontroller card

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Red push bottom 4 4000

                                                                          Green push button 1 1000

                                                                          Red led 5mm 4 800

                                                                          Green led 5mm 4 800

                                                                          Led holder 8 1600

                                                                          Copper clad 2 4000

                                                                          3 core cable 1 meter 1500

                                                                          3 pin plug 1 3000

                                                                          2 pin relimate wire 19 9000

                                                                          3 pin relimate wire 5 3750

                                                                          4 pin relimate wire 2 2000

                                                                          mechanical items

                                                                          Enclosure 1 25000

                                                                          Acrylic sheet 2 X 1 30000

                                                                          12mm cable gland 1 1000

                                                                          Screw 3mm 33 2000

                                                                          Screw 35mm 6 2400

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          10 mm spacers 100 1500

                                                                          10mm insert to stud 50 10000

                                                                          cable tie 2500

                                                                          Total 162350

                                                                          CHAPTER 19

                                                                          APPENDIX

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                          Table 1815Component list for miscellaneous material

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          APPENDIX

                                                                          191 APPENDIX

                                                                          1911 78xx IC datasheet

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1912 W10 datasheet

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1913 4n33 IC datasheet

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                          1914 MAX 232

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1915 ULN2003a IC datasheet

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          1916 89V51RD2 IC datasheet

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 20

                                                                          CONCLUSION

                                                                          CONCLUSION

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          201 CONCLUSION

                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                          installed in any business premises

                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                          a high footfall creating a large number of potential users

                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                          extend low mobile phone talk time provide battery charging

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 21

                                                                          IMAGES OF THE

                                                                          PROJECT

                                                                          Images of the project

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          211 IMAGES OF THE PROJECT

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Fig 216 Relay driver circuit

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                          Fig 213 Constant voltage battery charger circuit

                                                                          Fig214 Power supply circuit

                                                                          Fig215 Metal detector proximity switch

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Fig217 Microcontroller circuit

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          CHAPTER 22

                                                                          BIBILOGRAPHY

                                                                          BIBLIOGRAPHY

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                          221 BIBLIOGRAPHY

                                                                          BOOKS

                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                          INTERNET LINKS

                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                          • CHAPTER 1

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            IMPLIMENTATION

                                                                            OF THE PCB

                                                                            Components layout designing

                                                                            Developing or Etching the PCB

                                                                            Other operations like Drilling Cutting Tinning

                                                                            81 IMPLIMENTATION OF THE PCB

                                                                            A proper PCB ensure that various circuit components are interconnected as per the

                                                                            circuit diagram once they have been placed on the PCB in their proper positions and

                                                                            subsequently soldered A Printed Circuit Board (PCB) can be defined as an insulating

                                                                            base material to which is permanently attached a flat metallic network of conducting path

                                                                            whose dimension depends upon the current that can be handled by them Four PCBrsquoS used

                                                                            for this project is single one

                                                                            The basic material used may be resin coated paper fiber glass ceramic and the flat

                                                                            board configuration however is most widely used and it may be of the nature of the single

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 38

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                            which ensures adequate and permanent low resistance coupling

                                                                            811 BOARD DESIGN

                                                                            PCB designed is the most important and requires great care during work In this case

                                                                            great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                            is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                            take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                            unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                            also help to solve this problem when circuit is complicated

                                                                            812 THE MASTER DIAGRAM

                                                                            The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                            which is commonly made twice as the finished circuit since this makes the working on that

                                                                            much easier especially when circuit is complicated photography eventually reduces the

                                                                            size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                            the designing -

                                                                            a The space between the conductors must be strictly controlled to avoid the possibility

                                                                            of electrical discharges or unwanted capacitance The amount by which the mater

                                                                            diagram is to reduce in size is thus a critical deign feature

                                                                            b The conductor must be wider in those part of the circuits that are going to handle

                                                                            large current must be handle without undue temperature of conductors

                                                                            c The minimum width of copper should not generally be less than about 15mmThis

                                                                            is related to mechanical strength rather than electrical properties and it also ensure

                                                                            that strips remains securely bounded to the base material

                                                                            d The points where the component holes for component lead wire occurs must be sited

                                                                            to suit the dimensions of the component and dimensions between lead-out wire so

                                                                            that the components can be situated correctly on finished board The conductor is

                                                                            also main large at the point of holes

                                                                            813 PCB MAKING

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            When the mater diagram probable twice the size of real PCB has been evolved the

                                                                            test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                            board to create a circuit as depicted by master diagram It must be stressed that very

                                                                            accurate checking master is essential at this stage Then the master point is mounted on a

                                                                            special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                            illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                            developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                            brought into operation This comprises the camera body mounted so that sideways after

                                                                            each exposure In this way number of copies of the original master diagram is set out

                                                                            exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                            In case of simple and need of number of less PCB economic and advisable to use the

                                                                            following lab method of PCB making

                                                                            Planning The Circuit

                                                                            It is not a particular difficult There are several important factors that need not be

                                                                            taken into account if the finished device is to work properly we must consider gain factor

                                                                            and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                            possibility We must also ensure that conductors and components carrying high frequency

                                                                            current are well separated from the part of the circuit We are also to make sure that all

                                                                            components need to return to earth are properly connected and that possibility of common

                                                                            impedance arising earth returned

                                                                            Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                            with nature of design Other factors that have to successfully studied include availability of

                                                                            adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                            made for mechanical fixing ventilation effect of vibration

                                                                            Cleaning The Board

                                                                            The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                            transferred to it This is important because even slightest trace of graze (from figure of

                                                                            instance) will impure the etching process and when the circuit plan has been neatly

                                                                            transferred to copper in this manner the board is held under running tap and the allowed to

                                                                            dry before resist is applied

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Transforming the Plan

                                                                            Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                            A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                            board and working plan and carefully trace the lines of original plan with a ball pen

                                                                            Resist

                                                                            Resist is nothing more than a substrate that is unaffected by presence etching

                                                                            chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                            clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                            covered when resists the leaguer type of paints possess good resist properties but

                                                                            disadvantage of relatively long time taken for drying It is essential to resist through

                                                                            hardening before etching is started Nail polished are better as they quickly and are less

                                                                            difficult to remove

                                                                            To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                            PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                            short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                            in different sizes

                                                                            Correcting Error

                                                                            When a result has been thoroughly hardened any errors that have been made can

                                                                            usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                            edges of copper conductors on board the resist must be applied with steady band

                                                                            Etching

                                                                            Next comes etching of unwanted copper amp whether a small single is all that is

                                                                            required as quantity of board to be produce certain precautions must be taken before

                                                                            operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                            quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                            etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                            grams of water

                                                                            Agitation

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                            the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                            laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                            gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                            temperature and thickness of copper foil

                                                                            Finishing Off

                                                                            When all unwanted copper is dissolved from areas between conductor board should

                                                                            be taken from an etchant amp washed in water The resist must be removed using proper

                                                                            solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                            seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                            PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                            This process is called Tinning This process of coating involve track with soldier

                                                                            Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                            ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                            Assembling On PCB

                                                                            After the holes are drilled the component have to be assembled on PCB before

                                                                            assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                            accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                            repetitive use cleans soldering iron

                                                                            CHAPTER 9

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            SOLDERING

                                                                            TECHNIQUE

                                                                            Technique for good soldering

                                                                            91 SOLDERING TECHNIQUE

                                                                            For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                            oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                            Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                            applied should be such that when solder wire is touched to joint it must melt

                                                                            quickly

                                                                            The joint and the soldering iron is held such that molten solder should flow

                                                                            smoothly over the joint

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            When joint is completely covered with molten solder the soldering iron is re-

                                                                            moved

                                                                            The joint is allowed to cool without any movement

                                                                            The bright shining solder indicates good soldering

                                                                            In case of dry solder joint a air gap remains in between the solder material and

                                                                            the joint It means that soldering is improper This is removed and again solder-

                                                                            ing is done

                                                                            Thus this way all the components are soldered on P C B

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 10

                                                                            PCB LAYOUTS

                                                                            Schematic diagram

                                                                            Bottom and top layout

                                                                            101 POWER SUPPLY CARD

                                                                            1011 SCHIMETIC DIAGRAM

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1012 LEGEND MARKING

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                            Fig1011 Schematic diagram of power supply card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1013TOP LAYER

                                                                            1014 BOTTOM LAYER

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                            Fig1013 Top layer of power supply

                                                                            card

                                                                            Fig1014 Schematic diagram of power supply card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            102 BATTERY CHARGER CARD

                                                                            1021 SCHEMATIC DIAGRAM

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                            Fig1021 Schematic diagram of battery charger card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            103 RELAY CARD

                                                                            1031 SCHIMETIC DIAGRAM

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                            Fig1031 Schematic diagram of Relay card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1032 RELAY CARD LEGEND MARKING

                                                                            1033 TOP LAYER

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                            Fig1032 Legend marking of Relay card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1034 BOTTOM LAYER

                                                                            104 MICROCONTROLER CARD

                                                                            1041 SCHIMETIC DIAGRAM

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                            Fig1034 Bottom layer of Relay card

                                                                            Fig1041 Schematic diagram of microcontroller card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1042 ALL LAYERS

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                            Fig1042 All layer of microcontroller card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 11

                                                                            INTRODUCTION

                                                                            OF SOFTWARE

                                                                            Keil (microVision 2)

                                                                            Eagle (Easily Applicable Graphical Layout Editor)

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            111 Keil (microVision 2)

                                                                            1111 Introduction to C51 Cross Compiler

                                                                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                            generates object code that matches the efficiency and speed of assembly programming

                                                                            Using a high-level language like C has many advantages over assembly language

                                                                            programming

                                                                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                            the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                            Details like register allocation and addressing of the various memory types and data

                                                                            types is managed by the compiler

                                                                            Programs get a formal structure (which is imposed by the C programming language) and

                                                                            can be divided into separate functions This contributes to source code reusability as

                                                                            well as better overall application structure

                                                                            The ability to combine variable selection with specific operations improves program

                                                                            readability

                                                                            Keywords and operational functions that more nearly resemble the human thought

                                                                            process may be used

                                                                            Programming and program test time is drastically reduced

                                                                            The C run-time library contains many standard routines such as formatted output

                                                                            numeric conversions and floating-point arithmetic

                                                                            Existing program parts can be more easily included into new programs because of

                                                                            modular program construction techniques

                                                                            The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                            wide popular support and is easily obtained for most systems Existing program

                                                                            investments can be quickly adapted to other processors as needed

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1112 Software Development Cycle in Keil

                                                                            When we use the Keil Software tools the

                                                                            project development cycle is roughly the same as

                                                                            it is for any other software development project

                                                                            1 Create a project select the target chip from the

                                                                            device database and configure the tool settings

                                                                            2 Create source files in C or assembly

                                                                            3 Build your application with the project

                                                                            manager

                                                                            4 Correct errors in source files

                                                                            5 Test the linked application A block diagram of

                                                                            the complete 8051 tool set may best illustrate the

                                                                            development cycle

                                                                            112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                            1121 Schematic Editor

                                                                            In this one can develop amp design circuits for the required PCB

                                                                            1122 Layout Editor

                                                                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                            Fig 111 Software development in KEIL

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1123 Library Editor

                                                                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                            1124 Auto Router

                                                                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                            the PCB tracks designed

                                                                            1125 Cam Processor

                                                                            This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                            Bottom Layer Component Layer Masking Layer etc

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                            Start

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 12

                                                                            INTRODUCTION

                                                                            OF

                                                                            PROGRAMMING

                                                                            Flowchart of programming

                                                                            Program code

                                                                            121 Flowchart

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                            2

                                                                            flag9==1

                                                                            flag9=1

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                            flag11==1

                                                                            flag11=1 flag11=0 flag4=0

                                                                            REady_LED4=0

                                                                            Sw2_op (P01) ==0

                                                                            My delay (10)

                                                                            3 3

                                                                            flag2=1 disp2=1 k2=0

                                                                            3

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                            4

                                                                            flag11==1

                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                            flag11=1

                                                                            My delay (10)

                                                                            flag3=1 disp3=1 k3=0

                                                                            k1==0||k2==0||k4==0

                                                                            Sw3_op (P02) ==0

                                                                            5

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                            flag5==1

                                                                            5

                                                                            flag11==1

                                                                            flag7=1

                                                                            flag7==1

                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                            6

                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                            flag11=1

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                            6

                                                                            My delay (10)

                                                                            flag4=1 disp4=1 k4=0

                                                                            k1==0||k2==0||k3==0 flag5==1

                                                                            7

                                                                            Sw4_op (P03) ==0

                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                            7

                                                                            flag7==1

                                                                            flag9==1

                                                                            flag7=1

                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                            flag9=0 flag3=0 REady_LED3=0

                                                                            flag9=1

                                                                            Sw5_op A(P04) ==0

                                                                            My delay (10)

                                                                            8

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                            9

                                                                            flag2==1

                                                                            flag3==1

                                                                            8

                                                                            flag1==1

                                                                            flag4==1 flag5=1 disp5=1

                                                                            flag9=1 disp5=1

                                                                            flag7=1 disp5=1

                                                                            flag11=1 disp5=1

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                            Sw6_op (P05) ==0

                                                                            My delay (10)

                                                                            flag2==1 ampamp flag7==1

                                                                            flag3==1 ampamp flag9==1 9

                                                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                            flag8=1 disp6=1

                                                                            10

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                            10

                                                                            flag4==1 ampamp flag11==1

                                                                            flag10=1 disp6=1

                                                                            flag12=1 disp6=1

                                                                            flag8==1

                                                                            flag10==1

                                                                            11

                                                                            flag6==1

                                                                            i++

                                                                            l++

                                                                            j++

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                            flag12==1

                                                                            M++

                                                                            11

                                                                            Stop

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            122 Program

                                                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                            define buzzerP2_0 buzzer indication

                                                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                            sbit sw5_op=P0^4 input switch5 for coin

                                                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                            output Led for indication

                                                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                            function prototype declaration

                                                                            void my_delay(unsigned int value) DELAY FUCTION

                                                                            void init_timer() timer 0 initialization function

                                                                            variable declaration

                                                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            start of main programme

                                                                            void main()

                                                                            init_timer() call it timer initialization function

                                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                            start of while loop

                                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                            condition for switch1

                                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                            if(iltk) loop will repeat for desired time of charging

                                                                            if(igt=1000)

                                                                            buzzer=1 turn on buzzer if (ii==20)

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            REady_LED1=1 turn on ready indication of led1

                                                                            else if(ii==40)

                                                                            REady_LED1=0ii=0

                                                                            elseREady_LED1=0

                                                                            START_LED1=1

                                                                            else

                                                                            START_LED1=0

                                                                            k1=1 buzzer=0

                                                                            REady_LED1=0 flag1=0

                                                                            flag5=0flag6=0

                                                                            condition for switch2

                                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                                            REady_LED2=1 turn on ready 2 led indication

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            disp2=0

                                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                            if(jltk)

                                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                            elseREady_LED2=0

                                                                            START_LED2=1

                                                                            else START_LED2=0

                                                                            REady_LED2=0 k2=1 buzzer=0

                                                                            flag2=0flag7=0flag8=0

                                                                            j=0jj=0

                                                                            condition for switch 3

                                                                            if(flag3==1) check swich3 pressed

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            if(disp3==1 )

                                                                            REady_LED3=1 disp3=0

                                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                            if(lltk)

                                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                            elseREady_LED3=0

                                                                            START_LED3=1

                                                                            else START_LED3=0

                                                                            LED2=0 k3=1 buzzer=0

                                                                            REady_LED3=0 flag3=0

                                                                            flag9=0flag10=0

                                                                            l=0ll=0

                                                                            condition for switch 4

                                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            REady_LED4=1 disp4=0

                                                                            if(flag11==1) check coin is pressed

                                                                            if(flag12==1) START is pressed

                                                                            if(mltk)

                                                                            if(mgt1000)

                                                                            buzzer=1 if(mm==20)

                                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                            elseREady_LED4=0

                                                                            START_LED4=1

                                                                            else START_LED4=0

                                                                            buzzer=0 k4=1

                                                                            REady_LED4=0 flag4=0

                                                                            flag11=0flag12=0

                                                                            m=0mm=0

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            while(1)

                                                                            end of main programme

                                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                            whenever specific time the interrupt will generate control will go in following function

                                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if(sw1_op==0 ) ready switch flag for system1

                                                                            my_delay(10) CALL DELAY FUNCTION

                                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                            if(flag7==1) SET THE FLAG

                                                                            flag7=1

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                            flag9=1

                                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                            flag11=1

                                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if(sw2_op==0 ) fready switch flag for system2

                                                                            my_delay (10)

                                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                            if(flag5==1)

                                                                            flag5=1

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                            flag9=1

                                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                            flag11=1

                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                            if(flag7==1)

                                                                            flag7=1

                                                                            else

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                            flag5=1

                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                            flag11=1

                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                            if(flag7==1)

                                                                            flag7=1

                                                                            elseflag7=0

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                            flag5=1

                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                            flag9=1

                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                            if(flag6==1)

                                                                            i++ if (igt1000) ii++

                                                                            if (flag8==1)

                                                                            j++ if(jgt1000) jj++

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            if (flag10==1)

                                                                            l++ if (lgt1000) ll++

                                                                            if (flag12==1)

                                                                            m++ if (mgt1000) mm++

                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 13

                                                                            TROUBLE SHOOT

                                                                            Troubleshoot

                                                                            131 TROUBLE SHOOT

                                                                            A newly assembled circuit does not work may be due to -

                                                                            Faulty components

                                                                            Improper soldering

                                                                            Wrong connections

                                                                            Also any stop in working after some period may be due to -

                                                                            Component failure

                                                                            Supply failure

                                                                            Damaging of PCB

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                            proper soldering

                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                            Resistance measurement is also done which is known as Dry test

                                                                            During this project work some green LEDs was not glow then we checked it

                                                                            continuity and replace it

                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                            during soldering PCB We solved that problem

                                                                            CHAPTER 14

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            ADVANTAGES OF

                                                                            THE PROJECT

                                                                            Advantages

                                                                            141 ADVANTAGES OF THE PROJECT

                                                                            Simple and hand efficient Microcontroller based system

                                                                            Fast charging capacity

                                                                            Simple to operate

                                                                            Ease of mobility

                                                                            Facilitates connectivity for 90 of cellular phones

                                                                            Less expensive

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Reduced man power

                                                                            Low power consumption

                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                            CHAPTER 15

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            DISADVANTAGES

                                                                            OF THE PROJECT

                                                                            Disadvantages

                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                            It requires mains supply to work project

                                                                            Due to limited charging channels till now there may be a possibility that

                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                            min

                                                                            It does not have battery backup therefore it cannot be portable

                                                                            CHAPTER 16

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            APPLICATIONS OF

                                                                            THE PROJECT

                                                                            Application

                                                                            161 APPLICATIONS OF THE PROJECT

                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                            charge for the mobile phone in any places

                                                                            It is used for emergency charging purposes

                                                                            It can be installed in malls railway stations bus stops and other public

                                                                            places

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                            any location where there is a high footfall creating a large number of

                                                                            potential users

                                                                            It can be installed in offices and collages for pay charging facility

                                                                            CHAPTER 17

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            FUTURE

                                                                            DEVELOPMENT OF

                                                                            THE PROJECT

                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                            This project is very useful to people who are using mobile phone without charging

                                                                            condition in public places

                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                            It will provide battery backup for make it portable

                                                                            It will also provide SMS system in future

                                                                            We can also increase the charging time by editing software of the project

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 18

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            COST ANALYSIS

                                                                            OF THE PROJECT

                                                                            COST ANALYSIS OF THE PROJECT

                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                            1811 Component list for power supply card

                                                                            Footprint Quantity Designators Rate

                                                                            Resistor

                                                                            22K 1 R2 1

                                                                            1K 1 R1 1

                                                                            Capacitor

                                                                            1000uf25V 1 C5 10

                                                                            2200uf25V 1 C1 10

                                                                            022uf 2 C6 C2 1

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                            Table 1811 Component list for power supply card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            01uf 2 C4 C3 1

                                                                            IC

                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                            L7812CV (TO-220) 1 U2 8

                                                                            L7805CV (TO-220) 1 U1 8

                                                                            Connector

                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                            CON PHO 3PIN 1 J1 12

                                                                            LED3mm red 2 L1 L2 15

                                                                            Heat sink (TO-220) 2 16

                                                                            Total 955

                                                                            1812 Component list for battery charger card

                                                                            Footprint Quantity Rate

                                                                            Capacitor

                                                                            2200uf25V 1 1000

                                                                            022uf 4 100

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            01uf 4 100

                                                                            IC

                                                                            BRIDGE W10 1 500

                                                                            L7805CV (TO-220) 4 3200

                                                                            Connector

                                                                            CON PHO 2PIN 1 800

                                                                            Relimate 2 pin 1 400

                                                                            relimate 3 pin 4 2000

                                                                            Heat sink (TO-220) 4 1200

                                                                            TOTAL 9300

                                                                            1813 Component list for Relay card

                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                            Table 1812Component list for battery charger card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                            Total 18900

                                                                            1814Component list for controller card

                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                            Table 1813Component list for relay card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                            total 27000

                                                                            1815 Miscellaneous material

                                                                            Material Quantity Rate

                                                                            electronic item

                                                                            Transformer

                                                                            TXR1 0-9-15 1 20000

                                                                            0-9 1A

                                                                            0-15 100mA

                                                                            TXR2 0-9 1 16500

                                                                            0-9 1A

                                                                            Proximity switch 1 20000

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                            Table 1814Component list for microcontroller card

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Red push bottom 4 4000

                                                                            Green push button 1 1000

                                                                            Red led 5mm 4 800

                                                                            Green led 5mm 4 800

                                                                            Led holder 8 1600

                                                                            Copper clad 2 4000

                                                                            3 core cable 1 meter 1500

                                                                            3 pin plug 1 3000

                                                                            2 pin relimate wire 19 9000

                                                                            3 pin relimate wire 5 3750

                                                                            4 pin relimate wire 2 2000

                                                                            mechanical items

                                                                            Enclosure 1 25000

                                                                            Acrylic sheet 2 X 1 30000

                                                                            12mm cable gland 1 1000

                                                                            Screw 3mm 33 2000

                                                                            Screw 35mm 6 2400

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            10 mm spacers 100 1500

                                                                            10mm insert to stud 50 10000

                                                                            cable tie 2500

                                                                            Total 162350

                                                                            CHAPTER 19

                                                                            APPENDIX

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                            Table 1815Component list for miscellaneous material

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            APPENDIX

                                                                            191 APPENDIX

                                                                            1911 78xx IC datasheet

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1912 W10 datasheet

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1913 4n33 IC datasheet

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                            1914 MAX 232

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1915 ULN2003a IC datasheet

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            1916 89V51RD2 IC datasheet

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 20

                                                                            CONCLUSION

                                                                            CONCLUSION

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            201 CONCLUSION

                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                            installed in any business premises

                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                            a high footfall creating a large number of potential users

                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                            extend low mobile phone talk time provide battery charging

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 21

                                                                            IMAGES OF THE

                                                                            PROJECT

                                                                            Images of the project

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            211 IMAGES OF THE PROJECT

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Fig 216 Relay driver circuit

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                            Fig 213 Constant voltage battery charger circuit

                                                                            Fig214 Power supply circuit

                                                                            Fig215 Metal detector proximity switch

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Fig217 Microcontroller circuit

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            CHAPTER 22

                                                                            BIBILOGRAPHY

                                                                            BIBLIOGRAPHY

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                            221 BIBLIOGRAPHY

                                                                            BOOKS

                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                            INTERNET LINKS

                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                            • CHAPTER 1

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              ldquoMother Boardrdquo into which smaller board are plugged by specially designed connectors

                                                                              which ensures adequate and permanent low resistance coupling

                                                                              811 BOARD DESIGN

                                                                              PCB designed is the most important and requires great care during work In this case

                                                                              great care must be taken while tracing the circuit or layout on the board Because once PCB

                                                                              is designed it is virtually impossible to alter it While designing a circuit designer should

                                                                              take care to avoid crossing of conducting path (tracks) as possible Crossover are

                                                                              unavoidable then only of the jumper can be used A circuit board carrying on both sides can

                                                                              also help to solve this problem when circuit is complicated

                                                                              812 THE MASTER DIAGRAM

                                                                              The next stage lies in proportion to designing ie to prepare lsquoMaster Diagram ldquo

                                                                              which is commonly made twice as the finished circuit since this makes the working on that

                                                                              much easier especially when circuit is complicated photography eventually reduces the

                                                                              size of diagram to that of the circuit before proceeding we must know some rules regarding

                                                                              the designing -

                                                                              a The space between the conductors must be strictly controlled to avoid the possibility

                                                                              of electrical discharges or unwanted capacitance The amount by which the mater

                                                                              diagram is to reduce in size is thus a critical deign feature

                                                                              b The conductor must be wider in those part of the circuits that are going to handle

                                                                              large current must be handle without undue temperature of conductors

                                                                              c The minimum width of copper should not generally be less than about 15mmThis

                                                                              is related to mechanical strength rather than electrical properties and it also ensure

                                                                              that strips remains securely bounded to the base material

                                                                              d The points where the component holes for component lead wire occurs must be sited

                                                                              to suit the dimensions of the component and dimensions between lead-out wire so

                                                                              that the components can be situated correctly on finished board The conductor is

                                                                              also main large at the point of holes

                                                                              813 PCB MAKING

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 39

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              When the mater diagram probable twice the size of real PCB has been evolved the

                                                                              test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                              board to create a circuit as depicted by master diagram It must be stressed that very

                                                                              accurate checking master is essential at this stage Then the master point is mounted on a

                                                                              special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                              illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                              developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                              brought into operation This comprises the camera body mounted so that sideways after

                                                                              each exposure In this way number of copies of the original master diagram is set out

                                                                              exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                              In case of simple and need of number of less PCB economic and advisable to use the

                                                                              following lab method of PCB making

                                                                              Planning The Circuit

                                                                              It is not a particular difficult There are several important factors that need not be

                                                                              taken into account if the finished device is to work properly we must consider gain factor

                                                                              and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                              possibility We must also ensure that conductors and components carrying high frequency

                                                                              current are well separated from the part of the circuit We are also to make sure that all

                                                                              components need to return to earth are properly connected and that possibility of common

                                                                              impedance arising earth returned

                                                                              Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                              with nature of design Other factors that have to successfully studied include availability of

                                                                              adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                              made for mechanical fixing ventilation effect of vibration

                                                                              Cleaning The Board

                                                                              The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                              transferred to it This is important because even slightest trace of graze (from figure of

                                                                              instance) will impure the etching process and when the circuit plan has been neatly

                                                                              transferred to copper in this manner the board is held under running tap and the allowed to

                                                                              dry before resist is applied

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Transforming the Plan

                                                                              Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                              A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                              board and working plan and carefully trace the lines of original plan with a ball pen

                                                                              Resist

                                                                              Resist is nothing more than a substrate that is unaffected by presence etching

                                                                              chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                              clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                              covered when resists the leaguer type of paints possess good resist properties but

                                                                              disadvantage of relatively long time taken for drying It is essential to resist through

                                                                              hardening before etching is started Nail polished are better as they quickly and are less

                                                                              difficult to remove

                                                                              To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                              PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                              short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                              in different sizes

                                                                              Correcting Error

                                                                              When a result has been thoroughly hardened any errors that have been made can

                                                                              usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                              edges of copper conductors on board the resist must be applied with steady band

                                                                              Etching

                                                                              Next comes etching of unwanted copper amp whether a small single is all that is

                                                                              required as quantity of board to be produce certain precautions must be taken before

                                                                              operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                              quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                              etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                              grams of water

                                                                              Agitation

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                              the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                              laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                              gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                              temperature and thickness of copper foil

                                                                              Finishing Off

                                                                              When all unwanted copper is dissolved from areas between conductor board should

                                                                              be taken from an etchant amp washed in water The resist must be removed using proper

                                                                              solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                              seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                              PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                              This process is called Tinning This process of coating involve track with soldier

                                                                              Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                              ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                              Assembling On PCB

                                                                              After the holes are drilled the component have to be assembled on PCB before

                                                                              assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                              accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                              repetitive use cleans soldering iron

                                                                              CHAPTER 9

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              SOLDERING

                                                                              TECHNIQUE

                                                                              Technique for good soldering

                                                                              91 SOLDERING TECHNIQUE

                                                                              For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                              oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                              Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                              applied should be such that when solder wire is touched to joint it must melt

                                                                              quickly

                                                                              The joint and the soldering iron is held such that molten solder should flow

                                                                              smoothly over the joint

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              When joint is completely covered with molten solder the soldering iron is re-

                                                                              moved

                                                                              The joint is allowed to cool without any movement

                                                                              The bright shining solder indicates good soldering

                                                                              In case of dry solder joint a air gap remains in between the solder material and

                                                                              the joint It means that soldering is improper This is removed and again solder-

                                                                              ing is done

                                                                              Thus this way all the components are soldered on P C B

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 10

                                                                              PCB LAYOUTS

                                                                              Schematic diagram

                                                                              Bottom and top layout

                                                                              101 POWER SUPPLY CARD

                                                                              1011 SCHIMETIC DIAGRAM

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1012 LEGEND MARKING

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                              Fig1011 Schematic diagram of power supply card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1013TOP LAYER

                                                                              1014 BOTTOM LAYER

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                              Fig1013 Top layer of power supply

                                                                              card

                                                                              Fig1014 Schematic diagram of power supply card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              102 BATTERY CHARGER CARD

                                                                              1021 SCHEMATIC DIAGRAM

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                              Fig1021 Schematic diagram of battery charger card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              103 RELAY CARD

                                                                              1031 SCHIMETIC DIAGRAM

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                              Fig1031 Schematic diagram of Relay card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1032 RELAY CARD LEGEND MARKING

                                                                              1033 TOP LAYER

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                              Fig1032 Legend marking of Relay card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1034 BOTTOM LAYER

                                                                              104 MICROCONTROLER CARD

                                                                              1041 SCHIMETIC DIAGRAM

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                              Fig1034 Bottom layer of Relay card

                                                                              Fig1041 Schematic diagram of microcontroller card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1042 ALL LAYERS

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                              Fig1042 All layer of microcontroller card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 11

                                                                              INTRODUCTION

                                                                              OF SOFTWARE

                                                                              Keil (microVision 2)

                                                                              Eagle (Easily Applicable Graphical Layout Editor)

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              111 Keil (microVision 2)

                                                                              1111 Introduction to C51 Cross Compiler

                                                                              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                              generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                              generates object code that matches the efficiency and speed of assembly programming

                                                                              Using a high-level language like C has many advantages over assembly language

                                                                              programming

                                                                              Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                              the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                              Details like register allocation and addressing of the various memory types and data

                                                                              types is managed by the compiler

                                                                              Programs get a formal structure (which is imposed by the C programming language) and

                                                                              can be divided into separate functions This contributes to source code reusability as

                                                                              well as better overall application structure

                                                                              The ability to combine variable selection with specific operations improves program

                                                                              readability

                                                                              Keywords and operational functions that more nearly resemble the human thought

                                                                              process may be used

                                                                              Programming and program test time is drastically reduced

                                                                              The C run-time library contains many standard routines such as formatted output

                                                                              numeric conversions and floating-point arithmetic

                                                                              Existing program parts can be more easily included into new programs because of

                                                                              modular program construction techniques

                                                                              The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                              wide popular support and is easily obtained for most systems Existing program

                                                                              investments can be quickly adapted to other processors as needed

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1112 Software Development Cycle in Keil

                                                                              When we use the Keil Software tools the

                                                                              project development cycle is roughly the same as

                                                                              it is for any other software development project

                                                                              1 Create a project select the target chip from the

                                                                              device database and configure the tool settings

                                                                              2 Create source files in C or assembly

                                                                              3 Build your application with the project

                                                                              manager

                                                                              4 Correct errors in source files

                                                                              5 Test the linked application A block diagram of

                                                                              the complete 8051 tool set may best illustrate the

                                                                              development cycle

                                                                              112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                              1121 Schematic Editor

                                                                              In this one can develop amp design circuits for the required PCB

                                                                              1122 Layout Editor

                                                                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                              Fig 111 Software development in KEIL

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1123 Library Editor

                                                                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                              1124 Auto Router

                                                                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                              the PCB tracks designed

                                                                              1125 Cam Processor

                                                                              This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                              Bottom Layer Component Layer Masking Layer etc

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                              Start

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 12

                                                                              INTRODUCTION

                                                                              OF

                                                                              PROGRAMMING

                                                                              Flowchart of programming

                                                                              Program code

                                                                              121 Flowchart

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                              2

                                                                              flag9==1

                                                                              flag9=1

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                              flag11==1

                                                                              flag11=1 flag11=0 flag4=0

                                                                              REady_LED4=0

                                                                              Sw2_op (P01) ==0

                                                                              My delay (10)

                                                                              3 3

                                                                              flag2=1 disp2=1 k2=0

                                                                              3

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                              4

                                                                              flag11==1

                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                              flag11=1

                                                                              My delay (10)

                                                                              flag3=1 disp3=1 k3=0

                                                                              k1==0||k2==0||k4==0

                                                                              Sw3_op (P02) ==0

                                                                              5

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                              flag5==1

                                                                              5

                                                                              flag11==1

                                                                              flag7=1

                                                                              flag7==1

                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                              6

                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                              flag11=1

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                              6

                                                                              My delay (10)

                                                                              flag4=1 disp4=1 k4=0

                                                                              k1==0||k2==0||k3==0 flag5==1

                                                                              7

                                                                              Sw4_op (P03) ==0

                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                              7

                                                                              flag7==1

                                                                              flag9==1

                                                                              flag7=1

                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                              flag9=0 flag3=0 REady_LED3=0

                                                                              flag9=1

                                                                              Sw5_op A(P04) ==0

                                                                              My delay (10)

                                                                              8

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                              9

                                                                              flag2==1

                                                                              flag3==1

                                                                              8

                                                                              flag1==1

                                                                              flag4==1 flag5=1 disp5=1

                                                                              flag9=1 disp5=1

                                                                              flag7=1 disp5=1

                                                                              flag11=1 disp5=1

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                              Sw6_op (P05) ==0

                                                                              My delay (10)

                                                                              flag2==1 ampamp flag7==1

                                                                              flag3==1 ampamp flag9==1 9

                                                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                              flag8=1 disp6=1

                                                                              10

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                              10

                                                                              flag4==1 ampamp flag11==1

                                                                              flag10=1 disp6=1

                                                                              flag12=1 disp6=1

                                                                              flag8==1

                                                                              flag10==1

                                                                              11

                                                                              flag6==1

                                                                              i++

                                                                              l++

                                                                              j++

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                              flag12==1

                                                                              M++

                                                                              11

                                                                              Stop

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              122 Program

                                                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                              define buzzerP2_0 buzzer indication

                                                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                              sbit sw5_op=P0^4 input switch5 for coin

                                                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                              output Led for indication

                                                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                              function prototype declaration

                                                                              void my_delay(unsigned int value) DELAY FUCTION

                                                                              void init_timer() timer 0 initialization function

                                                                              variable declaration

                                                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              start of main programme

                                                                              void main()

                                                                              init_timer() call it timer initialization function

                                                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                              start of while loop

                                                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                              condition for switch1

                                                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                              if(iltk) loop will repeat for desired time of charging

                                                                              if(igt=1000)

                                                                              buzzer=1 turn on buzzer if (ii==20)

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              REady_LED1=1 turn on ready indication of led1

                                                                              else if(ii==40)

                                                                              REady_LED1=0ii=0

                                                                              elseREady_LED1=0

                                                                              START_LED1=1

                                                                              else

                                                                              START_LED1=0

                                                                              k1=1 buzzer=0

                                                                              REady_LED1=0 flag1=0

                                                                              flag5=0flag6=0

                                                                              condition for switch2

                                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                                              REady_LED2=1 turn on ready 2 led indication

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              disp2=0

                                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                              if(jltk)

                                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                              elseREady_LED2=0

                                                                              START_LED2=1

                                                                              else START_LED2=0

                                                                              REady_LED2=0 k2=1 buzzer=0

                                                                              flag2=0flag7=0flag8=0

                                                                              j=0jj=0

                                                                              condition for switch 3

                                                                              if(flag3==1) check swich3 pressed

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              if(disp3==1 )

                                                                              REady_LED3=1 disp3=0

                                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                              if(lltk)

                                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                              elseREady_LED3=0

                                                                              START_LED3=1

                                                                              else START_LED3=0

                                                                              LED2=0 k3=1 buzzer=0

                                                                              REady_LED3=0 flag3=0

                                                                              flag9=0flag10=0

                                                                              l=0ll=0

                                                                              condition for switch 4

                                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              REady_LED4=1 disp4=0

                                                                              if(flag11==1) check coin is pressed

                                                                              if(flag12==1) START is pressed

                                                                              if(mltk)

                                                                              if(mgt1000)

                                                                              buzzer=1 if(mm==20)

                                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                              elseREady_LED4=0

                                                                              START_LED4=1

                                                                              else START_LED4=0

                                                                              buzzer=0 k4=1

                                                                              REady_LED4=0 flag4=0

                                                                              flag11=0flag12=0

                                                                              m=0mm=0

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              while(1)

                                                                              end of main programme

                                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                              whenever specific time the interrupt will generate control will go in following function

                                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if(sw1_op==0 ) ready switch flag for system1

                                                                              my_delay(10) CALL DELAY FUNCTION

                                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                              if(flag7==1) SET THE FLAG

                                                                              flag7=1

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                              flag9=1

                                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                              flag11=1

                                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if(sw2_op==0 ) fready switch flag for system2

                                                                              my_delay (10)

                                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                              if(flag5==1)

                                                                              flag5=1

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                              flag9=1

                                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                              flag11=1

                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                              if(flag7==1)

                                                                              flag7=1

                                                                              else

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                              flag5=1

                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                              flag11=1

                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                              if(flag7==1)

                                                                              flag7=1

                                                                              elseflag7=0

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                              flag5=1

                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                              flag9=1

                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                              if(flag6==1)

                                                                              i++ if (igt1000) ii++

                                                                              if (flag8==1)

                                                                              j++ if(jgt1000) jj++

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              if (flag10==1)

                                                                              l++ if (lgt1000) ll++

                                                                              if (flag12==1)

                                                                              m++ if (mgt1000) mm++

                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 13

                                                                              TROUBLE SHOOT

                                                                              Troubleshoot

                                                                              131 TROUBLE SHOOT

                                                                              A newly assembled circuit does not work may be due to -

                                                                              Faulty components

                                                                              Improper soldering

                                                                              Wrong connections

                                                                              Also any stop in working after some period may be due to -

                                                                              Component failure

                                                                              Supply failure

                                                                              Damaging of PCB

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                              proper soldering

                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                              Resistance measurement is also done which is known as Dry test

                                                                              During this project work some green LEDs was not glow then we checked it

                                                                              continuity and replace it

                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                              during soldering PCB We solved that problem

                                                                              CHAPTER 14

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              ADVANTAGES OF

                                                                              THE PROJECT

                                                                              Advantages

                                                                              141 ADVANTAGES OF THE PROJECT

                                                                              Simple and hand efficient Microcontroller based system

                                                                              Fast charging capacity

                                                                              Simple to operate

                                                                              Ease of mobility

                                                                              Facilitates connectivity for 90 of cellular phones

                                                                              Less expensive

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Reduced man power

                                                                              Low power consumption

                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                              CHAPTER 15

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              DISADVANTAGES

                                                                              OF THE PROJECT

                                                                              Disadvantages

                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                              It requires mains supply to work project

                                                                              Due to limited charging channels till now there may be a possibility that

                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                              min

                                                                              It does not have battery backup therefore it cannot be portable

                                                                              CHAPTER 16

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              APPLICATIONS OF

                                                                              THE PROJECT

                                                                              Application

                                                                              161 APPLICATIONS OF THE PROJECT

                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                              charge for the mobile phone in any places

                                                                              It is used for emergency charging purposes

                                                                              It can be installed in malls railway stations bus stops and other public

                                                                              places

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                              any location where there is a high footfall creating a large number of

                                                                              potential users

                                                                              It can be installed in offices and collages for pay charging facility

                                                                              CHAPTER 17

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              FUTURE

                                                                              DEVELOPMENT OF

                                                                              THE PROJECT

                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                              This project is very useful to people who are using mobile phone without charging

                                                                              condition in public places

                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                              It will provide battery backup for make it portable

                                                                              It will also provide SMS system in future

                                                                              We can also increase the charging time by editing software of the project

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 18

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              COST ANALYSIS

                                                                              OF THE PROJECT

                                                                              COST ANALYSIS OF THE PROJECT

                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                              1811 Component list for power supply card

                                                                              Footprint Quantity Designators Rate

                                                                              Resistor

                                                                              22K 1 R2 1

                                                                              1K 1 R1 1

                                                                              Capacitor

                                                                              1000uf25V 1 C5 10

                                                                              2200uf25V 1 C1 10

                                                                              022uf 2 C6 C2 1

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                              Table 1811 Component list for power supply card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              01uf 2 C4 C3 1

                                                                              IC

                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                              L7812CV (TO-220) 1 U2 8

                                                                              L7805CV (TO-220) 1 U1 8

                                                                              Connector

                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                              CON PHO 3PIN 1 J1 12

                                                                              LED3mm red 2 L1 L2 15

                                                                              Heat sink (TO-220) 2 16

                                                                              Total 955

                                                                              1812 Component list for battery charger card

                                                                              Footprint Quantity Rate

                                                                              Capacitor

                                                                              2200uf25V 1 1000

                                                                              022uf 4 100

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              01uf 4 100

                                                                              IC

                                                                              BRIDGE W10 1 500

                                                                              L7805CV (TO-220) 4 3200

                                                                              Connector

                                                                              CON PHO 2PIN 1 800

                                                                              Relimate 2 pin 1 400

                                                                              relimate 3 pin 4 2000

                                                                              Heat sink (TO-220) 4 1200

                                                                              TOTAL 9300

                                                                              1813 Component list for Relay card

                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                              Table 1812Component list for battery charger card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                              Total 18900

                                                                              1814Component list for controller card

                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                              Table 1813Component list for relay card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                              total 27000

                                                                              1815 Miscellaneous material

                                                                              Material Quantity Rate

                                                                              electronic item

                                                                              Transformer

                                                                              TXR1 0-9-15 1 20000

                                                                              0-9 1A

                                                                              0-15 100mA

                                                                              TXR2 0-9 1 16500

                                                                              0-9 1A

                                                                              Proximity switch 1 20000

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                              Table 1814Component list for microcontroller card

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Red push bottom 4 4000

                                                                              Green push button 1 1000

                                                                              Red led 5mm 4 800

                                                                              Green led 5mm 4 800

                                                                              Led holder 8 1600

                                                                              Copper clad 2 4000

                                                                              3 core cable 1 meter 1500

                                                                              3 pin plug 1 3000

                                                                              2 pin relimate wire 19 9000

                                                                              3 pin relimate wire 5 3750

                                                                              4 pin relimate wire 2 2000

                                                                              mechanical items

                                                                              Enclosure 1 25000

                                                                              Acrylic sheet 2 X 1 30000

                                                                              12mm cable gland 1 1000

                                                                              Screw 3mm 33 2000

                                                                              Screw 35mm 6 2400

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              10 mm spacers 100 1500

                                                                              10mm insert to stud 50 10000

                                                                              cable tie 2500

                                                                              Total 162350

                                                                              CHAPTER 19

                                                                              APPENDIX

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                              Table 1815Component list for miscellaneous material

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              APPENDIX

                                                                              191 APPENDIX

                                                                              1911 78xx IC datasheet

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1912 W10 datasheet

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1913 4n33 IC datasheet

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                              1914 MAX 232

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1915 ULN2003a IC datasheet

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              1916 89V51RD2 IC datasheet

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 20

                                                                              CONCLUSION

                                                                              CONCLUSION

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              201 CONCLUSION

                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                              installed in any business premises

                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                              a high footfall creating a large number of potential users

                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                              extend low mobile phone talk time provide battery charging

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 21

                                                                              IMAGES OF THE

                                                                              PROJECT

                                                                              Images of the project

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              211 IMAGES OF THE PROJECT

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Fig 216 Relay driver circuit

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                              Fig 213 Constant voltage battery charger circuit

                                                                              Fig214 Power supply circuit

                                                                              Fig215 Metal detector proximity switch

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Fig217 Microcontroller circuit

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              CHAPTER 22

                                                                              BIBILOGRAPHY

                                                                              BIBLIOGRAPHY

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                              221 BIBLIOGRAPHY

                                                                              BOOKS

                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                              INTERNET LINKS

                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                              • CHAPTER 1

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                When the mater diagram probable twice the size of real PCB has been evolved the

                                                                                test major step consists of etching or dissolving the unwanted metal from copper claded

                                                                                board to create a circuit as depicted by master diagram It must be stressed that very

                                                                                accurate checking master is essential at this stage Then the master point is mounted on a

                                                                                special frame on easy facing of a larger camera and with the aid of the very powerful

                                                                                illumination a master diagram is clearly photographed on a glass sensitive plate This is

                                                                                developed to give photographic negative Next is called ldquostep and repeat camerardquo It is

                                                                                brought into operation This comprises the camera body mounted so that sideways after

                                                                                each exposure In this way number of copies of the original master diagram is set out

                                                                                exactly to cover standard sheet of copper clad laminate laboratory method of making PCB

                                                                                In case of simple and need of number of less PCB economic and advisable to use the

                                                                                following lab method of PCB making

                                                                                Planning The Circuit

                                                                                It is not a particular difficult There are several important factors that need not be

                                                                                taken into account if the finished device is to work properly we must consider gain factor

                                                                                and ensure that the input and output parts are sufficiently well isolated to avoid the

                                                                                possibility We must also ensure that conductors and components carrying high frequency

                                                                                current are well separated from the part of the circuit We are also to make sure that all

                                                                                components need to return to earth are properly connected and that possibility of common

                                                                                impedance arising earth returned

                                                                                Circuit is totally eliminated by making all earth as substantial possible consistent

                                                                                with nature of design Other factors that have to successfully studied include availability of

                                                                                adequate return points on board and itrsquos mounting from accessibility of switch connection

                                                                                made for mechanical fixing ventilation effect of vibration

                                                                                Cleaning The Board

                                                                                The copper side of the board must be thoroughly cleaned before circuit plan is

                                                                                transferred to it This is important because even slightest trace of graze (from figure of

                                                                                instance) will impure the etching process and when the circuit plan has been neatly

                                                                                transferred to copper in this manner the board is held under running tap and the allowed to

                                                                                dry before resist is applied

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 40

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Transforming the Plan

                                                                                Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                                A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                                board and working plan and carefully trace the lines of original plan with a ball pen

                                                                                Resist

                                                                                Resist is nothing more than a substrate that is unaffected by presence etching

                                                                                chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                                clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                                covered when resists the leaguer type of paints possess good resist properties but

                                                                                disadvantage of relatively long time taken for drying It is essential to resist through

                                                                                hardening before etching is started Nail polished are better as they quickly and are less

                                                                                difficult to remove

                                                                                To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                                PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                                short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                                in different sizes

                                                                                Correcting Error

                                                                                When a result has been thoroughly hardened any errors that have been made can

                                                                                usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                                edges of copper conductors on board the resist must be applied with steady band

                                                                                Etching

                                                                                Next comes etching of unwanted copper amp whether a small single is all that is

                                                                                required as quantity of board to be produce certain precautions must be taken before

                                                                                operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                                quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                                etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                                grams of water

                                                                                Agitation

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                                the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                                laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                                gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                                temperature and thickness of copper foil

                                                                                Finishing Off

                                                                                When all unwanted copper is dissolved from areas between conductor board should

                                                                                be taken from an etchant amp washed in water The resist must be removed using proper

                                                                                solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                                seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                                PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                                This process is called Tinning This process of coating involve track with soldier

                                                                                Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                                ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                                Assembling On PCB

                                                                                After the holes are drilled the component have to be assembled on PCB before

                                                                                assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                                accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                                repetitive use cleans soldering iron

                                                                                CHAPTER 9

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                SOLDERING

                                                                                TECHNIQUE

                                                                                Technique for good soldering

                                                                                91 SOLDERING TECHNIQUE

                                                                                For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                                oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                                Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                                applied should be such that when solder wire is touched to joint it must melt

                                                                                quickly

                                                                                The joint and the soldering iron is held such that molten solder should flow

                                                                                smoothly over the joint

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                When joint is completely covered with molten solder the soldering iron is re-

                                                                                moved

                                                                                The joint is allowed to cool without any movement

                                                                                The bright shining solder indicates good soldering

                                                                                In case of dry solder joint a air gap remains in between the solder material and

                                                                                the joint It means that soldering is improper This is removed and again solder-

                                                                                ing is done

                                                                                Thus this way all the components are soldered on P C B

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 10

                                                                                PCB LAYOUTS

                                                                                Schematic diagram

                                                                                Bottom and top layout

                                                                                101 POWER SUPPLY CARD

                                                                                1011 SCHIMETIC DIAGRAM

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1012 LEGEND MARKING

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                Fig1011 Schematic diagram of power supply card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1013TOP LAYER

                                                                                1014 BOTTOM LAYER

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                Fig1013 Top layer of power supply

                                                                                card

                                                                                Fig1014 Schematic diagram of power supply card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                102 BATTERY CHARGER CARD

                                                                                1021 SCHEMATIC DIAGRAM

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                Fig1021 Schematic diagram of battery charger card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                103 RELAY CARD

                                                                                1031 SCHIMETIC DIAGRAM

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                Fig1031 Schematic diagram of Relay card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1032 RELAY CARD LEGEND MARKING

                                                                                1033 TOP LAYER

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                Fig1032 Legend marking of Relay card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1034 BOTTOM LAYER

                                                                                104 MICROCONTROLER CARD

                                                                                1041 SCHIMETIC DIAGRAM

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                Fig1034 Bottom layer of Relay card

                                                                                Fig1041 Schematic diagram of microcontroller card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1042 ALL LAYERS

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                Fig1042 All layer of microcontroller card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 11

                                                                                INTRODUCTION

                                                                                OF SOFTWARE

                                                                                Keil (microVision 2)

                                                                                Eagle (Easily Applicable Graphical Layout Editor)

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                111 Keil (microVision 2)

                                                                                1111 Introduction to C51 Cross Compiler

                                                                                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                generates object code that matches the efficiency and speed of assembly programming

                                                                                Using a high-level language like C has many advantages over assembly language

                                                                                programming

                                                                                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                Details like register allocation and addressing of the various memory types and data

                                                                                types is managed by the compiler

                                                                                Programs get a formal structure (which is imposed by the C programming language) and

                                                                                can be divided into separate functions This contributes to source code reusability as

                                                                                well as better overall application structure

                                                                                The ability to combine variable selection with specific operations improves program

                                                                                readability

                                                                                Keywords and operational functions that more nearly resemble the human thought

                                                                                process may be used

                                                                                Programming and program test time is drastically reduced

                                                                                The C run-time library contains many standard routines such as formatted output

                                                                                numeric conversions and floating-point arithmetic

                                                                                Existing program parts can be more easily included into new programs because of

                                                                                modular program construction techniques

                                                                                The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                wide popular support and is easily obtained for most systems Existing program

                                                                                investments can be quickly adapted to other processors as needed

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1112 Software Development Cycle in Keil

                                                                                When we use the Keil Software tools the

                                                                                project development cycle is roughly the same as

                                                                                it is for any other software development project

                                                                                1 Create a project select the target chip from the

                                                                                device database and configure the tool settings

                                                                                2 Create source files in C or assembly

                                                                                3 Build your application with the project

                                                                                manager

                                                                                4 Correct errors in source files

                                                                                5 Test the linked application A block diagram of

                                                                                the complete 8051 tool set may best illustrate the

                                                                                development cycle

                                                                                112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                1121 Schematic Editor

                                                                                In this one can develop amp design circuits for the required PCB

                                                                                1122 Layout Editor

                                                                                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                Fig 111 Software development in KEIL

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1123 Library Editor

                                                                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                1124 Auto Router

                                                                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                the PCB tracks designed

                                                                                1125 Cam Processor

                                                                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                Bottom Layer Component Layer Masking Layer etc

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                Start

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 12

                                                                                INTRODUCTION

                                                                                OF

                                                                                PROGRAMMING

                                                                                Flowchart of programming

                                                                                Program code

                                                                                121 Flowchart

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                2

                                                                                flag9==1

                                                                                flag9=1

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                flag11==1

                                                                                flag11=1 flag11=0 flag4=0

                                                                                REady_LED4=0

                                                                                Sw2_op (P01) ==0

                                                                                My delay (10)

                                                                                3 3

                                                                                flag2=1 disp2=1 k2=0

                                                                                3

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                4

                                                                                flag11==1

                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                flag11=1

                                                                                My delay (10)

                                                                                flag3=1 disp3=1 k3=0

                                                                                k1==0||k2==0||k4==0

                                                                                Sw3_op (P02) ==0

                                                                                5

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                flag5==1

                                                                                5

                                                                                flag11==1

                                                                                flag7=1

                                                                                flag7==1

                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                6

                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                flag11=1

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                6

                                                                                My delay (10)

                                                                                flag4=1 disp4=1 k4=0

                                                                                k1==0||k2==0||k3==0 flag5==1

                                                                                7

                                                                                Sw4_op (P03) ==0

                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                7

                                                                                flag7==1

                                                                                flag9==1

                                                                                flag7=1

                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                flag9=0 flag3=0 REady_LED3=0

                                                                                flag9=1

                                                                                Sw5_op A(P04) ==0

                                                                                My delay (10)

                                                                                8

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                9

                                                                                flag2==1

                                                                                flag3==1

                                                                                8

                                                                                flag1==1

                                                                                flag4==1 flag5=1 disp5=1

                                                                                flag9=1 disp5=1

                                                                                flag7=1 disp5=1

                                                                                flag11=1 disp5=1

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                Sw6_op (P05) ==0

                                                                                My delay (10)

                                                                                flag2==1 ampamp flag7==1

                                                                                flag3==1 ampamp flag9==1 9

                                                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                flag8=1 disp6=1

                                                                                10

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                10

                                                                                flag4==1 ampamp flag11==1

                                                                                flag10=1 disp6=1

                                                                                flag12=1 disp6=1

                                                                                flag8==1

                                                                                flag10==1

                                                                                11

                                                                                flag6==1

                                                                                i++

                                                                                l++

                                                                                j++

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                flag12==1

                                                                                M++

                                                                                11

                                                                                Stop

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                122 Program

                                                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                define buzzerP2_0 buzzer indication

                                                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                sbit sw5_op=P0^4 input switch5 for coin

                                                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                output Led for indication

                                                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                function prototype declaration

                                                                                void my_delay(unsigned int value) DELAY FUCTION

                                                                                void init_timer() timer 0 initialization function

                                                                                variable declaration

                                                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                start of main programme

                                                                                void main()

                                                                                init_timer() call it timer initialization function

                                                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                start of while loop

                                                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                condition for switch1

                                                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                if(iltk) loop will repeat for desired time of charging

                                                                                if(igt=1000)

                                                                                buzzer=1 turn on buzzer if (ii==20)

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                REady_LED1=1 turn on ready indication of led1

                                                                                else if(ii==40)

                                                                                REady_LED1=0ii=0

                                                                                elseREady_LED1=0

                                                                                START_LED1=1

                                                                                else

                                                                                START_LED1=0

                                                                                k1=1 buzzer=0

                                                                                REady_LED1=0 flag1=0

                                                                                flag5=0flag6=0

                                                                                condition for switch2

                                                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                REady_LED2=1 turn on ready 2 led indication

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                disp2=0

                                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                if(jltk)

                                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                elseREady_LED2=0

                                                                                START_LED2=1

                                                                                else START_LED2=0

                                                                                REady_LED2=0 k2=1 buzzer=0

                                                                                flag2=0flag7=0flag8=0

                                                                                j=0jj=0

                                                                                condition for switch 3

                                                                                if(flag3==1) check swich3 pressed

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                if(disp3==1 )

                                                                                REady_LED3=1 disp3=0

                                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                if(lltk)

                                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                elseREady_LED3=0

                                                                                START_LED3=1

                                                                                else START_LED3=0

                                                                                LED2=0 k3=1 buzzer=0

                                                                                REady_LED3=0 flag3=0

                                                                                flag9=0flag10=0

                                                                                l=0ll=0

                                                                                condition for switch 4

                                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                REady_LED4=1 disp4=0

                                                                                if(flag11==1) check coin is pressed

                                                                                if(flag12==1) START is pressed

                                                                                if(mltk)

                                                                                if(mgt1000)

                                                                                buzzer=1 if(mm==20)

                                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                elseREady_LED4=0

                                                                                START_LED4=1

                                                                                else START_LED4=0

                                                                                buzzer=0 k4=1

                                                                                REady_LED4=0 flag4=0

                                                                                flag11=0flag12=0

                                                                                m=0mm=0

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                while(1)

                                                                                end of main programme

                                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                whenever specific time the interrupt will generate control will go in following function

                                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                                my_delay(10) CALL DELAY FUNCTION

                                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                if(flag7==1) SET THE FLAG

                                                                                flag7=1

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                flag9=1

                                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                flag11=1

                                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                                my_delay (10)

                                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                if(flag5==1)

                                                                                flag5=1

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                flag9=1

                                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                flag11=1

                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                if(flag7==1)

                                                                                flag7=1

                                                                                else

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                flag5=1

                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                flag11=1

                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                if(flag7==1)

                                                                                flag7=1

                                                                                elseflag7=0

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                                flag5=1

                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                flag9=1

                                                                                elseflag9=0flag3=0REady_LED3=0

                                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                if(flag6==1)

                                                                                i++ if (igt1000) ii++

                                                                                if (flag8==1)

                                                                                j++ if(jgt1000) jj++

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                if (flag10==1)

                                                                                l++ if (lgt1000) ll++

                                                                                if (flag12==1)

                                                                                m++ if (mgt1000) mm++

                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 13

                                                                                TROUBLE SHOOT

                                                                                Troubleshoot

                                                                                131 TROUBLE SHOOT

                                                                                A newly assembled circuit does not work may be due to -

                                                                                Faulty components

                                                                                Improper soldering

                                                                                Wrong connections

                                                                                Also any stop in working after some period may be due to -

                                                                                Component failure

                                                                                Supply failure

                                                                                Damaging of PCB

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                proper soldering

                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                Resistance measurement is also done which is known as Dry test

                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                continuity and replace it

                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                during soldering PCB We solved that problem

                                                                                CHAPTER 14

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                ADVANTAGES OF

                                                                                THE PROJECT

                                                                                Advantages

                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                Simple and hand efficient Microcontroller based system

                                                                                Fast charging capacity

                                                                                Simple to operate

                                                                                Ease of mobility

                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                Less expensive

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Reduced man power

                                                                                Low power consumption

                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                CHAPTER 15

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                DISADVANTAGES

                                                                                OF THE PROJECT

                                                                                Disadvantages

                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                It requires mains supply to work project

                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                min

                                                                                It does not have battery backup therefore it cannot be portable

                                                                                CHAPTER 16

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                APPLICATIONS OF

                                                                                THE PROJECT

                                                                                Application

                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                charge for the mobile phone in any places

                                                                                It is used for emergency charging purposes

                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                places

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                any location where there is a high footfall creating a large number of

                                                                                potential users

                                                                                It can be installed in offices and collages for pay charging facility

                                                                                CHAPTER 17

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                FUTURE

                                                                                DEVELOPMENT OF

                                                                                THE PROJECT

                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                condition in public places

                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                It will provide battery backup for make it portable

                                                                                It will also provide SMS system in future

                                                                                We can also increase the charging time by editing software of the project

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 18

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                COST ANALYSIS

                                                                                OF THE PROJECT

                                                                                COST ANALYSIS OF THE PROJECT

                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                1811 Component list for power supply card

                                                                                Footprint Quantity Designators Rate

                                                                                Resistor

                                                                                22K 1 R2 1

                                                                                1K 1 R1 1

                                                                                Capacitor

                                                                                1000uf25V 1 C5 10

                                                                                2200uf25V 1 C1 10

                                                                                022uf 2 C6 C2 1

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                Table 1811 Component list for power supply card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                01uf 2 C4 C3 1

                                                                                IC

                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                L7812CV (TO-220) 1 U2 8

                                                                                L7805CV (TO-220) 1 U1 8

                                                                                Connector

                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                CON PHO 3PIN 1 J1 12

                                                                                LED3mm red 2 L1 L2 15

                                                                                Heat sink (TO-220) 2 16

                                                                                Total 955

                                                                                1812 Component list for battery charger card

                                                                                Footprint Quantity Rate

                                                                                Capacitor

                                                                                2200uf25V 1 1000

                                                                                022uf 4 100

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                01uf 4 100

                                                                                IC

                                                                                BRIDGE W10 1 500

                                                                                L7805CV (TO-220) 4 3200

                                                                                Connector

                                                                                CON PHO 2PIN 1 800

                                                                                Relimate 2 pin 1 400

                                                                                relimate 3 pin 4 2000

                                                                                Heat sink (TO-220) 4 1200

                                                                                TOTAL 9300

                                                                                1813 Component list for Relay card

                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                Table 1812Component list for battery charger card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                Total 18900

                                                                                1814Component list for controller card

                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                Table 1813Component list for relay card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                total 27000

                                                                                1815 Miscellaneous material

                                                                                Material Quantity Rate

                                                                                electronic item

                                                                                Transformer

                                                                                TXR1 0-9-15 1 20000

                                                                                0-9 1A

                                                                                0-15 100mA

                                                                                TXR2 0-9 1 16500

                                                                                0-9 1A

                                                                                Proximity switch 1 20000

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                Table 1814Component list for microcontroller card

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Red push bottom 4 4000

                                                                                Green push button 1 1000

                                                                                Red led 5mm 4 800

                                                                                Green led 5mm 4 800

                                                                                Led holder 8 1600

                                                                                Copper clad 2 4000

                                                                                3 core cable 1 meter 1500

                                                                                3 pin plug 1 3000

                                                                                2 pin relimate wire 19 9000

                                                                                3 pin relimate wire 5 3750

                                                                                4 pin relimate wire 2 2000

                                                                                mechanical items

                                                                                Enclosure 1 25000

                                                                                Acrylic sheet 2 X 1 30000

                                                                                12mm cable gland 1 1000

                                                                                Screw 3mm 33 2000

                                                                                Screw 35mm 6 2400

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                10 mm spacers 100 1500

                                                                                10mm insert to stud 50 10000

                                                                                cable tie 2500

                                                                                Total 162350

                                                                                CHAPTER 19

                                                                                APPENDIX

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                Table 1815Component list for miscellaneous material

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                APPENDIX

                                                                                191 APPENDIX

                                                                                1911 78xx IC datasheet

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1912 W10 datasheet

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                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1913 4n33 IC datasheet

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                1914 MAX 232

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1915 ULN2003a IC datasheet

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                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                1916 89V51RD2 IC datasheet

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 20

                                                                                CONCLUSION

                                                                                CONCLUSION

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                201 CONCLUSION

                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                installed in any business premises

                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                a high footfall creating a large number of potential users

                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                extend low mobile phone talk time provide battery charging

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 21

                                                                                IMAGES OF THE

                                                                                PROJECT

                                                                                Images of the project

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                211 IMAGES OF THE PROJECT

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Fig 216 Relay driver circuit

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                Fig214 Power supply circuit

                                                                                Fig215 Metal detector proximity switch

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Fig217 Microcontroller circuit

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                CHAPTER 22

                                                                                BIBILOGRAPHY

                                                                                BIBLIOGRAPHY

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                221 BIBLIOGRAPHY

                                                                                BOOKS

                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                INTERNET LINKS

                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                • CHAPTER 1

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Transforming the Plan

                                                                                  Now once cleaning is done plan has to transfer on copper surface of PCB material

                                                                                  A convenient way to do this is simply put the carbon paper between a copper surface of the

                                                                                  board and working plan and carefully trace the lines of original plan with a ball pen

                                                                                  Resist

                                                                                  Resist is nothing more than a substrate that is unaffected by presence etching

                                                                                  chemicals It is usually colored so that it can be easily seen the copper surface when plan is

                                                                                  clearly worked on clean copper that are to be left in fact as the copper conductor must be

                                                                                  covered when resists the leaguer type of paints possess good resist properties but

                                                                                  disadvantage of relatively long time taken for drying It is essential to resist through

                                                                                  hardening before etching is started Nail polished are better as they quickly and are less

                                                                                  difficult to remove

                                                                                  To overcome this drying effect and to achieve the sharp edge of the trace on the

                                                                                  PCB Now-a-days etching taps along with IC pads are commonly used To this chances of

                                                                                  short circulating due to paints are completely the avoid etching tapes and pads are available

                                                                                  in different sizes

                                                                                  Correcting Error

                                                                                  When a result has been thoroughly hardened any errors that have been made can

                                                                                  usually be corrected by gently scratching away with knife To ensure clear out lines round

                                                                                  edges of copper conductors on board the resist must be applied with steady band

                                                                                  Etching

                                                                                  Next comes etching of unwanted copper amp whether a small single is all that is

                                                                                  required as quantity of board to be produce certain precautions must be taken before

                                                                                  operation is commenced the most used etch amp I ferrite chloride to this is added small

                                                                                  quantity of HCL to accelerate But not critical as lab construction concerned A good

                                                                                  etchant can be produced by mixing 10grams of ferric chloride amp 25 grams of HCL with 15

                                                                                  grams of water

                                                                                  Agitation

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 41

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                                  the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                                  laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                                  gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                                  temperature and thickness of copper foil

                                                                                  Finishing Off

                                                                                  When all unwanted copper is dissolved from areas between conductor board should

                                                                                  be taken from an etchant amp washed in water The resist must be removed using proper

                                                                                  solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                                  seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                                  PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                                  This process is called Tinning This process of coating involve track with soldier

                                                                                  Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                                  ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                                  Assembling On PCB

                                                                                  After the holes are drilled the component have to be assembled on PCB before

                                                                                  assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                                  accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                                  repetitive use cleans soldering iron

                                                                                  CHAPTER 9

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  SOLDERING

                                                                                  TECHNIQUE

                                                                                  Technique for good soldering

                                                                                  91 SOLDERING TECHNIQUE

                                                                                  For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                                  oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                                  Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                                  applied should be such that when solder wire is touched to joint it must melt

                                                                                  quickly

                                                                                  The joint and the soldering iron is held such that molten solder should flow

                                                                                  smoothly over the joint

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  When joint is completely covered with molten solder the soldering iron is re-

                                                                                  moved

                                                                                  The joint is allowed to cool without any movement

                                                                                  The bright shining solder indicates good soldering

                                                                                  In case of dry solder joint a air gap remains in between the solder material and

                                                                                  the joint It means that soldering is improper This is removed and again solder-

                                                                                  ing is done

                                                                                  Thus this way all the components are soldered on P C B

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 10

                                                                                  PCB LAYOUTS

                                                                                  Schematic diagram

                                                                                  Bottom and top layout

                                                                                  101 POWER SUPPLY CARD

                                                                                  1011 SCHIMETIC DIAGRAM

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1012 LEGEND MARKING

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                  Fig1011 Schematic diagram of power supply card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1013TOP LAYER

                                                                                  1014 BOTTOM LAYER

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                  Fig1013 Top layer of power supply

                                                                                  card

                                                                                  Fig1014 Schematic diagram of power supply card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  102 BATTERY CHARGER CARD

                                                                                  1021 SCHEMATIC DIAGRAM

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                  Fig1021 Schematic diagram of battery charger card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  103 RELAY CARD

                                                                                  1031 SCHIMETIC DIAGRAM

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                  Fig1031 Schematic diagram of Relay card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1032 RELAY CARD LEGEND MARKING

                                                                                  1033 TOP LAYER

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                  Fig1032 Legend marking of Relay card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1034 BOTTOM LAYER

                                                                                  104 MICROCONTROLER CARD

                                                                                  1041 SCHIMETIC DIAGRAM

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                  Fig1034 Bottom layer of Relay card

                                                                                  Fig1041 Schematic diagram of microcontroller card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1042 ALL LAYERS

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                  Fig1042 All layer of microcontroller card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 11

                                                                                  INTRODUCTION

                                                                                  OF SOFTWARE

                                                                                  Keil (microVision 2)

                                                                                  Eagle (Easily Applicable Graphical Layout Editor)

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  111 Keil (microVision 2)

                                                                                  1111 Introduction to C51 Cross Compiler

                                                                                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                  generates object code that matches the efficiency and speed of assembly programming

                                                                                  Using a high-level language like C has many advantages over assembly language

                                                                                  programming

                                                                                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                  the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                  Details like register allocation and addressing of the various memory types and data

                                                                                  types is managed by the compiler

                                                                                  Programs get a formal structure (which is imposed by the C programming language) and

                                                                                  can be divided into separate functions This contributes to source code reusability as

                                                                                  well as better overall application structure

                                                                                  The ability to combine variable selection with specific operations improves program

                                                                                  readability

                                                                                  Keywords and operational functions that more nearly resemble the human thought

                                                                                  process may be used

                                                                                  Programming and program test time is drastically reduced

                                                                                  The C run-time library contains many standard routines such as formatted output

                                                                                  numeric conversions and floating-point arithmetic

                                                                                  Existing program parts can be more easily included into new programs because of

                                                                                  modular program construction techniques

                                                                                  The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                  wide popular support and is easily obtained for most systems Existing program

                                                                                  investments can be quickly adapted to other processors as needed

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1112 Software Development Cycle in Keil

                                                                                  When we use the Keil Software tools the

                                                                                  project development cycle is roughly the same as

                                                                                  it is for any other software development project

                                                                                  1 Create a project select the target chip from the

                                                                                  device database and configure the tool settings

                                                                                  2 Create source files in C or assembly

                                                                                  3 Build your application with the project

                                                                                  manager

                                                                                  4 Correct errors in source files

                                                                                  5 Test the linked application A block diagram of

                                                                                  the complete 8051 tool set may best illustrate the

                                                                                  development cycle

                                                                                  112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                  1121 Schematic Editor

                                                                                  In this one can develop amp design circuits for the required PCB

                                                                                  1122 Layout Editor

                                                                                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                  Fig 111 Software development in KEIL

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1123 Library Editor

                                                                                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                  1124 Auto Router

                                                                                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                  the PCB tracks designed

                                                                                  1125 Cam Processor

                                                                                  This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                  Bottom Layer Component Layer Masking Layer etc

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                  Start

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 12

                                                                                  INTRODUCTION

                                                                                  OF

                                                                                  PROGRAMMING

                                                                                  Flowchart of programming

                                                                                  Program code

                                                                                  121 Flowchart

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                  2

                                                                                  flag9==1

                                                                                  flag9=1

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                  flag11==1

                                                                                  flag11=1 flag11=0 flag4=0

                                                                                  REady_LED4=0

                                                                                  Sw2_op (P01) ==0

                                                                                  My delay (10)

                                                                                  3 3

                                                                                  flag2=1 disp2=1 k2=0

                                                                                  3

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                  4

                                                                                  flag11==1

                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                  flag11=1

                                                                                  My delay (10)

                                                                                  flag3=1 disp3=1 k3=0

                                                                                  k1==0||k2==0||k4==0

                                                                                  Sw3_op (P02) ==0

                                                                                  5

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                  flag5==1

                                                                                  5

                                                                                  flag11==1

                                                                                  flag7=1

                                                                                  flag7==1

                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                  6

                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                  flag11=1

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                  6

                                                                                  My delay (10)

                                                                                  flag4=1 disp4=1 k4=0

                                                                                  k1==0||k2==0||k3==0 flag5==1

                                                                                  7

                                                                                  Sw4_op (P03) ==0

                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                  7

                                                                                  flag7==1

                                                                                  flag9==1

                                                                                  flag7=1

                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                  flag9=0 flag3=0 REady_LED3=0

                                                                                  flag9=1

                                                                                  Sw5_op A(P04) ==0

                                                                                  My delay (10)

                                                                                  8

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                  9

                                                                                  flag2==1

                                                                                  flag3==1

                                                                                  8

                                                                                  flag1==1

                                                                                  flag4==1 flag5=1 disp5=1

                                                                                  flag9=1 disp5=1

                                                                                  flag7=1 disp5=1

                                                                                  flag11=1 disp5=1

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                  Sw6_op (P05) ==0

                                                                                  My delay (10)

                                                                                  flag2==1 ampamp flag7==1

                                                                                  flag3==1 ampamp flag9==1 9

                                                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                  flag8=1 disp6=1

                                                                                  10

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                  10

                                                                                  flag4==1 ampamp flag11==1

                                                                                  flag10=1 disp6=1

                                                                                  flag12=1 disp6=1

                                                                                  flag8==1

                                                                                  flag10==1

                                                                                  11

                                                                                  flag6==1

                                                                                  i++

                                                                                  l++

                                                                                  j++

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                  flag12==1

                                                                                  M++

                                                                                  11

                                                                                  Stop

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  122 Program

                                                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                  define buzzerP2_0 buzzer indication

                                                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                  output Led for indication

                                                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                  function prototype declaration

                                                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                                                  void init_timer() timer 0 initialization function

                                                                                  variable declaration

                                                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  start of main programme

                                                                                  void main()

                                                                                  init_timer() call it timer initialization function

                                                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                  start of while loop

                                                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                  condition for switch1

                                                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                  if(iltk) loop will repeat for desired time of charging

                                                                                  if(igt=1000)

                                                                                  buzzer=1 turn on buzzer if (ii==20)

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  REady_LED1=1 turn on ready indication of led1

                                                                                  else if(ii==40)

                                                                                  REady_LED1=0ii=0

                                                                                  elseREady_LED1=0

                                                                                  START_LED1=1

                                                                                  else

                                                                                  START_LED1=0

                                                                                  k1=1 buzzer=0

                                                                                  REady_LED1=0 flag1=0

                                                                                  flag5=0flag6=0

                                                                                  condition for switch2

                                                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                  REady_LED2=1 turn on ready 2 led indication

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  disp2=0

                                                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                  if(jltk)

                                                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                  elseREady_LED2=0

                                                                                  START_LED2=1

                                                                                  else START_LED2=0

                                                                                  REady_LED2=0 k2=1 buzzer=0

                                                                                  flag2=0flag7=0flag8=0

                                                                                  j=0jj=0

                                                                                  condition for switch 3

                                                                                  if(flag3==1) check swich3 pressed

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  if(disp3==1 )

                                                                                  REady_LED3=1 disp3=0

                                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                  if(lltk)

                                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                  elseREady_LED3=0

                                                                                  START_LED3=1

                                                                                  else START_LED3=0

                                                                                  LED2=0 k3=1 buzzer=0

                                                                                  REady_LED3=0 flag3=0

                                                                                  flag9=0flag10=0

                                                                                  l=0ll=0

                                                                                  condition for switch 4

                                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  REady_LED4=1 disp4=0

                                                                                  if(flag11==1) check coin is pressed

                                                                                  if(flag12==1) START is pressed

                                                                                  if(mltk)

                                                                                  if(mgt1000)

                                                                                  buzzer=1 if(mm==20)

                                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                  elseREady_LED4=0

                                                                                  START_LED4=1

                                                                                  else START_LED4=0

                                                                                  buzzer=0 k4=1

                                                                                  REady_LED4=0 flag4=0

                                                                                  flag11=0flag12=0

                                                                                  m=0mm=0

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  while(1)

                                                                                  end of main programme

                                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                  if(flag7==1) SET THE FLAG

                                                                                  flag7=1

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                  flag9=1

                                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                  flag11=1

                                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                                  my_delay (10)

                                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                  if(flag5==1)

                                                                                  flag5=1

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                  flag9=1

                                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                  flag11=1

                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                  if(flag7==1)

                                                                                  flag7=1

                                                                                  else

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                  flag5=1

                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                  flag11=1

                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                  if(flag7==1)

                                                                                  flag7=1

                                                                                  elseflag7=0

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                                  flag5=1

                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                  flag9=1

                                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                  if(flag6==1)

                                                                                  i++ if (igt1000) ii++

                                                                                  if (flag8==1)

                                                                                  j++ if(jgt1000) jj++

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  if (flag10==1)

                                                                                  l++ if (lgt1000) ll++

                                                                                  if (flag12==1)

                                                                                  m++ if (mgt1000) mm++

                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 13

                                                                                  TROUBLE SHOOT

                                                                                  Troubleshoot

                                                                                  131 TROUBLE SHOOT

                                                                                  A newly assembled circuit does not work may be due to -

                                                                                  Faulty components

                                                                                  Improper soldering

                                                                                  Wrong connections

                                                                                  Also any stop in working after some period may be due to -

                                                                                  Component failure

                                                                                  Supply failure

                                                                                  Damaging of PCB

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                  proper soldering

                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                  continuity and replace it

                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                  during soldering PCB We solved that problem

                                                                                  CHAPTER 14

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  ADVANTAGES OF

                                                                                  THE PROJECT

                                                                                  Advantages

                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                  Simple and hand efficient Microcontroller based system

                                                                                  Fast charging capacity

                                                                                  Simple to operate

                                                                                  Ease of mobility

                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                  Less expensive

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Reduced man power

                                                                                  Low power consumption

                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                  CHAPTER 15

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  DISADVANTAGES

                                                                                  OF THE PROJECT

                                                                                  Disadvantages

                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                  It requires mains supply to work project

                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                  min

                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                  CHAPTER 16

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  APPLICATIONS OF

                                                                                  THE PROJECT

                                                                                  Application

                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                  charge for the mobile phone in any places

                                                                                  It is used for emergency charging purposes

                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                  places

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                  any location where there is a high footfall creating a large number of

                                                                                  potential users

                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                  CHAPTER 17

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  FUTURE

                                                                                  DEVELOPMENT OF

                                                                                  THE PROJECT

                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                  condition in public places

                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                  It will provide battery backup for make it portable

                                                                                  It will also provide SMS system in future

                                                                                  We can also increase the charging time by editing software of the project

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 18

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  COST ANALYSIS

                                                                                  OF THE PROJECT

                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                  1811 Component list for power supply card

                                                                                  Footprint Quantity Designators Rate

                                                                                  Resistor

                                                                                  22K 1 R2 1

                                                                                  1K 1 R1 1

                                                                                  Capacitor

                                                                                  1000uf25V 1 C5 10

                                                                                  2200uf25V 1 C1 10

                                                                                  022uf 2 C6 C2 1

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                  Table 1811 Component list for power supply card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  01uf 2 C4 C3 1

                                                                                  IC

                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                  Connector

                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                  CON PHO 3PIN 1 J1 12

                                                                                  LED3mm red 2 L1 L2 15

                                                                                  Heat sink (TO-220) 2 16

                                                                                  Total 955

                                                                                  1812 Component list for battery charger card

                                                                                  Footprint Quantity Rate

                                                                                  Capacitor

                                                                                  2200uf25V 1 1000

                                                                                  022uf 4 100

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  01uf 4 100

                                                                                  IC

                                                                                  BRIDGE W10 1 500

                                                                                  L7805CV (TO-220) 4 3200

                                                                                  Connector

                                                                                  CON PHO 2PIN 1 800

                                                                                  Relimate 2 pin 1 400

                                                                                  relimate 3 pin 4 2000

                                                                                  Heat sink (TO-220) 4 1200

                                                                                  TOTAL 9300

                                                                                  1813 Component list for Relay card

                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                  Table 1812Component list for battery charger card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                  Total 18900

                                                                                  1814Component list for controller card

                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                  Table 1813Component list for relay card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                  total 27000

                                                                                  1815 Miscellaneous material

                                                                                  Material Quantity Rate

                                                                                  electronic item

                                                                                  Transformer

                                                                                  TXR1 0-9-15 1 20000

                                                                                  0-9 1A

                                                                                  0-15 100mA

                                                                                  TXR2 0-9 1 16500

                                                                                  0-9 1A

                                                                                  Proximity switch 1 20000

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                  Table 1814Component list for microcontroller card

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Red push bottom 4 4000

                                                                                  Green push button 1 1000

                                                                                  Red led 5mm 4 800

                                                                                  Green led 5mm 4 800

                                                                                  Led holder 8 1600

                                                                                  Copper clad 2 4000

                                                                                  3 core cable 1 meter 1500

                                                                                  3 pin plug 1 3000

                                                                                  2 pin relimate wire 19 9000

                                                                                  3 pin relimate wire 5 3750

                                                                                  4 pin relimate wire 2 2000

                                                                                  mechanical items

                                                                                  Enclosure 1 25000

                                                                                  Acrylic sheet 2 X 1 30000

                                                                                  12mm cable gland 1 1000

                                                                                  Screw 3mm 33 2000

                                                                                  Screw 35mm 6 2400

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  10 mm spacers 100 1500

                                                                                  10mm insert to stud 50 10000

                                                                                  cable tie 2500

                                                                                  Total 162350

                                                                                  CHAPTER 19

                                                                                  APPENDIX

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                  Table 1815Component list for miscellaneous material

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  APPENDIX

                                                                                  191 APPENDIX

                                                                                  1911 78xx IC datasheet

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1912 W10 datasheet

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1913 4n33 IC datasheet

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                  1914 MAX 232

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1915 ULN2003a IC datasheet

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  1916 89V51RD2 IC datasheet

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 20

                                                                                  CONCLUSION

                                                                                  CONCLUSION

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  201 CONCLUSION

                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                  installed in any business premises

                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                  a high footfall creating a large number of potential users

                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                  extend low mobile phone talk time provide battery charging

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 21

                                                                                  IMAGES OF THE

                                                                                  PROJECT

                                                                                  Images of the project

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  211 IMAGES OF THE PROJECT

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Fig 216 Relay driver circuit

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                  Fig214 Power supply circuit

                                                                                  Fig215 Metal detector proximity switch

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Fig217 Microcontroller circuit

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  CHAPTER 22

                                                                                  BIBILOGRAPHY

                                                                                  BIBLIOGRAPHY

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                  221 BIBLIOGRAPHY

                                                                                  BOOKS

                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                  INTERNET LINKS

                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                  • CHAPTER 1

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Small plastic bath is ideal for storing the etchant process Depth of liquid for storing

                                                                                    the etchant process The depth of liquid must be sufficient to completely cover laminate the

                                                                                    laminated board carrying the resist patterns circuit is then cropped into etchant bath amp the

                                                                                    gentle agitation takes 5 to 20 minutes to complete depending on the strength of the enchant

                                                                                    temperature and thickness of copper foil

                                                                                    Finishing Off

                                                                                    When all unwanted copper is dissolved from areas between conductor board should

                                                                                    be taken from an etchant amp washed in water The resist must be removed using proper

                                                                                    solvent After this the copper surface must be polished with any kind of cleaner It should be

                                                                                    seen that there is no slight incomplete etching between the conducting parts of the PCB The

                                                                                    PCBrsquos are coated coating material for protection in lab coating material itself it a soldier

                                                                                    This process is called Tinning This process of coating involve track with soldier

                                                                                    Advantage of tinning the effect of environment of conductors then PCB is drilled

                                                                                    ie holes for filling amp mounting the component on PCB are drilled with suitable drill bit

                                                                                    Assembling On PCB

                                                                                    After the holes are drilled the component have to be assembled on PCB before

                                                                                    assembling the components it is necessary to clean soldering iron in order to get easy amp

                                                                                    accurate soldering Removing impurity particles that are gathered on iron bit due to

                                                                                    repetitive use cleans soldering iron

                                                                                    CHAPTER 9

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 42

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    SOLDERING

                                                                                    TECHNIQUE

                                                                                    Technique for good soldering

                                                                                    91 SOLDERING TECHNIQUE

                                                                                    For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                                    oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                                    Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                                    applied should be such that when solder wire is touched to joint it must melt

                                                                                    quickly

                                                                                    The joint and the soldering iron is held such that molten solder should flow

                                                                                    smoothly over the joint

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    When joint is completely covered with molten solder the soldering iron is re-

                                                                                    moved

                                                                                    The joint is allowed to cool without any movement

                                                                                    The bright shining solder indicates good soldering

                                                                                    In case of dry solder joint a air gap remains in between the solder material and

                                                                                    the joint It means that soldering is improper This is removed and again solder-

                                                                                    ing is done

                                                                                    Thus this way all the components are soldered on P C B

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 10

                                                                                    PCB LAYOUTS

                                                                                    Schematic diagram

                                                                                    Bottom and top layout

                                                                                    101 POWER SUPPLY CARD

                                                                                    1011 SCHIMETIC DIAGRAM

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1012 LEGEND MARKING

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                    Fig1011 Schematic diagram of power supply card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1013TOP LAYER

                                                                                    1014 BOTTOM LAYER

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                    Fig1013 Top layer of power supply

                                                                                    card

                                                                                    Fig1014 Schematic diagram of power supply card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    102 BATTERY CHARGER CARD

                                                                                    1021 SCHEMATIC DIAGRAM

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                    Fig1021 Schematic diagram of battery charger card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    103 RELAY CARD

                                                                                    1031 SCHIMETIC DIAGRAM

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                    Fig1031 Schematic diagram of Relay card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1032 RELAY CARD LEGEND MARKING

                                                                                    1033 TOP LAYER

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                    Fig1032 Legend marking of Relay card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1034 BOTTOM LAYER

                                                                                    104 MICROCONTROLER CARD

                                                                                    1041 SCHIMETIC DIAGRAM

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                    Fig1034 Bottom layer of Relay card

                                                                                    Fig1041 Schematic diagram of microcontroller card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1042 ALL LAYERS

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                    Fig1042 All layer of microcontroller card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 11

                                                                                    INTRODUCTION

                                                                                    OF SOFTWARE

                                                                                    Keil (microVision 2)

                                                                                    Eagle (Easily Applicable Graphical Layout Editor)

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    111 Keil (microVision 2)

                                                                                    1111 Introduction to C51 Cross Compiler

                                                                                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                    generates object code that matches the efficiency and speed of assembly programming

                                                                                    Using a high-level language like C has many advantages over assembly language

                                                                                    programming

                                                                                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                    the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                    Details like register allocation and addressing of the various memory types and data

                                                                                    types is managed by the compiler

                                                                                    Programs get a formal structure (which is imposed by the C programming language) and

                                                                                    can be divided into separate functions This contributes to source code reusability as

                                                                                    well as better overall application structure

                                                                                    The ability to combine variable selection with specific operations improves program

                                                                                    readability

                                                                                    Keywords and operational functions that more nearly resemble the human thought

                                                                                    process may be used

                                                                                    Programming and program test time is drastically reduced

                                                                                    The C run-time library contains many standard routines such as formatted output

                                                                                    numeric conversions and floating-point arithmetic

                                                                                    Existing program parts can be more easily included into new programs because of

                                                                                    modular program construction techniques

                                                                                    The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                    wide popular support and is easily obtained for most systems Existing program

                                                                                    investments can be quickly adapted to other processors as needed

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1112 Software Development Cycle in Keil

                                                                                    When we use the Keil Software tools the

                                                                                    project development cycle is roughly the same as

                                                                                    it is for any other software development project

                                                                                    1 Create a project select the target chip from the

                                                                                    device database and configure the tool settings

                                                                                    2 Create source files in C or assembly

                                                                                    3 Build your application with the project

                                                                                    manager

                                                                                    4 Correct errors in source files

                                                                                    5 Test the linked application A block diagram of

                                                                                    the complete 8051 tool set may best illustrate the

                                                                                    development cycle

                                                                                    112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                    1121 Schematic Editor

                                                                                    In this one can develop amp design circuits for the required PCB

                                                                                    1122 Layout Editor

                                                                                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                    Fig 111 Software development in KEIL

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1123 Library Editor

                                                                                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                    1124 Auto Router

                                                                                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                    the PCB tracks designed

                                                                                    1125 Cam Processor

                                                                                    This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                    Bottom Layer Component Layer Masking Layer etc

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                    Start

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 12

                                                                                    INTRODUCTION

                                                                                    OF

                                                                                    PROGRAMMING

                                                                                    Flowchart of programming

                                                                                    Program code

                                                                                    121 Flowchart

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                    2

                                                                                    flag9==1

                                                                                    flag9=1

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                    flag11==1

                                                                                    flag11=1 flag11=0 flag4=0

                                                                                    REady_LED4=0

                                                                                    Sw2_op (P01) ==0

                                                                                    My delay (10)

                                                                                    3 3

                                                                                    flag2=1 disp2=1 k2=0

                                                                                    3

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                    4

                                                                                    flag11==1

                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                    flag11=1

                                                                                    My delay (10)

                                                                                    flag3=1 disp3=1 k3=0

                                                                                    k1==0||k2==0||k4==0

                                                                                    Sw3_op (P02) ==0

                                                                                    5

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                    flag5==1

                                                                                    5

                                                                                    flag11==1

                                                                                    flag7=1

                                                                                    flag7==1

                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                    6

                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                    flag11=1

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                    6

                                                                                    My delay (10)

                                                                                    flag4=1 disp4=1 k4=0

                                                                                    k1==0||k2==0||k3==0 flag5==1

                                                                                    7

                                                                                    Sw4_op (P03) ==0

                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                    7

                                                                                    flag7==1

                                                                                    flag9==1

                                                                                    flag7=1

                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                    flag9=0 flag3=0 REady_LED3=0

                                                                                    flag9=1

                                                                                    Sw5_op A(P04) ==0

                                                                                    My delay (10)

                                                                                    8

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                    9

                                                                                    flag2==1

                                                                                    flag3==1

                                                                                    8

                                                                                    flag1==1

                                                                                    flag4==1 flag5=1 disp5=1

                                                                                    flag9=1 disp5=1

                                                                                    flag7=1 disp5=1

                                                                                    flag11=1 disp5=1

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                    Sw6_op (P05) ==0

                                                                                    My delay (10)

                                                                                    flag2==1 ampamp flag7==1

                                                                                    flag3==1 ampamp flag9==1 9

                                                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                    flag8=1 disp6=1

                                                                                    10

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                    10

                                                                                    flag4==1 ampamp flag11==1

                                                                                    flag10=1 disp6=1

                                                                                    flag12=1 disp6=1

                                                                                    flag8==1

                                                                                    flag10==1

                                                                                    11

                                                                                    flag6==1

                                                                                    i++

                                                                                    l++

                                                                                    j++

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                    flag12==1

                                                                                    M++

                                                                                    11

                                                                                    Stop

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    122 Program

                                                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                    define buzzerP2_0 buzzer indication

                                                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                    output Led for indication

                                                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                    function prototype declaration

                                                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                                                    void init_timer() timer 0 initialization function

                                                                                    variable declaration

                                                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    start of main programme

                                                                                    void main()

                                                                                    init_timer() call it timer initialization function

                                                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                    start of while loop

                                                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                    condition for switch1

                                                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                    if(iltk) loop will repeat for desired time of charging

                                                                                    if(igt=1000)

                                                                                    buzzer=1 turn on buzzer if (ii==20)

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    REady_LED1=1 turn on ready indication of led1

                                                                                    else if(ii==40)

                                                                                    REady_LED1=0ii=0

                                                                                    elseREady_LED1=0

                                                                                    START_LED1=1

                                                                                    else

                                                                                    START_LED1=0

                                                                                    k1=1 buzzer=0

                                                                                    REady_LED1=0 flag1=0

                                                                                    flag5=0flag6=0

                                                                                    condition for switch2

                                                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                    REady_LED2=1 turn on ready 2 led indication

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    disp2=0

                                                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                    if(jltk)

                                                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                    elseREady_LED2=0

                                                                                    START_LED2=1

                                                                                    else START_LED2=0

                                                                                    REady_LED2=0 k2=1 buzzer=0

                                                                                    flag2=0flag7=0flag8=0

                                                                                    j=0jj=0

                                                                                    condition for switch 3

                                                                                    if(flag3==1) check swich3 pressed

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    if(disp3==1 )

                                                                                    REady_LED3=1 disp3=0

                                                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                    if(lltk)

                                                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                    elseREady_LED3=0

                                                                                    START_LED3=1

                                                                                    else START_LED3=0

                                                                                    LED2=0 k3=1 buzzer=0

                                                                                    REady_LED3=0 flag3=0

                                                                                    flag9=0flag10=0

                                                                                    l=0ll=0

                                                                                    condition for switch 4

                                                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    REady_LED4=1 disp4=0

                                                                                    if(flag11==1) check coin is pressed

                                                                                    if(flag12==1) START is pressed

                                                                                    if(mltk)

                                                                                    if(mgt1000)

                                                                                    buzzer=1 if(mm==20)

                                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                    elseREady_LED4=0

                                                                                    START_LED4=1

                                                                                    else START_LED4=0

                                                                                    buzzer=0 k4=1

                                                                                    REady_LED4=0 flag4=0

                                                                                    flag11=0flag12=0

                                                                                    m=0mm=0

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    while(1)

                                                                                    end of main programme

                                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                    if(flag7==1) SET THE FLAG

                                                                                    flag7=1

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                    flag9=1

                                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                    flag11=1

                                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                                    my_delay (10)

                                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                    if(flag5==1)

                                                                                    flag5=1

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                    flag9=1

                                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                    flag11=1

                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                    if(flag7==1)

                                                                                    flag7=1

                                                                                    else

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                    flag5=1

                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                    flag11=1

                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                    if(flag7==1)

                                                                                    flag7=1

                                                                                    elseflag7=0

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                                    flag5=1

                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                    flag9=1

                                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                    if(flag6==1)

                                                                                    i++ if (igt1000) ii++

                                                                                    if (flag8==1)

                                                                                    j++ if(jgt1000) jj++

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    if (flag10==1)

                                                                                    l++ if (lgt1000) ll++

                                                                                    if (flag12==1)

                                                                                    m++ if (mgt1000) mm++

                                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 13

                                                                                    TROUBLE SHOOT

                                                                                    Troubleshoot

                                                                                    131 TROUBLE SHOOT

                                                                                    A newly assembled circuit does not work may be due to -

                                                                                    Faulty components

                                                                                    Improper soldering

                                                                                    Wrong connections

                                                                                    Also any stop in working after some period may be due to -

                                                                                    Component failure

                                                                                    Supply failure

                                                                                    Damaging of PCB

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                    proper soldering

                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                    continuity and replace it

                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                    during soldering PCB We solved that problem

                                                                                    CHAPTER 14

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    ADVANTAGES OF

                                                                                    THE PROJECT

                                                                                    Advantages

                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                    Simple and hand efficient Microcontroller based system

                                                                                    Fast charging capacity

                                                                                    Simple to operate

                                                                                    Ease of mobility

                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                    Less expensive

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Reduced man power

                                                                                    Low power consumption

                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                    CHAPTER 15

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    DISADVANTAGES

                                                                                    OF THE PROJECT

                                                                                    Disadvantages

                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                    It requires mains supply to work project

                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                    min

                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                    CHAPTER 16

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    APPLICATIONS OF

                                                                                    THE PROJECT

                                                                                    Application

                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                    charge for the mobile phone in any places

                                                                                    It is used for emergency charging purposes

                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                    places

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                    any location where there is a high footfall creating a large number of

                                                                                    potential users

                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                    CHAPTER 17

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    FUTURE

                                                                                    DEVELOPMENT OF

                                                                                    THE PROJECT

                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                    condition in public places

                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                    It will provide battery backup for make it portable

                                                                                    It will also provide SMS system in future

                                                                                    We can also increase the charging time by editing software of the project

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 18

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    COST ANALYSIS

                                                                                    OF THE PROJECT

                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                    1811 Component list for power supply card

                                                                                    Footprint Quantity Designators Rate

                                                                                    Resistor

                                                                                    22K 1 R2 1

                                                                                    1K 1 R1 1

                                                                                    Capacitor

                                                                                    1000uf25V 1 C5 10

                                                                                    2200uf25V 1 C1 10

                                                                                    022uf 2 C6 C2 1

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                    Table 1811 Component list for power supply card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    01uf 2 C4 C3 1

                                                                                    IC

                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                    Connector

                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                    CON PHO 3PIN 1 J1 12

                                                                                    LED3mm red 2 L1 L2 15

                                                                                    Heat sink (TO-220) 2 16

                                                                                    Total 955

                                                                                    1812 Component list for battery charger card

                                                                                    Footprint Quantity Rate

                                                                                    Capacitor

                                                                                    2200uf25V 1 1000

                                                                                    022uf 4 100

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    01uf 4 100

                                                                                    IC

                                                                                    BRIDGE W10 1 500

                                                                                    L7805CV (TO-220) 4 3200

                                                                                    Connector

                                                                                    CON PHO 2PIN 1 800

                                                                                    Relimate 2 pin 1 400

                                                                                    relimate 3 pin 4 2000

                                                                                    Heat sink (TO-220) 4 1200

                                                                                    TOTAL 9300

                                                                                    1813 Component list for Relay card

                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                    Table 1812Component list for battery charger card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                    Total 18900

                                                                                    1814Component list for controller card

                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                    Table 1813Component list for relay card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                    total 27000

                                                                                    1815 Miscellaneous material

                                                                                    Material Quantity Rate

                                                                                    electronic item

                                                                                    Transformer

                                                                                    TXR1 0-9-15 1 20000

                                                                                    0-9 1A

                                                                                    0-15 100mA

                                                                                    TXR2 0-9 1 16500

                                                                                    0-9 1A

                                                                                    Proximity switch 1 20000

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                    Table 1814Component list for microcontroller card

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Red push bottom 4 4000

                                                                                    Green push button 1 1000

                                                                                    Red led 5mm 4 800

                                                                                    Green led 5mm 4 800

                                                                                    Led holder 8 1600

                                                                                    Copper clad 2 4000

                                                                                    3 core cable 1 meter 1500

                                                                                    3 pin plug 1 3000

                                                                                    2 pin relimate wire 19 9000

                                                                                    3 pin relimate wire 5 3750

                                                                                    4 pin relimate wire 2 2000

                                                                                    mechanical items

                                                                                    Enclosure 1 25000

                                                                                    Acrylic sheet 2 X 1 30000

                                                                                    12mm cable gland 1 1000

                                                                                    Screw 3mm 33 2000

                                                                                    Screw 35mm 6 2400

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    10 mm spacers 100 1500

                                                                                    10mm insert to stud 50 10000

                                                                                    cable tie 2500

                                                                                    Total 162350

                                                                                    CHAPTER 19

                                                                                    APPENDIX

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                    Table 1815Component list for miscellaneous material

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    APPENDIX

                                                                                    191 APPENDIX

                                                                                    1911 78xx IC datasheet

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                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1912 W10 datasheet

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1913 4n33 IC datasheet

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                    1914 MAX 232

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1915 ULN2003a IC datasheet

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    1916 89V51RD2 IC datasheet

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 20

                                                                                    CONCLUSION

                                                                                    CONCLUSION

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    201 CONCLUSION

                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                    installed in any business premises

                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                    a high footfall creating a large number of potential users

                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                    extend low mobile phone talk time provide battery charging

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 21

                                                                                    IMAGES OF THE

                                                                                    PROJECT

                                                                                    Images of the project

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    211 IMAGES OF THE PROJECT

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Fig 216 Relay driver circuit

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                    Fig214 Power supply circuit

                                                                                    Fig215 Metal detector proximity switch

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Fig217 Microcontroller circuit

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    CHAPTER 22

                                                                                    BIBILOGRAPHY

                                                                                    BIBLIOGRAPHY

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                    221 BIBLIOGRAPHY

                                                                                    BOOKS

                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                    INTERNET LINKS

                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                    • CHAPTER 1

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      SOLDERING

                                                                                      TECHNIQUE

                                                                                      Technique for good soldering

                                                                                      91 SOLDERING TECHNIQUE

                                                                                      For soldering of any joints first the terminal to be soldered are cleaned to remove

                                                                                      oxide film or dirt on it If required flux is applied on the points to be soldered

                                                                                      Now the joint to be soldered is heated with the help of soldering iron Heat

                                                                                      applied should be such that when solder wire is touched to joint it must melt

                                                                                      quickly

                                                                                      The joint and the soldering iron is held such that molten solder should flow

                                                                                      smoothly over the joint

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 43

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      When joint is completely covered with molten solder the soldering iron is re-

                                                                                      moved

                                                                                      The joint is allowed to cool without any movement

                                                                                      The bright shining solder indicates good soldering

                                                                                      In case of dry solder joint a air gap remains in between the solder material and

                                                                                      the joint It means that soldering is improper This is removed and again solder-

                                                                                      ing is done

                                                                                      Thus this way all the components are soldered on P C B

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 10

                                                                                      PCB LAYOUTS

                                                                                      Schematic diagram

                                                                                      Bottom and top layout

                                                                                      101 POWER SUPPLY CARD

                                                                                      1011 SCHIMETIC DIAGRAM

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1012 LEGEND MARKING

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                      Fig1011 Schematic diagram of power supply card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1013TOP LAYER

                                                                                      1014 BOTTOM LAYER

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                      Fig1013 Top layer of power supply

                                                                                      card

                                                                                      Fig1014 Schematic diagram of power supply card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      102 BATTERY CHARGER CARD

                                                                                      1021 SCHEMATIC DIAGRAM

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                      Fig1021 Schematic diagram of battery charger card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      103 RELAY CARD

                                                                                      1031 SCHIMETIC DIAGRAM

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                      Fig1031 Schematic diagram of Relay card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1032 RELAY CARD LEGEND MARKING

                                                                                      1033 TOP LAYER

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                      Fig1032 Legend marking of Relay card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1034 BOTTOM LAYER

                                                                                      104 MICROCONTROLER CARD

                                                                                      1041 SCHIMETIC DIAGRAM

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                      Fig1034 Bottom layer of Relay card

                                                                                      Fig1041 Schematic diagram of microcontroller card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1042 ALL LAYERS

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                      Fig1042 All layer of microcontroller card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 11

                                                                                      INTRODUCTION

                                                                                      OF SOFTWARE

                                                                                      Keil (microVision 2)

                                                                                      Eagle (Easily Applicable Graphical Layout Editor)

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      111 Keil (microVision 2)

                                                                                      1111 Introduction to C51 Cross Compiler

                                                                                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                      generates object code that matches the efficiency and speed of assembly programming

                                                                                      Using a high-level language like C has many advantages over assembly language

                                                                                      programming

                                                                                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                      the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                      Details like register allocation and addressing of the various memory types and data

                                                                                      types is managed by the compiler

                                                                                      Programs get a formal structure (which is imposed by the C programming language) and

                                                                                      can be divided into separate functions This contributes to source code reusability as

                                                                                      well as better overall application structure

                                                                                      The ability to combine variable selection with specific operations improves program

                                                                                      readability

                                                                                      Keywords and operational functions that more nearly resemble the human thought

                                                                                      process may be used

                                                                                      Programming and program test time is drastically reduced

                                                                                      The C run-time library contains many standard routines such as formatted output

                                                                                      numeric conversions and floating-point arithmetic

                                                                                      Existing program parts can be more easily included into new programs because of

                                                                                      modular program construction techniques

                                                                                      The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                      wide popular support and is easily obtained for most systems Existing program

                                                                                      investments can be quickly adapted to other processors as needed

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1112 Software Development Cycle in Keil

                                                                                      When we use the Keil Software tools the

                                                                                      project development cycle is roughly the same as

                                                                                      it is for any other software development project

                                                                                      1 Create a project select the target chip from the

                                                                                      device database and configure the tool settings

                                                                                      2 Create source files in C or assembly

                                                                                      3 Build your application with the project

                                                                                      manager

                                                                                      4 Correct errors in source files

                                                                                      5 Test the linked application A block diagram of

                                                                                      the complete 8051 tool set may best illustrate the

                                                                                      development cycle

                                                                                      112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                      1121 Schematic Editor

                                                                                      In this one can develop amp design circuits for the required PCB

                                                                                      1122 Layout Editor

                                                                                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                      Fig 111 Software development in KEIL

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1123 Library Editor

                                                                                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                      1124 Auto Router

                                                                                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                      the PCB tracks designed

                                                                                      1125 Cam Processor

                                                                                      This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                      Bottom Layer Component Layer Masking Layer etc

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                      Start

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 12

                                                                                      INTRODUCTION

                                                                                      OF

                                                                                      PROGRAMMING

                                                                                      Flowchart of programming

                                                                                      Program code

                                                                                      121 Flowchart

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                      2

                                                                                      flag9==1

                                                                                      flag9=1

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                      flag11==1

                                                                                      flag11=1 flag11=0 flag4=0

                                                                                      REady_LED4=0

                                                                                      Sw2_op (P01) ==0

                                                                                      My delay (10)

                                                                                      3 3

                                                                                      flag2=1 disp2=1 k2=0

                                                                                      3

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                      4

                                                                                      flag11==1

                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                      flag11=1

                                                                                      My delay (10)

                                                                                      flag3=1 disp3=1 k3=0

                                                                                      k1==0||k2==0||k4==0

                                                                                      Sw3_op (P02) ==0

                                                                                      5

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                      flag5==1

                                                                                      5

                                                                                      flag11==1

                                                                                      flag7=1

                                                                                      flag7==1

                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                      6

                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                      flag11=1

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                      6

                                                                                      My delay (10)

                                                                                      flag4=1 disp4=1 k4=0

                                                                                      k1==0||k2==0||k3==0 flag5==1

                                                                                      7

                                                                                      Sw4_op (P03) ==0

                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                      7

                                                                                      flag7==1

                                                                                      flag9==1

                                                                                      flag7=1

                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                      flag9=0 flag3=0 REady_LED3=0

                                                                                      flag9=1

                                                                                      Sw5_op A(P04) ==0

                                                                                      My delay (10)

                                                                                      8

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                      9

                                                                                      flag2==1

                                                                                      flag3==1

                                                                                      8

                                                                                      flag1==1

                                                                                      flag4==1 flag5=1 disp5=1

                                                                                      flag9=1 disp5=1

                                                                                      flag7=1 disp5=1

                                                                                      flag11=1 disp5=1

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                      Sw6_op (P05) ==0

                                                                                      My delay (10)

                                                                                      flag2==1 ampamp flag7==1

                                                                                      flag3==1 ampamp flag9==1 9

                                                                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                      flag8=1 disp6=1

                                                                                      10

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                      10

                                                                                      flag4==1 ampamp flag11==1

                                                                                      flag10=1 disp6=1

                                                                                      flag12=1 disp6=1

                                                                                      flag8==1

                                                                                      flag10==1

                                                                                      11

                                                                                      flag6==1

                                                                                      i++

                                                                                      l++

                                                                                      j++

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                      flag12==1

                                                                                      M++

                                                                                      11

                                                                                      Stop

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      122 Program

                                                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                      define buzzerP2_0 buzzer indication

                                                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                      output Led for indication

                                                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                      function prototype declaration

                                                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                                                      void init_timer() timer 0 initialization function

                                                                                      variable declaration

                                                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      start of main programme

                                                                                      void main()

                                                                                      init_timer() call it timer initialization function

                                                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                      start of while loop

                                                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                      condition for switch1

                                                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                      if(iltk) loop will repeat for desired time of charging

                                                                                      if(igt=1000)

                                                                                      buzzer=1 turn on buzzer if (ii==20)

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      REady_LED1=1 turn on ready indication of led1

                                                                                      else if(ii==40)

                                                                                      REady_LED1=0ii=0

                                                                                      elseREady_LED1=0

                                                                                      START_LED1=1

                                                                                      else

                                                                                      START_LED1=0

                                                                                      k1=1 buzzer=0

                                                                                      REady_LED1=0 flag1=0

                                                                                      flag5=0flag6=0

                                                                                      condition for switch2

                                                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                      REady_LED2=1 turn on ready 2 led indication

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      disp2=0

                                                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                      if(jltk)

                                                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                      elseREady_LED2=0

                                                                                      START_LED2=1

                                                                                      else START_LED2=0

                                                                                      REady_LED2=0 k2=1 buzzer=0

                                                                                      flag2=0flag7=0flag8=0

                                                                                      j=0jj=0

                                                                                      condition for switch 3

                                                                                      if(flag3==1) check swich3 pressed

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      if(disp3==1 )

                                                                                      REady_LED3=1 disp3=0

                                                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                      if(lltk)

                                                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                      elseREady_LED3=0

                                                                                      START_LED3=1

                                                                                      else START_LED3=0

                                                                                      LED2=0 k3=1 buzzer=0

                                                                                      REady_LED3=0 flag3=0

                                                                                      flag9=0flag10=0

                                                                                      l=0ll=0

                                                                                      condition for switch 4

                                                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      REady_LED4=1 disp4=0

                                                                                      if(flag11==1) check coin is pressed

                                                                                      if(flag12==1) START is pressed

                                                                                      if(mltk)

                                                                                      if(mgt1000)

                                                                                      buzzer=1 if(mm==20)

                                                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                      elseREady_LED4=0

                                                                                      START_LED4=1

                                                                                      else START_LED4=0

                                                                                      buzzer=0 k4=1

                                                                                      REady_LED4=0 flag4=0

                                                                                      flag11=0flag12=0

                                                                                      m=0mm=0

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      while(1)

                                                                                      end of main programme

                                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                      if(flag7==1) SET THE FLAG

                                                                                      flag7=1

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                      flag9=1

                                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                      flag11=1

                                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                                      my_delay (10)

                                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                      if(flag5==1)

                                                                                      flag5=1

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                      flag9=1

                                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                      flag11=1

                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                      if(flag7==1)

                                                                                      flag7=1

                                                                                      else

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                      flag5=1

                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                      flag11=1

                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                      if(flag7==1)

                                                                                      flag7=1

                                                                                      elseflag7=0

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                                      flag5=1

                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                      flag9=1

                                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                      if(flag6==1)

                                                                                      i++ if (igt1000) ii++

                                                                                      if (flag8==1)

                                                                                      j++ if(jgt1000) jj++

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      if (flag10==1)

                                                                                      l++ if (lgt1000) ll++

                                                                                      if (flag12==1)

                                                                                      m++ if (mgt1000) mm++

                                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 13

                                                                                      TROUBLE SHOOT

                                                                                      Troubleshoot

                                                                                      131 TROUBLE SHOOT

                                                                                      A newly assembled circuit does not work may be due to -

                                                                                      Faulty components

                                                                                      Improper soldering

                                                                                      Wrong connections

                                                                                      Also any stop in working after some period may be due to -

                                                                                      Component failure

                                                                                      Supply failure

                                                                                      Damaging of PCB

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                      proper soldering

                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                      continuity and replace it

                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                      during soldering PCB We solved that problem

                                                                                      CHAPTER 14

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      ADVANTAGES OF

                                                                                      THE PROJECT

                                                                                      Advantages

                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                      Simple and hand efficient Microcontroller based system

                                                                                      Fast charging capacity

                                                                                      Simple to operate

                                                                                      Ease of mobility

                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                      Less expensive

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Reduced man power

                                                                                      Low power consumption

                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                      CHAPTER 15

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      DISADVANTAGES

                                                                                      OF THE PROJECT

                                                                                      Disadvantages

                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                      It requires mains supply to work project

                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                      min

                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                      CHAPTER 16

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      APPLICATIONS OF

                                                                                      THE PROJECT

                                                                                      Application

                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                      charge for the mobile phone in any places

                                                                                      It is used for emergency charging purposes

                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                      places

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                      any location where there is a high footfall creating a large number of

                                                                                      potential users

                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                      CHAPTER 17

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      FUTURE

                                                                                      DEVELOPMENT OF

                                                                                      THE PROJECT

                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                      condition in public places

                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                      It will provide battery backup for make it portable

                                                                                      It will also provide SMS system in future

                                                                                      We can also increase the charging time by editing software of the project

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 18

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      COST ANALYSIS

                                                                                      OF THE PROJECT

                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                      1811 Component list for power supply card

                                                                                      Footprint Quantity Designators Rate

                                                                                      Resistor

                                                                                      22K 1 R2 1

                                                                                      1K 1 R1 1

                                                                                      Capacitor

                                                                                      1000uf25V 1 C5 10

                                                                                      2200uf25V 1 C1 10

                                                                                      022uf 2 C6 C2 1

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                      Table 1811 Component list for power supply card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      01uf 2 C4 C3 1

                                                                                      IC

                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                      Connector

                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                      CON PHO 3PIN 1 J1 12

                                                                                      LED3mm red 2 L1 L2 15

                                                                                      Heat sink (TO-220) 2 16

                                                                                      Total 955

                                                                                      1812 Component list for battery charger card

                                                                                      Footprint Quantity Rate

                                                                                      Capacitor

                                                                                      2200uf25V 1 1000

                                                                                      022uf 4 100

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      01uf 4 100

                                                                                      IC

                                                                                      BRIDGE W10 1 500

                                                                                      L7805CV (TO-220) 4 3200

                                                                                      Connector

                                                                                      CON PHO 2PIN 1 800

                                                                                      Relimate 2 pin 1 400

                                                                                      relimate 3 pin 4 2000

                                                                                      Heat sink (TO-220) 4 1200

                                                                                      TOTAL 9300

                                                                                      1813 Component list for Relay card

                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                      Table 1812Component list for battery charger card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                      Total 18900

                                                                                      1814Component list for controller card

                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                      Table 1813Component list for relay card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                      total 27000

                                                                                      1815 Miscellaneous material

                                                                                      Material Quantity Rate

                                                                                      electronic item

                                                                                      Transformer

                                                                                      TXR1 0-9-15 1 20000

                                                                                      0-9 1A

                                                                                      0-15 100mA

                                                                                      TXR2 0-9 1 16500

                                                                                      0-9 1A

                                                                                      Proximity switch 1 20000

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                      Table 1814Component list for microcontroller card

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Red push bottom 4 4000

                                                                                      Green push button 1 1000

                                                                                      Red led 5mm 4 800

                                                                                      Green led 5mm 4 800

                                                                                      Led holder 8 1600

                                                                                      Copper clad 2 4000

                                                                                      3 core cable 1 meter 1500

                                                                                      3 pin plug 1 3000

                                                                                      2 pin relimate wire 19 9000

                                                                                      3 pin relimate wire 5 3750

                                                                                      4 pin relimate wire 2 2000

                                                                                      mechanical items

                                                                                      Enclosure 1 25000

                                                                                      Acrylic sheet 2 X 1 30000

                                                                                      12mm cable gland 1 1000

                                                                                      Screw 3mm 33 2000

                                                                                      Screw 35mm 6 2400

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      10 mm spacers 100 1500

                                                                                      10mm insert to stud 50 10000

                                                                                      cable tie 2500

                                                                                      Total 162350

                                                                                      CHAPTER 19

                                                                                      APPENDIX

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                      Table 1815Component list for miscellaneous material

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      APPENDIX

                                                                                      191 APPENDIX

                                                                                      1911 78xx IC datasheet

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                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1912 W10 datasheet

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1913 4n33 IC datasheet

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                      1914 MAX 232

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1915 ULN2003a IC datasheet

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                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      1916 89V51RD2 IC datasheet

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 20

                                                                                      CONCLUSION

                                                                                      CONCLUSION

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      201 CONCLUSION

                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                      installed in any business premises

                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                      a high footfall creating a large number of potential users

                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                      extend low mobile phone talk time provide battery charging

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 21

                                                                                      IMAGES OF THE

                                                                                      PROJECT

                                                                                      Images of the project

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      211 IMAGES OF THE PROJECT

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Fig 216 Relay driver circuit

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                      Fig214 Power supply circuit

                                                                                      Fig215 Metal detector proximity switch

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Fig217 Microcontroller circuit

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      CHAPTER 22

                                                                                      BIBILOGRAPHY

                                                                                      BIBLIOGRAPHY

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                      221 BIBLIOGRAPHY

                                                                                      BOOKS

                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                      INTERNET LINKS

                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                      • CHAPTER 1

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        When joint is completely covered with molten solder the soldering iron is re-

                                                                                        moved

                                                                                        The joint is allowed to cool without any movement

                                                                                        The bright shining solder indicates good soldering

                                                                                        In case of dry solder joint a air gap remains in between the solder material and

                                                                                        the joint It means that soldering is improper This is removed and again solder-

                                                                                        ing is done

                                                                                        Thus this way all the components are soldered on P C B

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 44

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 10

                                                                                        PCB LAYOUTS

                                                                                        Schematic diagram

                                                                                        Bottom and top layout

                                                                                        101 POWER SUPPLY CARD

                                                                                        1011 SCHIMETIC DIAGRAM

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1012 LEGEND MARKING

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                        Fig1011 Schematic diagram of power supply card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1013TOP LAYER

                                                                                        1014 BOTTOM LAYER

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                        Fig1013 Top layer of power supply

                                                                                        card

                                                                                        Fig1014 Schematic diagram of power supply card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        102 BATTERY CHARGER CARD

                                                                                        1021 SCHEMATIC DIAGRAM

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                        Fig1021 Schematic diagram of battery charger card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        103 RELAY CARD

                                                                                        1031 SCHIMETIC DIAGRAM

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                        Fig1031 Schematic diagram of Relay card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1032 RELAY CARD LEGEND MARKING

                                                                                        1033 TOP LAYER

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                        Fig1032 Legend marking of Relay card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1034 BOTTOM LAYER

                                                                                        104 MICROCONTROLER CARD

                                                                                        1041 SCHIMETIC DIAGRAM

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                        Fig1034 Bottom layer of Relay card

                                                                                        Fig1041 Schematic diagram of microcontroller card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1042 ALL LAYERS

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                        Fig1042 All layer of microcontroller card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 11

                                                                                        INTRODUCTION

                                                                                        OF SOFTWARE

                                                                                        Keil (microVision 2)

                                                                                        Eagle (Easily Applicable Graphical Layout Editor)

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        111 Keil (microVision 2)

                                                                                        1111 Introduction to C51 Cross Compiler

                                                                                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                        generates object code that matches the efficiency and speed of assembly programming

                                                                                        Using a high-level language like C has many advantages over assembly language

                                                                                        programming

                                                                                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                        the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                        Details like register allocation and addressing of the various memory types and data

                                                                                        types is managed by the compiler

                                                                                        Programs get a formal structure (which is imposed by the C programming language) and

                                                                                        can be divided into separate functions This contributes to source code reusability as

                                                                                        well as better overall application structure

                                                                                        The ability to combine variable selection with specific operations improves program

                                                                                        readability

                                                                                        Keywords and operational functions that more nearly resemble the human thought

                                                                                        process may be used

                                                                                        Programming and program test time is drastically reduced

                                                                                        The C run-time library contains many standard routines such as formatted output

                                                                                        numeric conversions and floating-point arithmetic

                                                                                        Existing program parts can be more easily included into new programs because of

                                                                                        modular program construction techniques

                                                                                        The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                        wide popular support and is easily obtained for most systems Existing program

                                                                                        investments can be quickly adapted to other processors as needed

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1112 Software Development Cycle in Keil

                                                                                        When we use the Keil Software tools the

                                                                                        project development cycle is roughly the same as

                                                                                        it is for any other software development project

                                                                                        1 Create a project select the target chip from the

                                                                                        device database and configure the tool settings

                                                                                        2 Create source files in C or assembly

                                                                                        3 Build your application with the project

                                                                                        manager

                                                                                        4 Correct errors in source files

                                                                                        5 Test the linked application A block diagram of

                                                                                        the complete 8051 tool set may best illustrate the

                                                                                        development cycle

                                                                                        112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                        1121 Schematic Editor

                                                                                        In this one can develop amp design circuits for the required PCB

                                                                                        1122 Layout Editor

                                                                                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                        Fig 111 Software development in KEIL

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1123 Library Editor

                                                                                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                        1124 Auto Router

                                                                                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                        the PCB tracks designed

                                                                                        1125 Cam Processor

                                                                                        This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                        Bottom Layer Component Layer Masking Layer etc

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                        Start

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 12

                                                                                        INTRODUCTION

                                                                                        OF

                                                                                        PROGRAMMING

                                                                                        Flowchart of programming

                                                                                        Program code

                                                                                        121 Flowchart

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                        2

                                                                                        flag9==1

                                                                                        flag9=1

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                        flag11==1

                                                                                        flag11=1 flag11=0 flag4=0

                                                                                        REady_LED4=0

                                                                                        Sw2_op (P01) ==0

                                                                                        My delay (10)

                                                                                        3 3

                                                                                        flag2=1 disp2=1 k2=0

                                                                                        3

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                        4

                                                                                        flag11==1

                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                        flag11=1

                                                                                        My delay (10)

                                                                                        flag3=1 disp3=1 k3=0

                                                                                        k1==0||k2==0||k4==0

                                                                                        Sw3_op (P02) ==0

                                                                                        5

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                        flag5==1

                                                                                        5

                                                                                        flag11==1

                                                                                        flag7=1

                                                                                        flag7==1

                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                        6

                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                        flag11=1

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                        6

                                                                                        My delay (10)

                                                                                        flag4=1 disp4=1 k4=0

                                                                                        k1==0||k2==0||k3==0 flag5==1

                                                                                        7

                                                                                        Sw4_op (P03) ==0

                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                        7

                                                                                        flag7==1

                                                                                        flag9==1

                                                                                        flag7=1

                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                        flag9=0 flag3=0 REady_LED3=0

                                                                                        flag9=1

                                                                                        Sw5_op A(P04) ==0

                                                                                        My delay (10)

                                                                                        8

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                        9

                                                                                        flag2==1

                                                                                        flag3==1

                                                                                        8

                                                                                        flag1==1

                                                                                        flag4==1 flag5=1 disp5=1

                                                                                        flag9=1 disp5=1

                                                                                        flag7=1 disp5=1

                                                                                        flag11=1 disp5=1

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                        Sw6_op (P05) ==0

                                                                                        My delay (10)

                                                                                        flag2==1 ampamp flag7==1

                                                                                        flag3==1 ampamp flag9==1 9

                                                                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                        flag8=1 disp6=1

                                                                                        10

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                        10

                                                                                        flag4==1 ampamp flag11==1

                                                                                        flag10=1 disp6=1

                                                                                        flag12=1 disp6=1

                                                                                        flag8==1

                                                                                        flag10==1

                                                                                        11

                                                                                        flag6==1

                                                                                        i++

                                                                                        l++

                                                                                        j++

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                        flag12==1

                                                                                        M++

                                                                                        11

                                                                                        Stop

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        122 Program

                                                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                        define buzzerP2_0 buzzer indication

                                                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                        output Led for indication

                                                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                        function prototype declaration

                                                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                                                        void init_timer() timer 0 initialization function

                                                                                        variable declaration

                                                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        start of main programme

                                                                                        void main()

                                                                                        init_timer() call it timer initialization function

                                                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                        start of while loop

                                                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                        condition for switch1

                                                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                        if(iltk) loop will repeat for desired time of charging

                                                                                        if(igt=1000)

                                                                                        buzzer=1 turn on buzzer if (ii==20)

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        REady_LED1=1 turn on ready indication of led1

                                                                                        else if(ii==40)

                                                                                        REady_LED1=0ii=0

                                                                                        elseREady_LED1=0

                                                                                        START_LED1=1

                                                                                        else

                                                                                        START_LED1=0

                                                                                        k1=1 buzzer=0

                                                                                        REady_LED1=0 flag1=0

                                                                                        flag5=0flag6=0

                                                                                        condition for switch2

                                                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                        REady_LED2=1 turn on ready 2 led indication

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        disp2=0

                                                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                        if(jltk)

                                                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                        elseREady_LED2=0

                                                                                        START_LED2=1

                                                                                        else START_LED2=0

                                                                                        REady_LED2=0 k2=1 buzzer=0

                                                                                        flag2=0flag7=0flag8=0

                                                                                        j=0jj=0

                                                                                        condition for switch 3

                                                                                        if(flag3==1) check swich3 pressed

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        if(disp3==1 )

                                                                                        REady_LED3=1 disp3=0

                                                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                        if(lltk)

                                                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                        elseREady_LED3=0

                                                                                        START_LED3=1

                                                                                        else START_LED3=0

                                                                                        LED2=0 k3=1 buzzer=0

                                                                                        REady_LED3=0 flag3=0

                                                                                        flag9=0flag10=0

                                                                                        l=0ll=0

                                                                                        condition for switch 4

                                                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        REady_LED4=1 disp4=0

                                                                                        if(flag11==1) check coin is pressed

                                                                                        if(flag12==1) START is pressed

                                                                                        if(mltk)

                                                                                        if(mgt1000)

                                                                                        buzzer=1 if(mm==20)

                                                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                        elseREady_LED4=0

                                                                                        START_LED4=1

                                                                                        else START_LED4=0

                                                                                        buzzer=0 k4=1

                                                                                        REady_LED4=0 flag4=0

                                                                                        flag11=0flag12=0

                                                                                        m=0mm=0

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        while(1)

                                                                                        end of main programme

                                                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                        whenever specific time the interrupt will generate control will go in following function

                                                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if(sw1_op==0 ) ready switch flag for system1

                                                                                        my_delay(10) CALL DELAY FUNCTION

                                                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                        if(flag7==1) SET THE FLAG

                                                                                        flag7=1

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                        flag9=1

                                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                        flag11=1

                                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                                        my_delay (10)

                                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                        if(flag5==1)

                                                                                        flag5=1

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                        flag9=1

                                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                        flag11=1

                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                        if(flag7==1)

                                                                                        flag7=1

                                                                                        else

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                        flag5=1

                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                        flag11=1

                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                        if(flag7==1)

                                                                                        flag7=1

                                                                                        elseflag7=0

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                                        flag5=1

                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                        flag9=1

                                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                        if(flag6==1)

                                                                                        i++ if (igt1000) ii++

                                                                                        if (flag8==1)

                                                                                        j++ if(jgt1000) jj++

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        if (flag10==1)

                                                                                        l++ if (lgt1000) ll++

                                                                                        if (flag12==1)

                                                                                        m++ if (mgt1000) mm++

                                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

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                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 13

                                                                                        TROUBLE SHOOT

                                                                                        Troubleshoot

                                                                                        131 TROUBLE SHOOT

                                                                                        A newly assembled circuit does not work may be due to -

                                                                                        Faulty components

                                                                                        Improper soldering

                                                                                        Wrong connections

                                                                                        Also any stop in working after some period may be due to -

                                                                                        Component failure

                                                                                        Supply failure

                                                                                        Damaging of PCB

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                        proper soldering

                                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                                        Resistance measurement is also done which is known as Dry test

                                                                                        During this project work some green LEDs was not glow then we checked it

                                                                                        continuity and replace it

                                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                                        during soldering PCB We solved that problem

                                                                                        CHAPTER 14

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        ADVANTAGES OF

                                                                                        THE PROJECT

                                                                                        Advantages

                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                        Simple and hand efficient Microcontroller based system

                                                                                        Fast charging capacity

                                                                                        Simple to operate

                                                                                        Ease of mobility

                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                        Less expensive

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Reduced man power

                                                                                        Low power consumption

                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                        CHAPTER 15

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        DISADVANTAGES

                                                                                        OF THE PROJECT

                                                                                        Disadvantages

                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                        It requires mains supply to work project

                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                        min

                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                        CHAPTER 16

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        APPLICATIONS OF

                                                                                        THE PROJECT

                                                                                        Application

                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                        charge for the mobile phone in any places

                                                                                        It is used for emergency charging purposes

                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                        places

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                        any location where there is a high footfall creating a large number of

                                                                                        potential users

                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                        CHAPTER 17

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        FUTURE

                                                                                        DEVELOPMENT OF

                                                                                        THE PROJECT

                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                        condition in public places

                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                        It will provide battery backup for make it portable

                                                                                        It will also provide SMS system in future

                                                                                        We can also increase the charging time by editing software of the project

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                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 18

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        COST ANALYSIS

                                                                                        OF THE PROJECT

                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                        1811 Component list for power supply card

                                                                                        Footprint Quantity Designators Rate

                                                                                        Resistor

                                                                                        22K 1 R2 1

                                                                                        1K 1 R1 1

                                                                                        Capacitor

                                                                                        1000uf25V 1 C5 10

                                                                                        2200uf25V 1 C1 10

                                                                                        022uf 2 C6 C2 1

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                        Table 1811 Component list for power supply card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        01uf 2 C4 C3 1

                                                                                        IC

                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                        Connector

                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                        CON PHO 3PIN 1 J1 12

                                                                                        LED3mm red 2 L1 L2 15

                                                                                        Heat sink (TO-220) 2 16

                                                                                        Total 955

                                                                                        1812 Component list for battery charger card

                                                                                        Footprint Quantity Rate

                                                                                        Capacitor

                                                                                        2200uf25V 1 1000

                                                                                        022uf 4 100

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        01uf 4 100

                                                                                        IC

                                                                                        BRIDGE W10 1 500

                                                                                        L7805CV (TO-220) 4 3200

                                                                                        Connector

                                                                                        CON PHO 2PIN 1 800

                                                                                        Relimate 2 pin 1 400

                                                                                        relimate 3 pin 4 2000

                                                                                        Heat sink (TO-220) 4 1200

                                                                                        TOTAL 9300

                                                                                        1813 Component list for Relay card

                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                        Table 1812Component list for battery charger card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                        Total 18900

                                                                                        1814Component list for controller card

                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                        Table 1813Component list for relay card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                        total 27000

                                                                                        1815 Miscellaneous material

                                                                                        Material Quantity Rate

                                                                                        electronic item

                                                                                        Transformer

                                                                                        TXR1 0-9-15 1 20000

                                                                                        0-9 1A

                                                                                        0-15 100mA

                                                                                        TXR2 0-9 1 16500

                                                                                        0-9 1A

                                                                                        Proximity switch 1 20000

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                        Table 1814Component list for microcontroller card

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Red push bottom 4 4000

                                                                                        Green push button 1 1000

                                                                                        Red led 5mm 4 800

                                                                                        Green led 5mm 4 800

                                                                                        Led holder 8 1600

                                                                                        Copper clad 2 4000

                                                                                        3 core cable 1 meter 1500

                                                                                        3 pin plug 1 3000

                                                                                        2 pin relimate wire 19 9000

                                                                                        3 pin relimate wire 5 3750

                                                                                        4 pin relimate wire 2 2000

                                                                                        mechanical items

                                                                                        Enclosure 1 25000

                                                                                        Acrylic sheet 2 X 1 30000

                                                                                        12mm cable gland 1 1000

                                                                                        Screw 3mm 33 2000

                                                                                        Screw 35mm 6 2400

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        10 mm spacers 100 1500

                                                                                        10mm insert to stud 50 10000

                                                                                        cable tie 2500

                                                                                        Total 162350

                                                                                        CHAPTER 19

                                                                                        APPENDIX

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                        Table 1815Component list for miscellaneous material

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        APPENDIX

                                                                                        191 APPENDIX

                                                                                        1911 78xx IC datasheet

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1912 W10 datasheet

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1913 4n33 IC datasheet

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                        1914 MAX 232

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1915 ULN2003a IC datasheet

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        1916 89V51RD2 IC datasheet

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 20

                                                                                        CONCLUSION

                                                                                        CONCLUSION

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        201 CONCLUSION

                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                        installed in any business premises

                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                        a high footfall creating a large number of potential users

                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                        extend low mobile phone talk time provide battery charging

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 21

                                                                                        IMAGES OF THE

                                                                                        PROJECT

                                                                                        Images of the project

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        211 IMAGES OF THE PROJECT

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Fig 216 Relay driver circuit

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                        Fig214 Power supply circuit

                                                                                        Fig215 Metal detector proximity switch

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Fig217 Microcontroller circuit

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        CHAPTER 22

                                                                                        BIBILOGRAPHY

                                                                                        BIBLIOGRAPHY

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                        221 BIBLIOGRAPHY

                                                                                        BOOKS

                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                        INTERNET LINKS

                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                        • CHAPTER 1

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 10

                                                                                          PCB LAYOUTS

                                                                                          Schematic diagram

                                                                                          Bottom and top layout

                                                                                          101 POWER SUPPLY CARD

                                                                                          1011 SCHIMETIC DIAGRAM

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 45

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1012 LEGEND MARKING

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                          Fig1011 Schematic diagram of power supply card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1013TOP LAYER

                                                                                          1014 BOTTOM LAYER

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                          Fig1013 Top layer of power supply

                                                                                          card

                                                                                          Fig1014 Schematic diagram of power supply card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          102 BATTERY CHARGER CARD

                                                                                          1021 SCHEMATIC DIAGRAM

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                          Fig1021 Schematic diagram of battery charger card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          103 RELAY CARD

                                                                                          1031 SCHIMETIC DIAGRAM

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                          Fig1031 Schematic diagram of Relay card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1032 RELAY CARD LEGEND MARKING

                                                                                          1033 TOP LAYER

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                          Fig1032 Legend marking of Relay card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1034 BOTTOM LAYER

                                                                                          104 MICROCONTROLER CARD

                                                                                          1041 SCHIMETIC DIAGRAM

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                          Fig1034 Bottom layer of Relay card

                                                                                          Fig1041 Schematic diagram of microcontroller card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1042 ALL LAYERS

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                          Fig1042 All layer of microcontroller card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 11

                                                                                          INTRODUCTION

                                                                                          OF SOFTWARE

                                                                                          Keil (microVision 2)

                                                                                          Eagle (Easily Applicable Graphical Layout Editor)

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          111 Keil (microVision 2)

                                                                                          1111 Introduction to C51 Cross Compiler

                                                                                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                          generates object code that matches the efficiency and speed of assembly programming

                                                                                          Using a high-level language like C has many advantages over assembly language

                                                                                          programming

                                                                                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                          the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                          Details like register allocation and addressing of the various memory types and data

                                                                                          types is managed by the compiler

                                                                                          Programs get a formal structure (which is imposed by the C programming language) and

                                                                                          can be divided into separate functions This contributes to source code reusability as

                                                                                          well as better overall application structure

                                                                                          The ability to combine variable selection with specific operations improves program

                                                                                          readability

                                                                                          Keywords and operational functions that more nearly resemble the human thought

                                                                                          process may be used

                                                                                          Programming and program test time is drastically reduced

                                                                                          The C run-time library contains many standard routines such as formatted output

                                                                                          numeric conversions and floating-point arithmetic

                                                                                          Existing program parts can be more easily included into new programs because of

                                                                                          modular program construction techniques

                                                                                          The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                          wide popular support and is easily obtained for most systems Existing program

                                                                                          investments can be quickly adapted to other processors as needed

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1112 Software Development Cycle in Keil

                                                                                          When we use the Keil Software tools the

                                                                                          project development cycle is roughly the same as

                                                                                          it is for any other software development project

                                                                                          1 Create a project select the target chip from the

                                                                                          device database and configure the tool settings

                                                                                          2 Create source files in C or assembly

                                                                                          3 Build your application with the project

                                                                                          manager

                                                                                          4 Correct errors in source files

                                                                                          5 Test the linked application A block diagram of

                                                                                          the complete 8051 tool set may best illustrate the

                                                                                          development cycle

                                                                                          112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                          1121 Schematic Editor

                                                                                          In this one can develop amp design circuits for the required PCB

                                                                                          1122 Layout Editor

                                                                                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                          Fig 111 Software development in KEIL

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1123 Library Editor

                                                                                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                          1124 Auto Router

                                                                                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                          the PCB tracks designed

                                                                                          1125 Cam Processor

                                                                                          This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                          Bottom Layer Component Layer Masking Layer etc

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                          Start

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 12

                                                                                          INTRODUCTION

                                                                                          OF

                                                                                          PROGRAMMING

                                                                                          Flowchart of programming

                                                                                          Program code

                                                                                          121 Flowchart

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                          2

                                                                                          flag9==1

                                                                                          flag9=1

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                          flag11==1

                                                                                          flag11=1 flag11=0 flag4=0

                                                                                          REady_LED4=0

                                                                                          Sw2_op (P01) ==0

                                                                                          My delay (10)

                                                                                          3 3

                                                                                          flag2=1 disp2=1 k2=0

                                                                                          3

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                          4

                                                                                          flag11==1

                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                          flag11=1

                                                                                          My delay (10)

                                                                                          flag3=1 disp3=1 k3=0

                                                                                          k1==0||k2==0||k4==0

                                                                                          Sw3_op (P02) ==0

                                                                                          5

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                          flag5==1

                                                                                          5

                                                                                          flag11==1

                                                                                          flag7=1

                                                                                          flag7==1

                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                          6

                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                          flag11=1

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                          6

                                                                                          My delay (10)

                                                                                          flag4=1 disp4=1 k4=0

                                                                                          k1==0||k2==0||k3==0 flag5==1

                                                                                          7

                                                                                          Sw4_op (P03) ==0

                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                          7

                                                                                          flag7==1

                                                                                          flag9==1

                                                                                          flag7=1

                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                          flag9=0 flag3=0 REady_LED3=0

                                                                                          flag9=1

                                                                                          Sw5_op A(P04) ==0

                                                                                          My delay (10)

                                                                                          8

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                          9

                                                                                          flag2==1

                                                                                          flag3==1

                                                                                          8

                                                                                          flag1==1

                                                                                          flag4==1 flag5=1 disp5=1

                                                                                          flag9=1 disp5=1

                                                                                          flag7=1 disp5=1

                                                                                          flag11=1 disp5=1

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                          Sw6_op (P05) ==0

                                                                                          My delay (10)

                                                                                          flag2==1 ampamp flag7==1

                                                                                          flag3==1 ampamp flag9==1 9

                                                                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                          flag8=1 disp6=1

                                                                                          10

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                          10

                                                                                          flag4==1 ampamp flag11==1

                                                                                          flag10=1 disp6=1

                                                                                          flag12=1 disp6=1

                                                                                          flag8==1

                                                                                          flag10==1

                                                                                          11

                                                                                          flag6==1

                                                                                          i++

                                                                                          l++

                                                                                          j++

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                          flag12==1

                                                                                          M++

                                                                                          11

                                                                                          Stop

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          122 Program

                                                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                          define buzzerP2_0 buzzer indication

                                                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                          output Led for indication

                                                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                          function prototype declaration

                                                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                                                          void init_timer() timer 0 initialization function

                                                                                          variable declaration

                                                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          start of main programme

                                                                                          void main()

                                                                                          init_timer() call it timer initialization function

                                                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                          start of while loop

                                                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                          condition for switch1

                                                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                          if(iltk) loop will repeat for desired time of charging

                                                                                          if(igt=1000)

                                                                                          buzzer=1 turn on buzzer if (ii==20)

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          REady_LED1=1 turn on ready indication of led1

                                                                                          else if(ii==40)

                                                                                          REady_LED1=0ii=0

                                                                                          elseREady_LED1=0

                                                                                          START_LED1=1

                                                                                          else

                                                                                          START_LED1=0

                                                                                          k1=1 buzzer=0

                                                                                          REady_LED1=0 flag1=0

                                                                                          flag5=0flag6=0

                                                                                          condition for switch2

                                                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                          REady_LED2=1 turn on ready 2 led indication

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          disp2=0

                                                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                          if(jltk)

                                                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                          elseREady_LED2=0

                                                                                          START_LED2=1

                                                                                          else START_LED2=0

                                                                                          REady_LED2=0 k2=1 buzzer=0

                                                                                          flag2=0flag7=0flag8=0

                                                                                          j=0jj=0

                                                                                          condition for switch 3

                                                                                          if(flag3==1) check swich3 pressed

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          if(disp3==1 )

                                                                                          REady_LED3=1 disp3=0

                                                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                          if(lltk)

                                                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                          elseREady_LED3=0

                                                                                          START_LED3=1

                                                                                          else START_LED3=0

                                                                                          LED2=0 k3=1 buzzer=0

                                                                                          REady_LED3=0 flag3=0

                                                                                          flag9=0flag10=0

                                                                                          l=0ll=0

                                                                                          condition for switch 4

                                                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          REady_LED4=1 disp4=0

                                                                                          if(flag11==1) check coin is pressed

                                                                                          if(flag12==1) START is pressed

                                                                                          if(mltk)

                                                                                          if(mgt1000)

                                                                                          buzzer=1 if(mm==20)

                                                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                          elseREady_LED4=0

                                                                                          START_LED4=1

                                                                                          else START_LED4=0

                                                                                          buzzer=0 k4=1

                                                                                          REady_LED4=0 flag4=0

                                                                                          flag11=0flag12=0

                                                                                          m=0mm=0

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          while(1)

                                                                                          end of main programme

                                                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                          whenever specific time the interrupt will generate control will go in following function

                                                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if(sw1_op==0 ) ready switch flag for system1

                                                                                          my_delay(10) CALL DELAY FUNCTION

                                                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                          if(flag7==1) SET THE FLAG

                                                                                          flag7=1

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                          flag9=1

                                                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                          flag11=1

                                                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if(sw2_op==0 ) fready switch flag for system2

                                                                                          my_delay (10)

                                                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                          if(flag5==1)

                                                                                          flag5=1

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                          flag9=1

                                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                          flag11=1

                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                          if(flag7==1)

                                                                                          flag7=1

                                                                                          else

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                          flag5=1

                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                          flag11=1

                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                          if(flag7==1)

                                                                                          flag7=1

                                                                                          elseflag7=0

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                                          flag5=1

                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                          flag9=1

                                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                          if(flag6==1)

                                                                                          i++ if (igt1000) ii++

                                                                                          if (flag8==1)

                                                                                          j++ if(jgt1000) jj++

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          if (flag10==1)

                                                                                          l++ if (lgt1000) ll++

                                                                                          if (flag12==1)

                                                                                          m++ if (mgt1000) mm++

                                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 13

                                                                                          TROUBLE SHOOT

                                                                                          Troubleshoot

                                                                                          131 TROUBLE SHOOT

                                                                                          A newly assembled circuit does not work may be due to -

                                                                                          Faulty components

                                                                                          Improper soldering

                                                                                          Wrong connections

                                                                                          Also any stop in working after some period may be due to -

                                                                                          Component failure

                                                                                          Supply failure

                                                                                          Damaging of PCB

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                          proper soldering

                                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                                          Resistance measurement is also done which is known as Dry test

                                                                                          During this project work some green LEDs was not glow then we checked it

                                                                                          continuity and replace it

                                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                                          during soldering PCB We solved that problem

                                                                                          CHAPTER 14

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          ADVANTAGES OF

                                                                                          THE PROJECT

                                                                                          Advantages

                                                                                          141 ADVANTAGES OF THE PROJECT

                                                                                          Simple and hand efficient Microcontroller based system

                                                                                          Fast charging capacity

                                                                                          Simple to operate

                                                                                          Ease of mobility

                                                                                          Facilitates connectivity for 90 of cellular phones

                                                                                          Less expensive

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Reduced man power

                                                                                          Low power consumption

                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                          CHAPTER 15

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          DISADVANTAGES

                                                                                          OF THE PROJECT

                                                                                          Disadvantages

                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                          It requires mains supply to work project

                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                          min

                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                          CHAPTER 16

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          APPLICATIONS OF

                                                                                          THE PROJECT

                                                                                          Application

                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                          charge for the mobile phone in any places

                                                                                          It is used for emergency charging purposes

                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                          places

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                          any location where there is a high footfall creating a large number of

                                                                                          potential users

                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                          CHAPTER 17

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          FUTURE

                                                                                          DEVELOPMENT OF

                                                                                          THE PROJECT

                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                          condition in public places

                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                          It will provide battery backup for make it portable

                                                                                          It will also provide SMS system in future

                                                                                          We can also increase the charging time by editing software of the project

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 18

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          COST ANALYSIS

                                                                                          OF THE PROJECT

                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                          1811 Component list for power supply card

                                                                                          Footprint Quantity Designators Rate

                                                                                          Resistor

                                                                                          22K 1 R2 1

                                                                                          1K 1 R1 1

                                                                                          Capacitor

                                                                                          1000uf25V 1 C5 10

                                                                                          2200uf25V 1 C1 10

                                                                                          022uf 2 C6 C2 1

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                          Table 1811 Component list for power supply card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          01uf 2 C4 C3 1

                                                                                          IC

                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                          Connector

                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                          CON PHO 3PIN 1 J1 12

                                                                                          LED3mm red 2 L1 L2 15

                                                                                          Heat sink (TO-220) 2 16

                                                                                          Total 955

                                                                                          1812 Component list for battery charger card

                                                                                          Footprint Quantity Rate

                                                                                          Capacitor

                                                                                          2200uf25V 1 1000

                                                                                          022uf 4 100

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          01uf 4 100

                                                                                          IC

                                                                                          BRIDGE W10 1 500

                                                                                          L7805CV (TO-220) 4 3200

                                                                                          Connector

                                                                                          CON PHO 2PIN 1 800

                                                                                          Relimate 2 pin 1 400

                                                                                          relimate 3 pin 4 2000

                                                                                          Heat sink (TO-220) 4 1200

                                                                                          TOTAL 9300

                                                                                          1813 Component list for Relay card

                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                          Table 1812Component list for battery charger card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                          Total 18900

                                                                                          1814Component list for controller card

                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                          Table 1813Component list for relay card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                          total 27000

                                                                                          1815 Miscellaneous material

                                                                                          Material Quantity Rate

                                                                                          electronic item

                                                                                          Transformer

                                                                                          TXR1 0-9-15 1 20000

                                                                                          0-9 1A

                                                                                          0-15 100mA

                                                                                          TXR2 0-9 1 16500

                                                                                          0-9 1A

                                                                                          Proximity switch 1 20000

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                          Table 1814Component list for microcontroller card

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Red push bottom 4 4000

                                                                                          Green push button 1 1000

                                                                                          Red led 5mm 4 800

                                                                                          Green led 5mm 4 800

                                                                                          Led holder 8 1600

                                                                                          Copper clad 2 4000

                                                                                          3 core cable 1 meter 1500

                                                                                          3 pin plug 1 3000

                                                                                          2 pin relimate wire 19 9000

                                                                                          3 pin relimate wire 5 3750

                                                                                          4 pin relimate wire 2 2000

                                                                                          mechanical items

                                                                                          Enclosure 1 25000

                                                                                          Acrylic sheet 2 X 1 30000

                                                                                          12mm cable gland 1 1000

                                                                                          Screw 3mm 33 2000

                                                                                          Screw 35mm 6 2400

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          10 mm spacers 100 1500

                                                                                          10mm insert to stud 50 10000

                                                                                          cable tie 2500

                                                                                          Total 162350

                                                                                          CHAPTER 19

                                                                                          APPENDIX

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                          Table 1815Component list for miscellaneous material

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          APPENDIX

                                                                                          191 APPENDIX

                                                                                          1911 78xx IC datasheet

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                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1912 W10 datasheet

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1913 4n33 IC datasheet

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                          1914 MAX 232

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1915 ULN2003a IC datasheet

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                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          1916 89V51RD2 IC datasheet

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 20

                                                                                          CONCLUSION

                                                                                          CONCLUSION

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          201 CONCLUSION

                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                          installed in any business premises

                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                          a high footfall creating a large number of potential users

                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                          extend low mobile phone talk time provide battery charging

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 21

                                                                                          IMAGES OF THE

                                                                                          PROJECT

                                                                                          Images of the project

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          211 IMAGES OF THE PROJECT

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Fig 216 Relay driver circuit

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                          Fig214 Power supply circuit

                                                                                          Fig215 Metal detector proximity switch

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Fig217 Microcontroller circuit

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          CHAPTER 22

                                                                                          BIBILOGRAPHY

                                                                                          BIBLIOGRAPHY

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                          221 BIBLIOGRAPHY

                                                                                          BOOKS

                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                          INTERNET LINKS

                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                          • CHAPTER 1

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1012 LEGEND MARKING

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 46

                                                                                            Fig1011 Schematic diagram of power supply card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1013TOP LAYER

                                                                                            1014 BOTTOM LAYER

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                            Fig1013 Top layer of power supply

                                                                                            card

                                                                                            Fig1014 Schematic diagram of power supply card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            102 BATTERY CHARGER CARD

                                                                                            1021 SCHEMATIC DIAGRAM

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                            Fig1021 Schematic diagram of battery charger card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            103 RELAY CARD

                                                                                            1031 SCHIMETIC DIAGRAM

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                            Fig1031 Schematic diagram of Relay card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1032 RELAY CARD LEGEND MARKING

                                                                                            1033 TOP LAYER

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                            Fig1032 Legend marking of Relay card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1034 BOTTOM LAYER

                                                                                            104 MICROCONTROLER CARD

                                                                                            1041 SCHIMETIC DIAGRAM

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                            Fig1034 Bottom layer of Relay card

                                                                                            Fig1041 Schematic diagram of microcontroller card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1042 ALL LAYERS

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                            Fig1042 All layer of microcontroller card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 11

                                                                                            INTRODUCTION

                                                                                            OF SOFTWARE

                                                                                            Keil (microVision 2)

                                                                                            Eagle (Easily Applicable Graphical Layout Editor)

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            111 Keil (microVision 2)

                                                                                            1111 Introduction to C51 Cross Compiler

                                                                                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                            generates object code that matches the efficiency and speed of assembly programming

                                                                                            Using a high-level language like C has many advantages over assembly language

                                                                                            programming

                                                                                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                            the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                            Details like register allocation and addressing of the various memory types and data

                                                                                            types is managed by the compiler

                                                                                            Programs get a formal structure (which is imposed by the C programming language) and

                                                                                            can be divided into separate functions This contributes to source code reusability as

                                                                                            well as better overall application structure

                                                                                            The ability to combine variable selection with specific operations improves program

                                                                                            readability

                                                                                            Keywords and operational functions that more nearly resemble the human thought

                                                                                            process may be used

                                                                                            Programming and program test time is drastically reduced

                                                                                            The C run-time library contains many standard routines such as formatted output

                                                                                            numeric conversions and floating-point arithmetic

                                                                                            Existing program parts can be more easily included into new programs because of

                                                                                            modular program construction techniques

                                                                                            The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                            wide popular support and is easily obtained for most systems Existing program

                                                                                            investments can be quickly adapted to other processors as needed

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1112 Software Development Cycle in Keil

                                                                                            When we use the Keil Software tools the

                                                                                            project development cycle is roughly the same as

                                                                                            it is for any other software development project

                                                                                            1 Create a project select the target chip from the

                                                                                            device database and configure the tool settings

                                                                                            2 Create source files in C or assembly

                                                                                            3 Build your application with the project

                                                                                            manager

                                                                                            4 Correct errors in source files

                                                                                            5 Test the linked application A block diagram of

                                                                                            the complete 8051 tool set may best illustrate the

                                                                                            development cycle

                                                                                            112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                            1121 Schematic Editor

                                                                                            In this one can develop amp design circuits for the required PCB

                                                                                            1122 Layout Editor

                                                                                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                            Fig 111 Software development in KEIL

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1123 Library Editor

                                                                                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                            1124 Auto Router

                                                                                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                            the PCB tracks designed

                                                                                            1125 Cam Processor

                                                                                            This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                            Bottom Layer Component Layer Masking Layer etc

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                            Start

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 12

                                                                                            INTRODUCTION

                                                                                            OF

                                                                                            PROGRAMMING

                                                                                            Flowchart of programming

                                                                                            Program code

                                                                                            121 Flowchart

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                            2

                                                                                            flag9==1

                                                                                            flag9=1

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                            flag11==1

                                                                                            flag11=1 flag11=0 flag4=0

                                                                                            REady_LED4=0

                                                                                            Sw2_op (P01) ==0

                                                                                            My delay (10)

                                                                                            3 3

                                                                                            flag2=1 disp2=1 k2=0

                                                                                            3

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                            4

                                                                                            flag11==1

                                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                                            flag11=1

                                                                                            My delay (10)

                                                                                            flag3=1 disp3=1 k3=0

                                                                                            k1==0||k2==0||k4==0

                                                                                            Sw3_op (P02) ==0

                                                                                            5

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                            flag5==1

                                                                                            5

                                                                                            flag11==1

                                                                                            flag7=1

                                                                                            flag7==1

                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                            6

                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                                            flag11=1

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                            6

                                                                                            My delay (10)

                                                                                            flag4=1 disp4=1 k4=0

                                                                                            k1==0||k2==0||k3==0 flag5==1

                                                                                            7

                                                                                            Sw4_op (P03) ==0

                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                            7

                                                                                            flag7==1

                                                                                            flag9==1

                                                                                            flag7=1

                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                            flag9=0 flag3=0 REady_LED3=0

                                                                                            flag9=1

                                                                                            Sw5_op A(P04) ==0

                                                                                            My delay (10)

                                                                                            8

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                            9

                                                                                            flag2==1

                                                                                            flag3==1

                                                                                            8

                                                                                            flag1==1

                                                                                            flag4==1 flag5=1 disp5=1

                                                                                            flag9=1 disp5=1

                                                                                            flag7=1 disp5=1

                                                                                            flag11=1 disp5=1

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                            Sw6_op (P05) ==0

                                                                                            My delay (10)

                                                                                            flag2==1 ampamp flag7==1

                                                                                            flag3==1 ampamp flag9==1 9

                                                                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                            flag8=1 disp6=1

                                                                                            10

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                            10

                                                                                            flag4==1 ampamp flag11==1

                                                                                            flag10=1 disp6=1

                                                                                            flag12=1 disp6=1

                                                                                            flag8==1

                                                                                            flag10==1

                                                                                            11

                                                                                            flag6==1

                                                                                            i++

                                                                                            l++

                                                                                            j++

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                            flag12==1

                                                                                            M++

                                                                                            11

                                                                                            Stop

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            122 Program

                                                                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                            define buzzerP2_0 buzzer indication

                                                                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                            sbit sw5_op=P0^4 input switch5 for coin

                                                                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                            output Led for indication

                                                                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                            function prototype declaration

                                                                                            void my_delay(unsigned int value) DELAY FUCTION

                                                                                            void init_timer() timer 0 initialization function

                                                                                            variable declaration

                                                                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            start of main programme

                                                                                            void main()

                                                                                            init_timer() call it timer initialization function

                                                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                            start of while loop

                                                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                            condition for switch1

                                                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                            if(iltk) loop will repeat for desired time of charging

                                                                                            if(igt=1000)

                                                                                            buzzer=1 turn on buzzer if (ii==20)

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            REady_LED1=1 turn on ready indication of led1

                                                                                            else if(ii==40)

                                                                                            REady_LED1=0ii=0

                                                                                            elseREady_LED1=0

                                                                                            START_LED1=1

                                                                                            else

                                                                                            START_LED1=0

                                                                                            k1=1 buzzer=0

                                                                                            REady_LED1=0 flag1=0

                                                                                            flag5=0flag6=0

                                                                                            condition for switch2

                                                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                            REady_LED2=1 turn on ready 2 led indication

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            disp2=0

                                                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                            if(jltk)

                                                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                            elseREady_LED2=0

                                                                                            START_LED2=1

                                                                                            else START_LED2=0

                                                                                            REady_LED2=0 k2=1 buzzer=0

                                                                                            flag2=0flag7=0flag8=0

                                                                                            j=0jj=0

                                                                                            condition for switch 3

                                                                                            if(flag3==1) check swich3 pressed

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            if(disp3==1 )

                                                                                            REady_LED3=1 disp3=0

                                                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                            if(lltk)

                                                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                            elseREady_LED3=0

                                                                                            START_LED3=1

                                                                                            else START_LED3=0

                                                                                            LED2=0 k3=1 buzzer=0

                                                                                            REady_LED3=0 flag3=0

                                                                                            flag9=0flag10=0

                                                                                            l=0ll=0

                                                                                            condition for switch 4

                                                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            REady_LED4=1 disp4=0

                                                                                            if(flag11==1) check coin is pressed

                                                                                            if(flag12==1) START is pressed

                                                                                            if(mltk)

                                                                                            if(mgt1000)

                                                                                            buzzer=1 if(mm==20)

                                                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                            elseREady_LED4=0

                                                                                            START_LED4=1

                                                                                            else START_LED4=0

                                                                                            buzzer=0 k4=1

                                                                                            REady_LED4=0 flag4=0

                                                                                            flag11=0flag12=0

                                                                                            m=0mm=0

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            while(1)

                                                                                            end of main programme

                                                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                            whenever specific time the interrupt will generate control will go in following function

                                                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if(sw1_op==0 ) ready switch flag for system1

                                                                                            my_delay(10) CALL DELAY FUNCTION

                                                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                            if(flag7==1) SET THE FLAG

                                                                                            flag7=1

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                            flag9=1

                                                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                            flag11=1

                                                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if(sw2_op==0 ) fready switch flag for system2

                                                                                            my_delay (10)

                                                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                            if(flag5==1)

                                                                                            flag5=1

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                            flag9=1

                                                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                            flag11=1

                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                            if(flag7==1)

                                                                                            flag7=1

                                                                                            else

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                            flag5=1

                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                            flag11=1

                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                            if(flag7==1)

                                                                                            flag7=1

                                                                                            elseflag7=0

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                                            flag5=1

                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                            flag9=1

                                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                            if(flag6==1)

                                                                                            i++ if (igt1000) ii++

                                                                                            if (flag8==1)

                                                                                            j++ if(jgt1000) jj++

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            if (flag10==1)

                                                                                            l++ if (lgt1000) ll++

                                                                                            if (flag12==1)

                                                                                            m++ if (mgt1000) mm++

                                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 13

                                                                                            TROUBLE SHOOT

                                                                                            Troubleshoot

                                                                                            131 TROUBLE SHOOT

                                                                                            A newly assembled circuit does not work may be due to -

                                                                                            Faulty components

                                                                                            Improper soldering

                                                                                            Wrong connections

                                                                                            Also any stop in working after some period may be due to -

                                                                                            Component failure

                                                                                            Supply failure

                                                                                            Damaging of PCB

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                            proper soldering

                                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                                            Resistance measurement is also done which is known as Dry test

                                                                                            During this project work some green LEDs was not glow then we checked it

                                                                                            continuity and replace it

                                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                                            during soldering PCB We solved that problem

                                                                                            CHAPTER 14

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            ADVANTAGES OF

                                                                                            THE PROJECT

                                                                                            Advantages

                                                                                            141 ADVANTAGES OF THE PROJECT

                                                                                            Simple and hand efficient Microcontroller based system

                                                                                            Fast charging capacity

                                                                                            Simple to operate

                                                                                            Ease of mobility

                                                                                            Facilitates connectivity for 90 of cellular phones

                                                                                            Less expensive

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Reduced man power

                                                                                            Low power consumption

                                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                                            CHAPTER 15

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            DISADVANTAGES

                                                                                            OF THE PROJECT

                                                                                            Disadvantages

                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                            It requires mains supply to work project

                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                            min

                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                            CHAPTER 16

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            APPLICATIONS OF

                                                                                            THE PROJECT

                                                                                            Application

                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                            charge for the mobile phone in any places

                                                                                            It is used for emergency charging purposes

                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                            places

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                            any location where there is a high footfall creating a large number of

                                                                                            potential users

                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                            CHAPTER 17

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            FUTURE

                                                                                            DEVELOPMENT OF

                                                                                            THE PROJECT

                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                            condition in public places

                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                            It will provide battery backup for make it portable

                                                                                            It will also provide SMS system in future

                                                                                            We can also increase the charging time by editing software of the project

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 18

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            COST ANALYSIS

                                                                                            OF THE PROJECT

                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                            1811 Component list for power supply card

                                                                                            Footprint Quantity Designators Rate

                                                                                            Resistor

                                                                                            22K 1 R2 1

                                                                                            1K 1 R1 1

                                                                                            Capacitor

                                                                                            1000uf25V 1 C5 10

                                                                                            2200uf25V 1 C1 10

                                                                                            022uf 2 C6 C2 1

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                            Table 1811 Component list for power supply card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            01uf 2 C4 C3 1

                                                                                            IC

                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                            Connector

                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                            CON PHO 3PIN 1 J1 12

                                                                                            LED3mm red 2 L1 L2 15

                                                                                            Heat sink (TO-220) 2 16

                                                                                            Total 955

                                                                                            1812 Component list for battery charger card

                                                                                            Footprint Quantity Rate

                                                                                            Capacitor

                                                                                            2200uf25V 1 1000

                                                                                            022uf 4 100

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            01uf 4 100

                                                                                            IC

                                                                                            BRIDGE W10 1 500

                                                                                            L7805CV (TO-220) 4 3200

                                                                                            Connector

                                                                                            CON PHO 2PIN 1 800

                                                                                            Relimate 2 pin 1 400

                                                                                            relimate 3 pin 4 2000

                                                                                            Heat sink (TO-220) 4 1200

                                                                                            TOTAL 9300

                                                                                            1813 Component list for Relay card

                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                            Table 1812Component list for battery charger card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                            Total 18900

                                                                                            1814Component list for controller card

                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                            Table 1813Component list for relay card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                            total 27000

                                                                                            1815 Miscellaneous material

                                                                                            Material Quantity Rate

                                                                                            electronic item

                                                                                            Transformer

                                                                                            TXR1 0-9-15 1 20000

                                                                                            0-9 1A

                                                                                            0-15 100mA

                                                                                            TXR2 0-9 1 16500

                                                                                            0-9 1A

                                                                                            Proximity switch 1 20000

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                            Table 1814Component list for microcontroller card

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Red push bottom 4 4000

                                                                                            Green push button 1 1000

                                                                                            Red led 5mm 4 800

                                                                                            Green led 5mm 4 800

                                                                                            Led holder 8 1600

                                                                                            Copper clad 2 4000

                                                                                            3 core cable 1 meter 1500

                                                                                            3 pin plug 1 3000

                                                                                            2 pin relimate wire 19 9000

                                                                                            3 pin relimate wire 5 3750

                                                                                            4 pin relimate wire 2 2000

                                                                                            mechanical items

                                                                                            Enclosure 1 25000

                                                                                            Acrylic sheet 2 X 1 30000

                                                                                            12mm cable gland 1 1000

                                                                                            Screw 3mm 33 2000

                                                                                            Screw 35mm 6 2400

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            10 mm spacers 100 1500

                                                                                            10mm insert to stud 50 10000

                                                                                            cable tie 2500

                                                                                            Total 162350

                                                                                            CHAPTER 19

                                                                                            APPENDIX

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                            Table 1815Component list for miscellaneous material

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            APPENDIX

                                                                                            191 APPENDIX

                                                                                            1911 78xx IC datasheet

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1912 W10 datasheet

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1913 4n33 IC datasheet

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                            1914 MAX 232

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1915 ULN2003a IC datasheet

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            1916 89V51RD2 IC datasheet

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 20

                                                                                            CONCLUSION

                                                                                            CONCLUSION

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            201 CONCLUSION

                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                            installed in any business premises

                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                            a high footfall creating a large number of potential users

                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                            extend low mobile phone talk time provide battery charging

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 21

                                                                                            IMAGES OF THE

                                                                                            PROJECT

                                                                                            Images of the project

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            211 IMAGES OF THE PROJECT

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Fig 216 Relay driver circuit

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                            Fig214 Power supply circuit

                                                                                            Fig215 Metal detector proximity switch

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Fig217 Microcontroller circuit

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            CHAPTER 22

                                                                                            BIBILOGRAPHY

                                                                                            BIBLIOGRAPHY

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                            221 BIBLIOGRAPHY

                                                                                            BOOKS

                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                            INTERNET LINKS

                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                            • CHAPTER 1

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1013TOP LAYER

                                                                                              1014 BOTTOM LAYER

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 47

                                                                                              Fig1013 Top layer of power supply

                                                                                              card

                                                                                              Fig1014 Schematic diagram of power supply card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              102 BATTERY CHARGER CARD

                                                                                              1021 SCHEMATIC DIAGRAM

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                              Fig1021 Schematic diagram of battery charger card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              103 RELAY CARD

                                                                                              1031 SCHIMETIC DIAGRAM

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                              Fig1031 Schematic diagram of Relay card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1032 RELAY CARD LEGEND MARKING

                                                                                              1033 TOP LAYER

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                              Fig1032 Legend marking of Relay card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1034 BOTTOM LAYER

                                                                                              104 MICROCONTROLER CARD

                                                                                              1041 SCHIMETIC DIAGRAM

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                              Fig1034 Bottom layer of Relay card

                                                                                              Fig1041 Schematic diagram of microcontroller card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1042 ALL LAYERS

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                              Fig1042 All layer of microcontroller card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 11

                                                                                              INTRODUCTION

                                                                                              OF SOFTWARE

                                                                                              Keil (microVision 2)

                                                                                              Eagle (Easily Applicable Graphical Layout Editor)

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              111 Keil (microVision 2)

                                                                                              1111 Introduction to C51 Cross Compiler

                                                                                              The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                              generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                              generates object code that matches the efficiency and speed of assembly programming

                                                                                              Using a high-level language like C has many advantages over assembly language

                                                                                              programming

                                                                                              Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                              the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                              Details like register allocation and addressing of the various memory types and data

                                                                                              types is managed by the compiler

                                                                                              Programs get a formal structure (which is imposed by the C programming language) and

                                                                                              can be divided into separate functions This contributes to source code reusability as

                                                                                              well as better overall application structure

                                                                                              The ability to combine variable selection with specific operations improves program

                                                                                              readability

                                                                                              Keywords and operational functions that more nearly resemble the human thought

                                                                                              process may be used

                                                                                              Programming and program test time is drastically reduced

                                                                                              The C run-time library contains many standard routines such as formatted output

                                                                                              numeric conversions and floating-point arithmetic

                                                                                              Existing program parts can be more easily included into new programs because of

                                                                                              modular program construction techniques

                                                                                              The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                              wide popular support and is easily obtained for most systems Existing program

                                                                                              investments can be quickly adapted to other processors as needed

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1112 Software Development Cycle in Keil

                                                                                              When we use the Keil Software tools the

                                                                                              project development cycle is roughly the same as

                                                                                              it is for any other software development project

                                                                                              1 Create a project select the target chip from the

                                                                                              device database and configure the tool settings

                                                                                              2 Create source files in C or assembly

                                                                                              3 Build your application with the project

                                                                                              manager

                                                                                              4 Correct errors in source files

                                                                                              5 Test the linked application A block diagram of

                                                                                              the complete 8051 tool set may best illustrate the

                                                                                              development cycle

                                                                                              112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                              1121 Schematic Editor

                                                                                              In this one can develop amp design circuits for the required PCB

                                                                                              1122 Layout Editor

                                                                                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                              Fig 111 Software development in KEIL

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1123 Library Editor

                                                                                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                              1124 Auto Router

                                                                                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                              the PCB tracks designed

                                                                                              1125 Cam Processor

                                                                                              This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                              Bottom Layer Component Layer Masking Layer etc

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                              Start

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 12

                                                                                              INTRODUCTION

                                                                                              OF

                                                                                              PROGRAMMING

                                                                                              Flowchart of programming

                                                                                              Program code

                                                                                              121 Flowchart

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                              2

                                                                                              flag9==1

                                                                                              flag9=1

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                              flag11==1

                                                                                              flag11=1 flag11=0 flag4=0

                                                                                              REady_LED4=0

                                                                                              Sw2_op (P01) ==0

                                                                                              My delay (10)

                                                                                              3 3

                                                                                              flag2=1 disp2=1 k2=0

                                                                                              3

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                              4

                                                                                              flag11==1

                                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                                              flag11=1

                                                                                              My delay (10)

                                                                                              flag3=1 disp3=1 k3=0

                                                                                              k1==0||k2==0||k4==0

                                                                                              Sw3_op (P02) ==0

                                                                                              5

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                              flag5==1

                                                                                              5

                                                                                              flag11==1

                                                                                              flag7=1

                                                                                              flag7==1

                                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                                              6

                                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                                              flag11=1

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                              6

                                                                                              My delay (10)

                                                                                              flag4=1 disp4=1 k4=0

                                                                                              k1==0||k2==0||k3==0 flag5==1

                                                                                              7

                                                                                              Sw4_op (P03) ==0

                                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                              7

                                                                                              flag7==1

                                                                                              flag9==1

                                                                                              flag7=1

                                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                                              flag9=0 flag3=0 REady_LED3=0

                                                                                              flag9=1

                                                                                              Sw5_op A(P04) ==0

                                                                                              My delay (10)

                                                                                              8

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                              9

                                                                                              flag2==1

                                                                                              flag3==1

                                                                                              8

                                                                                              flag1==1

                                                                                              flag4==1 flag5=1 disp5=1

                                                                                              flag9=1 disp5=1

                                                                                              flag7=1 disp5=1

                                                                                              flag11=1 disp5=1

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                              Sw6_op (P05) ==0

                                                                                              My delay (10)

                                                                                              flag2==1 ampamp flag7==1

                                                                                              flag3==1 ampamp flag9==1 9

                                                                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                              flag8=1 disp6=1

                                                                                              10

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                              10

                                                                                              flag4==1 ampamp flag11==1

                                                                                              flag10=1 disp6=1

                                                                                              flag12=1 disp6=1

                                                                                              flag8==1

                                                                                              flag10==1

                                                                                              11

                                                                                              flag6==1

                                                                                              i++

                                                                                              l++

                                                                                              j++

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                              flag12==1

                                                                                              M++

                                                                                              11

                                                                                              Stop

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              122 Program

                                                                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                              define buzzerP2_0 buzzer indication

                                                                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                              sbit sw5_op=P0^4 input switch5 for coin

                                                                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                              output Led for indication

                                                                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                              function prototype declaration

                                                                                              void my_delay(unsigned int value) DELAY FUCTION

                                                                                              void init_timer() timer 0 initialization function

                                                                                              variable declaration

                                                                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              start of main programme

                                                                                              void main()

                                                                                              init_timer() call it timer initialization function

                                                                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                              start of while loop

                                                                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                              condition for switch1

                                                                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                              if(iltk) loop will repeat for desired time of charging

                                                                                              if(igt=1000)

                                                                                              buzzer=1 turn on buzzer if (ii==20)

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              REady_LED1=1 turn on ready indication of led1

                                                                                              else if(ii==40)

                                                                                              REady_LED1=0ii=0

                                                                                              elseREady_LED1=0

                                                                                              START_LED1=1

                                                                                              else

                                                                                              START_LED1=0

                                                                                              k1=1 buzzer=0

                                                                                              REady_LED1=0 flag1=0

                                                                                              flag5=0flag6=0

                                                                                              condition for switch2

                                                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                              REady_LED2=1 turn on ready 2 led indication

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              disp2=0

                                                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                              if(jltk)

                                                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                              elseREady_LED2=0

                                                                                              START_LED2=1

                                                                                              else START_LED2=0

                                                                                              REady_LED2=0 k2=1 buzzer=0

                                                                                              flag2=0flag7=0flag8=0

                                                                                              j=0jj=0

                                                                                              condition for switch 3

                                                                                              if(flag3==1) check swich3 pressed

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              if(disp3==1 )

                                                                                              REady_LED3=1 disp3=0

                                                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                              if(lltk)

                                                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                              elseREady_LED3=0

                                                                                              START_LED3=1

                                                                                              else START_LED3=0

                                                                                              LED2=0 k3=1 buzzer=0

                                                                                              REady_LED3=0 flag3=0

                                                                                              flag9=0flag10=0

                                                                                              l=0ll=0

                                                                                              condition for switch 4

                                                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              REady_LED4=1 disp4=0

                                                                                              if(flag11==1) check coin is pressed

                                                                                              if(flag12==1) START is pressed

                                                                                              if(mltk)

                                                                                              if(mgt1000)

                                                                                              buzzer=1 if(mm==20)

                                                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                              elseREady_LED4=0

                                                                                              START_LED4=1

                                                                                              else START_LED4=0

                                                                                              buzzer=0 k4=1

                                                                                              REady_LED4=0 flag4=0

                                                                                              flag11=0flag12=0

                                                                                              m=0mm=0

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              while(1)

                                                                                              end of main programme

                                                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                              whenever specific time the interrupt will generate control will go in following function

                                                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if(sw1_op==0 ) ready switch flag for system1

                                                                                              my_delay(10) CALL DELAY FUNCTION

                                                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                              if(flag7==1) SET THE FLAG

                                                                                              flag7=1

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                              flag9=1

                                                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                              flag11=1

                                                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if(sw2_op==0 ) fready switch flag for system2

                                                                                              my_delay (10)

                                                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                              if(flag5==1)

                                                                                              flag5=1

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                              flag9=1

                                                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                              flag11=1

                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                              if(flag7==1)

                                                                                              flag7=1

                                                                                              else

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                              flag5=1

                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                              flag11=1

                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                              if(flag7==1)

                                                                                              flag7=1

                                                                                              elseflag7=0

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                                              flag5=1

                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                              flag9=1

                                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                              if(flag6==1)

                                                                                              i++ if (igt1000) ii++

                                                                                              if (flag8==1)

                                                                                              j++ if(jgt1000) jj++

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              if (flag10==1)

                                                                                              l++ if (lgt1000) ll++

                                                                                              if (flag12==1)

                                                                                              m++ if (mgt1000) mm++

                                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 13

                                                                                              TROUBLE SHOOT

                                                                                              Troubleshoot

                                                                                              131 TROUBLE SHOOT

                                                                                              A newly assembled circuit does not work may be due to -

                                                                                              Faulty components

                                                                                              Improper soldering

                                                                                              Wrong connections

                                                                                              Also any stop in working after some period may be due to -

                                                                                              Component failure

                                                                                              Supply failure

                                                                                              Damaging of PCB

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                              proper soldering

                                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                                              Resistance measurement is also done which is known as Dry test

                                                                                              During this project work some green LEDs was not glow then we checked it

                                                                                              continuity and replace it

                                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                                              during soldering PCB We solved that problem

                                                                                              CHAPTER 14

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              ADVANTAGES OF

                                                                                              THE PROJECT

                                                                                              Advantages

                                                                                              141 ADVANTAGES OF THE PROJECT

                                                                                              Simple and hand efficient Microcontroller based system

                                                                                              Fast charging capacity

                                                                                              Simple to operate

                                                                                              Ease of mobility

                                                                                              Facilitates connectivity for 90 of cellular phones

                                                                                              Less expensive

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Reduced man power

                                                                                              Low power consumption

                                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                                              CHAPTER 15

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              DISADVANTAGES

                                                                                              OF THE PROJECT

                                                                                              Disadvantages

                                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                                              It requires mains supply to work project

                                                                                              Due to limited charging channels till now there may be a possibility that

                                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                              min

                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                              CHAPTER 16

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              APPLICATIONS OF

                                                                                              THE PROJECT

                                                                                              Application

                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                              charge for the mobile phone in any places

                                                                                              It is used for emergency charging purposes

                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                              places

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                              any location where there is a high footfall creating a large number of

                                                                                              potential users

                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                              CHAPTER 17

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              FUTURE

                                                                                              DEVELOPMENT OF

                                                                                              THE PROJECT

                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                              condition in public places

                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                              It will provide battery backup for make it portable

                                                                                              It will also provide SMS system in future

                                                                                              We can also increase the charging time by editing software of the project

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 18

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              COST ANALYSIS

                                                                                              OF THE PROJECT

                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                              1811 Component list for power supply card

                                                                                              Footprint Quantity Designators Rate

                                                                                              Resistor

                                                                                              22K 1 R2 1

                                                                                              1K 1 R1 1

                                                                                              Capacitor

                                                                                              1000uf25V 1 C5 10

                                                                                              2200uf25V 1 C1 10

                                                                                              022uf 2 C6 C2 1

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                              Table 1811 Component list for power supply card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              01uf 2 C4 C3 1

                                                                                              IC

                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                              Connector

                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                              CON PHO 3PIN 1 J1 12

                                                                                              LED3mm red 2 L1 L2 15

                                                                                              Heat sink (TO-220) 2 16

                                                                                              Total 955

                                                                                              1812 Component list for battery charger card

                                                                                              Footprint Quantity Rate

                                                                                              Capacitor

                                                                                              2200uf25V 1 1000

                                                                                              022uf 4 100

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              01uf 4 100

                                                                                              IC

                                                                                              BRIDGE W10 1 500

                                                                                              L7805CV (TO-220) 4 3200

                                                                                              Connector

                                                                                              CON PHO 2PIN 1 800

                                                                                              Relimate 2 pin 1 400

                                                                                              relimate 3 pin 4 2000

                                                                                              Heat sink (TO-220) 4 1200

                                                                                              TOTAL 9300

                                                                                              1813 Component list for Relay card

                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                              Table 1812Component list for battery charger card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                              Total 18900

                                                                                              1814Component list for controller card

                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                              Table 1813Component list for relay card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                              total 27000

                                                                                              1815 Miscellaneous material

                                                                                              Material Quantity Rate

                                                                                              electronic item

                                                                                              Transformer

                                                                                              TXR1 0-9-15 1 20000

                                                                                              0-9 1A

                                                                                              0-15 100mA

                                                                                              TXR2 0-9 1 16500

                                                                                              0-9 1A

                                                                                              Proximity switch 1 20000

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                              Table 1814Component list for microcontroller card

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Red push bottom 4 4000

                                                                                              Green push button 1 1000

                                                                                              Red led 5mm 4 800

                                                                                              Green led 5mm 4 800

                                                                                              Led holder 8 1600

                                                                                              Copper clad 2 4000

                                                                                              3 core cable 1 meter 1500

                                                                                              3 pin plug 1 3000

                                                                                              2 pin relimate wire 19 9000

                                                                                              3 pin relimate wire 5 3750

                                                                                              4 pin relimate wire 2 2000

                                                                                              mechanical items

                                                                                              Enclosure 1 25000

                                                                                              Acrylic sheet 2 X 1 30000

                                                                                              12mm cable gland 1 1000

                                                                                              Screw 3mm 33 2000

                                                                                              Screw 35mm 6 2400

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              10 mm spacers 100 1500

                                                                                              10mm insert to stud 50 10000

                                                                                              cable tie 2500

                                                                                              Total 162350

                                                                                              CHAPTER 19

                                                                                              APPENDIX

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                              Table 1815Component list for miscellaneous material

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              APPENDIX

                                                                                              191 APPENDIX

                                                                                              1911 78xx IC datasheet

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1912 W10 datasheet

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1913 4n33 IC datasheet

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                              1914 MAX 232

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1915 ULN2003a IC datasheet

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              1916 89V51RD2 IC datasheet

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 20

                                                                                              CONCLUSION

                                                                                              CONCLUSION

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              201 CONCLUSION

                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                              installed in any business premises

                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                              a high footfall creating a large number of potential users

                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                              extend low mobile phone talk time provide battery charging

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 21

                                                                                              IMAGES OF THE

                                                                                              PROJECT

                                                                                              Images of the project

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              211 IMAGES OF THE PROJECT

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Fig 216 Relay driver circuit

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                              Fig214 Power supply circuit

                                                                                              Fig215 Metal detector proximity switch

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Fig217 Microcontroller circuit

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              CHAPTER 22

                                                                                              BIBILOGRAPHY

                                                                                              BIBLIOGRAPHY

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                              221 BIBLIOGRAPHY

                                                                                              BOOKS

                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                              INTERNET LINKS

                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                              • CHAPTER 1

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                102 BATTERY CHARGER CARD

                                                                                                1021 SCHEMATIC DIAGRAM

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 48

                                                                                                Fig1021 Schematic diagram of battery charger card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                103 RELAY CARD

                                                                                                1031 SCHIMETIC DIAGRAM

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                                Fig1031 Schematic diagram of Relay card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1032 RELAY CARD LEGEND MARKING

                                                                                                1033 TOP LAYER

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                                Fig1032 Legend marking of Relay card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1034 BOTTOM LAYER

                                                                                                104 MICROCONTROLER CARD

                                                                                                1041 SCHIMETIC DIAGRAM

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                                Fig1034 Bottom layer of Relay card

                                                                                                Fig1041 Schematic diagram of microcontroller card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1042 ALL LAYERS

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                                Fig1042 All layer of microcontroller card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 11

                                                                                                INTRODUCTION

                                                                                                OF SOFTWARE

                                                                                                Keil (microVision 2)

                                                                                                Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                111 Keil (microVision 2)

                                                                                                1111 Introduction to C51 Cross Compiler

                                                                                                The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                generates object code that matches the efficiency and speed of assembly programming

                                                                                                Using a high-level language like C has many advantages over assembly language

                                                                                                programming

                                                                                                Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                Details like register allocation and addressing of the various memory types and data

                                                                                                types is managed by the compiler

                                                                                                Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                can be divided into separate functions This contributes to source code reusability as

                                                                                                well as better overall application structure

                                                                                                The ability to combine variable selection with specific operations improves program

                                                                                                readability

                                                                                                Keywords and operational functions that more nearly resemble the human thought

                                                                                                process may be used

                                                                                                Programming and program test time is drastically reduced

                                                                                                The C run-time library contains many standard routines such as formatted output

                                                                                                numeric conversions and floating-point arithmetic

                                                                                                Existing program parts can be more easily included into new programs because of

                                                                                                modular program construction techniques

                                                                                                The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                wide popular support and is easily obtained for most systems Existing program

                                                                                                investments can be quickly adapted to other processors as needed

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1112 Software Development Cycle in Keil

                                                                                                When we use the Keil Software tools the

                                                                                                project development cycle is roughly the same as

                                                                                                it is for any other software development project

                                                                                                1 Create a project select the target chip from the

                                                                                                device database and configure the tool settings

                                                                                                2 Create source files in C or assembly

                                                                                                3 Build your application with the project

                                                                                                manager

                                                                                                4 Correct errors in source files

                                                                                                5 Test the linked application A block diagram of

                                                                                                the complete 8051 tool set may best illustrate the

                                                                                                development cycle

                                                                                                112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                1121 Schematic Editor

                                                                                                In this one can develop amp design circuits for the required PCB

                                                                                                1122 Layout Editor

                                                                                                In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                Fig 111 Software development in KEIL

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1123 Library Editor

                                                                                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                1124 Auto Router

                                                                                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                the PCB tracks designed

                                                                                                1125 Cam Processor

                                                                                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                Bottom Layer Component Layer Masking Layer etc

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                Start

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 12

                                                                                                INTRODUCTION

                                                                                                OF

                                                                                                PROGRAMMING

                                                                                                Flowchart of programming

                                                                                                Program code

                                                                                                121 Flowchart

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                2

                                                                                                flag9==1

                                                                                                flag9=1

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                flag11==1

                                                                                                flag11=1 flag11=0 flag4=0

                                                                                                REady_LED4=0

                                                                                                Sw2_op (P01) ==0

                                                                                                My delay (10)

                                                                                                3 3

                                                                                                flag2=1 disp2=1 k2=0

                                                                                                3

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                4

                                                                                                flag11==1

                                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                                flag11=1

                                                                                                My delay (10)

                                                                                                flag3=1 disp3=1 k3=0

                                                                                                k1==0||k2==0||k4==0

                                                                                                Sw3_op (P02) ==0

                                                                                                5

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                flag5==1

                                                                                                5

                                                                                                flag11==1

                                                                                                flag7=1

                                                                                                flag7==1

                                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                                6

                                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                                flag11=1

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                6

                                                                                                My delay (10)

                                                                                                flag4=1 disp4=1 k4=0

                                                                                                k1==0||k2==0||k3==0 flag5==1

                                                                                                7

                                                                                                Sw4_op (P03) ==0

                                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                7

                                                                                                flag7==1

                                                                                                flag9==1

                                                                                                flag7=1

                                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                                flag9=0 flag3=0 REady_LED3=0

                                                                                                flag9=1

                                                                                                Sw5_op A(P04) ==0

                                                                                                My delay (10)

                                                                                                8

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                9

                                                                                                flag2==1

                                                                                                flag3==1

                                                                                                8

                                                                                                flag1==1

                                                                                                flag4==1 flag5=1 disp5=1

                                                                                                flag9=1 disp5=1

                                                                                                flag7=1 disp5=1

                                                                                                flag11=1 disp5=1

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                Sw6_op (P05) ==0

                                                                                                My delay (10)

                                                                                                flag2==1 ampamp flag7==1

                                                                                                flag3==1 ampamp flag9==1 9

                                                                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                flag8=1 disp6=1

                                                                                                10

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                10

                                                                                                flag4==1 ampamp flag11==1

                                                                                                flag10=1 disp6=1

                                                                                                flag12=1 disp6=1

                                                                                                flag8==1

                                                                                                flag10==1

                                                                                                11

                                                                                                flag6==1

                                                                                                i++

                                                                                                l++

                                                                                                j++

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                flag12==1

                                                                                                M++

                                                                                                11

                                                                                                Stop

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                122 Program

                                                                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                define buzzerP2_0 buzzer indication

                                                                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                sbit sw5_op=P0^4 input switch5 for coin

                                                                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                output Led for indication

                                                                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                function prototype declaration

                                                                                                void my_delay(unsigned int value) DELAY FUCTION

                                                                                                void init_timer() timer 0 initialization function

                                                                                                variable declaration

                                                                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                start of main programme

                                                                                                void main()

                                                                                                init_timer() call it timer initialization function

                                                                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                start of while loop

                                                                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                condition for switch1

                                                                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                if(iltk) loop will repeat for desired time of charging

                                                                                                if(igt=1000)

                                                                                                buzzer=1 turn on buzzer if (ii==20)

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                REady_LED1=1 turn on ready indication of led1

                                                                                                else if(ii==40)

                                                                                                REady_LED1=0ii=0

                                                                                                elseREady_LED1=0

                                                                                                START_LED1=1

                                                                                                else

                                                                                                START_LED1=0

                                                                                                k1=1 buzzer=0

                                                                                                REady_LED1=0 flag1=0

                                                                                                flag5=0flag6=0

                                                                                                condition for switch2

                                                                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                REady_LED2=1 turn on ready 2 led indication

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                disp2=0

                                                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                if(jltk)

                                                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                elseREady_LED2=0

                                                                                                START_LED2=1

                                                                                                else START_LED2=0

                                                                                                REady_LED2=0 k2=1 buzzer=0

                                                                                                flag2=0flag7=0flag8=0

                                                                                                j=0jj=0

                                                                                                condition for switch 3

                                                                                                if(flag3==1) check swich3 pressed

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                if(disp3==1 )

                                                                                                REady_LED3=1 disp3=0

                                                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                if(lltk)

                                                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                elseREady_LED3=0

                                                                                                START_LED3=1

                                                                                                else START_LED3=0

                                                                                                LED2=0 k3=1 buzzer=0

                                                                                                REady_LED3=0 flag3=0

                                                                                                flag9=0flag10=0

                                                                                                l=0ll=0

                                                                                                condition for switch 4

                                                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                REady_LED4=1 disp4=0

                                                                                                if(flag11==1) check coin is pressed

                                                                                                if(flag12==1) START is pressed

                                                                                                if(mltk)

                                                                                                if(mgt1000)

                                                                                                buzzer=1 if(mm==20)

                                                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                elseREady_LED4=0

                                                                                                START_LED4=1

                                                                                                else START_LED4=0

                                                                                                buzzer=0 k4=1

                                                                                                REady_LED4=0 flag4=0

                                                                                                flag11=0flag12=0

                                                                                                m=0mm=0

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                while(1)

                                                                                                end of main programme

                                                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                whenever specific time the interrupt will generate control will go in following function

                                                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                                                my_delay(10) CALL DELAY FUNCTION

                                                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                if(flag7==1) SET THE FLAG

                                                                                                flag7=1

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                flag9=1

                                                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                flag11=1

                                                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                                                my_delay (10)

                                                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                if(flag5==1)

                                                                                                flag5=1

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                flag9=1

                                                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                flag11=1

                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                if(flag7==1)

                                                                                                flag7=1

                                                                                                else

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                flag5=1

                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                flag11=1

                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                if(flag7==1)

                                                                                                flag7=1

                                                                                                elseflag7=0

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                                                flag5=1

                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                flag9=1

                                                                                                elseflag9=0flag3=0REady_LED3=0

                                                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                if(flag6==1)

                                                                                                i++ if (igt1000) ii++

                                                                                                if (flag8==1)

                                                                                                j++ if(jgt1000) jj++

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                if (flag10==1)

                                                                                                l++ if (lgt1000) ll++

                                                                                                if (flag12==1)

                                                                                                m++ if (mgt1000) mm++

                                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 13

                                                                                                TROUBLE SHOOT

                                                                                                Troubleshoot

                                                                                                131 TROUBLE SHOOT

                                                                                                A newly assembled circuit does not work may be due to -

                                                                                                Faulty components

                                                                                                Improper soldering

                                                                                                Wrong connections

                                                                                                Also any stop in working after some period may be due to -

                                                                                                Component failure

                                                                                                Supply failure

                                                                                                Damaging of PCB

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                proper soldering

                                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                Resistance measurement is also done which is known as Dry test

                                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                                continuity and replace it

                                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                                during soldering PCB We solved that problem

                                                                                                CHAPTER 14

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                ADVANTAGES OF

                                                                                                THE PROJECT

                                                                                                Advantages

                                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                                Simple and hand efficient Microcontroller based system

                                                                                                Fast charging capacity

                                                                                                Simple to operate

                                                                                                Ease of mobility

                                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                                Less expensive

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Reduced man power

                                                                                                Low power consumption

                                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                                CHAPTER 15

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                DISADVANTAGES

                                                                                                OF THE PROJECT

                                                                                                Disadvantages

                                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                                It requires mains supply to work project

                                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                min

                                                                                                It does not have battery backup therefore it cannot be portable

                                                                                                CHAPTER 16

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                APPLICATIONS OF

                                                                                                THE PROJECT

                                                                                                Application

                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                charge for the mobile phone in any places

                                                                                                It is used for emergency charging purposes

                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                places

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                any location where there is a high footfall creating a large number of

                                                                                                potential users

                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                CHAPTER 17

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                FUTURE

                                                                                                DEVELOPMENT OF

                                                                                                THE PROJECT

                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                condition in public places

                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                It will provide battery backup for make it portable

                                                                                                It will also provide SMS system in future

                                                                                                We can also increase the charging time by editing software of the project

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 18

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                COST ANALYSIS

                                                                                                OF THE PROJECT

                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                1811 Component list for power supply card

                                                                                                Footprint Quantity Designators Rate

                                                                                                Resistor

                                                                                                22K 1 R2 1

                                                                                                1K 1 R1 1

                                                                                                Capacitor

                                                                                                1000uf25V 1 C5 10

                                                                                                2200uf25V 1 C1 10

                                                                                                022uf 2 C6 C2 1

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                Table 1811 Component list for power supply card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                01uf 2 C4 C3 1

                                                                                                IC

                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                Connector

                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                LED3mm red 2 L1 L2 15

                                                                                                Heat sink (TO-220) 2 16

                                                                                                Total 955

                                                                                                1812 Component list for battery charger card

                                                                                                Footprint Quantity Rate

                                                                                                Capacitor

                                                                                                2200uf25V 1 1000

                                                                                                022uf 4 100

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                01uf 4 100

                                                                                                IC

                                                                                                BRIDGE W10 1 500

                                                                                                L7805CV (TO-220) 4 3200

                                                                                                Connector

                                                                                                CON PHO 2PIN 1 800

                                                                                                Relimate 2 pin 1 400

                                                                                                relimate 3 pin 4 2000

                                                                                                Heat sink (TO-220) 4 1200

                                                                                                TOTAL 9300

                                                                                                1813 Component list for Relay card

                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                Table 1812Component list for battery charger card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                Total 18900

                                                                                                1814Component list for controller card

                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                Table 1813Component list for relay card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                total 27000

                                                                                                1815 Miscellaneous material

                                                                                                Material Quantity Rate

                                                                                                electronic item

                                                                                                Transformer

                                                                                                TXR1 0-9-15 1 20000

                                                                                                0-9 1A

                                                                                                0-15 100mA

                                                                                                TXR2 0-9 1 16500

                                                                                                0-9 1A

                                                                                                Proximity switch 1 20000

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                Table 1814Component list for microcontroller card

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Red push bottom 4 4000

                                                                                                Green push button 1 1000

                                                                                                Red led 5mm 4 800

                                                                                                Green led 5mm 4 800

                                                                                                Led holder 8 1600

                                                                                                Copper clad 2 4000

                                                                                                3 core cable 1 meter 1500

                                                                                                3 pin plug 1 3000

                                                                                                2 pin relimate wire 19 9000

                                                                                                3 pin relimate wire 5 3750

                                                                                                4 pin relimate wire 2 2000

                                                                                                mechanical items

                                                                                                Enclosure 1 25000

                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                12mm cable gland 1 1000

                                                                                                Screw 3mm 33 2000

                                                                                                Screw 35mm 6 2400

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                10 mm spacers 100 1500

                                                                                                10mm insert to stud 50 10000

                                                                                                cable tie 2500

                                                                                                Total 162350

                                                                                                CHAPTER 19

                                                                                                APPENDIX

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                Table 1815Component list for miscellaneous material

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                APPENDIX

                                                                                                191 APPENDIX

                                                                                                1911 78xx IC datasheet

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1912 W10 datasheet

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1913 4n33 IC datasheet

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                1914 MAX 232

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1915 ULN2003a IC datasheet

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                1916 89V51RD2 IC datasheet

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 20

                                                                                                CONCLUSION

                                                                                                CONCLUSION

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                201 CONCLUSION

                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                installed in any business premises

                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                a high footfall creating a large number of potential users

                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 21

                                                                                                IMAGES OF THE

                                                                                                PROJECT

                                                                                                Images of the project

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                211 IMAGES OF THE PROJECT

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Fig 216 Relay driver circuit

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                Fig214 Power supply circuit

                                                                                                Fig215 Metal detector proximity switch

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Fig217 Microcontroller circuit

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                CHAPTER 22

                                                                                                BIBILOGRAPHY

                                                                                                BIBLIOGRAPHY

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                221 BIBLIOGRAPHY

                                                                                                BOOKS

                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                INTERNET LINKS

                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                • CHAPTER 1

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  103 RELAY CARD

                                                                                                  1031 SCHIMETIC DIAGRAM

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 49

                                                                                                  Fig1031 Schematic diagram of Relay card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1032 RELAY CARD LEGEND MARKING

                                                                                                  1033 TOP LAYER

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                                  Fig1032 Legend marking of Relay card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1034 BOTTOM LAYER

                                                                                                  104 MICROCONTROLER CARD

                                                                                                  1041 SCHIMETIC DIAGRAM

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                                  Fig1034 Bottom layer of Relay card

                                                                                                  Fig1041 Schematic diagram of microcontroller card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1042 ALL LAYERS

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                                  Fig1042 All layer of microcontroller card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 11

                                                                                                  INTRODUCTION

                                                                                                  OF SOFTWARE

                                                                                                  Keil (microVision 2)

                                                                                                  Eagle (Easily Applicable Graphical Layout Editor)

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  111 Keil (microVision 2)

                                                                                                  1111 Introduction to C51 Cross Compiler

                                                                                                  The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                  generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                  generates object code that matches the efficiency and speed of assembly programming

                                                                                                  Using a high-level language like C has many advantages over assembly language

                                                                                                  programming

                                                                                                  Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                  the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                  Details like register allocation and addressing of the various memory types and data

                                                                                                  types is managed by the compiler

                                                                                                  Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                  can be divided into separate functions This contributes to source code reusability as

                                                                                                  well as better overall application structure

                                                                                                  The ability to combine variable selection with specific operations improves program

                                                                                                  readability

                                                                                                  Keywords and operational functions that more nearly resemble the human thought

                                                                                                  process may be used

                                                                                                  Programming and program test time is drastically reduced

                                                                                                  The C run-time library contains many standard routines such as formatted output

                                                                                                  numeric conversions and floating-point arithmetic

                                                                                                  Existing program parts can be more easily included into new programs because of

                                                                                                  modular program construction techniques

                                                                                                  The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                  wide popular support and is easily obtained for most systems Existing program

                                                                                                  investments can be quickly adapted to other processors as needed

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1112 Software Development Cycle in Keil

                                                                                                  When we use the Keil Software tools the

                                                                                                  project development cycle is roughly the same as

                                                                                                  it is for any other software development project

                                                                                                  1 Create a project select the target chip from the

                                                                                                  device database and configure the tool settings

                                                                                                  2 Create source files in C or assembly

                                                                                                  3 Build your application with the project

                                                                                                  manager

                                                                                                  4 Correct errors in source files

                                                                                                  5 Test the linked application A block diagram of

                                                                                                  the complete 8051 tool set may best illustrate the

                                                                                                  development cycle

                                                                                                  112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                  The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                  printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                  complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                  1121 Schematic Editor

                                                                                                  In this one can develop amp design circuits for the required PCB

                                                                                                  1122 Layout Editor

                                                                                                  In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                  Fig 111 Software development in KEIL

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1123 Library Editor

                                                                                                  This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                  1124 Auto Router

                                                                                                  This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                  the PCB tracks designed

                                                                                                  1125 Cam Processor

                                                                                                  This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                  Bottom Layer Component Layer Masking Layer etc

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                                                                                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                  Start

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 12

                                                                                                  INTRODUCTION

                                                                                                  OF

                                                                                                  PROGRAMMING

                                                                                                  Flowchart of programming

                                                                                                  Program code

                                                                                                  121 Flowchart

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                                                                                                  2

                                                                                                  flag9==1

                                                                                                  flag9=1

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                  flag11==1

                                                                                                  flag11=1 flag11=0 flag4=0

                                                                                                  REady_LED4=0

                                                                                                  Sw2_op (P01) ==0

                                                                                                  My delay (10)

                                                                                                  3 3

                                                                                                  flag2=1 disp2=1 k2=0

                                                                                                  3

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                  4

                                                                                                  flag11==1

                                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                                  flag11=1

                                                                                                  My delay (10)

                                                                                                  flag3=1 disp3=1 k3=0

                                                                                                  k1==0||k2==0||k4==0

                                                                                                  Sw3_op (P02) ==0

                                                                                                  5

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                  flag5==1

                                                                                                  5

                                                                                                  flag11==1

                                                                                                  flag7=1

                                                                                                  flag7==1

                                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                                  6

                                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                                  flag11=1

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                  6

                                                                                                  My delay (10)

                                                                                                  flag4=1 disp4=1 k4=0

                                                                                                  k1==0||k2==0||k3==0 flag5==1

                                                                                                  7

                                                                                                  Sw4_op (P03) ==0

                                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                  7

                                                                                                  flag7==1

                                                                                                  flag9==1

                                                                                                  flag7=1

                                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                                  flag9=0 flag3=0 REady_LED3=0

                                                                                                  flag9=1

                                                                                                  Sw5_op A(P04) ==0

                                                                                                  My delay (10)

                                                                                                  8

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                  9

                                                                                                  flag2==1

                                                                                                  flag3==1

                                                                                                  8

                                                                                                  flag1==1

                                                                                                  flag4==1 flag5=1 disp5=1

                                                                                                  flag9=1 disp5=1

                                                                                                  flag7=1 disp5=1

                                                                                                  flag11=1 disp5=1

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                  Sw6_op (P05) ==0

                                                                                                  My delay (10)

                                                                                                  flag2==1 ampamp flag7==1

                                                                                                  flag3==1 ampamp flag9==1 9

                                                                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                  flag8=1 disp6=1

                                                                                                  10

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                  10

                                                                                                  flag4==1 ampamp flag11==1

                                                                                                  flag10=1 disp6=1

                                                                                                  flag12=1 disp6=1

                                                                                                  flag8==1

                                                                                                  flag10==1

                                                                                                  11

                                                                                                  flag6==1

                                                                                                  i++

                                                                                                  l++

                                                                                                  j++

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                  flag12==1

                                                                                                  M++

                                                                                                  11

                                                                                                  Stop

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  122 Program

                                                                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                  define buzzerP2_0 buzzer indication

                                                                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                  output Led for indication

                                                                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                  function prototype declaration

                                                                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                                                                  void init_timer() timer 0 initialization function

                                                                                                  variable declaration

                                                                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  start of main programme

                                                                                                  void main()

                                                                                                  init_timer() call it timer initialization function

                                                                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                  start of while loop

                                                                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                  condition for switch1

                                                                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                  if(iltk) loop will repeat for desired time of charging

                                                                                                  if(igt=1000)

                                                                                                  buzzer=1 turn on buzzer if (ii==20)

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  REady_LED1=1 turn on ready indication of led1

                                                                                                  else if(ii==40)

                                                                                                  REady_LED1=0ii=0

                                                                                                  elseREady_LED1=0

                                                                                                  START_LED1=1

                                                                                                  else

                                                                                                  START_LED1=0

                                                                                                  k1=1 buzzer=0

                                                                                                  REady_LED1=0 flag1=0

                                                                                                  flag5=0flag6=0

                                                                                                  condition for switch2

                                                                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                  REady_LED2=1 turn on ready 2 led indication

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  disp2=0

                                                                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                  if(jltk)

                                                                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                  elseREady_LED2=0

                                                                                                  START_LED2=1

                                                                                                  else START_LED2=0

                                                                                                  REady_LED2=0 k2=1 buzzer=0

                                                                                                  flag2=0flag7=0flag8=0

                                                                                                  j=0jj=0

                                                                                                  condition for switch 3

                                                                                                  if(flag3==1) check swich3 pressed

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  if(disp3==1 )

                                                                                                  REady_LED3=1 disp3=0

                                                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                  if(lltk)

                                                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                  elseREady_LED3=0

                                                                                                  START_LED3=1

                                                                                                  else START_LED3=0

                                                                                                  LED2=0 k3=1 buzzer=0

                                                                                                  REady_LED3=0 flag3=0

                                                                                                  flag9=0flag10=0

                                                                                                  l=0ll=0

                                                                                                  condition for switch 4

                                                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  REady_LED4=1 disp4=0

                                                                                                  if(flag11==1) check coin is pressed

                                                                                                  if(flag12==1) START is pressed

                                                                                                  if(mltk)

                                                                                                  if(mgt1000)

                                                                                                  buzzer=1 if(mm==20)

                                                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                  elseREady_LED4=0

                                                                                                  START_LED4=1

                                                                                                  else START_LED4=0

                                                                                                  buzzer=0 k4=1

                                                                                                  REady_LED4=0 flag4=0

                                                                                                  flag11=0flag12=0

                                                                                                  m=0mm=0

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  while(1)

                                                                                                  end of main programme

                                                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                  if(flag7==1) SET THE FLAG

                                                                                                  flag7=1

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                  flag9=1

                                                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                  flag11=1

                                                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                                                  my_delay (10)

                                                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                  if(flag5==1)

                                                                                                  flag5=1

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                  flag9=1

                                                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                  flag11=1

                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                  if(flag7==1)

                                                                                                  flag7=1

                                                                                                  else

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                  flag5=1

                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                  flag11=1

                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                  if(flag7==1)

                                                                                                  flag7=1

                                                                                                  elseflag7=0

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                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                                                  flag5=1

                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                  flag9=1

                                                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                  if(flag6==1)

                                                                                                  i++ if (igt1000) ii++

                                                                                                  if (flag8==1)

                                                                                                  j++ if(jgt1000) jj++

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  if (flag10==1)

                                                                                                  l++ if (lgt1000) ll++

                                                                                                  if (flag12==1)

                                                                                                  m++ if (mgt1000) mm++

                                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 13

                                                                                                  TROUBLE SHOOT

                                                                                                  Troubleshoot

                                                                                                  131 TROUBLE SHOOT

                                                                                                  A newly assembled circuit does not work may be due to -

                                                                                                  Faulty components

                                                                                                  Improper soldering

                                                                                                  Wrong connections

                                                                                                  Also any stop in working after some period may be due to -

                                                                                                  Component failure

                                                                                                  Supply failure

                                                                                                  Damaging of PCB

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                  proper soldering

                                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                                  continuity and replace it

                                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                                  during soldering PCB We solved that problem

                                                                                                  CHAPTER 14

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  ADVANTAGES OF

                                                                                                  THE PROJECT

                                                                                                  Advantages

                                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                                  Simple and hand efficient Microcontroller based system

                                                                                                  Fast charging capacity

                                                                                                  Simple to operate

                                                                                                  Ease of mobility

                                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                                  Less expensive

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Reduced man power

                                                                                                  Low power consumption

                                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                                  CHAPTER 15

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  DISADVANTAGES

                                                                                                  OF THE PROJECT

                                                                                                  Disadvantages

                                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                                  It requires mains supply to work project

                                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                  min

                                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                                  CHAPTER 16

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  APPLICATIONS OF

                                                                                                  THE PROJECT

                                                                                                  Application

                                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                                  charge for the mobile phone in any places

                                                                                                  It is used for emergency charging purposes

                                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                                  places

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                  potential users

                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                  CHAPTER 17

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  FUTURE

                                                                                                  DEVELOPMENT OF

                                                                                                  THE PROJECT

                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                  condition in public places

                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                  It will provide battery backup for make it portable

                                                                                                  It will also provide SMS system in future

                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 18

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  COST ANALYSIS

                                                                                                  OF THE PROJECT

                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                  1811 Component list for power supply card

                                                                                                  Footprint Quantity Designators Rate

                                                                                                  Resistor

                                                                                                  22K 1 R2 1

                                                                                                  1K 1 R1 1

                                                                                                  Capacitor

                                                                                                  1000uf25V 1 C5 10

                                                                                                  2200uf25V 1 C1 10

                                                                                                  022uf 2 C6 C2 1

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                  Table 1811 Component list for power supply card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  01uf 2 C4 C3 1

                                                                                                  IC

                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                  Connector

                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                  Heat sink (TO-220) 2 16

                                                                                                  Total 955

                                                                                                  1812 Component list for battery charger card

                                                                                                  Footprint Quantity Rate

                                                                                                  Capacitor

                                                                                                  2200uf25V 1 1000

                                                                                                  022uf 4 100

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  01uf 4 100

                                                                                                  IC

                                                                                                  BRIDGE W10 1 500

                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                  Connector

                                                                                                  CON PHO 2PIN 1 800

                                                                                                  Relimate 2 pin 1 400

                                                                                                  relimate 3 pin 4 2000

                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                  TOTAL 9300

                                                                                                  1813 Component list for Relay card

                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                  Table 1812Component list for battery charger card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                  Total 18900

                                                                                                  1814Component list for controller card

                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                  Table 1813Component list for relay card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                  total 27000

                                                                                                  1815 Miscellaneous material

                                                                                                  Material Quantity Rate

                                                                                                  electronic item

                                                                                                  Transformer

                                                                                                  TXR1 0-9-15 1 20000

                                                                                                  0-9 1A

                                                                                                  0-15 100mA

                                                                                                  TXR2 0-9 1 16500

                                                                                                  0-9 1A

                                                                                                  Proximity switch 1 20000

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                  Table 1814Component list for microcontroller card

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Red push bottom 4 4000

                                                                                                  Green push button 1 1000

                                                                                                  Red led 5mm 4 800

                                                                                                  Green led 5mm 4 800

                                                                                                  Led holder 8 1600

                                                                                                  Copper clad 2 4000

                                                                                                  3 core cable 1 meter 1500

                                                                                                  3 pin plug 1 3000

                                                                                                  2 pin relimate wire 19 9000

                                                                                                  3 pin relimate wire 5 3750

                                                                                                  4 pin relimate wire 2 2000

                                                                                                  mechanical items

                                                                                                  Enclosure 1 25000

                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                  12mm cable gland 1 1000

                                                                                                  Screw 3mm 33 2000

                                                                                                  Screw 35mm 6 2400

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  10 mm spacers 100 1500

                                                                                                  10mm insert to stud 50 10000

                                                                                                  cable tie 2500

                                                                                                  Total 162350

                                                                                                  CHAPTER 19

                                                                                                  APPENDIX

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  APPENDIX

                                                                                                  191 APPENDIX

                                                                                                  1911 78xx IC datasheet

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1912 W10 datasheet

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1913 4n33 IC datasheet

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                  1914 MAX 232

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1915 ULN2003a IC datasheet

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 20

                                                                                                  CONCLUSION

                                                                                                  CONCLUSION

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  201 CONCLUSION

                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                  installed in any business premises

                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                  a high footfall creating a large number of potential users

                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 21

                                                                                                  IMAGES OF THE

                                                                                                  PROJECT

                                                                                                  Images of the project

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Fig 216 Relay driver circuit

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                  Fig214 Power supply circuit

                                                                                                  Fig215 Metal detector proximity switch

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Fig217 Microcontroller circuit

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  CHAPTER 22

                                                                                                  BIBILOGRAPHY

                                                                                                  BIBLIOGRAPHY

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                  221 BIBLIOGRAPHY

                                                                                                  BOOKS

                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                  INTERNET LINKS

                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                  • CHAPTER 1

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1032 RELAY CARD LEGEND MARKING

                                                                                                    1033 TOP LAYER

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 50

                                                                                                    Fig1032 Legend marking of Relay card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1034 BOTTOM LAYER

                                                                                                    104 MICROCONTROLER CARD

                                                                                                    1041 SCHIMETIC DIAGRAM

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                                    Fig1034 Bottom layer of Relay card

                                                                                                    Fig1041 Schematic diagram of microcontroller card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1042 ALL LAYERS

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                                    Fig1042 All layer of microcontroller card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 11

                                                                                                    INTRODUCTION

                                                                                                    OF SOFTWARE

                                                                                                    Keil (microVision 2)

                                                                                                    Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    111 Keil (microVision 2)

                                                                                                    1111 Introduction to C51 Cross Compiler

                                                                                                    The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                    generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                    generates object code that matches the efficiency and speed of assembly programming

                                                                                                    Using a high-level language like C has many advantages over assembly language

                                                                                                    programming

                                                                                                    Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                    the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                    Details like register allocation and addressing of the various memory types and data

                                                                                                    types is managed by the compiler

                                                                                                    Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                    can be divided into separate functions This contributes to source code reusability as

                                                                                                    well as better overall application structure

                                                                                                    The ability to combine variable selection with specific operations improves program

                                                                                                    readability

                                                                                                    Keywords and operational functions that more nearly resemble the human thought

                                                                                                    process may be used

                                                                                                    Programming and program test time is drastically reduced

                                                                                                    The C run-time library contains many standard routines such as formatted output

                                                                                                    numeric conversions and floating-point arithmetic

                                                                                                    Existing program parts can be more easily included into new programs because of

                                                                                                    modular program construction techniques

                                                                                                    The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                    wide popular support and is easily obtained for most systems Existing program

                                                                                                    investments can be quickly adapted to other processors as needed

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1112 Software Development Cycle in Keil

                                                                                                    When we use the Keil Software tools the

                                                                                                    project development cycle is roughly the same as

                                                                                                    it is for any other software development project

                                                                                                    1 Create a project select the target chip from the

                                                                                                    device database and configure the tool settings

                                                                                                    2 Create source files in C or assembly

                                                                                                    3 Build your application with the project

                                                                                                    manager

                                                                                                    4 Correct errors in source files

                                                                                                    5 Test the linked application A block diagram of

                                                                                                    the complete 8051 tool set may best illustrate the

                                                                                                    development cycle

                                                                                                    112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                    The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                    printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                    complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                    1121 Schematic Editor

                                                                                                    In this one can develop amp design circuits for the required PCB

                                                                                                    1122 Layout Editor

                                                                                                    In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                    Fig 111 Software development in KEIL

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1123 Library Editor

                                                                                                    This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                    1124 Auto Router

                                                                                                    This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                    the PCB tracks designed

                                                                                                    1125 Cam Processor

                                                                                                    This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                    Bottom Layer Component Layer Masking Layer etc

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                    TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                    Start

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 12

                                                                                                    INTRODUCTION

                                                                                                    OF

                                                                                                    PROGRAMMING

                                                                                                    Flowchart of programming

                                                                                                    Program code

                                                                                                    121 Flowchart

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                    2

                                                                                                    flag9==1

                                                                                                    flag9=1

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                    flag11==1

                                                                                                    flag11=1 flag11=0 flag4=0

                                                                                                    REady_LED4=0

                                                                                                    Sw2_op (P01) ==0

                                                                                                    My delay (10)

                                                                                                    3 3

                                                                                                    flag2=1 disp2=1 k2=0

                                                                                                    3

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                    4

                                                                                                    flag11==1

                                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                                    flag11=1

                                                                                                    My delay (10)

                                                                                                    flag3=1 disp3=1 k3=0

                                                                                                    k1==0||k2==0||k4==0

                                                                                                    Sw3_op (P02) ==0

                                                                                                    5

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                    flag5==1

                                                                                                    5

                                                                                                    flag11==1

                                                                                                    flag7=1

                                                                                                    flag7==1

                                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                                    6

                                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                                    flag11=1

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                    6

                                                                                                    My delay (10)

                                                                                                    flag4=1 disp4=1 k4=0

                                                                                                    k1==0||k2==0||k3==0 flag5==1

                                                                                                    7

                                                                                                    Sw4_op (P03) ==0

                                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                    7

                                                                                                    flag7==1

                                                                                                    flag9==1

                                                                                                    flag7=1

                                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                                    flag9=0 flag3=0 REady_LED3=0

                                                                                                    flag9=1

                                                                                                    Sw5_op A(P04) ==0

                                                                                                    My delay (10)

                                                                                                    8

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                    9

                                                                                                    flag2==1

                                                                                                    flag3==1

                                                                                                    8

                                                                                                    flag1==1

                                                                                                    flag4==1 flag5=1 disp5=1

                                                                                                    flag9=1 disp5=1

                                                                                                    flag7=1 disp5=1

                                                                                                    flag11=1 disp5=1

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                    Sw6_op (P05) ==0

                                                                                                    My delay (10)

                                                                                                    flag2==1 ampamp flag7==1

                                                                                                    flag3==1 ampamp flag9==1 9

                                                                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                    flag8=1 disp6=1

                                                                                                    10

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                    10

                                                                                                    flag4==1 ampamp flag11==1

                                                                                                    flag10=1 disp6=1

                                                                                                    flag12=1 disp6=1

                                                                                                    flag8==1

                                                                                                    flag10==1

                                                                                                    11

                                                                                                    flag6==1

                                                                                                    i++

                                                                                                    l++

                                                                                                    j++

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                    flag12==1

                                                                                                    M++

                                                                                                    11

                                                                                                    Stop

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    122 Program

                                                                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                    define buzzerP2_0 buzzer indication

                                                                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                    output Led for indication

                                                                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                    function prototype declaration

                                                                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                                                                    void init_timer() timer 0 initialization function

                                                                                                    variable declaration

                                                                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    start of main programme

                                                                                                    void main()

                                                                                                    init_timer() call it timer initialization function

                                                                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                    start of while loop

                                                                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                    condition for switch1

                                                                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                    if(iltk) loop will repeat for desired time of charging

                                                                                                    if(igt=1000)

                                                                                                    buzzer=1 turn on buzzer if (ii==20)

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    REady_LED1=1 turn on ready indication of led1

                                                                                                    else if(ii==40)

                                                                                                    REady_LED1=0ii=0

                                                                                                    elseREady_LED1=0

                                                                                                    START_LED1=1

                                                                                                    else

                                                                                                    START_LED1=0

                                                                                                    k1=1 buzzer=0

                                                                                                    REady_LED1=0 flag1=0

                                                                                                    flag5=0flag6=0

                                                                                                    condition for switch2

                                                                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                    REady_LED2=1 turn on ready 2 led indication

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    disp2=0

                                                                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                    if(jltk)

                                                                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                    elseREady_LED2=0

                                                                                                    START_LED2=1

                                                                                                    else START_LED2=0

                                                                                                    REady_LED2=0 k2=1 buzzer=0

                                                                                                    flag2=0flag7=0flag8=0

                                                                                                    j=0jj=0

                                                                                                    condition for switch 3

                                                                                                    if(flag3==1) check swich3 pressed

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    if(disp3==1 )

                                                                                                    REady_LED3=1 disp3=0

                                                                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                    if(lltk)

                                                                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                    elseREady_LED3=0

                                                                                                    START_LED3=1

                                                                                                    else START_LED3=0

                                                                                                    LED2=0 k3=1 buzzer=0

                                                                                                    REady_LED3=0 flag3=0

                                                                                                    flag9=0flag10=0

                                                                                                    l=0ll=0

                                                                                                    condition for switch 4

                                                                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    REady_LED4=1 disp4=0

                                                                                                    if(flag11==1) check coin is pressed

                                                                                                    if(flag12==1) START is pressed

                                                                                                    if(mltk)

                                                                                                    if(mgt1000)

                                                                                                    buzzer=1 if(mm==20)

                                                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                    elseREady_LED4=0

                                                                                                    START_LED4=1

                                                                                                    else START_LED4=0

                                                                                                    buzzer=0 k4=1

                                                                                                    REady_LED4=0 flag4=0

                                                                                                    flag11=0flag12=0

                                                                                                    m=0mm=0

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    while(1)

                                                                                                    end of main programme

                                                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                    if(flag7==1) SET THE FLAG

                                                                                                    flag7=1

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                    flag9=1

                                                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                    flag11=1

                                                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                                                    my_delay (10)

                                                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                    if(flag5==1)

                                                                                                    flag5=1

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                    flag9=1

                                                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                    flag11=1

                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                    if(flag7==1)

                                                                                                    flag7=1

                                                                                                    else

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                    flag5=1

                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                    flag11=1

                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                    if(flag7==1)

                                                                                                    flag7=1

                                                                                                    elseflag7=0

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                                                    flag5=1

                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                    flag9=1

                                                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                    if(flag6==1)

                                                                                                    i++ if (igt1000) ii++

                                                                                                    if (flag8==1)

                                                                                                    j++ if(jgt1000) jj++

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    if (flag10==1)

                                                                                                    l++ if (lgt1000) ll++

                                                                                                    if (flag12==1)

                                                                                                    m++ if (mgt1000) mm++

                                                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 13

                                                                                                    TROUBLE SHOOT

                                                                                                    Troubleshoot

                                                                                                    131 TROUBLE SHOOT

                                                                                                    A newly assembled circuit does not work may be due to -

                                                                                                    Faulty components

                                                                                                    Improper soldering

                                                                                                    Wrong connections

                                                                                                    Also any stop in working after some period may be due to -

                                                                                                    Component failure

                                                                                                    Supply failure

                                                                                                    Damaging of PCB

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                    proper soldering

                                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                                    continuity and replace it

                                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                                    during soldering PCB We solved that problem

                                                                                                    CHAPTER 14

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    ADVANTAGES OF

                                                                                                    THE PROJECT

                                                                                                    Advantages

                                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                                    Simple and hand efficient Microcontroller based system

                                                                                                    Fast charging capacity

                                                                                                    Simple to operate

                                                                                                    Ease of mobility

                                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                                    Less expensive

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Reduced man power

                                                                                                    Low power consumption

                                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                                    CHAPTER 15

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    DISADVANTAGES

                                                                                                    OF THE PROJECT

                                                                                                    Disadvantages

                                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                                    It requires mains supply to work project

                                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                    min

                                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                                    CHAPTER 16

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    APPLICATIONS OF

                                                                                                    THE PROJECT

                                                                                                    Application

                                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                                    charge for the mobile phone in any places

                                                                                                    It is used for emergency charging purposes

                                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                                    places

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                                    any location where there is a high footfall creating a large number of

                                                                                                    potential users

                                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                                    CHAPTER 17

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    FUTURE

                                                                                                    DEVELOPMENT OF

                                                                                                    THE PROJECT

                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                    condition in public places

                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                    It will provide battery backup for make it portable

                                                                                                    It will also provide SMS system in future

                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 18

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    COST ANALYSIS

                                                                                                    OF THE PROJECT

                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                    1811 Component list for power supply card

                                                                                                    Footprint Quantity Designators Rate

                                                                                                    Resistor

                                                                                                    22K 1 R2 1

                                                                                                    1K 1 R1 1

                                                                                                    Capacitor

                                                                                                    1000uf25V 1 C5 10

                                                                                                    2200uf25V 1 C1 10

                                                                                                    022uf 2 C6 C2 1

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                    Table 1811 Component list for power supply card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    01uf 2 C4 C3 1

                                                                                                    IC

                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                    Connector

                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                    Heat sink (TO-220) 2 16

                                                                                                    Total 955

                                                                                                    1812 Component list for battery charger card

                                                                                                    Footprint Quantity Rate

                                                                                                    Capacitor

                                                                                                    2200uf25V 1 1000

                                                                                                    022uf 4 100

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    01uf 4 100

                                                                                                    IC

                                                                                                    BRIDGE W10 1 500

                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                    Connector

                                                                                                    CON PHO 2PIN 1 800

                                                                                                    Relimate 2 pin 1 400

                                                                                                    relimate 3 pin 4 2000

                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                    TOTAL 9300

                                                                                                    1813 Component list for Relay card

                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                    Table 1812Component list for battery charger card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                    Total 18900

                                                                                                    1814Component list for controller card

                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                    Table 1813Component list for relay card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                    total 27000

                                                                                                    1815 Miscellaneous material

                                                                                                    Material Quantity Rate

                                                                                                    electronic item

                                                                                                    Transformer

                                                                                                    TXR1 0-9-15 1 20000

                                                                                                    0-9 1A

                                                                                                    0-15 100mA

                                                                                                    TXR2 0-9 1 16500

                                                                                                    0-9 1A

                                                                                                    Proximity switch 1 20000

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                    Table 1814Component list for microcontroller card

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Red push bottom 4 4000

                                                                                                    Green push button 1 1000

                                                                                                    Red led 5mm 4 800

                                                                                                    Green led 5mm 4 800

                                                                                                    Led holder 8 1600

                                                                                                    Copper clad 2 4000

                                                                                                    3 core cable 1 meter 1500

                                                                                                    3 pin plug 1 3000

                                                                                                    2 pin relimate wire 19 9000

                                                                                                    3 pin relimate wire 5 3750

                                                                                                    4 pin relimate wire 2 2000

                                                                                                    mechanical items

                                                                                                    Enclosure 1 25000

                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                    12mm cable gland 1 1000

                                                                                                    Screw 3mm 33 2000

                                                                                                    Screw 35mm 6 2400

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    10 mm spacers 100 1500

                                                                                                    10mm insert to stud 50 10000

                                                                                                    cable tie 2500

                                                                                                    Total 162350

                                                                                                    CHAPTER 19

                                                                                                    APPENDIX

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    APPENDIX

                                                                                                    191 APPENDIX

                                                                                                    1911 78xx IC datasheet

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1912 W10 datasheet

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1913 4n33 IC datasheet

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                    1914 MAX 232

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1915 ULN2003a IC datasheet

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 20

                                                                                                    CONCLUSION

                                                                                                    CONCLUSION

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    201 CONCLUSION

                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                    installed in any business premises

                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                    a high footfall creating a large number of potential users

                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 21

                                                                                                    IMAGES OF THE

                                                                                                    PROJECT

                                                                                                    Images of the project

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Fig 216 Relay driver circuit

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                    Fig214 Power supply circuit

                                                                                                    Fig215 Metal detector proximity switch

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Fig217 Microcontroller circuit

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    CHAPTER 22

                                                                                                    BIBILOGRAPHY

                                                                                                    BIBLIOGRAPHY

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                    221 BIBLIOGRAPHY

                                                                                                    BOOKS

                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                    INTERNET LINKS

                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                    • CHAPTER 1

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1034 BOTTOM LAYER

                                                                                                      104 MICROCONTROLER CARD

                                                                                                      1041 SCHIMETIC DIAGRAM

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 51

                                                                                                      Fig1034 Bottom layer of Relay card

                                                                                                      Fig1041 Schematic diagram of microcontroller card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1042 ALL LAYERS

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                                      Fig1042 All layer of microcontroller card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 11

                                                                                                      INTRODUCTION

                                                                                                      OF SOFTWARE

                                                                                                      Keil (microVision 2)

                                                                                                      Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      111 Keil (microVision 2)

                                                                                                      1111 Introduction to C51 Cross Compiler

                                                                                                      The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                      generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                      generates object code that matches the efficiency and speed of assembly programming

                                                                                                      Using a high-level language like C has many advantages over assembly language

                                                                                                      programming

                                                                                                      Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                      the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                      Details like register allocation and addressing of the various memory types and data

                                                                                                      types is managed by the compiler

                                                                                                      Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                      can be divided into separate functions This contributes to source code reusability as

                                                                                                      well as better overall application structure

                                                                                                      The ability to combine variable selection with specific operations improves program

                                                                                                      readability

                                                                                                      Keywords and operational functions that more nearly resemble the human thought

                                                                                                      process may be used

                                                                                                      Programming and program test time is drastically reduced

                                                                                                      The C run-time library contains many standard routines such as formatted output

                                                                                                      numeric conversions and floating-point arithmetic

                                                                                                      Existing program parts can be more easily included into new programs because of

                                                                                                      modular program construction techniques

                                                                                                      The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                      wide popular support and is easily obtained for most systems Existing program

                                                                                                      investments can be quickly adapted to other processors as needed

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1112 Software Development Cycle in Keil

                                                                                                      When we use the Keil Software tools the

                                                                                                      project development cycle is roughly the same as

                                                                                                      it is for any other software development project

                                                                                                      1 Create a project select the target chip from the

                                                                                                      device database and configure the tool settings

                                                                                                      2 Create source files in C or assembly

                                                                                                      3 Build your application with the project

                                                                                                      manager

                                                                                                      4 Correct errors in source files

                                                                                                      5 Test the linked application A block diagram of

                                                                                                      the complete 8051 tool set may best illustrate the

                                                                                                      development cycle

                                                                                                      112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                      The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                      printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                      complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                      1121 Schematic Editor

                                                                                                      In this one can develop amp design circuits for the required PCB

                                                                                                      1122 Layout Editor

                                                                                                      In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                      Fig 111 Software development in KEIL

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1123 Library Editor

                                                                                                      This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                      1124 Auto Router

                                                                                                      This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                      the PCB tracks designed

                                                                                                      1125 Cam Processor

                                                                                                      This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                      Bottom Layer Component Layer Masking Layer etc

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                      TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                      Start

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 12

                                                                                                      INTRODUCTION

                                                                                                      OF

                                                                                                      PROGRAMMING

                                                                                                      Flowchart of programming

                                                                                                      Program code

                                                                                                      121 Flowchart

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                      2

                                                                                                      flag9==1

                                                                                                      flag9=1

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                      flag11==1

                                                                                                      flag11=1 flag11=0 flag4=0

                                                                                                      REady_LED4=0

                                                                                                      Sw2_op (P01) ==0

                                                                                                      My delay (10)

                                                                                                      3 3

                                                                                                      flag2=1 disp2=1 k2=0

                                                                                                      3

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                      4

                                                                                                      flag11==1

                                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                                      flag11=1

                                                                                                      My delay (10)

                                                                                                      flag3=1 disp3=1 k3=0

                                                                                                      k1==0||k2==0||k4==0

                                                                                                      Sw3_op (P02) ==0

                                                                                                      5

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                      flag5==1

                                                                                                      5

                                                                                                      flag11==1

                                                                                                      flag7=1

                                                                                                      flag7==1

                                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                                      6

                                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                                      flag11=1

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                      6

                                                                                                      My delay (10)

                                                                                                      flag4=1 disp4=1 k4=0

                                                                                                      k1==0||k2==0||k3==0 flag5==1

                                                                                                      7

                                                                                                      Sw4_op (P03) ==0

                                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                      7

                                                                                                      flag7==1

                                                                                                      flag9==1

                                                                                                      flag7=1

                                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                                      flag9=0 flag3=0 REady_LED3=0

                                                                                                      flag9=1

                                                                                                      Sw5_op A(P04) ==0

                                                                                                      My delay (10)

                                                                                                      8

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                      9

                                                                                                      flag2==1

                                                                                                      flag3==1

                                                                                                      8

                                                                                                      flag1==1

                                                                                                      flag4==1 flag5=1 disp5=1

                                                                                                      flag9=1 disp5=1

                                                                                                      flag7=1 disp5=1

                                                                                                      flag11=1 disp5=1

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                      Sw6_op (P05) ==0

                                                                                                      My delay (10)

                                                                                                      flag2==1 ampamp flag7==1

                                                                                                      flag3==1 ampamp flag9==1 9

                                                                                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                      flag8=1 disp6=1

                                                                                                      10

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                      10

                                                                                                      flag4==1 ampamp flag11==1

                                                                                                      flag10=1 disp6=1

                                                                                                      flag12=1 disp6=1

                                                                                                      flag8==1

                                                                                                      flag10==1

                                                                                                      11

                                                                                                      flag6==1

                                                                                                      i++

                                                                                                      l++

                                                                                                      j++

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                      flag12==1

                                                                                                      M++

                                                                                                      11

                                                                                                      Stop

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      122 Program

                                                                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                      define buzzerP2_0 buzzer indication

                                                                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                      output Led for indication

                                                                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                      function prototype declaration

                                                                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                                                                      void init_timer() timer 0 initialization function

                                                                                                      variable declaration

                                                                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      start of main programme

                                                                                                      void main()

                                                                                                      init_timer() call it timer initialization function

                                                                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                      start of while loop

                                                                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                      condition for switch1

                                                                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                      if(iltk) loop will repeat for desired time of charging

                                                                                                      if(igt=1000)

                                                                                                      buzzer=1 turn on buzzer if (ii==20)

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      REady_LED1=1 turn on ready indication of led1

                                                                                                      else if(ii==40)

                                                                                                      REady_LED1=0ii=0

                                                                                                      elseREady_LED1=0

                                                                                                      START_LED1=1

                                                                                                      else

                                                                                                      START_LED1=0

                                                                                                      k1=1 buzzer=0

                                                                                                      REady_LED1=0 flag1=0

                                                                                                      flag5=0flag6=0

                                                                                                      condition for switch2

                                                                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                      REady_LED2=1 turn on ready 2 led indication

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      disp2=0

                                                                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                      if(jltk)

                                                                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                      elseREady_LED2=0

                                                                                                      START_LED2=1

                                                                                                      else START_LED2=0

                                                                                                      REady_LED2=0 k2=1 buzzer=0

                                                                                                      flag2=0flag7=0flag8=0

                                                                                                      j=0jj=0

                                                                                                      condition for switch 3

                                                                                                      if(flag3==1) check swich3 pressed

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      if(disp3==1 )

                                                                                                      REady_LED3=1 disp3=0

                                                                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                      if(lltk)

                                                                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                      elseREady_LED3=0

                                                                                                      START_LED3=1

                                                                                                      else START_LED3=0

                                                                                                      LED2=0 k3=1 buzzer=0

                                                                                                      REady_LED3=0 flag3=0

                                                                                                      flag9=0flag10=0

                                                                                                      l=0ll=0

                                                                                                      condition for switch 4

                                                                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      REady_LED4=1 disp4=0

                                                                                                      if(flag11==1) check coin is pressed

                                                                                                      if(flag12==1) START is pressed

                                                                                                      if(mltk)

                                                                                                      if(mgt1000)

                                                                                                      buzzer=1 if(mm==20)

                                                                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                      elseREady_LED4=0

                                                                                                      START_LED4=1

                                                                                                      else START_LED4=0

                                                                                                      buzzer=0 k4=1

                                                                                                      REady_LED4=0 flag4=0

                                                                                                      flag11=0flag12=0

                                                                                                      m=0mm=0

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      while(1)

                                                                                                      end of main programme

                                                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                      if(flag7==1) SET THE FLAG

                                                                                                      flag7=1

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                      flag9=1

                                                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                      flag11=1

                                                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                                                      my_delay (10)

                                                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                      if(flag5==1)

                                                                                                      flag5=1

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                      flag9=1

                                                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                      flag11=1

                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                      if(flag7==1)

                                                                                                      flag7=1

                                                                                                      else

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                      flag5=1

                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                      flag11=1

                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                      if(flag7==1)

                                                                                                      flag7=1

                                                                                                      elseflag7=0

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                                                      flag5=1

                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                      flag9=1

                                                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                      if(flag6==1)

                                                                                                      i++ if (igt1000) ii++

                                                                                                      if (flag8==1)

                                                                                                      j++ if(jgt1000) jj++

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      if (flag10==1)

                                                                                                      l++ if (lgt1000) ll++

                                                                                                      if (flag12==1)

                                                                                                      m++ if (mgt1000) mm++

                                                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 13

                                                                                                      TROUBLE SHOOT

                                                                                                      Troubleshoot

                                                                                                      131 TROUBLE SHOOT

                                                                                                      A newly assembled circuit does not work may be due to -

                                                                                                      Faulty components

                                                                                                      Improper soldering

                                                                                                      Wrong connections

                                                                                                      Also any stop in working after some period may be due to -

                                                                                                      Component failure

                                                                                                      Supply failure

                                                                                                      Damaging of PCB

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                      proper soldering

                                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                                      continuity and replace it

                                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                                      during soldering PCB We solved that problem

                                                                                                      CHAPTER 14

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      ADVANTAGES OF

                                                                                                      THE PROJECT

                                                                                                      Advantages

                                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                                      Simple and hand efficient Microcontroller based system

                                                                                                      Fast charging capacity

                                                                                                      Simple to operate

                                                                                                      Ease of mobility

                                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                                      Less expensive

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Reduced man power

                                                                                                      Low power consumption

                                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                                      CHAPTER 15

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      DISADVANTAGES

                                                                                                      OF THE PROJECT

                                                                                                      Disadvantages

                                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                                      It requires mains supply to work project

                                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                      min

                                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                                      CHAPTER 16

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      APPLICATIONS OF

                                                                                                      THE PROJECT

                                                                                                      Application

                                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                                      charge for the mobile phone in any places

                                                                                                      It is used for emergency charging purposes

                                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                                      places

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                                      any location where there is a high footfall creating a large number of

                                                                                                      potential users

                                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                                      CHAPTER 17

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      FUTURE

                                                                                                      DEVELOPMENT OF

                                                                                                      THE PROJECT

                                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                                      condition in public places

                                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                      It will provide battery backup for make it portable

                                                                                                      It will also provide SMS system in future

                                                                                                      We can also increase the charging time by editing software of the project

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                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 18

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      COST ANALYSIS

                                                                                                      OF THE PROJECT

                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                      1811 Component list for power supply card

                                                                                                      Footprint Quantity Designators Rate

                                                                                                      Resistor

                                                                                                      22K 1 R2 1

                                                                                                      1K 1 R1 1

                                                                                                      Capacitor

                                                                                                      1000uf25V 1 C5 10

                                                                                                      2200uf25V 1 C1 10

                                                                                                      022uf 2 C6 C2 1

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                      Table 1811 Component list for power supply card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      01uf 2 C4 C3 1

                                                                                                      IC

                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                      Connector

                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                      Heat sink (TO-220) 2 16

                                                                                                      Total 955

                                                                                                      1812 Component list for battery charger card

                                                                                                      Footprint Quantity Rate

                                                                                                      Capacitor

                                                                                                      2200uf25V 1 1000

                                                                                                      022uf 4 100

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      01uf 4 100

                                                                                                      IC

                                                                                                      BRIDGE W10 1 500

                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                      Connector

                                                                                                      CON PHO 2PIN 1 800

                                                                                                      Relimate 2 pin 1 400

                                                                                                      relimate 3 pin 4 2000

                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                      TOTAL 9300

                                                                                                      1813 Component list for Relay card

                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                      Table 1812Component list for battery charger card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                      Total 18900

                                                                                                      1814Component list for controller card

                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                      Table 1813Component list for relay card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                      total 27000

                                                                                                      1815 Miscellaneous material

                                                                                                      Material Quantity Rate

                                                                                                      electronic item

                                                                                                      Transformer

                                                                                                      TXR1 0-9-15 1 20000

                                                                                                      0-9 1A

                                                                                                      0-15 100mA

                                                                                                      TXR2 0-9 1 16500

                                                                                                      0-9 1A

                                                                                                      Proximity switch 1 20000

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                      Table 1814Component list for microcontroller card

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Red push bottom 4 4000

                                                                                                      Green push button 1 1000

                                                                                                      Red led 5mm 4 800

                                                                                                      Green led 5mm 4 800

                                                                                                      Led holder 8 1600

                                                                                                      Copper clad 2 4000

                                                                                                      3 core cable 1 meter 1500

                                                                                                      3 pin plug 1 3000

                                                                                                      2 pin relimate wire 19 9000

                                                                                                      3 pin relimate wire 5 3750

                                                                                                      4 pin relimate wire 2 2000

                                                                                                      mechanical items

                                                                                                      Enclosure 1 25000

                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                      12mm cable gland 1 1000

                                                                                                      Screw 3mm 33 2000

                                                                                                      Screw 35mm 6 2400

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      10 mm spacers 100 1500

                                                                                                      10mm insert to stud 50 10000

                                                                                                      cable tie 2500

                                                                                                      Total 162350

                                                                                                      CHAPTER 19

                                                                                                      APPENDIX

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      APPENDIX

                                                                                                      191 APPENDIX

                                                                                                      1911 78xx IC datasheet

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1912 W10 datasheet

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1913 4n33 IC datasheet

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                      1914 MAX 232

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1915 ULN2003a IC datasheet

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 20

                                                                                                      CONCLUSION

                                                                                                      CONCLUSION

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      201 CONCLUSION

                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                      installed in any business premises

                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                      a high footfall creating a large number of potential users

                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 21

                                                                                                      IMAGES OF THE

                                                                                                      PROJECT

                                                                                                      Images of the project

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Fig 216 Relay driver circuit

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                      Fig214 Power supply circuit

                                                                                                      Fig215 Metal detector proximity switch

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Fig217 Microcontroller circuit

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      CHAPTER 22

                                                                                                      BIBILOGRAPHY

                                                                                                      BIBLIOGRAPHY

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                      221 BIBLIOGRAPHY

                                                                                                      BOOKS

                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                      INTERNET LINKS

                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                      • CHAPTER 1

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1042 ALL LAYERS

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 52

                                                                                                        Fig1042 All layer of microcontroller card

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 11

                                                                                                        INTRODUCTION

                                                                                                        OF SOFTWARE

                                                                                                        Keil (microVision 2)

                                                                                                        Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 53

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        111 Keil (microVision 2)

                                                                                                        1111 Introduction to C51 Cross Compiler

                                                                                                        The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                        generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                        generates object code that matches the efficiency and speed of assembly programming

                                                                                                        Using a high-level language like C has many advantages over assembly language

                                                                                                        programming

                                                                                                        Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                        the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                        Details like register allocation and addressing of the various memory types and data

                                                                                                        types is managed by the compiler

                                                                                                        Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                        can be divided into separate functions This contributes to source code reusability as

                                                                                                        well as better overall application structure

                                                                                                        The ability to combine variable selection with specific operations improves program

                                                                                                        readability

                                                                                                        Keywords and operational functions that more nearly resemble the human thought

                                                                                                        process may be used

                                                                                                        Programming and program test time is drastically reduced

                                                                                                        The C run-time library contains many standard routines such as formatted output

                                                                                                        numeric conversions and floating-point arithmetic

                                                                                                        Existing program parts can be more easily included into new programs because of

                                                                                                        modular program construction techniques

                                                                                                        The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                        wide popular support and is easily obtained for most systems Existing program

                                                                                                        investments can be quickly adapted to other processors as needed

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1112 Software Development Cycle in Keil

                                                                                                        When we use the Keil Software tools the

                                                                                                        project development cycle is roughly the same as

                                                                                                        it is for any other software development project

                                                                                                        1 Create a project select the target chip from the

                                                                                                        device database and configure the tool settings

                                                                                                        2 Create source files in C or assembly

                                                                                                        3 Build your application with the project

                                                                                                        manager

                                                                                                        4 Correct errors in source files

                                                                                                        5 Test the linked application A block diagram of

                                                                                                        the complete 8051 tool set may best illustrate the

                                                                                                        development cycle

                                                                                                        112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                        The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                        printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                        complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                        1121 Schematic Editor

                                                                                                        In this one can develop amp design circuits for the required PCB

                                                                                                        1122 Layout Editor

                                                                                                        In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                        Fig 111 Software development in KEIL

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1123 Library Editor

                                                                                                        This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                        1124 Auto Router

                                                                                                        This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                        the PCB tracks designed

                                                                                                        1125 Cam Processor

                                                                                                        This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                        Bottom Layer Component Layer Masking Layer etc

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                        TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                        Start

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 12

                                                                                                        INTRODUCTION

                                                                                                        OF

                                                                                                        PROGRAMMING

                                                                                                        Flowchart of programming

                                                                                                        Program code

                                                                                                        121 Flowchart

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                        2

                                                                                                        flag9==1

                                                                                                        flag9=1

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                        flag11==1

                                                                                                        flag11=1 flag11=0 flag4=0

                                                                                                        REady_LED4=0

                                                                                                        Sw2_op (P01) ==0

                                                                                                        My delay (10)

                                                                                                        3 3

                                                                                                        flag2=1 disp2=1 k2=0

                                                                                                        3

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                        4

                                                                                                        flag11==1

                                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                                        flag11=1

                                                                                                        My delay (10)

                                                                                                        flag3=1 disp3=1 k3=0

                                                                                                        k1==0||k2==0||k4==0

                                                                                                        Sw3_op (P02) ==0

                                                                                                        5

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                        flag5==1

                                                                                                        5

                                                                                                        flag11==1

                                                                                                        flag7=1

                                                                                                        flag7==1

                                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                                        6

                                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                                        flag11=1

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                        6

                                                                                                        My delay (10)

                                                                                                        flag4=1 disp4=1 k4=0

                                                                                                        k1==0||k2==0||k3==0 flag5==1

                                                                                                        7

                                                                                                        Sw4_op (P03) ==0

                                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                        7

                                                                                                        flag7==1

                                                                                                        flag9==1

                                                                                                        flag7=1

                                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                                        flag9=0 flag3=0 REady_LED3=0

                                                                                                        flag9=1

                                                                                                        Sw5_op A(P04) ==0

                                                                                                        My delay (10)

                                                                                                        8

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                        9

                                                                                                        flag2==1

                                                                                                        flag3==1

                                                                                                        8

                                                                                                        flag1==1

                                                                                                        flag4==1 flag5=1 disp5=1

                                                                                                        flag9=1 disp5=1

                                                                                                        flag7=1 disp5=1

                                                                                                        flag11=1 disp5=1

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                        Sw6_op (P05) ==0

                                                                                                        My delay (10)

                                                                                                        flag2==1 ampamp flag7==1

                                                                                                        flag3==1 ampamp flag9==1 9

                                                                                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                        flag8=1 disp6=1

                                                                                                        10

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                        10

                                                                                                        flag4==1 ampamp flag11==1

                                                                                                        flag10=1 disp6=1

                                                                                                        flag12=1 disp6=1

                                                                                                        flag8==1

                                                                                                        flag10==1

                                                                                                        11

                                                                                                        flag6==1

                                                                                                        i++

                                                                                                        l++

                                                                                                        j++

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                        flag12==1

                                                                                                        M++

                                                                                                        11

                                                                                                        Stop

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        122 Program

                                                                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                        define buzzerP2_0 buzzer indication

                                                                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                        output Led for indication

                                                                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                        function prototype declaration

                                                                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                                                                        void init_timer() timer 0 initialization function

                                                                                                        variable declaration

                                                                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        start of main programme

                                                                                                        void main()

                                                                                                        init_timer() call it timer initialization function

                                                                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                        start of while loop

                                                                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                        condition for switch1

                                                                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                        if(iltk) loop will repeat for desired time of charging

                                                                                                        if(igt=1000)

                                                                                                        buzzer=1 turn on buzzer if (ii==20)

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        REady_LED1=1 turn on ready indication of led1

                                                                                                        else if(ii==40)

                                                                                                        REady_LED1=0ii=0

                                                                                                        elseREady_LED1=0

                                                                                                        START_LED1=1

                                                                                                        else

                                                                                                        START_LED1=0

                                                                                                        k1=1 buzzer=0

                                                                                                        REady_LED1=0 flag1=0

                                                                                                        flag5=0flag6=0

                                                                                                        condition for switch2

                                                                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                        REady_LED2=1 turn on ready 2 led indication

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        disp2=0

                                                                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                        if(jltk)

                                                                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                        elseREady_LED2=0

                                                                                                        START_LED2=1

                                                                                                        else START_LED2=0

                                                                                                        REady_LED2=0 k2=1 buzzer=0

                                                                                                        flag2=0flag7=0flag8=0

                                                                                                        j=0jj=0

                                                                                                        condition for switch 3

                                                                                                        if(flag3==1) check swich3 pressed

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        if(disp3==1 )

                                                                                                        REady_LED3=1 disp3=0

                                                                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                        if(lltk)

                                                                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                        elseREady_LED3=0

                                                                                                        START_LED3=1

                                                                                                        else START_LED3=0

                                                                                                        LED2=0 k3=1 buzzer=0

                                                                                                        REady_LED3=0 flag3=0

                                                                                                        flag9=0flag10=0

                                                                                                        l=0ll=0

                                                                                                        condition for switch 4

                                                                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        REady_LED4=1 disp4=0

                                                                                                        if(flag11==1) check coin is pressed

                                                                                                        if(flag12==1) START is pressed

                                                                                                        if(mltk)

                                                                                                        if(mgt1000)

                                                                                                        buzzer=1 if(mm==20)

                                                                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                        elseREady_LED4=0

                                                                                                        START_LED4=1

                                                                                                        else START_LED4=0

                                                                                                        buzzer=0 k4=1

                                                                                                        REady_LED4=0 flag4=0

                                                                                                        flag11=0flag12=0

                                                                                                        m=0mm=0

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        while(1)

                                                                                                        end of main programme

                                                                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                        whenever specific time the interrupt will generate control will go in following function

                                                                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if(sw1_op==0 ) ready switch flag for system1

                                                                                                        my_delay(10) CALL DELAY FUNCTION

                                                                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                        if(flag7==1) SET THE FLAG

                                                                                                        flag7=1

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                        flag9=1

                                                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                        flag11=1

                                                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                                                        my_delay (10)

                                                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                        if(flag5==1)

                                                                                                        flag5=1

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                        flag9=1

                                                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                        flag11=1

                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                        if(flag7==1)

                                                                                                        flag7=1

                                                                                                        else

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                        flag5=1

                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                        flag11=1

                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                        if(flag7==1)

                                                                                                        flag7=1

                                                                                                        elseflag7=0

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                                                        flag5=1

                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                        flag9=1

                                                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                        if(flag6==1)

                                                                                                        i++ if (igt1000) ii++

                                                                                                        if (flag8==1)

                                                                                                        j++ if(jgt1000) jj++

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        if (flag10==1)

                                                                                                        l++ if (lgt1000) ll++

                                                                                                        if (flag12==1)

                                                                                                        m++ if (mgt1000) mm++

                                                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 13

                                                                                                        TROUBLE SHOOT

                                                                                                        Troubleshoot

                                                                                                        131 TROUBLE SHOOT

                                                                                                        A newly assembled circuit does not work may be due to -

                                                                                                        Faulty components

                                                                                                        Improper soldering

                                                                                                        Wrong connections

                                                                                                        Also any stop in working after some period may be due to -

                                                                                                        Component failure

                                                                                                        Supply failure

                                                                                                        Damaging of PCB

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                        proper soldering

                                                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                        Resistance measurement is also done which is known as Dry test

                                                                                                        During this project work some green LEDs was not glow then we checked it

                                                                                                        continuity and replace it

                                                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                                                        during soldering PCB We solved that problem

                                                                                                        CHAPTER 14

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        ADVANTAGES OF

                                                                                                        THE PROJECT

                                                                                                        Advantages

                                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                                        Simple and hand efficient Microcontroller based system

                                                                                                        Fast charging capacity

                                                                                                        Simple to operate

                                                                                                        Ease of mobility

                                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                                        Less expensive

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Reduced man power

                                                                                                        Low power consumption

                                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                                        CHAPTER 15

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        DISADVANTAGES

                                                                                                        OF THE PROJECT

                                                                                                        Disadvantages

                                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                                        It requires mains supply to work project

                                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                        min

                                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                                        CHAPTER 16

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        APPLICATIONS OF

                                                                                                        THE PROJECT

                                                                                                        Application

                                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                                        charge for the mobile phone in any places

                                                                                                        It is used for emergency charging purposes

                                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                                        places

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                                        any location where there is a high footfall creating a large number of

                                                                                                        potential users

                                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                                        CHAPTER 17

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        FUTURE

                                                                                                        DEVELOPMENT OF

                                                                                                        THE PROJECT

                                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                                        condition in public places

                                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                        It will provide battery backup for make it portable

                                                                                                        It will also provide SMS system in future

                                                                                                        We can also increase the charging time by editing software of the project

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 18

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        COST ANALYSIS

                                                                                                        OF THE PROJECT

                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                        1811 Component list for power supply card

                                                                                                        Footprint Quantity Designators Rate

                                                                                                        Resistor

                                                                                                        22K 1 R2 1

                                                                                                        1K 1 R1 1

                                                                                                        Capacitor

                                                                                                        1000uf25V 1 C5 10

                                                                                                        2200uf25V 1 C1 10

                                                                                                        022uf 2 C6 C2 1

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                        Table 1811 Component list for power supply card

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        01uf 2 C4 C3 1

                                                                                                        IC

                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                        Connector

                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                        Heat sink (TO-220) 2 16

                                                                                                        Total 955

                                                                                                        1812 Component list for battery charger card

                                                                                                        Footprint Quantity Rate

                                                                                                        Capacitor

                                                                                                        2200uf25V 1 1000

                                                                                                        022uf 4 100

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        01uf 4 100

                                                                                                        IC

                                                                                                        BRIDGE W10 1 500

                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                        Connector

                                                                                                        CON PHO 2PIN 1 800

                                                                                                        Relimate 2 pin 1 400

                                                                                                        relimate 3 pin 4 2000

                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                        TOTAL 9300

                                                                                                        1813 Component list for Relay card

                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                        Table 1812Component list for battery charger card

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                        Total 18900

                                                                                                        1814Component list for controller card

                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                        Table 1813Component list for relay card

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                        total 27000

                                                                                                        1815 Miscellaneous material

                                                                                                        Material Quantity Rate

                                                                                                        electronic item

                                                                                                        Transformer

                                                                                                        TXR1 0-9-15 1 20000

                                                                                                        0-9 1A

                                                                                                        0-15 100mA

                                                                                                        TXR2 0-9 1 16500

                                                                                                        0-9 1A

                                                                                                        Proximity switch 1 20000

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                        Table 1814Component list for microcontroller card

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Red push bottom 4 4000

                                                                                                        Green push button 1 1000

                                                                                                        Red led 5mm 4 800

                                                                                                        Green led 5mm 4 800

                                                                                                        Led holder 8 1600

                                                                                                        Copper clad 2 4000

                                                                                                        3 core cable 1 meter 1500

                                                                                                        3 pin plug 1 3000

                                                                                                        2 pin relimate wire 19 9000

                                                                                                        3 pin relimate wire 5 3750

                                                                                                        4 pin relimate wire 2 2000

                                                                                                        mechanical items

                                                                                                        Enclosure 1 25000

                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                        12mm cable gland 1 1000

                                                                                                        Screw 3mm 33 2000

                                                                                                        Screw 35mm 6 2400

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        10 mm spacers 100 1500

                                                                                                        10mm insert to stud 50 10000

                                                                                                        cable tie 2500

                                                                                                        Total 162350

                                                                                                        CHAPTER 19

                                                                                                        APPENDIX

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        APPENDIX

                                                                                                        191 APPENDIX

                                                                                                        1911 78xx IC datasheet

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1912 W10 datasheet

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1913 4n33 IC datasheet

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                        1914 MAX 232

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1915 ULN2003a IC datasheet

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        1916 89V51RD2 IC datasheet

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 20

                                                                                                        CONCLUSION

                                                                                                        CONCLUSION

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        201 CONCLUSION

                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                        installed in any business premises

                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                        a high footfall creating a large number of potential users

                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 21

                                                                                                        IMAGES OF THE

                                                                                                        PROJECT

                                                                                                        Images of the project

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Fig 216 Relay driver circuit

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                        Fig214 Power supply circuit

                                                                                                        Fig215 Metal detector proximity switch

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Fig217 Microcontroller circuit

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        Fig228 coin operated mobile battery charger project presentation

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        CHAPTER 22

                                                                                                        BIBILOGRAPHY

                                                                                                        BIBLIOGRAPHY

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                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                        221 BIBLIOGRAPHY

                                                                                                        BOOKS

                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                        INTERNET LINKS

                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                        • CHAPTER 1

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 11

                                                                                                          INTRODUCTION

                                                                                                          OF SOFTWARE

                                                                                                          Keil (microVision 2)

                                                                                                          Eagle (Easily Applicable Graphical Layout Editor)

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                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          111 Keil (microVision 2)

                                                                                                          1111 Introduction to C51 Cross Compiler

                                                                                                          The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                          generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                          generates object code that matches the efficiency and speed of assembly programming

                                                                                                          Using a high-level language like C has many advantages over assembly language

                                                                                                          programming

                                                                                                          Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                          the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                          Details like register allocation and addressing of the various memory types and data

                                                                                                          types is managed by the compiler

                                                                                                          Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                          can be divided into separate functions This contributes to source code reusability as

                                                                                                          well as better overall application structure

                                                                                                          The ability to combine variable selection with specific operations improves program

                                                                                                          readability

                                                                                                          Keywords and operational functions that more nearly resemble the human thought

                                                                                                          process may be used

                                                                                                          Programming and program test time is drastically reduced

                                                                                                          The C run-time library contains many standard routines such as formatted output

                                                                                                          numeric conversions and floating-point arithmetic

                                                                                                          Existing program parts can be more easily included into new programs because of

                                                                                                          modular program construction techniques

                                                                                                          The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                          wide popular support and is easily obtained for most systems Existing program

                                                                                                          investments can be quickly adapted to other processors as needed

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1112 Software Development Cycle in Keil

                                                                                                          When we use the Keil Software tools the

                                                                                                          project development cycle is roughly the same as

                                                                                                          it is for any other software development project

                                                                                                          1 Create a project select the target chip from the

                                                                                                          device database and configure the tool settings

                                                                                                          2 Create source files in C or assembly

                                                                                                          3 Build your application with the project

                                                                                                          manager

                                                                                                          4 Correct errors in source files

                                                                                                          5 Test the linked application A block diagram of

                                                                                                          the complete 8051 tool set may best illustrate the

                                                                                                          development cycle

                                                                                                          112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                          The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                          printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                          complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                          1121 Schematic Editor

                                                                                                          In this one can develop amp design circuits for the required PCB

                                                                                                          1122 Layout Editor

                                                                                                          In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                          Fig 111 Software development in KEIL

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1123 Library Editor

                                                                                                          This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                          1124 Auto Router

                                                                                                          This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                          the PCB tracks designed

                                                                                                          1125 Cam Processor

                                                                                                          This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                          Bottom Layer Component Layer Masking Layer etc

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                          TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                          Start

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 12

                                                                                                          INTRODUCTION

                                                                                                          OF

                                                                                                          PROGRAMMING

                                                                                                          Flowchart of programming

                                                                                                          Program code

                                                                                                          121 Flowchart

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                          2

                                                                                                          flag9==1

                                                                                                          flag9=1

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                          flag11==1

                                                                                                          flag11=1 flag11=0 flag4=0

                                                                                                          REady_LED4=0

                                                                                                          Sw2_op (P01) ==0

                                                                                                          My delay (10)

                                                                                                          3 3

                                                                                                          flag2=1 disp2=1 k2=0

                                                                                                          3

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

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                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                          4

                                                                                                          flag11==1

                                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                                          flag11=1

                                                                                                          My delay (10)

                                                                                                          flag3=1 disp3=1 k3=0

                                                                                                          k1==0||k2==0||k4==0

                                                                                                          Sw3_op (P02) ==0

                                                                                                          5

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                          flag5==1

                                                                                                          5

                                                                                                          flag11==1

                                                                                                          flag7=1

                                                                                                          flag7==1

                                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                                          6

                                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                                          flag11=1

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                          6

                                                                                                          My delay (10)

                                                                                                          flag4=1 disp4=1 k4=0

                                                                                                          k1==0||k2==0||k3==0 flag5==1

                                                                                                          7

                                                                                                          Sw4_op (P03) ==0

                                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                          7

                                                                                                          flag7==1

                                                                                                          flag9==1

                                                                                                          flag7=1

                                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                                          flag9=0 flag3=0 REady_LED3=0

                                                                                                          flag9=1

                                                                                                          Sw5_op A(P04) ==0

                                                                                                          My delay (10)

                                                                                                          8

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                          9

                                                                                                          flag2==1

                                                                                                          flag3==1

                                                                                                          8

                                                                                                          flag1==1

                                                                                                          flag4==1 flag5=1 disp5=1

                                                                                                          flag9=1 disp5=1

                                                                                                          flag7=1 disp5=1

                                                                                                          flag11=1 disp5=1

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                          Sw6_op (P05) ==0

                                                                                                          My delay (10)

                                                                                                          flag2==1 ampamp flag7==1

                                                                                                          flag3==1 ampamp flag9==1 9

                                                                                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                          flag8=1 disp6=1

                                                                                                          10

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                          10

                                                                                                          flag4==1 ampamp flag11==1

                                                                                                          flag10=1 disp6=1

                                                                                                          flag12=1 disp6=1

                                                                                                          flag8==1

                                                                                                          flag10==1

                                                                                                          11

                                                                                                          flag6==1

                                                                                                          i++

                                                                                                          l++

                                                                                                          j++

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                          flag12==1

                                                                                                          M++

                                                                                                          11

                                                                                                          Stop

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          122 Program

                                                                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                          define buzzerP2_0 buzzer indication

                                                                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                          output Led for indication

                                                                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                          function prototype declaration

                                                                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                                                                          void init_timer() timer 0 initialization function

                                                                                                          variable declaration

                                                                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          start of main programme

                                                                                                          void main()

                                                                                                          init_timer() call it timer initialization function

                                                                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                          start of while loop

                                                                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                          condition for switch1

                                                                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                          if(iltk) loop will repeat for desired time of charging

                                                                                                          if(igt=1000)

                                                                                                          buzzer=1 turn on buzzer if (ii==20)

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          REady_LED1=1 turn on ready indication of led1

                                                                                                          else if(ii==40)

                                                                                                          REady_LED1=0ii=0

                                                                                                          elseREady_LED1=0

                                                                                                          START_LED1=1

                                                                                                          else

                                                                                                          START_LED1=0

                                                                                                          k1=1 buzzer=0

                                                                                                          REady_LED1=0 flag1=0

                                                                                                          flag5=0flag6=0

                                                                                                          condition for switch2

                                                                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                          REady_LED2=1 turn on ready 2 led indication

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          disp2=0

                                                                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                          if(jltk)

                                                                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                          elseREady_LED2=0

                                                                                                          START_LED2=1

                                                                                                          else START_LED2=0

                                                                                                          REady_LED2=0 k2=1 buzzer=0

                                                                                                          flag2=0flag7=0flag8=0

                                                                                                          j=0jj=0

                                                                                                          condition for switch 3

                                                                                                          if(flag3==1) check swich3 pressed

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          if(disp3==1 )

                                                                                                          REady_LED3=1 disp3=0

                                                                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                          if(lltk)

                                                                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                          elseREady_LED3=0

                                                                                                          START_LED3=1

                                                                                                          else START_LED3=0

                                                                                                          LED2=0 k3=1 buzzer=0

                                                                                                          REady_LED3=0 flag3=0

                                                                                                          flag9=0flag10=0

                                                                                                          l=0ll=0

                                                                                                          condition for switch 4

                                                                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          REady_LED4=1 disp4=0

                                                                                                          if(flag11==1) check coin is pressed

                                                                                                          if(flag12==1) START is pressed

                                                                                                          if(mltk)

                                                                                                          if(mgt1000)

                                                                                                          buzzer=1 if(mm==20)

                                                                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                          elseREady_LED4=0

                                                                                                          START_LED4=1

                                                                                                          else START_LED4=0

                                                                                                          buzzer=0 k4=1

                                                                                                          REady_LED4=0 flag4=0

                                                                                                          flag11=0flag12=0

                                                                                                          m=0mm=0

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          while(1)

                                                                                                          end of main programme

                                                                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                          whenever specific time the interrupt will generate control will go in following function

                                                                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if(sw1_op==0 ) ready switch flag for system1

                                                                                                          my_delay(10) CALL DELAY FUNCTION

                                                                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                          if(flag7==1) SET THE FLAG

                                                                                                          flag7=1

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                          flag9=1

                                                                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                          flag11=1

                                                                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if(sw2_op==0 ) fready switch flag for system2

                                                                                                          my_delay (10)

                                                                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                          if(flag5==1)

                                                                                                          flag5=1

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                          flag9=1

                                                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                          flag11=1

                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                          if(flag7==1)

                                                                                                          flag7=1

                                                                                                          else

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                          flag5=1

                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                          flag11=1

                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                          if(flag7==1)

                                                                                                          flag7=1

                                                                                                          elseflag7=0

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                                                          flag5=1

                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                          flag9=1

                                                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                          if(flag6==1)

                                                                                                          i++ if (igt1000) ii++

                                                                                                          if (flag8==1)

                                                                                                          j++ if(jgt1000) jj++

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          if (flag10==1)

                                                                                                          l++ if (lgt1000) ll++

                                                                                                          if (flag12==1)

                                                                                                          m++ if (mgt1000) mm++

                                                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 13

                                                                                                          TROUBLE SHOOT

                                                                                                          Troubleshoot

                                                                                                          131 TROUBLE SHOOT

                                                                                                          A newly assembled circuit does not work may be due to -

                                                                                                          Faulty components

                                                                                                          Improper soldering

                                                                                                          Wrong connections

                                                                                                          Also any stop in working after some period may be due to -

                                                                                                          Component failure

                                                                                                          Supply failure

                                                                                                          Damaging of PCB

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                          proper soldering

                                                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                          Resistance measurement is also done which is known as Dry test

                                                                                                          During this project work some green LEDs was not glow then we checked it

                                                                                                          continuity and replace it

                                                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                                                          during soldering PCB We solved that problem

                                                                                                          CHAPTER 14

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          ADVANTAGES OF

                                                                                                          THE PROJECT

                                                                                                          Advantages

                                                                                                          141 ADVANTAGES OF THE PROJECT

                                                                                                          Simple and hand efficient Microcontroller based system

                                                                                                          Fast charging capacity

                                                                                                          Simple to operate

                                                                                                          Ease of mobility

                                                                                                          Facilitates connectivity for 90 of cellular phones

                                                                                                          Less expensive

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Reduced man power

                                                                                                          Low power consumption

                                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                                          CHAPTER 15

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          DISADVANTAGES

                                                                                                          OF THE PROJECT

                                                                                                          Disadvantages

                                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                                          It requires mains supply to work project

                                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                          min

                                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                                          CHAPTER 16

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          APPLICATIONS OF

                                                                                                          THE PROJECT

                                                                                                          Application

                                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                                          charge for the mobile phone in any places

                                                                                                          It is used for emergency charging purposes

                                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                                          places

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                                          any location where there is a high footfall creating a large number of

                                                                                                          potential users

                                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                                          CHAPTER 17

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          FUTURE

                                                                                                          DEVELOPMENT OF

                                                                                                          THE PROJECT

                                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                                          condition in public places

                                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                          It will provide battery backup for make it portable

                                                                                                          It will also provide SMS system in future

                                                                                                          We can also increase the charging time by editing software of the project

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 18

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          COST ANALYSIS

                                                                                                          OF THE PROJECT

                                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                                          1811 Component list for power supply card

                                                                                                          Footprint Quantity Designators Rate

                                                                                                          Resistor

                                                                                                          22K 1 R2 1

                                                                                                          1K 1 R1 1

                                                                                                          Capacitor

                                                                                                          1000uf25V 1 C5 10

                                                                                                          2200uf25V 1 C1 10

                                                                                                          022uf 2 C6 C2 1

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                          Table 1811 Component list for power supply card

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          01uf 2 C4 C3 1

                                                                                                          IC

                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                          Connector

                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                          Heat sink (TO-220) 2 16

                                                                                                          Total 955

                                                                                                          1812 Component list for battery charger card

                                                                                                          Footprint Quantity Rate

                                                                                                          Capacitor

                                                                                                          2200uf25V 1 1000

                                                                                                          022uf 4 100

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          01uf 4 100

                                                                                                          IC

                                                                                                          BRIDGE W10 1 500

                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                          Connector

                                                                                                          CON PHO 2PIN 1 800

                                                                                                          Relimate 2 pin 1 400

                                                                                                          relimate 3 pin 4 2000

                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                          TOTAL 9300

                                                                                                          1813 Component list for Relay card

                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                          Table 1812Component list for battery charger card

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                          Total 18900

                                                                                                          1814Component list for controller card

                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                          Table 1813Component list for relay card

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                          total 27000

                                                                                                          1815 Miscellaneous material

                                                                                                          Material Quantity Rate

                                                                                                          electronic item

                                                                                                          Transformer

                                                                                                          TXR1 0-9-15 1 20000

                                                                                                          0-9 1A

                                                                                                          0-15 100mA

                                                                                                          TXR2 0-9 1 16500

                                                                                                          0-9 1A

                                                                                                          Proximity switch 1 20000

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                          Table 1814Component list for microcontroller card

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Red push bottom 4 4000

                                                                                                          Green push button 1 1000

                                                                                                          Red led 5mm 4 800

                                                                                                          Green led 5mm 4 800

                                                                                                          Led holder 8 1600

                                                                                                          Copper clad 2 4000

                                                                                                          3 core cable 1 meter 1500

                                                                                                          3 pin plug 1 3000

                                                                                                          2 pin relimate wire 19 9000

                                                                                                          3 pin relimate wire 5 3750

                                                                                                          4 pin relimate wire 2 2000

                                                                                                          mechanical items

                                                                                                          Enclosure 1 25000

                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                          12mm cable gland 1 1000

                                                                                                          Screw 3mm 33 2000

                                                                                                          Screw 35mm 6 2400

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          10 mm spacers 100 1500

                                                                                                          10mm insert to stud 50 10000

                                                                                                          cable tie 2500

                                                                                                          Total 162350

                                                                                                          CHAPTER 19

                                                                                                          APPENDIX

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          APPENDIX

                                                                                                          191 APPENDIX

                                                                                                          1911 78xx IC datasheet

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1912 W10 datasheet

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1913 4n33 IC datasheet

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                          1914 MAX 232

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1915 ULN2003a IC datasheet

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 20

                                                                                                          CONCLUSION

                                                                                                          CONCLUSION

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          201 CONCLUSION

                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                          installed in any business premises

                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                          a high footfall creating a large number of potential users

                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 21

                                                                                                          IMAGES OF THE

                                                                                                          PROJECT

                                                                                                          Images of the project

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Fig 216 Relay driver circuit

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                          Fig214 Power supply circuit

                                                                                                          Fig215 Metal detector proximity switch

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Fig217 Microcontroller circuit

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          CHAPTER 22

                                                                                                          BIBILOGRAPHY

                                                                                                          BIBLIOGRAPHY

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                          221 BIBLIOGRAPHY

                                                                                                          BOOKS

                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                          INTERNET LINKS

                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                          • CHAPTER 1

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            111 Keil (microVision 2)

                                                                                                            1111 Introduction to C51 Cross Compiler

                                                                                                            The Keil C51 Cross Compiler is an ANSI C Compiler that is written specifically to

                                                                                                            generate fast compact code for the 8051 microcontroller family The C51 Compiler

                                                                                                            generates object code that matches the efficiency and speed of assembly programming

                                                                                                            Using a high-level language like C has many advantages over assembly language

                                                                                                            programming

                                                                                                            Knowledge of the processor instruction set is not required Rudimentary knowledge of

                                                                                                            the memory structure of the 8051 CPU is desirable (but not necessary)

                                                                                                            Details like register allocation and addressing of the various memory types and data

                                                                                                            types is managed by the compiler

                                                                                                            Programs get a formal structure (which is imposed by the C programming language) and

                                                                                                            can be divided into separate functions This contributes to source code reusability as

                                                                                                            well as better overall application structure

                                                                                                            The ability to combine variable selection with specific operations improves program

                                                                                                            readability

                                                                                                            Keywords and operational functions that more nearly resemble the human thought

                                                                                                            process may be used

                                                                                                            Programming and program test time is drastically reduced

                                                                                                            The C run-time library contains many standard routines such as formatted output

                                                                                                            numeric conversions and floating-point arithmetic

                                                                                                            Existing program parts can be more easily included into new programs because of

                                                                                                            modular program construction techniques

                                                                                                            The language C is a very portable language (based on the ANSI standard) that enjoys

                                                                                                            wide popular support and is easily obtained for most systems Existing program

                                                                                                            investments can be quickly adapted to other processors as needed

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 54

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1112 Software Development Cycle in Keil

                                                                                                            When we use the Keil Software tools the

                                                                                                            project development cycle is roughly the same as

                                                                                                            it is for any other software development project

                                                                                                            1 Create a project select the target chip from the

                                                                                                            device database and configure the tool settings

                                                                                                            2 Create source files in C or assembly

                                                                                                            3 Build your application with the project

                                                                                                            manager

                                                                                                            4 Correct errors in source files

                                                                                                            5 Test the linked application A block diagram of

                                                                                                            the complete 8051 tool set may best illustrate the

                                                                                                            development cycle

                                                                                                            112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                            The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                            printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                            complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                            1121 Schematic Editor

                                                                                                            In this one can develop amp design circuits for the required PCB

                                                                                                            1122 Layout Editor

                                                                                                            In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                            Fig 111 Software development in KEIL

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1123 Library Editor

                                                                                                            This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                            1124 Auto Router

                                                                                                            This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                            the PCB tracks designed

                                                                                                            1125 Cam Processor

                                                                                                            This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                            Bottom Layer Component Layer Masking Layer etc

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                            TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                            Start

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 12

                                                                                                            INTRODUCTION

                                                                                                            OF

                                                                                                            PROGRAMMING

                                                                                                            Flowchart of programming

                                                                                                            Program code

                                                                                                            121 Flowchart

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                            2

                                                                                                            flag9==1

                                                                                                            flag9=1

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                            flag11==1

                                                                                                            flag11=1 flag11=0 flag4=0

                                                                                                            REady_LED4=0

                                                                                                            Sw2_op (P01) ==0

                                                                                                            My delay (10)

                                                                                                            3 3

                                                                                                            flag2=1 disp2=1 k2=0

                                                                                                            3

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                            4

                                                                                                            flag11==1

                                                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                                                            flag11=1

                                                                                                            My delay (10)

                                                                                                            flag3=1 disp3=1 k3=0

                                                                                                            k1==0||k2==0||k4==0

                                                                                                            Sw3_op (P02) ==0

                                                                                                            5

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                            flag5==1

                                                                                                            5

                                                                                                            flag11==1

                                                                                                            flag7=1

                                                                                                            flag7==1

                                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                                            6

                                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                                                            flag11=1

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                            6

                                                                                                            My delay (10)

                                                                                                            flag4=1 disp4=1 k4=0

                                                                                                            k1==0||k2==0||k3==0 flag5==1

                                                                                                            7

                                                                                                            Sw4_op (P03) ==0

                                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                            7

                                                                                                            flag7==1

                                                                                                            flag9==1

                                                                                                            flag7=1

                                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                                            flag9=0 flag3=0 REady_LED3=0

                                                                                                            flag9=1

                                                                                                            Sw5_op A(P04) ==0

                                                                                                            My delay (10)

                                                                                                            8

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                            9

                                                                                                            flag2==1

                                                                                                            flag3==1

                                                                                                            8

                                                                                                            flag1==1

                                                                                                            flag4==1 flag5=1 disp5=1

                                                                                                            flag9=1 disp5=1

                                                                                                            flag7=1 disp5=1

                                                                                                            flag11=1 disp5=1

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                            Sw6_op (P05) ==0

                                                                                                            My delay (10)

                                                                                                            flag2==1 ampamp flag7==1

                                                                                                            flag3==1 ampamp flag9==1 9

                                                                                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                            flag8=1 disp6=1

                                                                                                            10

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                            10

                                                                                                            flag4==1 ampamp flag11==1

                                                                                                            flag10=1 disp6=1

                                                                                                            flag12=1 disp6=1

                                                                                                            flag8==1

                                                                                                            flag10==1

                                                                                                            11

                                                                                                            flag6==1

                                                                                                            i++

                                                                                                            l++

                                                                                                            j++

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                            flag12==1

                                                                                                            M++

                                                                                                            11

                                                                                                            Stop

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            122 Program

                                                                                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                            define buzzerP2_0 buzzer indication

                                                                                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                            sbit sw5_op=P0^4 input switch5 for coin

                                                                                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                            output Led for indication

                                                                                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                            function prototype declaration

                                                                                                            void my_delay(unsigned int value) DELAY FUCTION

                                                                                                            void init_timer() timer 0 initialization function

                                                                                                            variable declaration

                                                                                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            start of main programme

                                                                                                            void main()

                                                                                                            init_timer() call it timer initialization function

                                                                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                            start of while loop

                                                                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                            condition for switch1

                                                                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                            if(iltk) loop will repeat for desired time of charging

                                                                                                            if(igt=1000)

                                                                                                            buzzer=1 turn on buzzer if (ii==20)

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            REady_LED1=1 turn on ready indication of led1

                                                                                                            else if(ii==40)

                                                                                                            REady_LED1=0ii=0

                                                                                                            elseREady_LED1=0

                                                                                                            START_LED1=1

                                                                                                            else

                                                                                                            START_LED1=0

                                                                                                            k1=1 buzzer=0

                                                                                                            REady_LED1=0 flag1=0

                                                                                                            flag5=0flag6=0

                                                                                                            condition for switch2

                                                                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                            REady_LED2=1 turn on ready 2 led indication

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            disp2=0

                                                                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                            if(jltk)

                                                                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                            elseREady_LED2=0

                                                                                                            START_LED2=1

                                                                                                            else START_LED2=0

                                                                                                            REady_LED2=0 k2=1 buzzer=0

                                                                                                            flag2=0flag7=0flag8=0

                                                                                                            j=0jj=0

                                                                                                            condition for switch 3

                                                                                                            if(flag3==1) check swich3 pressed

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            if(disp3==1 )

                                                                                                            REady_LED3=1 disp3=0

                                                                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                            if(lltk)

                                                                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                            elseREady_LED3=0

                                                                                                            START_LED3=1

                                                                                                            else START_LED3=0

                                                                                                            LED2=0 k3=1 buzzer=0

                                                                                                            REady_LED3=0 flag3=0

                                                                                                            flag9=0flag10=0

                                                                                                            l=0ll=0

                                                                                                            condition for switch 4

                                                                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            REady_LED4=1 disp4=0

                                                                                                            if(flag11==1) check coin is pressed

                                                                                                            if(flag12==1) START is pressed

                                                                                                            if(mltk)

                                                                                                            if(mgt1000)

                                                                                                            buzzer=1 if(mm==20)

                                                                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                            elseREady_LED4=0

                                                                                                            START_LED4=1

                                                                                                            else START_LED4=0

                                                                                                            buzzer=0 k4=1

                                                                                                            REady_LED4=0 flag4=0

                                                                                                            flag11=0flag12=0

                                                                                                            m=0mm=0

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            while(1)

                                                                                                            end of main programme

                                                                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                            whenever specific time the interrupt will generate control will go in following function

                                                                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if(sw1_op==0 ) ready switch flag for system1

                                                                                                            my_delay(10) CALL DELAY FUNCTION

                                                                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                            if(flag7==1) SET THE FLAG

                                                                                                            flag7=1

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                            flag9=1

                                                                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                            flag11=1

                                                                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if(sw2_op==0 ) fready switch flag for system2

                                                                                                            my_delay (10)

                                                                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                            if(flag5==1)

                                                                                                            flag5=1

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                            flag9=1

                                                                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                            flag11=1

                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                            if(flag7==1)

                                                                                                            flag7=1

                                                                                                            else

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                            flag5=1

                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                            flag11=1

                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                            if(flag7==1)

                                                                                                            flag7=1

                                                                                                            elseflag7=0

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                                                            flag5=1

                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                            flag9=1

                                                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                            if(flag6==1)

                                                                                                            i++ if (igt1000) ii++

                                                                                                            if (flag8==1)

                                                                                                            j++ if(jgt1000) jj++

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            if (flag10==1)

                                                                                                            l++ if (lgt1000) ll++

                                                                                                            if (flag12==1)

                                                                                                            m++ if (mgt1000) mm++

                                                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 13

                                                                                                            TROUBLE SHOOT

                                                                                                            Troubleshoot

                                                                                                            131 TROUBLE SHOOT

                                                                                                            A newly assembled circuit does not work may be due to -

                                                                                                            Faulty components

                                                                                                            Improper soldering

                                                                                                            Wrong connections

                                                                                                            Also any stop in working after some period may be due to -

                                                                                                            Component failure

                                                                                                            Supply failure

                                                                                                            Damaging of PCB

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                            proper soldering

                                                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                            Resistance measurement is also done which is known as Dry test

                                                                                                            During this project work some green LEDs was not glow then we checked it

                                                                                                            continuity and replace it

                                                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                                                            during soldering PCB We solved that problem

                                                                                                            CHAPTER 14

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            ADVANTAGES OF

                                                                                                            THE PROJECT

                                                                                                            Advantages

                                                                                                            141 ADVANTAGES OF THE PROJECT

                                                                                                            Simple and hand efficient Microcontroller based system

                                                                                                            Fast charging capacity

                                                                                                            Simple to operate

                                                                                                            Ease of mobility

                                                                                                            Facilitates connectivity for 90 of cellular phones

                                                                                                            Less expensive

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Reduced man power

                                                                                                            Low power consumption

                                                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                                                            CHAPTER 15

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            DISADVANTAGES

                                                                                                            OF THE PROJECT

                                                                                                            Disadvantages

                                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                                            It requires mains supply to work project

                                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                            min

                                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                                            CHAPTER 16

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            APPLICATIONS OF

                                                                                                            THE PROJECT

                                                                                                            Application

                                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                                            charge for the mobile phone in any places

                                                                                                            It is used for emergency charging purposes

                                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                                            places

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                                            any location where there is a high footfall creating a large number of

                                                                                                            potential users

                                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                                            CHAPTER 17

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            FUTURE

                                                                                                            DEVELOPMENT OF

                                                                                                            THE PROJECT

                                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                                            condition in public places

                                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                            It will provide battery backup for make it portable

                                                                                                            It will also provide SMS system in future

                                                                                                            We can also increase the charging time by editing software of the project

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 18

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            COST ANALYSIS

                                                                                                            OF THE PROJECT

                                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                                            1811 Component list for power supply card

                                                                                                            Footprint Quantity Designators Rate

                                                                                                            Resistor

                                                                                                            22K 1 R2 1

                                                                                                            1K 1 R1 1

                                                                                                            Capacitor

                                                                                                            1000uf25V 1 C5 10

                                                                                                            2200uf25V 1 C1 10

                                                                                                            022uf 2 C6 C2 1

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                            Table 1811 Component list for power supply card

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            01uf 2 C4 C3 1

                                                                                                            IC

                                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                                            Connector

                                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                                            CON PHO 3PIN 1 J1 12

                                                                                                            LED3mm red 2 L1 L2 15

                                                                                                            Heat sink (TO-220) 2 16

                                                                                                            Total 955

                                                                                                            1812 Component list for battery charger card

                                                                                                            Footprint Quantity Rate

                                                                                                            Capacitor

                                                                                                            2200uf25V 1 1000

                                                                                                            022uf 4 100

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            01uf 4 100

                                                                                                            IC

                                                                                                            BRIDGE W10 1 500

                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                            Connector

                                                                                                            CON PHO 2PIN 1 800

                                                                                                            Relimate 2 pin 1 400

                                                                                                            relimate 3 pin 4 2000

                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                            TOTAL 9300

                                                                                                            1813 Component list for Relay card

                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                            Table 1812Component list for battery charger card

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                            Total 18900

                                                                                                            1814Component list for controller card

                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                            Table 1813Component list for relay card

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                            total 27000

                                                                                                            1815 Miscellaneous material

                                                                                                            Material Quantity Rate

                                                                                                            electronic item

                                                                                                            Transformer

                                                                                                            TXR1 0-9-15 1 20000

                                                                                                            0-9 1A

                                                                                                            0-15 100mA

                                                                                                            TXR2 0-9 1 16500

                                                                                                            0-9 1A

                                                                                                            Proximity switch 1 20000

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                            Table 1814Component list for microcontroller card

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Red push bottom 4 4000

                                                                                                            Green push button 1 1000

                                                                                                            Red led 5mm 4 800

                                                                                                            Green led 5mm 4 800

                                                                                                            Led holder 8 1600

                                                                                                            Copper clad 2 4000

                                                                                                            3 core cable 1 meter 1500

                                                                                                            3 pin plug 1 3000

                                                                                                            2 pin relimate wire 19 9000

                                                                                                            3 pin relimate wire 5 3750

                                                                                                            4 pin relimate wire 2 2000

                                                                                                            mechanical items

                                                                                                            Enclosure 1 25000

                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                            12mm cable gland 1 1000

                                                                                                            Screw 3mm 33 2000

                                                                                                            Screw 35mm 6 2400

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            10 mm spacers 100 1500

                                                                                                            10mm insert to stud 50 10000

                                                                                                            cable tie 2500

                                                                                                            Total 162350

                                                                                                            CHAPTER 19

                                                                                                            APPENDIX

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            APPENDIX

                                                                                                            191 APPENDIX

                                                                                                            1911 78xx IC datasheet

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1912 W10 datasheet

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1913 4n33 IC datasheet

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                            1914 MAX 232

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1915 ULN2003a IC datasheet

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 20

                                                                                                            CONCLUSION

                                                                                                            CONCLUSION

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            201 CONCLUSION

                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                            installed in any business premises

                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                            a high footfall creating a large number of potential users

                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 21

                                                                                                            IMAGES OF THE

                                                                                                            PROJECT

                                                                                                            Images of the project

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Fig 216 Relay driver circuit

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                            Fig214 Power supply circuit

                                                                                                            Fig215 Metal detector proximity switch

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Fig217 Microcontroller circuit

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            CHAPTER 22

                                                                                                            BIBILOGRAPHY

                                                                                                            BIBLIOGRAPHY

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                            221 BIBLIOGRAPHY

                                                                                                            BOOKS

                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                            INTERNET LINKS

                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                            • CHAPTER 1

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1112 Software Development Cycle in Keil

                                                                                                              When we use the Keil Software tools the

                                                                                                              project development cycle is roughly the same as

                                                                                                              it is for any other software development project

                                                                                                              1 Create a project select the target chip from the

                                                                                                              device database and configure the tool settings

                                                                                                              2 Create source files in C or assembly

                                                                                                              3 Build your application with the project

                                                                                                              manager

                                                                                                              4 Correct errors in source files

                                                                                                              5 Test the linked application A block diagram of

                                                                                                              the complete 8051 tool set may best illustrate the

                                                                                                              development cycle

                                                                                                              112 Eagle (Easily Applicable Graphical Layout Editor)

                                                                                                              The EAGLE is an editor which is easy-to-use yet powerful tool for designing

                                                                                                              printed circuit boards (PCBs) It is a complete platform for the development of any type of

                                                                                                              complicated amp sophisticated multilayered PCBs This software consist of the following tool

                                                                                                              1121 Schematic Editor

                                                                                                              In this one can develop amp design circuits for the required PCB

                                                                                                              1122 Layout Editor

                                                                                                              In this one can develop amp design actual PCB structure required This is done automatically by the software using the circuit in the schematic editor itself

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 55

                                                                                                              Fig 111 Software development in KEIL

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1123 Library Editor

                                                                                                              This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                              1124 Auto Router

                                                                                                              This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                              the PCB tracks designed

                                                                                                              1125 Cam Processor

                                                                                                              This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                              Bottom Layer Component Layer Masking Layer etc

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                              TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                              Start

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 12

                                                                                                              INTRODUCTION

                                                                                                              OF

                                                                                                              PROGRAMMING

                                                                                                              Flowchart of programming

                                                                                                              Program code

                                                                                                              121 Flowchart

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                              2

                                                                                                              flag9==1

                                                                                                              flag9=1

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                              flag11==1

                                                                                                              flag11=1 flag11=0 flag4=0

                                                                                                              REady_LED4=0

                                                                                                              Sw2_op (P01) ==0

                                                                                                              My delay (10)

                                                                                                              3 3

                                                                                                              flag2=1 disp2=1 k2=0

                                                                                                              3

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                              4

                                                                                                              flag11==1

                                                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                                                              flag11=1

                                                                                                              My delay (10)

                                                                                                              flag3=1 disp3=1 k3=0

                                                                                                              k1==0||k2==0||k4==0

                                                                                                              Sw3_op (P02) ==0

                                                                                                              5

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                              flag5==1

                                                                                                              5

                                                                                                              flag11==1

                                                                                                              flag7=1

                                                                                                              flag7==1

                                                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                                                              6

                                                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                              flag11=0 flag4=0 REady_LED4=0

                                                                                                              flag11=1

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                              6

                                                                                                              My delay (10)

                                                                                                              flag4=1 disp4=1 k4=0

                                                                                                              k1==0||k2==0||k3==0 flag5==1

                                                                                                              7

                                                                                                              Sw4_op (P03) ==0

                                                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                              7

                                                                                                              flag7==1

                                                                                                              flag9==1

                                                                                                              flag7=1

                                                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                                                              flag9=0 flag3=0 REady_LED3=0

                                                                                                              flag9=1

                                                                                                              Sw5_op A(P04) ==0

                                                                                                              My delay (10)

                                                                                                              8

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                              9

                                                                                                              flag2==1

                                                                                                              flag3==1

                                                                                                              8

                                                                                                              flag1==1

                                                                                                              flag4==1 flag5=1 disp5=1

                                                                                                              flag9=1 disp5=1

                                                                                                              flag7=1 disp5=1

                                                                                                              flag11=1 disp5=1

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                              Sw6_op (P05) ==0

                                                                                                              My delay (10)

                                                                                                              flag2==1 ampamp flag7==1

                                                                                                              flag3==1 ampamp flag9==1 9

                                                                                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                              flag8=1 disp6=1

                                                                                                              10

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                              10

                                                                                                              flag4==1 ampamp flag11==1

                                                                                                              flag10=1 disp6=1

                                                                                                              flag12=1 disp6=1

                                                                                                              flag8==1

                                                                                                              flag10==1

                                                                                                              11

                                                                                                              flag6==1

                                                                                                              i++

                                                                                                              l++

                                                                                                              j++

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                              flag12==1

                                                                                                              M++

                                                                                                              11

                                                                                                              Stop

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              122 Program

                                                                                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                              define buzzerP2_0 buzzer indication

                                                                                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                              sbit sw5_op=P0^4 input switch5 for coin

                                                                                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                              output Led for indication

                                                                                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                              function prototype declaration

                                                                                                              void my_delay(unsigned int value) DELAY FUCTION

                                                                                                              void init_timer() timer 0 initialization function

                                                                                                              variable declaration

                                                                                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              start of main programme

                                                                                                              void main()

                                                                                                              init_timer() call it timer initialization function

                                                                                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                              start of while loop

                                                                                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                              condition for switch1

                                                                                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                              if(iltk) loop will repeat for desired time of charging

                                                                                                              if(igt=1000)

                                                                                                              buzzer=1 turn on buzzer if (ii==20)

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              REady_LED1=1 turn on ready indication of led1

                                                                                                              else if(ii==40)

                                                                                                              REady_LED1=0ii=0

                                                                                                              elseREady_LED1=0

                                                                                                              START_LED1=1

                                                                                                              else

                                                                                                              START_LED1=0

                                                                                                              k1=1 buzzer=0

                                                                                                              REady_LED1=0 flag1=0

                                                                                                              flag5=0flag6=0

                                                                                                              condition for switch2

                                                                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                              REady_LED2=1 turn on ready 2 led indication

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              disp2=0

                                                                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                              if(jltk)

                                                                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                              elseREady_LED2=0

                                                                                                              START_LED2=1

                                                                                                              else START_LED2=0

                                                                                                              REady_LED2=0 k2=1 buzzer=0

                                                                                                              flag2=0flag7=0flag8=0

                                                                                                              j=0jj=0

                                                                                                              condition for switch 3

                                                                                                              if(flag3==1) check swich3 pressed

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              if(disp3==1 )

                                                                                                              REady_LED3=1 disp3=0

                                                                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                              if(lltk)

                                                                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                              elseREady_LED3=0

                                                                                                              START_LED3=1

                                                                                                              else START_LED3=0

                                                                                                              LED2=0 k3=1 buzzer=0

                                                                                                              REady_LED3=0 flag3=0

                                                                                                              flag9=0flag10=0

                                                                                                              l=0ll=0

                                                                                                              condition for switch 4

                                                                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              REady_LED4=1 disp4=0

                                                                                                              if(flag11==1) check coin is pressed

                                                                                                              if(flag12==1) START is pressed

                                                                                                              if(mltk)

                                                                                                              if(mgt1000)

                                                                                                              buzzer=1 if(mm==20)

                                                                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                              elseREady_LED4=0

                                                                                                              START_LED4=1

                                                                                                              else START_LED4=0

                                                                                                              buzzer=0 k4=1

                                                                                                              REady_LED4=0 flag4=0

                                                                                                              flag11=0flag12=0

                                                                                                              m=0mm=0

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              while(1)

                                                                                                              end of main programme

                                                                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                              whenever specific time the interrupt will generate control will go in following function

                                                                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if(sw1_op==0 ) ready switch flag for system1

                                                                                                              my_delay(10) CALL DELAY FUNCTION

                                                                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                              if(flag7==1) SET THE FLAG

                                                                                                              flag7=1

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                              flag9=1

                                                                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                              flag11=1

                                                                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if(sw2_op==0 ) fready switch flag for system2

                                                                                                              my_delay (10)

                                                                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                              if(flag5==1)

                                                                                                              flag5=1

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                              flag9=1

                                                                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                              flag11=1

                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                              if(flag7==1)

                                                                                                              flag7=1

                                                                                                              else

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                              flag5=1

                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                              flag11=1

                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                              if(flag7==1)

                                                                                                              flag7=1

                                                                                                              elseflag7=0

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                                                              flag5=1

                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                              flag9=1

                                                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                              if(flag6==1)

                                                                                                              i++ if (igt1000) ii++

                                                                                                              if (flag8==1)

                                                                                                              j++ if(jgt1000) jj++

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              if (flag10==1)

                                                                                                              l++ if (lgt1000) ll++

                                                                                                              if (flag12==1)

                                                                                                              m++ if (mgt1000) mm++

                                                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 13

                                                                                                              TROUBLE SHOOT

                                                                                                              Troubleshoot

                                                                                                              131 TROUBLE SHOOT

                                                                                                              A newly assembled circuit does not work may be due to -

                                                                                                              Faulty components

                                                                                                              Improper soldering

                                                                                                              Wrong connections

                                                                                                              Also any stop in working after some period may be due to -

                                                                                                              Component failure

                                                                                                              Supply failure

                                                                                                              Damaging of PCB

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                              proper soldering

                                                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                              Resistance measurement is also done which is known as Dry test

                                                                                                              During this project work some green LEDs was not glow then we checked it

                                                                                                              continuity and replace it

                                                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                                                              during soldering PCB We solved that problem

                                                                                                              CHAPTER 14

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              ADVANTAGES OF

                                                                                                              THE PROJECT

                                                                                                              Advantages

                                                                                                              141 ADVANTAGES OF THE PROJECT

                                                                                                              Simple and hand efficient Microcontroller based system

                                                                                                              Fast charging capacity

                                                                                                              Simple to operate

                                                                                                              Ease of mobility

                                                                                                              Facilitates connectivity for 90 of cellular phones

                                                                                                              Less expensive

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Reduced man power

                                                                                                              Low power consumption

                                                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                                                              CHAPTER 15

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              DISADVANTAGES

                                                                                                              OF THE PROJECT

                                                                                                              Disadvantages

                                                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                                                              It requires mains supply to work project

                                                                                                              Due to limited charging channels till now there may be a possibility that

                                                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                              min

                                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                                              CHAPTER 16

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              APPLICATIONS OF

                                                                                                              THE PROJECT

                                                                                                              Application

                                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                                              charge for the mobile phone in any places

                                                                                                              It is used for emergency charging purposes

                                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                                              places

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                                              any location where there is a high footfall creating a large number of

                                                                                                              potential users

                                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                                              CHAPTER 17

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              FUTURE

                                                                                                              DEVELOPMENT OF

                                                                                                              THE PROJECT

                                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                                              condition in public places

                                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                              It will provide battery backup for make it portable

                                                                                                              It will also provide SMS system in future

                                                                                                              We can also increase the charging time by editing software of the project

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 18

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              COST ANALYSIS

                                                                                                              OF THE PROJECT

                                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                                              1811 Component list for power supply card

                                                                                                              Footprint Quantity Designators Rate

                                                                                                              Resistor

                                                                                                              22K 1 R2 1

                                                                                                              1K 1 R1 1

                                                                                                              Capacitor

                                                                                                              1000uf25V 1 C5 10

                                                                                                              2200uf25V 1 C1 10

                                                                                                              022uf 2 C6 C2 1

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                              Table 1811 Component list for power supply card

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              01uf 2 C4 C3 1

                                                                                                              IC

                                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                                              Connector

                                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                                              CON PHO 3PIN 1 J1 12

                                                                                                              LED3mm red 2 L1 L2 15

                                                                                                              Heat sink (TO-220) 2 16

                                                                                                              Total 955

                                                                                                              1812 Component list for battery charger card

                                                                                                              Footprint Quantity Rate

                                                                                                              Capacitor

                                                                                                              2200uf25V 1 1000

                                                                                                              022uf 4 100

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              01uf 4 100

                                                                                                              IC

                                                                                                              BRIDGE W10 1 500

                                                                                                              L7805CV (TO-220) 4 3200

                                                                                                              Connector

                                                                                                              CON PHO 2PIN 1 800

                                                                                                              Relimate 2 pin 1 400

                                                                                                              relimate 3 pin 4 2000

                                                                                                              Heat sink (TO-220) 4 1200

                                                                                                              TOTAL 9300

                                                                                                              1813 Component list for Relay card

                                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                              Table 1812Component list for battery charger card

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                              Total 18900

                                                                                                              1814Component list for controller card

                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                              Table 1813Component list for relay card

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                              total 27000

                                                                                                              1815 Miscellaneous material

                                                                                                              Material Quantity Rate

                                                                                                              electronic item

                                                                                                              Transformer

                                                                                                              TXR1 0-9-15 1 20000

                                                                                                              0-9 1A

                                                                                                              0-15 100mA

                                                                                                              TXR2 0-9 1 16500

                                                                                                              0-9 1A

                                                                                                              Proximity switch 1 20000

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                              Table 1814Component list for microcontroller card

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Red push bottom 4 4000

                                                                                                              Green push button 1 1000

                                                                                                              Red led 5mm 4 800

                                                                                                              Green led 5mm 4 800

                                                                                                              Led holder 8 1600

                                                                                                              Copper clad 2 4000

                                                                                                              3 core cable 1 meter 1500

                                                                                                              3 pin plug 1 3000

                                                                                                              2 pin relimate wire 19 9000

                                                                                                              3 pin relimate wire 5 3750

                                                                                                              4 pin relimate wire 2 2000

                                                                                                              mechanical items

                                                                                                              Enclosure 1 25000

                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                              12mm cable gland 1 1000

                                                                                                              Screw 3mm 33 2000

                                                                                                              Screw 35mm 6 2400

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              10 mm spacers 100 1500

                                                                                                              10mm insert to stud 50 10000

                                                                                                              cable tie 2500

                                                                                                              Total 162350

                                                                                                              CHAPTER 19

                                                                                                              APPENDIX

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              APPENDIX

                                                                                                              191 APPENDIX

                                                                                                              1911 78xx IC datasheet

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1912 W10 datasheet

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1913 4n33 IC datasheet

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                              1914 MAX 232

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1915 ULN2003a IC datasheet

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 20

                                                                                                              CONCLUSION

                                                                                                              CONCLUSION

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              201 CONCLUSION

                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                              installed in any business premises

                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                              a high footfall creating a large number of potential users

                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 21

                                                                                                              IMAGES OF THE

                                                                                                              PROJECT

                                                                                                              Images of the project

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Fig 216 Relay driver circuit

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                              Fig214 Power supply circuit

                                                                                                              Fig215 Metal detector proximity switch

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Fig217 Microcontroller circuit

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              CHAPTER 22

                                                                                                              BIBILOGRAPHY

                                                                                                              BIBLIOGRAPHY

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                              221 BIBLIOGRAPHY

                                                                                                              BOOKS

                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                              INTERNET LINKS

                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                              • CHAPTER 1

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                1123 Library Editor

                                                                                                                This is very useful in case of customized component design that does not occur in the predefined library according to our need

                                                                                                                1124 Auto Router

                                                                                                                This is an artificial intelligence based tool or subroutine that can do auto routing of

                                                                                                                the PCB tracks designed

                                                                                                                1125 Cam Processor

                                                                                                                This is used to finally print the various layers of the designed PCB viz Top Layer

                                                                                                                Bottom Layer Component Layer Masking Layer etc

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 56

                                                                                                                TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                                Start

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 12

                                                                                                                INTRODUCTION

                                                                                                                OF

                                                                                                                PROGRAMMING

                                                                                                                Flowchart of programming

                                                                                                                Program code

                                                                                                                121 Flowchart

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                                2

                                                                                                                flag9==1

                                                                                                                flag9=1

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                                flag11==1

                                                                                                                flag11=1 flag11=0 flag4=0

                                                                                                                REady_LED4=0

                                                                                                                Sw2_op (P01) ==0

                                                                                                                My delay (10)

                                                                                                                3 3

                                                                                                                flag2=1 disp2=1 k2=0

                                                                                                                3

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                                4

                                                                                                                flag11==1

                                                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                                                flag11=1

                                                                                                                My delay (10)

                                                                                                                flag3=1 disp3=1 k3=0

                                                                                                                k1==0||k2==0||k4==0

                                                                                                                Sw3_op (P02) ==0

                                                                                                                5

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                flag5==1

                                                                                                                5

                                                                                                                flag11==1

                                                                                                                flag7=1

                                                                                                                flag7==1

                                                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                                                6

                                                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                flag11=0 flag4=0 REady_LED4=0

                                                                                                                flag11=1

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                6

                                                                                                                My delay (10)

                                                                                                                flag4=1 disp4=1 k4=0

                                                                                                                k1==0||k2==0||k3==0 flag5==1

                                                                                                                7

                                                                                                                Sw4_op (P03) ==0

                                                                                                                flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                7

                                                                                                                flag7==1

                                                                                                                flag9==1

                                                                                                                flag7=1

                                                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                                                flag9=0 flag3=0 REady_LED3=0

                                                                                                                flag9=1

                                                                                                                Sw5_op A(P04) ==0

                                                                                                                My delay (10)

                                                                                                                8

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                9

                                                                                                                flag2==1

                                                                                                                flag3==1

                                                                                                                8

                                                                                                                flag1==1

                                                                                                                flag4==1 flag5=1 disp5=1

                                                                                                                flag9=1 disp5=1

                                                                                                                flag7=1 disp5=1

                                                                                                                flag11=1 disp5=1

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                Sw6_op (P05) ==0

                                                                                                                My delay (10)

                                                                                                                flag2==1 ampamp flag7==1

                                                                                                                flag3==1 ampamp flag9==1 9

                                                                                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                flag8=1 disp6=1

                                                                                                                10

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                10

                                                                                                                flag4==1 ampamp flag11==1

                                                                                                                flag10=1 disp6=1

                                                                                                                flag12=1 disp6=1

                                                                                                                flag8==1

                                                                                                                flag10==1

                                                                                                                11

                                                                                                                flag6==1

                                                                                                                i++

                                                                                                                l++

                                                                                                                j++

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                flag12==1

                                                                                                                M++

                                                                                                                11

                                                                                                                Stop

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                122 Program

                                                                                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                define buzzerP2_0 buzzer indication

                                                                                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                output Led for indication

                                                                                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                function prototype declaration

                                                                                                                void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                void init_timer() timer 0 initialization function

                                                                                                                variable declaration

                                                                                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                start of main programme

                                                                                                                void main()

                                                                                                                init_timer() call it timer initialization function

                                                                                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                start of while loop

                                                                                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                condition for switch1

                                                                                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                if(iltk) loop will repeat for desired time of charging

                                                                                                                if(igt=1000)

                                                                                                                buzzer=1 turn on buzzer if (ii==20)

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                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                REady_LED1=1 turn on ready indication of led1

                                                                                                                else if(ii==40)

                                                                                                                REady_LED1=0ii=0

                                                                                                                elseREady_LED1=0

                                                                                                                START_LED1=1

                                                                                                                else

                                                                                                                START_LED1=0

                                                                                                                k1=1 buzzer=0

                                                                                                                REady_LED1=0 flag1=0

                                                                                                                flag5=0flag6=0

                                                                                                                condition for switch2

                                                                                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                REady_LED2=1 turn on ready 2 led indication

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                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                disp2=0

                                                                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                if(jltk)

                                                                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                elseREady_LED2=0

                                                                                                                START_LED2=1

                                                                                                                else START_LED2=0

                                                                                                                REady_LED2=0 k2=1 buzzer=0

                                                                                                                flag2=0flag7=0flag8=0

                                                                                                                j=0jj=0

                                                                                                                condition for switch 3

                                                                                                                if(flag3==1) check swich3 pressed

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                if(disp3==1 )

                                                                                                                REady_LED3=1 disp3=0

                                                                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                if(lltk)

                                                                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                elseREady_LED3=0

                                                                                                                START_LED3=1

                                                                                                                else START_LED3=0

                                                                                                                LED2=0 k3=1 buzzer=0

                                                                                                                REady_LED3=0 flag3=0

                                                                                                                flag9=0flag10=0

                                                                                                                l=0ll=0

                                                                                                                condition for switch 4

                                                                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                REady_LED4=1 disp4=0

                                                                                                                if(flag11==1) check coin is pressed

                                                                                                                if(flag12==1) START is pressed

                                                                                                                if(mltk)

                                                                                                                if(mgt1000)

                                                                                                                buzzer=1 if(mm==20)

                                                                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                elseREady_LED4=0

                                                                                                                START_LED4=1

                                                                                                                else START_LED4=0

                                                                                                                buzzer=0 k4=1

                                                                                                                REady_LED4=0 flag4=0

                                                                                                                flag11=0flag12=0

                                                                                                                m=0mm=0

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                while(1)

                                                                                                                end of main programme

                                                                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                whenever specific time the interrupt will generate control will go in following function

                                                                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                                                                my_delay(10) CALL DELAY FUNCTION

                                                                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                if(flag7==1) SET THE FLAG

                                                                                                                flag7=1

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                flag9=1

                                                                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                flag11=1

                                                                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                                                                my_delay (10)

                                                                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                if(flag5==1)

                                                                                                                flag5=1

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                flag9=1

                                                                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                flag11=1

                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                if(flag7==1)

                                                                                                                flag7=1

                                                                                                                else

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                flag5=1

                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                flag11=1

                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                if(flag7==1)

                                                                                                                flag7=1

                                                                                                                elseflag7=0

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                flag5=1

                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                flag9=1

                                                                                                                elseflag9=0flag3=0REady_LED3=0

                                                                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                if(flag6==1)

                                                                                                                i++ if (igt1000) ii++

                                                                                                                if (flag8==1)

                                                                                                                j++ if(jgt1000) jj++

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                if (flag10==1)

                                                                                                                l++ if (lgt1000) ll++

                                                                                                                if (flag12==1)

                                                                                                                m++ if (mgt1000) mm++

                                                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 13

                                                                                                                TROUBLE SHOOT

                                                                                                                Troubleshoot

                                                                                                                131 TROUBLE SHOOT

                                                                                                                A newly assembled circuit does not work may be due to -

                                                                                                                Faulty components

                                                                                                                Improper soldering

                                                                                                                Wrong connections

                                                                                                                Also any stop in working after some period may be due to -

                                                                                                                Component failure

                                                                                                                Supply failure

                                                                                                                Damaging of PCB

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                proper soldering

                                                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                Resistance measurement is also done which is known as Dry test

                                                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                                                continuity and replace it

                                                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                                                during soldering PCB We solved that problem

                                                                                                                CHAPTER 14

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                ADVANTAGES OF

                                                                                                                THE PROJECT

                                                                                                                Advantages

                                                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                                                Simple and hand efficient Microcontroller based system

                                                                                                                Fast charging capacity

                                                                                                                Simple to operate

                                                                                                                Ease of mobility

                                                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                                                Less expensive

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Reduced man power

                                                                                                                Low power consumption

                                                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                CHAPTER 15

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                DISADVANTAGES

                                                                                                                OF THE PROJECT

                                                                                                                Disadvantages

                                                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                                                It requires mains supply to work project

                                                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                min

                                                                                                                It does not have battery backup therefore it cannot be portable

                                                                                                                CHAPTER 16

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                APPLICATIONS OF

                                                                                                                THE PROJECT

                                                                                                                Application

                                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                charge for the mobile phone in any places

                                                                                                                It is used for emergency charging purposes

                                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                                places

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                any location where there is a high footfall creating a large number of

                                                                                                                potential users

                                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                                CHAPTER 17

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                FUTURE

                                                                                                                DEVELOPMENT OF

                                                                                                                THE PROJECT

                                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                                condition in public places

                                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                It will provide battery backup for make it portable

                                                                                                                It will also provide SMS system in future

                                                                                                                We can also increase the charging time by editing software of the project

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 18

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                COST ANALYSIS

                                                                                                                OF THE PROJECT

                                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                                1811 Component list for power supply card

                                                                                                                Footprint Quantity Designators Rate

                                                                                                                Resistor

                                                                                                                22K 1 R2 1

                                                                                                                1K 1 R1 1

                                                                                                                Capacitor

                                                                                                                1000uf25V 1 C5 10

                                                                                                                2200uf25V 1 C1 10

                                                                                                                022uf 2 C6 C2 1

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                Table 1811 Component list for power supply card

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                01uf 2 C4 C3 1

                                                                                                                IC

                                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                                Connector

                                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                                LED3mm red 2 L1 L2 15

                                                                                                                Heat sink (TO-220) 2 16

                                                                                                                Total 955

                                                                                                                1812 Component list for battery charger card

                                                                                                                Footprint Quantity Rate

                                                                                                                Capacitor

                                                                                                                2200uf25V 1 1000

                                                                                                                022uf 4 100

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                01uf 4 100

                                                                                                                IC

                                                                                                                BRIDGE W10 1 500

                                                                                                                L7805CV (TO-220) 4 3200

                                                                                                                Connector

                                                                                                                CON PHO 2PIN 1 800

                                                                                                                Relimate 2 pin 1 400

                                                                                                                relimate 3 pin 4 2000

                                                                                                                Heat sink (TO-220) 4 1200

                                                                                                                TOTAL 9300

                                                                                                                1813 Component list for Relay card

                                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                Table 1812Component list for battery charger card

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                Total 18900

                                                                                                                1814Component list for controller card

                                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                Table 1813Component list for relay card

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                total 27000

                                                                                                                1815 Miscellaneous material

                                                                                                                Material Quantity Rate

                                                                                                                electronic item

                                                                                                                Transformer

                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                0-9 1A

                                                                                                                0-15 100mA

                                                                                                                TXR2 0-9 1 16500

                                                                                                                0-9 1A

                                                                                                                Proximity switch 1 20000

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Red push bottom 4 4000

                                                                                                                Green push button 1 1000

                                                                                                                Red led 5mm 4 800

                                                                                                                Green led 5mm 4 800

                                                                                                                Led holder 8 1600

                                                                                                                Copper clad 2 4000

                                                                                                                3 core cable 1 meter 1500

                                                                                                                3 pin plug 1 3000

                                                                                                                2 pin relimate wire 19 9000

                                                                                                                3 pin relimate wire 5 3750

                                                                                                                4 pin relimate wire 2 2000

                                                                                                                mechanical items

                                                                                                                Enclosure 1 25000

                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                12mm cable gland 1 1000

                                                                                                                Screw 3mm 33 2000

                                                                                                                Screw 35mm 6 2400

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                10 mm spacers 100 1500

                                                                                                                10mm insert to stud 50 10000

                                                                                                                cable tie 2500

                                                                                                                Total 162350

                                                                                                                CHAPTER 19

                                                                                                                APPENDIX

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                APPENDIX

                                                                                                                191 APPENDIX

                                                                                                                1911 78xx IC datasheet

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                1912 W10 datasheet

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                1913 4n33 IC datasheet

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                1914 MAX 232

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 20

                                                                                                                CONCLUSION

                                                                                                                CONCLUSION

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                201 CONCLUSION

                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                installed in any business premises

                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                a high footfall creating a large number of potential users

                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 21

                                                                                                                IMAGES OF THE

                                                                                                                PROJECT

                                                                                                                Images of the project

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Fig 216 Relay driver circuit

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                Fig214 Power supply circuit

                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Fig217 Microcontroller circuit

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                CHAPTER 22

                                                                                                                BIBILOGRAPHY

                                                                                                                BIBLIOGRAPHY

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                221 BIBLIOGRAPHY

                                                                                                                BOOKS

                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                INTERNET LINKS

                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                • CHAPTER 1

                                                                                                                  TIMER INITIALISATIONTR0=0 TF0=0 TL0=0XFD TH0=0X4B TR0=1

                                                                                                                  Start

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 12

                                                                                                                  INTRODUCTION

                                                                                                                  OF

                                                                                                                  PROGRAMMING

                                                                                                                  Flowchart of programming

                                                                                                                  Program code

                                                                                                                  121 Flowchart

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 57

                                                                                                                  2

                                                                                                                  flag9==1

                                                                                                                  flag9=1

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                                  flag11==1

                                                                                                                  flag11=1 flag11=0 flag4=0

                                                                                                                  REady_LED4=0

                                                                                                                  Sw2_op (P01) ==0

                                                                                                                  My delay (10)

                                                                                                                  3 3

                                                                                                                  flag2=1 disp2=1 k2=0

                                                                                                                  3

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                                  4

                                                                                                                  flag11==1

                                                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                                                  flag11=1

                                                                                                                  My delay (10)

                                                                                                                  flag3=1 disp3=1 k3=0

                                                                                                                  k1==0||k2==0||k4==0

                                                                                                                  Sw3_op (P02) ==0

                                                                                                                  5

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                  flag5==1

                                                                                                                  5

                                                                                                                  flag11==1

                                                                                                                  flag7=1

                                                                                                                  flag7==1

                                                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                                                  6

                                                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                  flag11=0 flag4=0 REady_LED4=0

                                                                                                                  flag11=1

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                  6

                                                                                                                  My delay (10)

                                                                                                                  flag4=1 disp4=1 k4=0

                                                                                                                  k1==0||k2==0||k3==0 flag5==1

                                                                                                                  7

                                                                                                                  Sw4_op (P03) ==0

                                                                                                                  flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                  7

                                                                                                                  flag7==1

                                                                                                                  flag9==1

                                                                                                                  flag7=1

                                                                                                                  flag7=0 flag2=0 REady_LED2=0

                                                                                                                  flag9=0 flag3=0 REady_LED3=0

                                                                                                                  flag9=1

                                                                                                                  Sw5_op A(P04) ==0

                                                                                                                  My delay (10)

                                                                                                                  8

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                  9

                                                                                                                  flag2==1

                                                                                                                  flag3==1

                                                                                                                  8

                                                                                                                  flag1==1

                                                                                                                  flag4==1 flag5=1 disp5=1

                                                                                                                  flag9=1 disp5=1

                                                                                                                  flag7=1 disp5=1

                                                                                                                  flag11=1 disp5=1

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                  Sw6_op (P05) ==0

                                                                                                                  My delay (10)

                                                                                                                  flag2==1 ampamp flag7==1

                                                                                                                  flag3==1 ampamp flag9==1 9

                                                                                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                  flag8=1 disp6=1

                                                                                                                  10

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                  10

                                                                                                                  flag4==1 ampamp flag11==1

                                                                                                                  flag10=1 disp6=1

                                                                                                                  flag12=1 disp6=1

                                                                                                                  flag8==1

                                                                                                                  flag10==1

                                                                                                                  11

                                                                                                                  flag6==1

                                                                                                                  i++

                                                                                                                  l++

                                                                                                                  j++

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                  flag12==1

                                                                                                                  M++

                                                                                                                  11

                                                                                                                  Stop

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  122 Program

                                                                                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                  define buzzerP2_0 buzzer indication

                                                                                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                  output Led for indication

                                                                                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                  function prototype declaration

                                                                                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                  void init_timer() timer 0 initialization function

                                                                                                                  variable declaration

                                                                                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  start of main programme

                                                                                                                  void main()

                                                                                                                  init_timer() call it timer initialization function

                                                                                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                  start of while loop

                                                                                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                  condition for switch1

                                                                                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                  if(iltk) loop will repeat for desired time of charging

                                                                                                                  if(igt=1000)

                                                                                                                  buzzer=1 turn on buzzer if (ii==20)

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  REady_LED1=1 turn on ready indication of led1

                                                                                                                  else if(ii==40)

                                                                                                                  REady_LED1=0ii=0

                                                                                                                  elseREady_LED1=0

                                                                                                                  START_LED1=1

                                                                                                                  else

                                                                                                                  START_LED1=0

                                                                                                                  k1=1 buzzer=0

                                                                                                                  REady_LED1=0 flag1=0

                                                                                                                  flag5=0flag6=0

                                                                                                                  condition for switch2

                                                                                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                  REady_LED2=1 turn on ready 2 led indication

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  disp2=0

                                                                                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                  if(jltk)

                                                                                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                  elseREady_LED2=0

                                                                                                                  START_LED2=1

                                                                                                                  else START_LED2=0

                                                                                                                  REady_LED2=0 k2=1 buzzer=0

                                                                                                                  flag2=0flag7=0flag8=0

                                                                                                                  j=0jj=0

                                                                                                                  condition for switch 3

                                                                                                                  if(flag3==1) check swich3 pressed

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  if(disp3==1 )

                                                                                                                  REady_LED3=1 disp3=0

                                                                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                  if(lltk)

                                                                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                  elseREady_LED3=0

                                                                                                                  START_LED3=1

                                                                                                                  else START_LED3=0

                                                                                                                  LED2=0 k3=1 buzzer=0

                                                                                                                  REady_LED3=0 flag3=0

                                                                                                                  flag9=0flag10=0

                                                                                                                  l=0ll=0

                                                                                                                  condition for switch 4

                                                                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  REady_LED4=1 disp4=0

                                                                                                                  if(flag11==1) check coin is pressed

                                                                                                                  if(flag12==1) START is pressed

                                                                                                                  if(mltk)

                                                                                                                  if(mgt1000)

                                                                                                                  buzzer=1 if(mm==20)

                                                                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                  elseREady_LED4=0

                                                                                                                  START_LED4=1

                                                                                                                  else START_LED4=0

                                                                                                                  buzzer=0 k4=1

                                                                                                                  REady_LED4=0 flag4=0

                                                                                                                  flag11=0flag12=0

                                                                                                                  m=0mm=0

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  while(1)

                                                                                                                  end of main programme

                                                                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                  if(flag7==1) SET THE FLAG

                                                                                                                  flag7=1

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                  flag9=1

                                                                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                  flag11=1

                                                                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                                                                  my_delay (10)

                                                                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                  if(flag5==1)

                                                                                                                  flag5=1

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                  flag9=1

                                                                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                  flag11=1

                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                  if(flag7==1)

                                                                                                                  flag7=1

                                                                                                                  else

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                  flag5=1

                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                  flag11=1

                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                  if(flag7==1)

                                                                                                                  flag7=1

                                                                                                                  elseflag7=0

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                  flag5=1

                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                  flag9=1

                                                                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                  if(flag6==1)

                                                                                                                  i++ if (igt1000) ii++

                                                                                                                  if (flag8==1)

                                                                                                                  j++ if(jgt1000) jj++

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  if (flag10==1)

                                                                                                                  l++ if (lgt1000) ll++

                                                                                                                  if (flag12==1)

                                                                                                                  m++ if (mgt1000) mm++

                                                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 13

                                                                                                                  TROUBLE SHOOT

                                                                                                                  Troubleshoot

                                                                                                                  131 TROUBLE SHOOT

                                                                                                                  A newly assembled circuit does not work may be due to -

                                                                                                                  Faulty components

                                                                                                                  Improper soldering

                                                                                                                  Wrong connections

                                                                                                                  Also any stop in working after some period may be due to -

                                                                                                                  Component failure

                                                                                                                  Supply failure

                                                                                                                  Damaging of PCB

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                  proper soldering

                                                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                                                  continuity and replace it

                                                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                                                  during soldering PCB We solved that problem

                                                                                                                  CHAPTER 14

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  ADVANTAGES OF

                                                                                                                  THE PROJECT

                                                                                                                  Advantages

                                                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                                                  Simple and hand efficient Microcontroller based system

                                                                                                                  Fast charging capacity

                                                                                                                  Simple to operate

                                                                                                                  Ease of mobility

                                                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                                                  Less expensive

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Reduced man power

                                                                                                                  Low power consumption

                                                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                  CHAPTER 15

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  DISADVANTAGES

                                                                                                                  OF THE PROJECT

                                                                                                                  Disadvantages

                                                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                                                  It requires mains supply to work project

                                                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                  min

                                                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                                                  CHAPTER 16

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  APPLICATIONS OF

                                                                                                                  THE PROJECT

                                                                                                                  Application

                                                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                  charge for the mobile phone in any places

                                                                                                                  It is used for emergency charging purposes

                                                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                                                  places

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                                  potential users

                                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                                  CHAPTER 17

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  FUTURE

                                                                                                                  DEVELOPMENT OF

                                                                                                                  THE PROJECT

                                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                                  condition in public places

                                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                  It will provide battery backup for make it portable

                                                                                                                  It will also provide SMS system in future

                                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 18

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  COST ANALYSIS

                                                                                                                  OF THE PROJECT

                                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                                  1811 Component list for power supply card

                                                                                                                  Footprint Quantity Designators Rate

                                                                                                                  Resistor

                                                                                                                  22K 1 R2 1

                                                                                                                  1K 1 R1 1

                                                                                                                  Capacitor

                                                                                                                  1000uf25V 1 C5 10

                                                                                                                  2200uf25V 1 C1 10

                                                                                                                  022uf 2 C6 C2 1

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                  Table 1811 Component list for power supply card

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  01uf 2 C4 C3 1

                                                                                                                  IC

                                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                                  Connector

                                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                                  Heat sink (TO-220) 2 16

                                                                                                                  Total 955

                                                                                                                  1812 Component list for battery charger card

                                                                                                                  Footprint Quantity Rate

                                                                                                                  Capacitor

                                                                                                                  2200uf25V 1 1000

                                                                                                                  022uf 4 100

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  01uf 4 100

                                                                                                                  IC

                                                                                                                  BRIDGE W10 1 500

                                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                                  Connector

                                                                                                                  CON PHO 2PIN 1 800

                                                                                                                  Relimate 2 pin 1 400

                                                                                                                  relimate 3 pin 4 2000

                                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                                  TOTAL 9300

                                                                                                                  1813 Component list for Relay card

                                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                  Table 1812Component list for battery charger card

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                  Total 18900

                                                                                                                  1814Component list for controller card

                                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                  Table 1813Component list for relay card

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                  total 27000

                                                                                                                  1815 Miscellaneous material

                                                                                                                  Material Quantity Rate

                                                                                                                  electronic item

                                                                                                                  Transformer

                                                                                                                  TXR1 0-9-15 1 20000

                                                                                                                  0-9 1A

                                                                                                                  0-15 100mA

                                                                                                                  TXR2 0-9 1 16500

                                                                                                                  0-9 1A

                                                                                                                  Proximity switch 1 20000

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                  Table 1814Component list for microcontroller card

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Red push bottom 4 4000

                                                                                                                  Green push button 1 1000

                                                                                                                  Red led 5mm 4 800

                                                                                                                  Green led 5mm 4 800

                                                                                                                  Led holder 8 1600

                                                                                                                  Copper clad 2 4000

                                                                                                                  3 core cable 1 meter 1500

                                                                                                                  3 pin plug 1 3000

                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                  mechanical items

                                                                                                                  Enclosure 1 25000

                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                  12mm cable gland 1 1000

                                                                                                                  Screw 3mm 33 2000

                                                                                                                  Screw 35mm 6 2400

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  10 mm spacers 100 1500

                                                                                                                  10mm insert to stud 50 10000

                                                                                                                  cable tie 2500

                                                                                                                  Total 162350

                                                                                                                  CHAPTER 19

                                                                                                                  APPENDIX

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  APPENDIX

                                                                                                                  191 APPENDIX

                                                                                                                  1911 78xx IC datasheet

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  1912 W10 datasheet

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  1913 4n33 IC datasheet

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                  1914 MAX 232

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 20

                                                                                                                  CONCLUSION

                                                                                                                  CONCLUSION

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  201 CONCLUSION

                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                  installed in any business premises

                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 21

                                                                                                                  IMAGES OF THE

                                                                                                                  PROJECT

                                                                                                                  Images of the project

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                  Fig214 Power supply circuit

                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  CHAPTER 22

                                                                                                                  BIBILOGRAPHY

                                                                                                                  BIBLIOGRAPHY

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                  BOOKS

                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                  INTERNET LINKS

                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                  • CHAPTER 1

                                                                                                                    2

                                                                                                                    flag9==1

                                                                                                                    flag9=1

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 58

                                                                                                                    flag11==1

                                                                                                                    flag11=1 flag11=0 flag4=0

                                                                                                                    REady_LED4=0

                                                                                                                    Sw2_op (P01) ==0

                                                                                                                    My delay (10)

                                                                                                                    3 3

                                                                                                                    flag2=1 disp2=1 k2=0

                                                                                                                    3

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                                    4

                                                                                                                    flag11==1

                                                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                                                    flag11=1

                                                                                                                    My delay (10)

                                                                                                                    flag3=1 disp3=1 k3=0

                                                                                                                    k1==0||k2==0||k4==0

                                                                                                                    Sw3_op (P02) ==0

                                                                                                                    5

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                    flag5==1

                                                                                                                    5

                                                                                                                    flag11==1

                                                                                                                    flag7=1

                                                                                                                    flag7==1

                                                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                                                    6

                                                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                    flag11=0 flag4=0 REady_LED4=0

                                                                                                                    flag11=1

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                    6

                                                                                                                    My delay (10)

                                                                                                                    flag4=1 disp4=1 k4=0

                                                                                                                    k1==0||k2==0||k3==0 flag5==1

                                                                                                                    7

                                                                                                                    Sw4_op (P03) ==0

                                                                                                                    flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                    7

                                                                                                                    flag7==1

                                                                                                                    flag9==1

                                                                                                                    flag7=1

                                                                                                                    flag7=0 flag2=0 REady_LED2=0

                                                                                                                    flag9=0 flag3=0 REady_LED3=0

                                                                                                                    flag9=1

                                                                                                                    Sw5_op A(P04) ==0

                                                                                                                    My delay (10)

                                                                                                                    8

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                    9

                                                                                                                    flag2==1

                                                                                                                    flag3==1

                                                                                                                    8

                                                                                                                    flag1==1

                                                                                                                    flag4==1 flag5=1 disp5=1

                                                                                                                    flag9=1 disp5=1

                                                                                                                    flag7=1 disp5=1

                                                                                                                    flag11=1 disp5=1

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                    Sw6_op (P05) ==0

                                                                                                                    My delay (10)

                                                                                                                    flag2==1 ampamp flag7==1

                                                                                                                    flag3==1 ampamp flag9==1 9

                                                                                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                    flag8=1 disp6=1

                                                                                                                    10

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                    10

                                                                                                                    flag4==1 ampamp flag11==1

                                                                                                                    flag10=1 disp6=1

                                                                                                                    flag12=1 disp6=1

                                                                                                                    flag8==1

                                                                                                                    flag10==1

                                                                                                                    11

                                                                                                                    flag6==1

                                                                                                                    i++

                                                                                                                    l++

                                                                                                                    j++

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                    flag12==1

                                                                                                                    M++

                                                                                                                    11

                                                                                                                    Stop

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    122 Program

                                                                                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                    define buzzerP2_0 buzzer indication

                                                                                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                    output Led for indication

                                                                                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                    function prototype declaration

                                                                                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                    void init_timer() timer 0 initialization function

                                                                                                                    variable declaration

                                                                                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    start of main programme

                                                                                                                    void main()

                                                                                                                    init_timer() call it timer initialization function

                                                                                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                    start of while loop

                                                                                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                    condition for switch1

                                                                                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                    if(iltk) loop will repeat for desired time of charging

                                                                                                                    if(igt=1000)

                                                                                                                    buzzer=1 turn on buzzer if (ii==20)

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    REady_LED1=1 turn on ready indication of led1

                                                                                                                    else if(ii==40)

                                                                                                                    REady_LED1=0ii=0

                                                                                                                    elseREady_LED1=0

                                                                                                                    START_LED1=1

                                                                                                                    else

                                                                                                                    START_LED1=0

                                                                                                                    k1=1 buzzer=0

                                                                                                                    REady_LED1=0 flag1=0

                                                                                                                    flag5=0flag6=0

                                                                                                                    condition for switch2

                                                                                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                    REady_LED2=1 turn on ready 2 led indication

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    disp2=0

                                                                                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                    if(jltk)

                                                                                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                    elseREady_LED2=0

                                                                                                                    START_LED2=1

                                                                                                                    else START_LED2=0

                                                                                                                    REady_LED2=0 k2=1 buzzer=0

                                                                                                                    flag2=0flag7=0flag8=0

                                                                                                                    j=0jj=0

                                                                                                                    condition for switch 3

                                                                                                                    if(flag3==1) check swich3 pressed

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    if(disp3==1 )

                                                                                                                    REady_LED3=1 disp3=0

                                                                                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                    if(lltk)

                                                                                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                    elseREady_LED3=0

                                                                                                                    START_LED3=1

                                                                                                                    else START_LED3=0

                                                                                                                    LED2=0 k3=1 buzzer=0

                                                                                                                    REady_LED3=0 flag3=0

                                                                                                                    flag9=0flag10=0

                                                                                                                    l=0ll=0

                                                                                                                    condition for switch 4

                                                                                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    REady_LED4=1 disp4=0

                                                                                                                    if(flag11==1) check coin is pressed

                                                                                                                    if(flag12==1) START is pressed

                                                                                                                    if(mltk)

                                                                                                                    if(mgt1000)

                                                                                                                    buzzer=1 if(mm==20)

                                                                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                    elseREady_LED4=0

                                                                                                                    START_LED4=1

                                                                                                                    else START_LED4=0

                                                                                                                    buzzer=0 k4=1

                                                                                                                    REady_LED4=0 flag4=0

                                                                                                                    flag11=0flag12=0

                                                                                                                    m=0mm=0

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    while(1)

                                                                                                                    end of main programme

                                                                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                    if(flag7==1) SET THE FLAG

                                                                                                                    flag7=1

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                    flag9=1

                                                                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                    flag11=1

                                                                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                                                                    my_delay (10)

                                                                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                    if(flag5==1)

                                                                                                                    flag5=1

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                    flag9=1

                                                                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                    flag11=1

                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                    if(flag7==1)

                                                                                                                    flag7=1

                                                                                                                    else

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                    flag5=1

                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                    flag11=1

                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                    if(flag7==1)

                                                                                                                    flag7=1

                                                                                                                    elseflag7=0

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                    flag5=1

                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                    flag9=1

                                                                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                    if(flag6==1)

                                                                                                                    i++ if (igt1000) ii++

                                                                                                                    if (flag8==1)

                                                                                                                    j++ if(jgt1000) jj++

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    if (flag10==1)

                                                                                                                    l++ if (lgt1000) ll++

                                                                                                                    if (flag12==1)

                                                                                                                    m++ if (mgt1000) mm++

                                                                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    CHAPTER 13

                                                                                                                    TROUBLE SHOOT

                                                                                                                    Troubleshoot

                                                                                                                    131 TROUBLE SHOOT

                                                                                                                    A newly assembled circuit does not work may be due to -

                                                                                                                    Faulty components

                                                                                                                    Improper soldering

                                                                                                                    Wrong connections

                                                                                                                    Also any stop in working after some period may be due to -

                                                                                                                    Component failure

                                                                                                                    Supply failure

                                                                                                                    Damaging of PCB

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                    proper soldering

                                                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                                                    continuity and replace it

                                                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                                                    during soldering PCB We solved that problem

                                                                                                                    CHAPTER 14

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    ADVANTAGES OF

                                                                                                                    THE PROJECT

                                                                                                                    Advantages

                                                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                                                    Simple and hand efficient Microcontroller based system

                                                                                                                    Fast charging capacity

                                                                                                                    Simple to operate

                                                                                                                    Ease of mobility

                                                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                                                    Less expensive

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Reduced man power

                                                                                                                    Low power consumption

                                                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                    CHAPTER 15

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    DISADVANTAGES

                                                                                                                    OF THE PROJECT

                                                                                                                    Disadvantages

                                                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                                                    It requires mains supply to work project

                                                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                    min

                                                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                                                    CHAPTER 16

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    APPLICATIONS OF

                                                                                                                    THE PROJECT

                                                                                                                    Application

                                                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                    charge for the mobile phone in any places

                                                                                                                    It is used for emergency charging purposes

                                                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                                                    places

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                    any location where there is a high footfall creating a large number of

                                                                                                                    potential users

                                                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                                                    CHAPTER 17

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    FUTURE

                                                                                                                    DEVELOPMENT OF

                                                                                                                    THE PROJECT

                                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                                    condition in public places

                                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                    It will provide battery backup for make it portable

                                                                                                                    It will also provide SMS system in future

                                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    CHAPTER 18

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    COST ANALYSIS

                                                                                                                    OF THE PROJECT

                                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                                    1811 Component list for power supply card

                                                                                                                    Footprint Quantity Designators Rate

                                                                                                                    Resistor

                                                                                                                    22K 1 R2 1

                                                                                                                    1K 1 R1 1

                                                                                                                    Capacitor

                                                                                                                    1000uf25V 1 C5 10

                                                                                                                    2200uf25V 1 C1 10

                                                                                                                    022uf 2 C6 C2 1

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                    Table 1811 Component list for power supply card

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    01uf 2 C4 C3 1

                                                                                                                    IC

                                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                                    Connector

                                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                                    Heat sink (TO-220) 2 16

                                                                                                                    Total 955

                                                                                                                    1812 Component list for battery charger card

                                                                                                                    Footprint Quantity Rate

                                                                                                                    Capacitor

                                                                                                                    2200uf25V 1 1000

                                                                                                                    022uf 4 100

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    01uf 4 100

                                                                                                                    IC

                                                                                                                    BRIDGE W10 1 500

                                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                                    Connector

                                                                                                                    CON PHO 2PIN 1 800

                                                                                                                    Relimate 2 pin 1 400

                                                                                                                    relimate 3 pin 4 2000

                                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                                    TOTAL 9300

                                                                                                                    1813 Component list for Relay card

                                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                    Table 1812Component list for battery charger card

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                    Total 18900

                                                                                                                    1814Component list for controller card

                                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                    Table 1813Component list for relay card

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                    total 27000

                                                                                                                    1815 Miscellaneous material

                                                                                                                    Material Quantity Rate

                                                                                                                    electronic item

                                                                                                                    Transformer

                                                                                                                    TXR1 0-9-15 1 20000

                                                                                                                    0-9 1A

                                                                                                                    0-15 100mA

                                                                                                                    TXR2 0-9 1 16500

                                                                                                                    0-9 1A

                                                                                                                    Proximity switch 1 20000

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                    Table 1814Component list for microcontroller card

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Red push bottom 4 4000

                                                                                                                    Green push button 1 1000

                                                                                                                    Red led 5mm 4 800

                                                                                                                    Green led 5mm 4 800

                                                                                                                    Led holder 8 1600

                                                                                                                    Copper clad 2 4000

                                                                                                                    3 core cable 1 meter 1500

                                                                                                                    3 pin plug 1 3000

                                                                                                                    2 pin relimate wire 19 9000

                                                                                                                    3 pin relimate wire 5 3750

                                                                                                                    4 pin relimate wire 2 2000

                                                                                                                    mechanical items

                                                                                                                    Enclosure 1 25000

                                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                                    12mm cable gland 1 1000

                                                                                                                    Screw 3mm 33 2000

                                                                                                                    Screw 35mm 6 2400

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    10 mm spacers 100 1500

                                                                                                                    10mm insert to stud 50 10000

                                                                                                                    cable tie 2500

                                                                                                                    Total 162350

                                                                                                                    CHAPTER 19

                                                                                                                    APPENDIX

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    APPENDIX

                                                                                                                    191 APPENDIX

                                                                                                                    1911 78xx IC datasheet

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    1912 W10 datasheet

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    1913 4n33 IC datasheet

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                    1914 MAX 232

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    CHAPTER 20

                                                                                                                    CONCLUSION

                                                                                                                    CONCLUSION

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    201 CONCLUSION

                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                    installed in any business premises

                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    CHAPTER 21

                                                                                                                    IMAGES OF THE

                                                                                                                    PROJECT

                                                                                                                    Images of the project

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                    Fig214 Power supply circuit

                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    CHAPTER 22

                                                                                                                    BIBILOGRAPHY

                                                                                                                    BIBLIOGRAPHY

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                    BOOKS

                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                    INTERNET LINKS

                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                    • CHAPTER 1

                                                                                                                      flag11==1

                                                                                                                      flag11=1 flag11=0 flag4=0

                                                                                                                      REady_LED4=0

                                                                                                                      Sw2_op (P01) ==0

                                                                                                                      My delay (10)

                                                                                                                      3 3

                                                                                                                      flag2=1 disp2=1 k2=0

                                                                                                                      3

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 59

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                                      4

                                                                                                                      flag11==1

                                                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                                                      flag11=1

                                                                                                                      My delay (10)

                                                                                                                      flag3=1 disp3=1 k3=0

                                                                                                                      k1==0||k2==0||k4==0

                                                                                                                      Sw3_op (P02) ==0

                                                                                                                      5

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                      flag5==1

                                                                                                                      5

                                                                                                                      flag11==1

                                                                                                                      flag7=1

                                                                                                                      flag7==1

                                                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                                                      6

                                                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                      flag11=0 flag4=0 REady_LED4=0

                                                                                                                      flag11=1

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                      6

                                                                                                                      My delay (10)

                                                                                                                      flag4=1 disp4=1 k4=0

                                                                                                                      k1==0||k2==0||k3==0 flag5==1

                                                                                                                      7

                                                                                                                      Sw4_op (P03) ==0

                                                                                                                      flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                      7

                                                                                                                      flag7==1

                                                                                                                      flag9==1

                                                                                                                      flag7=1

                                                                                                                      flag7=0 flag2=0 REady_LED2=0

                                                                                                                      flag9=0 flag3=0 REady_LED3=0

                                                                                                                      flag9=1

                                                                                                                      Sw5_op A(P04) ==0

                                                                                                                      My delay (10)

                                                                                                                      8

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                      9

                                                                                                                      flag2==1

                                                                                                                      flag3==1

                                                                                                                      8

                                                                                                                      flag1==1

                                                                                                                      flag4==1 flag5=1 disp5=1

                                                                                                                      flag9=1 disp5=1

                                                                                                                      flag7=1 disp5=1

                                                                                                                      flag11=1 disp5=1

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                      Sw6_op (P05) ==0

                                                                                                                      My delay (10)

                                                                                                                      flag2==1 ampamp flag7==1

                                                                                                                      flag3==1 ampamp flag9==1 9

                                                                                                                      flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                      flag8=1 disp6=1

                                                                                                                      10

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                      10

                                                                                                                      flag4==1 ampamp flag11==1

                                                                                                                      flag10=1 disp6=1

                                                                                                                      flag12=1 disp6=1

                                                                                                                      flag8==1

                                                                                                                      flag10==1

                                                                                                                      11

                                                                                                                      flag6==1

                                                                                                                      i++

                                                                                                                      l++

                                                                                                                      j++

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                      flag12==1

                                                                                                                      M++

                                                                                                                      11

                                                                                                                      Stop

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

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                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      122 Program

                                                                                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                      define buzzerP2_0 buzzer indication

                                                                                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                      output Led for indication

                                                                                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                      function prototype declaration

                                                                                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                      void init_timer() timer 0 initialization function

                                                                                                                      variable declaration

                                                                                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      start of main programme

                                                                                                                      void main()

                                                                                                                      init_timer() call it timer initialization function

                                                                                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                      start of while loop

                                                                                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                      condition for switch1

                                                                                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                      if(iltk) loop will repeat for desired time of charging

                                                                                                                      if(igt=1000)

                                                                                                                      buzzer=1 turn on buzzer if (ii==20)

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      REady_LED1=1 turn on ready indication of led1

                                                                                                                      else if(ii==40)

                                                                                                                      REady_LED1=0ii=0

                                                                                                                      elseREady_LED1=0

                                                                                                                      START_LED1=1

                                                                                                                      else

                                                                                                                      START_LED1=0

                                                                                                                      k1=1 buzzer=0

                                                                                                                      REady_LED1=0 flag1=0

                                                                                                                      flag5=0flag6=0

                                                                                                                      condition for switch2

                                                                                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                      REady_LED2=1 turn on ready 2 led indication

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      disp2=0

                                                                                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                      if(jltk)

                                                                                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                      elseREady_LED2=0

                                                                                                                      START_LED2=1

                                                                                                                      else START_LED2=0

                                                                                                                      REady_LED2=0 k2=1 buzzer=0

                                                                                                                      flag2=0flag7=0flag8=0

                                                                                                                      j=0jj=0

                                                                                                                      condition for switch 3

                                                                                                                      if(flag3==1) check swich3 pressed

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      if(disp3==1 )

                                                                                                                      REady_LED3=1 disp3=0

                                                                                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                      if(lltk)

                                                                                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                      elseREady_LED3=0

                                                                                                                      START_LED3=1

                                                                                                                      else START_LED3=0

                                                                                                                      LED2=0 k3=1 buzzer=0

                                                                                                                      REady_LED3=0 flag3=0

                                                                                                                      flag9=0flag10=0

                                                                                                                      l=0ll=0

                                                                                                                      condition for switch 4

                                                                                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      REady_LED4=1 disp4=0

                                                                                                                      if(flag11==1) check coin is pressed

                                                                                                                      if(flag12==1) START is pressed

                                                                                                                      if(mltk)

                                                                                                                      if(mgt1000)

                                                                                                                      buzzer=1 if(mm==20)

                                                                                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                      elseREady_LED4=0

                                                                                                                      START_LED4=1

                                                                                                                      else START_LED4=0

                                                                                                                      buzzer=0 k4=1

                                                                                                                      REady_LED4=0 flag4=0

                                                                                                                      flag11=0flag12=0

                                                                                                                      m=0mm=0

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      while(1)

                                                                                                                      end of main programme

                                                                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                      if(flag7==1) SET THE FLAG

                                                                                                                      flag7=1

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                      flag9=1

                                                                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                      flag11=1

                                                                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                                                                      my_delay (10)

                                                                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                      if(flag5==1)

                                                                                                                      flag5=1

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                      flag9=1

                                                                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                      flag11=1

                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                      if(flag7==1)

                                                                                                                      flag7=1

                                                                                                                      else

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                      flag5=1

                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                      flag11=1

                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                      if(flag7==1)

                                                                                                                      flag7=1

                                                                                                                      elseflag7=0

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                      flag5=1

                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                      flag9=1

                                                                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                      if(flag6==1)

                                                                                                                      i++ if (igt1000) ii++

                                                                                                                      if (flag8==1)

                                                                                                                      j++ if(jgt1000) jj++

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      if (flag10==1)

                                                                                                                      l++ if (lgt1000) ll++

                                                                                                                      if (flag12==1)

                                                                                                                      m++ if (mgt1000) mm++

                                                                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      CHAPTER 13

                                                                                                                      TROUBLE SHOOT

                                                                                                                      Troubleshoot

                                                                                                                      131 TROUBLE SHOOT

                                                                                                                      A newly assembled circuit does not work may be due to -

                                                                                                                      Faulty components

                                                                                                                      Improper soldering

                                                                                                                      Wrong connections

                                                                                                                      Also any stop in working after some period may be due to -

                                                                                                                      Component failure

                                                                                                                      Supply failure

                                                                                                                      Damaging of PCB

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                      proper soldering

                                                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                                                      continuity and replace it

                                                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                                                      during soldering PCB We solved that problem

                                                                                                                      CHAPTER 14

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      ADVANTAGES OF

                                                                                                                      THE PROJECT

                                                                                                                      Advantages

                                                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                                                      Simple and hand efficient Microcontroller based system

                                                                                                                      Fast charging capacity

                                                                                                                      Simple to operate

                                                                                                                      Ease of mobility

                                                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                                                      Less expensive

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Reduced man power

                                                                                                                      Low power consumption

                                                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                      CHAPTER 15

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      DISADVANTAGES

                                                                                                                      OF THE PROJECT

                                                                                                                      Disadvantages

                                                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                                                      It requires mains supply to work project

                                                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                      min

                                                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                                                      CHAPTER 16

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      APPLICATIONS OF

                                                                                                                      THE PROJECT

                                                                                                                      Application

                                                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                      charge for the mobile phone in any places

                                                                                                                      It is used for emergency charging purposes

                                                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                                                      places

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                      any location where there is a high footfall creating a large number of

                                                                                                                      potential users

                                                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                                                      CHAPTER 17

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      FUTURE

                                                                                                                      DEVELOPMENT OF

                                                                                                                      THE PROJECT

                                                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                                                      condition in public places

                                                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                      It will provide battery backup for make it portable

                                                                                                                      It will also provide SMS system in future

                                                                                                                      We can also increase the charging time by editing software of the project

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      CHAPTER 18

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      COST ANALYSIS

                                                                                                                      OF THE PROJECT

                                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                                      1811 Component list for power supply card

                                                                                                                      Footprint Quantity Designators Rate

                                                                                                                      Resistor

                                                                                                                      22K 1 R2 1

                                                                                                                      1K 1 R1 1

                                                                                                                      Capacitor

                                                                                                                      1000uf25V 1 C5 10

                                                                                                                      2200uf25V 1 C1 10

                                                                                                                      022uf 2 C6 C2 1

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                      Table 1811 Component list for power supply card

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      01uf 2 C4 C3 1

                                                                                                                      IC

                                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                                      Connector

                                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                                      Heat sink (TO-220) 2 16

                                                                                                                      Total 955

                                                                                                                      1812 Component list for battery charger card

                                                                                                                      Footprint Quantity Rate

                                                                                                                      Capacitor

                                                                                                                      2200uf25V 1 1000

                                                                                                                      022uf 4 100

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      01uf 4 100

                                                                                                                      IC

                                                                                                                      BRIDGE W10 1 500

                                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                                      Connector

                                                                                                                      CON PHO 2PIN 1 800

                                                                                                                      Relimate 2 pin 1 400

                                                                                                                      relimate 3 pin 4 2000

                                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                                      TOTAL 9300

                                                                                                                      1813 Component list for Relay card

                                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                      Table 1812Component list for battery charger card

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                      Total 18900

                                                                                                                      1814Component list for controller card

                                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                      Table 1813Component list for relay card

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                      total 27000

                                                                                                                      1815 Miscellaneous material

                                                                                                                      Material Quantity Rate

                                                                                                                      electronic item

                                                                                                                      Transformer

                                                                                                                      TXR1 0-9-15 1 20000

                                                                                                                      0-9 1A

                                                                                                                      0-15 100mA

                                                                                                                      TXR2 0-9 1 16500

                                                                                                                      0-9 1A

                                                                                                                      Proximity switch 1 20000

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                      Table 1814Component list for microcontroller card

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Red push bottom 4 4000

                                                                                                                      Green push button 1 1000

                                                                                                                      Red led 5mm 4 800

                                                                                                                      Green led 5mm 4 800

                                                                                                                      Led holder 8 1600

                                                                                                                      Copper clad 2 4000

                                                                                                                      3 core cable 1 meter 1500

                                                                                                                      3 pin plug 1 3000

                                                                                                                      2 pin relimate wire 19 9000

                                                                                                                      3 pin relimate wire 5 3750

                                                                                                                      4 pin relimate wire 2 2000

                                                                                                                      mechanical items

                                                                                                                      Enclosure 1 25000

                                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                                      12mm cable gland 1 1000

                                                                                                                      Screw 3mm 33 2000

                                                                                                                      Screw 35mm 6 2400

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      10 mm spacers 100 1500

                                                                                                                      10mm insert to stud 50 10000

                                                                                                                      cable tie 2500

                                                                                                                      Total 162350

                                                                                                                      CHAPTER 19

                                                                                                                      APPENDIX

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      APPENDIX

                                                                                                                      191 APPENDIX

                                                                                                                      1911 78xx IC datasheet

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      1912 W10 datasheet

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      1913 4n33 IC datasheet

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                      1914 MAX 232

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      CHAPTER 20

                                                                                                                      CONCLUSION

                                                                                                                      CONCLUSION

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      201 CONCLUSION

                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                      installed in any business premises

                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      CHAPTER 21

                                                                                                                      IMAGES OF THE

                                                                                                                      PROJECT

                                                                                                                      Images of the project

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                      Fig214 Power supply circuit

                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      Fig228 coin operated mobile battery charger project presentation

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                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      CHAPTER 22

                                                                                                                      BIBILOGRAPHY

                                                                                                                      BIBLIOGRAPHY

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                      BOOKS

                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                      INTERNET LINKS

                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                      • CHAPTER 1

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 60

                                                                                                                        4

                                                                                                                        flag11==1

                                                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                                                        flag11=1

                                                                                                                        My delay (10)

                                                                                                                        flag3=1 disp3=1 k3=0

                                                                                                                        k1==0||k2==0||k4==0

                                                                                                                        Sw3_op (P02) ==0

                                                                                                                        5

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                        flag5==1

                                                                                                                        5

                                                                                                                        flag11==1

                                                                                                                        flag7=1

                                                                                                                        flag7==1

                                                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                                                        6

                                                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                        flag11=0 flag4=0 REady_LED4=0

                                                                                                                        flag11=1

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                        6

                                                                                                                        My delay (10)

                                                                                                                        flag4=1 disp4=1 k4=0

                                                                                                                        k1==0||k2==0||k3==0 flag5==1

                                                                                                                        7

                                                                                                                        Sw4_op (P03) ==0

                                                                                                                        flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                        7

                                                                                                                        flag7==1

                                                                                                                        flag9==1

                                                                                                                        flag7=1

                                                                                                                        flag7=0 flag2=0 REady_LED2=0

                                                                                                                        flag9=0 flag3=0 REady_LED3=0

                                                                                                                        flag9=1

                                                                                                                        Sw5_op A(P04) ==0

                                                                                                                        My delay (10)

                                                                                                                        8

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                        9

                                                                                                                        flag2==1

                                                                                                                        flag3==1

                                                                                                                        8

                                                                                                                        flag1==1

                                                                                                                        flag4==1 flag5=1 disp5=1

                                                                                                                        flag9=1 disp5=1

                                                                                                                        flag7=1 disp5=1

                                                                                                                        flag11=1 disp5=1

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                        Sw6_op (P05) ==0

                                                                                                                        My delay (10)

                                                                                                                        flag2==1 ampamp flag7==1

                                                                                                                        flag3==1 ampamp flag9==1 9

                                                                                                                        flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                        flag8=1 disp6=1

                                                                                                                        10

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                        10

                                                                                                                        flag4==1 ampamp flag11==1

                                                                                                                        flag10=1 disp6=1

                                                                                                                        flag12=1 disp6=1

                                                                                                                        flag8==1

                                                                                                                        flag10==1

                                                                                                                        11

                                                                                                                        flag6==1

                                                                                                                        i++

                                                                                                                        l++

                                                                                                                        j++

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                        flag12==1

                                                                                                                        M++

                                                                                                                        11

                                                                                                                        Stop

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        122 Program

                                                                                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                        define buzzerP2_0 buzzer indication

                                                                                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                        output Led for indication

                                                                                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                        function prototype declaration

                                                                                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                        void init_timer() timer 0 initialization function

                                                                                                                        variable declaration

                                                                                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        start of main programme

                                                                                                                        void main()

                                                                                                                        init_timer() call it timer initialization function

                                                                                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                        start of while loop

                                                                                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                        condition for switch1

                                                                                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                        if(iltk) loop will repeat for desired time of charging

                                                                                                                        if(igt=1000)

                                                                                                                        buzzer=1 turn on buzzer if (ii==20)

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                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        REady_LED1=1 turn on ready indication of led1

                                                                                                                        else if(ii==40)

                                                                                                                        REady_LED1=0ii=0

                                                                                                                        elseREady_LED1=0

                                                                                                                        START_LED1=1

                                                                                                                        else

                                                                                                                        START_LED1=0

                                                                                                                        k1=1 buzzer=0

                                                                                                                        REady_LED1=0 flag1=0

                                                                                                                        flag5=0flag6=0

                                                                                                                        condition for switch2

                                                                                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                        REady_LED2=1 turn on ready 2 led indication

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        disp2=0

                                                                                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                        if(jltk)

                                                                                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                        elseREady_LED2=0

                                                                                                                        START_LED2=1

                                                                                                                        else START_LED2=0

                                                                                                                        REady_LED2=0 k2=1 buzzer=0

                                                                                                                        flag2=0flag7=0flag8=0

                                                                                                                        j=0jj=0

                                                                                                                        condition for switch 3

                                                                                                                        if(flag3==1) check swich3 pressed

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        if(disp3==1 )

                                                                                                                        REady_LED3=1 disp3=0

                                                                                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                        if(lltk)

                                                                                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                        elseREady_LED3=0

                                                                                                                        START_LED3=1

                                                                                                                        else START_LED3=0

                                                                                                                        LED2=0 k3=1 buzzer=0

                                                                                                                        REady_LED3=0 flag3=0

                                                                                                                        flag9=0flag10=0

                                                                                                                        l=0ll=0

                                                                                                                        condition for switch 4

                                                                                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        REady_LED4=1 disp4=0

                                                                                                                        if(flag11==1) check coin is pressed

                                                                                                                        if(flag12==1) START is pressed

                                                                                                                        if(mltk)

                                                                                                                        if(mgt1000)

                                                                                                                        buzzer=1 if(mm==20)

                                                                                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                        elseREady_LED4=0

                                                                                                                        START_LED4=1

                                                                                                                        else START_LED4=0

                                                                                                                        buzzer=0 k4=1

                                                                                                                        REady_LED4=0 flag4=0

                                                                                                                        flag11=0flag12=0

                                                                                                                        m=0mm=0

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        while(1)

                                                                                                                        end of main programme

                                                                                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                        whenever specific time the interrupt will generate control will go in following function

                                                                                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if(sw1_op==0 ) ready switch flag for system1

                                                                                                                        my_delay(10) CALL DELAY FUNCTION

                                                                                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                        if(flag7==1) SET THE FLAG

                                                                                                                        flag7=1

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                        flag9=1

                                                                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                        flag11=1

                                                                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                                                                        my_delay (10)

                                                                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                        if(flag5==1)

                                                                                                                        flag5=1

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                        flag9=1

                                                                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                        flag11=1

                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                        if(flag7==1)

                                                                                                                        flag7=1

                                                                                                                        else

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                        flag5=1

                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                        flag11=1

                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                        if(flag7==1)

                                                                                                                        flag7=1

                                                                                                                        elseflag7=0

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                        flag5=1

                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                        flag9=1

                                                                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                        if(flag6==1)

                                                                                                                        i++ if (igt1000) ii++

                                                                                                                        if (flag8==1)

                                                                                                                        j++ if(jgt1000) jj++

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        if (flag10==1)

                                                                                                                        l++ if (lgt1000) ll++

                                                                                                                        if (flag12==1)

                                                                                                                        m++ if (mgt1000) mm++

                                                                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        CHAPTER 13

                                                                                                                        TROUBLE SHOOT

                                                                                                                        Troubleshoot

                                                                                                                        131 TROUBLE SHOOT

                                                                                                                        A newly assembled circuit does not work may be due to -

                                                                                                                        Faulty components

                                                                                                                        Improper soldering

                                                                                                                        Wrong connections

                                                                                                                        Also any stop in working after some period may be due to -

                                                                                                                        Component failure

                                                                                                                        Supply failure

                                                                                                                        Damaging of PCB

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                        proper soldering

                                                                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                        Resistance measurement is also done which is known as Dry test

                                                                                                                        During this project work some green LEDs was not glow then we checked it

                                                                                                                        continuity and replace it

                                                                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                                                                        during soldering PCB We solved that problem

                                                                                                                        CHAPTER 14

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        ADVANTAGES OF

                                                                                                                        THE PROJECT

                                                                                                                        Advantages

                                                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                                                        Simple and hand efficient Microcontroller based system

                                                                                                                        Fast charging capacity

                                                                                                                        Simple to operate

                                                                                                                        Ease of mobility

                                                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                                                        Less expensive

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Reduced man power

                                                                                                                        Low power consumption

                                                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                        CHAPTER 15

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        DISADVANTAGES

                                                                                                                        OF THE PROJECT

                                                                                                                        Disadvantages

                                                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                                                        It requires mains supply to work project

                                                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                        min

                                                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                                                        CHAPTER 16

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        APPLICATIONS OF

                                                                                                                        THE PROJECT

                                                                                                                        Application

                                                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                        charge for the mobile phone in any places

                                                                                                                        It is used for emergency charging purposes

                                                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                                                        places

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                        any location where there is a high footfall creating a large number of

                                                                                                                        potential users

                                                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                                                        CHAPTER 17

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        FUTURE

                                                                                                                        DEVELOPMENT OF

                                                                                                                        THE PROJECT

                                                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                                                        condition in public places

                                                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                        It will provide battery backup for make it portable

                                                                                                                        It will also provide SMS system in future

                                                                                                                        We can also increase the charging time by editing software of the project

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        CHAPTER 18

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        COST ANALYSIS

                                                                                                                        OF THE PROJECT

                                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                                        1811 Component list for power supply card

                                                                                                                        Footprint Quantity Designators Rate

                                                                                                                        Resistor

                                                                                                                        22K 1 R2 1

                                                                                                                        1K 1 R1 1

                                                                                                                        Capacitor

                                                                                                                        1000uf25V 1 C5 10

                                                                                                                        2200uf25V 1 C1 10

                                                                                                                        022uf 2 C6 C2 1

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                        Table 1811 Component list for power supply card

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        01uf 2 C4 C3 1

                                                                                                                        IC

                                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                                        Connector

                                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                                        Heat sink (TO-220) 2 16

                                                                                                                        Total 955

                                                                                                                        1812 Component list for battery charger card

                                                                                                                        Footprint Quantity Rate

                                                                                                                        Capacitor

                                                                                                                        2200uf25V 1 1000

                                                                                                                        022uf 4 100

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        01uf 4 100

                                                                                                                        IC

                                                                                                                        BRIDGE W10 1 500

                                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                                        Connector

                                                                                                                        CON PHO 2PIN 1 800

                                                                                                                        Relimate 2 pin 1 400

                                                                                                                        relimate 3 pin 4 2000

                                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                                        TOTAL 9300

                                                                                                                        1813 Component list for Relay card

                                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                        Table 1812Component list for battery charger card

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                        Total 18900

                                                                                                                        1814Component list for controller card

                                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                        Table 1813Component list for relay card

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                        total 27000

                                                                                                                        1815 Miscellaneous material

                                                                                                                        Material Quantity Rate

                                                                                                                        electronic item

                                                                                                                        Transformer

                                                                                                                        TXR1 0-9-15 1 20000

                                                                                                                        0-9 1A

                                                                                                                        0-15 100mA

                                                                                                                        TXR2 0-9 1 16500

                                                                                                                        0-9 1A

                                                                                                                        Proximity switch 1 20000

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                        Table 1814Component list for microcontroller card

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Red push bottom 4 4000

                                                                                                                        Green push button 1 1000

                                                                                                                        Red led 5mm 4 800

                                                                                                                        Green led 5mm 4 800

                                                                                                                        Led holder 8 1600

                                                                                                                        Copper clad 2 4000

                                                                                                                        3 core cable 1 meter 1500

                                                                                                                        3 pin plug 1 3000

                                                                                                                        2 pin relimate wire 19 9000

                                                                                                                        3 pin relimate wire 5 3750

                                                                                                                        4 pin relimate wire 2 2000

                                                                                                                        mechanical items

                                                                                                                        Enclosure 1 25000

                                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                                        12mm cable gland 1 1000

                                                                                                                        Screw 3mm 33 2000

                                                                                                                        Screw 35mm 6 2400

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        10 mm spacers 100 1500

                                                                                                                        10mm insert to stud 50 10000

                                                                                                                        cable tie 2500

                                                                                                                        Total 162350

                                                                                                                        CHAPTER 19

                                                                                                                        APPENDIX

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        APPENDIX

                                                                                                                        191 APPENDIX

                                                                                                                        1911 78xx IC datasheet

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        1912 W10 datasheet

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        1913 4n33 IC datasheet

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                        1914 MAX 232

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        CHAPTER 20

                                                                                                                        CONCLUSION

                                                                                                                        CONCLUSION

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        201 CONCLUSION

                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                        installed in any business premises

                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        CHAPTER 21

                                                                                                                        IMAGES OF THE

                                                                                                                        PROJECT

                                                                                                                        Images of the project

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                        Fig214 Power supply circuit

                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        CHAPTER 22

                                                                                                                        BIBILOGRAPHY

                                                                                                                        BIBLIOGRAPHY

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                        BOOKS

                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                        INTERNET LINKS

                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                        • CHAPTER 1

                                                                                                                          4

                                                                                                                          flag11==1

                                                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                                                          flag11=1

                                                                                                                          My delay (10)

                                                                                                                          flag3=1 disp3=1 k3=0

                                                                                                                          k1==0||k2==0||k4==0

                                                                                                                          Sw3_op (P02) ==0

                                                                                                                          5

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 61

                                                                                                                          flag5==1

                                                                                                                          5

                                                                                                                          flag11==1

                                                                                                                          flag7=1

                                                                                                                          flag7==1

                                                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                                                          6

                                                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                          flag11=0 flag4=0 REady_LED4=0

                                                                                                                          flag11=1

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                          6

                                                                                                                          My delay (10)

                                                                                                                          flag4=1 disp4=1 k4=0

                                                                                                                          k1==0||k2==0||k3==0 flag5==1

                                                                                                                          7

                                                                                                                          Sw4_op (P03) ==0

                                                                                                                          flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                          7

                                                                                                                          flag7==1

                                                                                                                          flag9==1

                                                                                                                          flag7=1

                                                                                                                          flag7=0 flag2=0 REady_LED2=0

                                                                                                                          flag9=0 flag3=0 REady_LED3=0

                                                                                                                          flag9=1

                                                                                                                          Sw5_op A(P04) ==0

                                                                                                                          My delay (10)

                                                                                                                          8

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                          9

                                                                                                                          flag2==1

                                                                                                                          flag3==1

                                                                                                                          8

                                                                                                                          flag1==1

                                                                                                                          flag4==1 flag5=1 disp5=1

                                                                                                                          flag9=1 disp5=1

                                                                                                                          flag7=1 disp5=1

                                                                                                                          flag11=1 disp5=1

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                          Sw6_op (P05) ==0

                                                                                                                          My delay (10)

                                                                                                                          flag2==1 ampamp flag7==1

                                                                                                                          flag3==1 ampamp flag9==1 9

                                                                                                                          flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                          flag8=1 disp6=1

                                                                                                                          10

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                          10

                                                                                                                          flag4==1 ampamp flag11==1

                                                                                                                          flag10=1 disp6=1

                                                                                                                          flag12=1 disp6=1

                                                                                                                          flag8==1

                                                                                                                          flag10==1

                                                                                                                          11

                                                                                                                          flag6==1

                                                                                                                          i++

                                                                                                                          l++

                                                                                                                          j++

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                          flag12==1

                                                                                                                          M++

                                                                                                                          11

                                                                                                                          Stop

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          122 Program

                                                                                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                          define buzzerP2_0 buzzer indication

                                                                                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                          output Led for indication

                                                                                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                          function prototype declaration

                                                                                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                          void init_timer() timer 0 initialization function

                                                                                                                          variable declaration

                                                                                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          start of main programme

                                                                                                                          void main()

                                                                                                                          init_timer() call it timer initialization function

                                                                                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                          start of while loop

                                                                                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                          condition for switch1

                                                                                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                          if(iltk) loop will repeat for desired time of charging

                                                                                                                          if(igt=1000)

                                                                                                                          buzzer=1 turn on buzzer if (ii==20)

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          REady_LED1=1 turn on ready indication of led1

                                                                                                                          else if(ii==40)

                                                                                                                          REady_LED1=0ii=0

                                                                                                                          elseREady_LED1=0

                                                                                                                          START_LED1=1

                                                                                                                          else

                                                                                                                          START_LED1=0

                                                                                                                          k1=1 buzzer=0

                                                                                                                          REady_LED1=0 flag1=0

                                                                                                                          flag5=0flag6=0

                                                                                                                          condition for switch2

                                                                                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                          REady_LED2=1 turn on ready 2 led indication

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          disp2=0

                                                                                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                          if(jltk)

                                                                                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                          elseREady_LED2=0

                                                                                                                          START_LED2=1

                                                                                                                          else START_LED2=0

                                                                                                                          REady_LED2=0 k2=1 buzzer=0

                                                                                                                          flag2=0flag7=0flag8=0

                                                                                                                          j=0jj=0

                                                                                                                          condition for switch 3

                                                                                                                          if(flag3==1) check swich3 pressed

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          if(disp3==1 )

                                                                                                                          REady_LED3=1 disp3=0

                                                                                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                          if(lltk)

                                                                                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                          elseREady_LED3=0

                                                                                                                          START_LED3=1

                                                                                                                          else START_LED3=0

                                                                                                                          LED2=0 k3=1 buzzer=0

                                                                                                                          REady_LED3=0 flag3=0

                                                                                                                          flag9=0flag10=0

                                                                                                                          l=0ll=0

                                                                                                                          condition for switch 4

                                                                                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          REady_LED4=1 disp4=0

                                                                                                                          if(flag11==1) check coin is pressed

                                                                                                                          if(flag12==1) START is pressed

                                                                                                                          if(mltk)

                                                                                                                          if(mgt1000)

                                                                                                                          buzzer=1 if(mm==20)

                                                                                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                          elseREady_LED4=0

                                                                                                                          START_LED4=1

                                                                                                                          else START_LED4=0

                                                                                                                          buzzer=0 k4=1

                                                                                                                          REady_LED4=0 flag4=0

                                                                                                                          flag11=0flag12=0

                                                                                                                          m=0mm=0

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          while(1)

                                                                                                                          end of main programme

                                                                                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                          whenever specific time the interrupt will generate control will go in following function

                                                                                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if(sw1_op==0 ) ready switch flag for system1

                                                                                                                          my_delay(10) CALL DELAY FUNCTION

                                                                                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                          if(flag7==1) SET THE FLAG

                                                                                                                          flag7=1

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                          flag9=1

                                                                                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                          flag11=1

                                                                                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if(sw2_op==0 ) fready switch flag for system2

                                                                                                                          my_delay (10)

                                                                                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                          if(flag5==1)

                                                                                                                          flag5=1

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                          flag9=1

                                                                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                          flag11=1

                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                          if(flag7==1)

                                                                                                                          flag7=1

                                                                                                                          else

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                          flag5=1

                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                          flag11=1

                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                          if(flag7==1)

                                                                                                                          flag7=1

                                                                                                                          elseflag7=0

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                          flag5=1

                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                          flag9=1

                                                                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                          if(flag6==1)

                                                                                                                          i++ if (igt1000) ii++

                                                                                                                          if (flag8==1)

                                                                                                                          j++ if(jgt1000) jj++

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          if (flag10==1)

                                                                                                                          l++ if (lgt1000) ll++

                                                                                                                          if (flag12==1)

                                                                                                                          m++ if (mgt1000) mm++

                                                                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          CHAPTER 13

                                                                                                                          TROUBLE SHOOT

                                                                                                                          Troubleshoot

                                                                                                                          131 TROUBLE SHOOT

                                                                                                                          A newly assembled circuit does not work may be due to -

                                                                                                                          Faulty components

                                                                                                                          Improper soldering

                                                                                                                          Wrong connections

                                                                                                                          Also any stop in working after some period may be due to -

                                                                                                                          Component failure

                                                                                                                          Supply failure

                                                                                                                          Damaging of PCB

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                          proper soldering

                                                                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                          Resistance measurement is also done which is known as Dry test

                                                                                                                          During this project work some green LEDs was not glow then we checked it

                                                                                                                          continuity and replace it

                                                                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                                                                          during soldering PCB We solved that problem

                                                                                                                          CHAPTER 14

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          ADVANTAGES OF

                                                                                                                          THE PROJECT

                                                                                                                          Advantages

                                                                                                                          141 ADVANTAGES OF THE PROJECT

                                                                                                                          Simple and hand efficient Microcontroller based system

                                                                                                                          Fast charging capacity

                                                                                                                          Simple to operate

                                                                                                                          Ease of mobility

                                                                                                                          Facilitates connectivity for 90 of cellular phones

                                                                                                                          Less expensive

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Reduced man power

                                                                                                                          Low power consumption

                                                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                          CHAPTER 15

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          DISADVANTAGES

                                                                                                                          OF THE PROJECT

                                                                                                                          Disadvantages

                                                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                                                          It requires mains supply to work project

                                                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                          min

                                                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                                                          CHAPTER 16

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          APPLICATIONS OF

                                                                                                                          THE PROJECT

                                                                                                                          Application

                                                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                          charge for the mobile phone in any places

                                                                                                                          It is used for emergency charging purposes

                                                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                                                          places

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                          any location where there is a high footfall creating a large number of

                                                                                                                          potential users

                                                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                                                          CHAPTER 17

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          FUTURE

                                                                                                                          DEVELOPMENT OF

                                                                                                                          THE PROJECT

                                                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                                                          condition in public places

                                                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                          It will provide battery backup for make it portable

                                                                                                                          It will also provide SMS system in future

                                                                                                                          We can also increase the charging time by editing software of the project

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          CHAPTER 18

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          COST ANALYSIS

                                                                                                                          OF THE PROJECT

                                                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                                                          1811 Component list for power supply card

                                                                                                                          Footprint Quantity Designators Rate

                                                                                                                          Resistor

                                                                                                                          22K 1 R2 1

                                                                                                                          1K 1 R1 1

                                                                                                                          Capacitor

                                                                                                                          1000uf25V 1 C5 10

                                                                                                                          2200uf25V 1 C1 10

                                                                                                                          022uf 2 C6 C2 1

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                          Table 1811 Component list for power supply card

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          01uf 2 C4 C3 1

                                                                                                                          IC

                                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                                          Connector

                                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                                          Heat sink (TO-220) 2 16

                                                                                                                          Total 955

                                                                                                                          1812 Component list for battery charger card

                                                                                                                          Footprint Quantity Rate

                                                                                                                          Capacitor

                                                                                                                          2200uf25V 1 1000

                                                                                                                          022uf 4 100

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          01uf 4 100

                                                                                                                          IC

                                                                                                                          BRIDGE W10 1 500

                                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                                          Connector

                                                                                                                          CON PHO 2PIN 1 800

                                                                                                                          Relimate 2 pin 1 400

                                                                                                                          relimate 3 pin 4 2000

                                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                                          TOTAL 9300

                                                                                                                          1813 Component list for Relay card

                                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                          Table 1812Component list for battery charger card

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                          Total 18900

                                                                                                                          1814Component list for controller card

                                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                          Table 1813Component list for relay card

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                          total 27000

                                                                                                                          1815 Miscellaneous material

                                                                                                                          Material Quantity Rate

                                                                                                                          electronic item

                                                                                                                          Transformer

                                                                                                                          TXR1 0-9-15 1 20000

                                                                                                                          0-9 1A

                                                                                                                          0-15 100mA

                                                                                                                          TXR2 0-9 1 16500

                                                                                                                          0-9 1A

                                                                                                                          Proximity switch 1 20000

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                          Table 1814Component list for microcontroller card

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Red push bottom 4 4000

                                                                                                                          Green push button 1 1000

                                                                                                                          Red led 5mm 4 800

                                                                                                                          Green led 5mm 4 800

                                                                                                                          Led holder 8 1600

                                                                                                                          Copper clad 2 4000

                                                                                                                          3 core cable 1 meter 1500

                                                                                                                          3 pin plug 1 3000

                                                                                                                          2 pin relimate wire 19 9000

                                                                                                                          3 pin relimate wire 5 3750

                                                                                                                          4 pin relimate wire 2 2000

                                                                                                                          mechanical items

                                                                                                                          Enclosure 1 25000

                                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                                          12mm cable gland 1 1000

                                                                                                                          Screw 3mm 33 2000

                                                                                                                          Screw 35mm 6 2400

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          10 mm spacers 100 1500

                                                                                                                          10mm insert to stud 50 10000

                                                                                                                          cable tie 2500

                                                                                                                          Total 162350

                                                                                                                          CHAPTER 19

                                                                                                                          APPENDIX

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          APPENDIX

                                                                                                                          191 APPENDIX

                                                                                                                          1911 78xx IC datasheet

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          1912 W10 datasheet

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          1913 4n33 IC datasheet

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                          1914 MAX 232

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          CHAPTER 20

                                                                                                                          CONCLUSION

                                                                                                                          CONCLUSION

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          201 CONCLUSION

                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                          installed in any business premises

                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          CHAPTER 21

                                                                                                                          IMAGES OF THE

                                                                                                                          PROJECT

                                                                                                                          Images of the project

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                          Fig214 Power supply circuit

                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          CHAPTER 22

                                                                                                                          BIBILOGRAPHY

                                                                                                                          BIBLIOGRAPHY

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                          BOOKS

                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                          INTERNET LINKS

                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                          • CHAPTER 1

                                                                                                                            flag5==1

                                                                                                                            5

                                                                                                                            flag11==1

                                                                                                                            flag7=1

                                                                                                                            flag7==1

                                                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                                                            6

                                                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0 REady_LED1=0

                                                                                                                            flag11=0 flag4=0 REady_LED4=0

                                                                                                                            flag11=1

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 62

                                                                                                                            6

                                                                                                                            My delay (10)

                                                                                                                            flag4=1 disp4=1 k4=0

                                                                                                                            k1==0||k2==0||k3==0 flag5==1

                                                                                                                            7

                                                                                                                            Sw4_op (P03) ==0

                                                                                                                            flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                            7

                                                                                                                            flag7==1

                                                                                                                            flag9==1

                                                                                                                            flag7=1

                                                                                                                            flag7=0 flag2=0 REady_LED2=0

                                                                                                                            flag9=0 flag3=0 REady_LED3=0

                                                                                                                            flag9=1

                                                                                                                            Sw5_op A(P04) ==0

                                                                                                                            My delay (10)

                                                                                                                            8

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                            9

                                                                                                                            flag2==1

                                                                                                                            flag3==1

                                                                                                                            8

                                                                                                                            flag1==1

                                                                                                                            flag4==1 flag5=1 disp5=1

                                                                                                                            flag9=1 disp5=1

                                                                                                                            flag7=1 disp5=1

                                                                                                                            flag11=1 disp5=1

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                            Sw6_op (P05) ==0

                                                                                                                            My delay (10)

                                                                                                                            flag2==1 ampamp flag7==1

                                                                                                                            flag3==1 ampamp flag9==1 9

                                                                                                                            flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                            flag8=1 disp6=1

                                                                                                                            10

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                            10

                                                                                                                            flag4==1 ampamp flag11==1

                                                                                                                            flag10=1 disp6=1

                                                                                                                            flag12=1 disp6=1

                                                                                                                            flag8==1

                                                                                                                            flag10==1

                                                                                                                            11

                                                                                                                            flag6==1

                                                                                                                            i++

                                                                                                                            l++

                                                                                                                            j++

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                            flag12==1

                                                                                                                            M++

                                                                                                                            11

                                                                                                                            Stop

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            122 Program

                                                                                                                            includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                            define buzzerP2_0 buzzer indication

                                                                                                                            setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                            sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                            sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                            output Led for indication

                                                                                                                            sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                            sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                            function prototype declaration

                                                                                                                            void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                            void init_timer() timer 0 initialization function

                                                                                                                            variable declaration

                                                                                                                            bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

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                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            start of main programme

                                                                                                                            void main()

                                                                                                                            init_timer() call it timer initialization function

                                                                                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                            start of while loop

                                                                                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                            condition for switch1

                                                                                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                            if(iltk) loop will repeat for desired time of charging

                                                                                                                            if(igt=1000)

                                                                                                                            buzzer=1 turn on buzzer if (ii==20)

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                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            REady_LED1=1 turn on ready indication of led1

                                                                                                                            else if(ii==40)

                                                                                                                            REady_LED1=0ii=0

                                                                                                                            elseREady_LED1=0

                                                                                                                            START_LED1=1

                                                                                                                            else

                                                                                                                            START_LED1=0

                                                                                                                            k1=1 buzzer=0

                                                                                                                            REady_LED1=0 flag1=0

                                                                                                                            flag5=0flag6=0

                                                                                                                            condition for switch2

                                                                                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                            REady_LED2=1 turn on ready 2 led indication

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            disp2=0

                                                                                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                            if(jltk)

                                                                                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                            elseREady_LED2=0

                                                                                                                            START_LED2=1

                                                                                                                            else START_LED2=0

                                                                                                                            REady_LED2=0 k2=1 buzzer=0

                                                                                                                            flag2=0flag7=0flag8=0

                                                                                                                            j=0jj=0

                                                                                                                            condition for switch 3

                                                                                                                            if(flag3==1) check swich3 pressed

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            if(disp3==1 )

                                                                                                                            REady_LED3=1 disp3=0

                                                                                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                            if(lltk)

                                                                                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                            elseREady_LED3=0

                                                                                                                            START_LED3=1

                                                                                                                            else START_LED3=0

                                                                                                                            LED2=0 k3=1 buzzer=0

                                                                                                                            REady_LED3=0 flag3=0

                                                                                                                            flag9=0flag10=0

                                                                                                                            l=0ll=0

                                                                                                                            condition for switch 4

                                                                                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            REady_LED4=1 disp4=0

                                                                                                                            if(flag11==1) check coin is pressed

                                                                                                                            if(flag12==1) START is pressed

                                                                                                                            if(mltk)

                                                                                                                            if(mgt1000)

                                                                                                                            buzzer=1 if(mm==20)

                                                                                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                            elseREady_LED4=0

                                                                                                                            START_LED4=1

                                                                                                                            else START_LED4=0

                                                                                                                            buzzer=0 k4=1

                                                                                                                            REady_LED4=0 flag4=0

                                                                                                                            flag11=0flag12=0

                                                                                                                            m=0mm=0

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                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            while(1)

                                                                                                                            end of main programme

                                                                                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                            whenever specific time the interrupt will generate control will go in following function

                                                                                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if(sw1_op==0 ) ready switch flag for system1

                                                                                                                            my_delay(10) CALL DELAY FUNCTION

                                                                                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                            if(flag7==1) SET THE FLAG

                                                                                                                            flag7=1

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                            flag9=1

                                                                                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                            flag11=1

                                                                                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if(sw2_op==0 ) fready switch flag for system2

                                                                                                                            my_delay (10)

                                                                                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                            if(flag5==1)

                                                                                                                            flag5=1

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                            flag9=1

                                                                                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                            flag11=1

                                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                            if(flag7==1)

                                                                                                                            flag7=1

                                                                                                                            else

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                            flag5=1

                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                            flag11=1

                                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                            if(flag7==1)

                                                                                                                            flag7=1

                                                                                                                            elseflag7=0

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                            flag5=1

                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                            flag9=1

                                                                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                            if(flag6==1)

                                                                                                                            i++ if (igt1000) ii++

                                                                                                                            if (flag8==1)

                                                                                                                            j++ if(jgt1000) jj++

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            if (flag10==1)

                                                                                                                            l++ if (lgt1000) ll++

                                                                                                                            if (flag12==1)

                                                                                                                            m++ if (mgt1000) mm++

                                                                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            CHAPTER 13

                                                                                                                            TROUBLE SHOOT

                                                                                                                            Troubleshoot

                                                                                                                            131 TROUBLE SHOOT

                                                                                                                            A newly assembled circuit does not work may be due to -

                                                                                                                            Faulty components

                                                                                                                            Improper soldering

                                                                                                                            Wrong connections

                                                                                                                            Also any stop in working after some period may be due to -

                                                                                                                            Component failure

                                                                                                                            Supply failure

                                                                                                                            Damaging of PCB

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                            proper soldering

                                                                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                            Resistance measurement is also done which is known as Dry test

                                                                                                                            During this project work some green LEDs was not glow then we checked it

                                                                                                                            continuity and replace it

                                                                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                                                                            during soldering PCB We solved that problem

                                                                                                                            CHAPTER 14

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            ADVANTAGES OF

                                                                                                                            THE PROJECT

                                                                                                                            Advantages

                                                                                                                            141 ADVANTAGES OF THE PROJECT

                                                                                                                            Simple and hand efficient Microcontroller based system

                                                                                                                            Fast charging capacity

                                                                                                                            Simple to operate

                                                                                                                            Ease of mobility

                                                                                                                            Facilitates connectivity for 90 of cellular phones

                                                                                                                            Less expensive

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Reduced man power

                                                                                                                            Low power consumption

                                                                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                            CHAPTER 15

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            DISADVANTAGES

                                                                                                                            OF THE PROJECT

                                                                                                                            Disadvantages

                                                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                                                            It requires mains supply to work project

                                                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                            min

                                                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                                                            CHAPTER 16

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            APPLICATIONS OF

                                                                                                                            THE PROJECT

                                                                                                                            Application

                                                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                            charge for the mobile phone in any places

                                                                                                                            It is used for emergency charging purposes

                                                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                                                            places

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                            any location where there is a high footfall creating a large number of

                                                                                                                            potential users

                                                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                                                            CHAPTER 17

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            FUTURE

                                                                                                                            DEVELOPMENT OF

                                                                                                                            THE PROJECT

                                                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                                                            condition in public places

                                                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                            It will provide battery backup for make it portable

                                                                                                                            It will also provide SMS system in future

                                                                                                                            We can also increase the charging time by editing software of the project

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            CHAPTER 18

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            COST ANALYSIS

                                                                                                                            OF THE PROJECT

                                                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                                                            1811 Component list for power supply card

                                                                                                                            Footprint Quantity Designators Rate

                                                                                                                            Resistor

                                                                                                                            22K 1 R2 1

                                                                                                                            1K 1 R1 1

                                                                                                                            Capacitor

                                                                                                                            1000uf25V 1 C5 10

                                                                                                                            2200uf25V 1 C1 10

                                                                                                                            022uf 2 C6 C2 1

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                            Table 1811 Component list for power supply card

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            01uf 2 C4 C3 1

                                                                                                                            IC

                                                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                                                            Connector

                                                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                                                            CON PHO 3PIN 1 J1 12

                                                                                                                            LED3mm red 2 L1 L2 15

                                                                                                                            Heat sink (TO-220) 2 16

                                                                                                                            Total 955

                                                                                                                            1812 Component list for battery charger card

                                                                                                                            Footprint Quantity Rate

                                                                                                                            Capacitor

                                                                                                                            2200uf25V 1 1000

                                                                                                                            022uf 4 100

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            01uf 4 100

                                                                                                                            IC

                                                                                                                            BRIDGE W10 1 500

                                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                                            Connector

                                                                                                                            CON PHO 2PIN 1 800

                                                                                                                            Relimate 2 pin 1 400

                                                                                                                            relimate 3 pin 4 2000

                                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                                            TOTAL 9300

                                                                                                                            1813 Component list for Relay card

                                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                            Table 1812Component list for battery charger card

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                            Total 18900

                                                                                                                            1814Component list for controller card

                                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                            Table 1813Component list for relay card

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                            total 27000

                                                                                                                            1815 Miscellaneous material

                                                                                                                            Material Quantity Rate

                                                                                                                            electronic item

                                                                                                                            Transformer

                                                                                                                            TXR1 0-9-15 1 20000

                                                                                                                            0-9 1A

                                                                                                                            0-15 100mA

                                                                                                                            TXR2 0-9 1 16500

                                                                                                                            0-9 1A

                                                                                                                            Proximity switch 1 20000

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                            Table 1814Component list for microcontroller card

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Red push bottom 4 4000

                                                                                                                            Green push button 1 1000

                                                                                                                            Red led 5mm 4 800

                                                                                                                            Green led 5mm 4 800

                                                                                                                            Led holder 8 1600

                                                                                                                            Copper clad 2 4000

                                                                                                                            3 core cable 1 meter 1500

                                                                                                                            3 pin plug 1 3000

                                                                                                                            2 pin relimate wire 19 9000

                                                                                                                            3 pin relimate wire 5 3750

                                                                                                                            4 pin relimate wire 2 2000

                                                                                                                            mechanical items

                                                                                                                            Enclosure 1 25000

                                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                                            12mm cable gland 1 1000

                                                                                                                            Screw 3mm 33 2000

                                                                                                                            Screw 35mm 6 2400

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            10 mm spacers 100 1500

                                                                                                                            10mm insert to stud 50 10000

                                                                                                                            cable tie 2500

                                                                                                                            Total 162350

                                                                                                                            CHAPTER 19

                                                                                                                            APPENDIX

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            APPENDIX

                                                                                                                            191 APPENDIX

                                                                                                                            1911 78xx IC datasheet

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            1912 W10 datasheet

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            1913 4n33 IC datasheet

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                            1914 MAX 232

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            CHAPTER 20

                                                                                                                            CONCLUSION

                                                                                                                            CONCLUSION

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            201 CONCLUSION

                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                            installed in any business premises

                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            CHAPTER 21

                                                                                                                            IMAGES OF THE

                                                                                                                            PROJECT

                                                                                                                            Images of the project

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                            Fig214 Power supply circuit

                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            CHAPTER 22

                                                                                                                            BIBILOGRAPHY

                                                                                                                            BIBLIOGRAPHY

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                            BOOKS

                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                            INTERNET LINKS

                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                            • CHAPTER 1

                                                                                                                              6

                                                                                                                              My delay (10)

                                                                                                                              flag4=1 disp4=1 k4=0

                                                                                                                              k1==0||k2==0||k3==0 flag5==1

                                                                                                                              7

                                                                                                                              Sw4_op (P03) ==0

                                                                                                                              flag5=1 flag5=0 flag1=0 REady_LED1=0

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 63

                                                                                                                              7

                                                                                                                              flag7==1

                                                                                                                              flag9==1

                                                                                                                              flag7=1

                                                                                                                              flag7=0 flag2=0 REady_LED2=0

                                                                                                                              flag9=0 flag3=0 REady_LED3=0

                                                                                                                              flag9=1

                                                                                                                              Sw5_op A(P04) ==0

                                                                                                                              My delay (10)

                                                                                                                              8

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                              9

                                                                                                                              flag2==1

                                                                                                                              flag3==1

                                                                                                                              8

                                                                                                                              flag1==1

                                                                                                                              flag4==1 flag5=1 disp5=1

                                                                                                                              flag9=1 disp5=1

                                                                                                                              flag7=1 disp5=1

                                                                                                                              flag11=1 disp5=1

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                              Sw6_op (P05) ==0

                                                                                                                              My delay (10)

                                                                                                                              flag2==1 ampamp flag7==1

                                                                                                                              flag3==1 ampamp flag9==1 9

                                                                                                                              flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                              flag8=1 disp6=1

                                                                                                                              10

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                              10

                                                                                                                              flag4==1 ampamp flag11==1

                                                                                                                              flag10=1 disp6=1

                                                                                                                              flag12=1 disp6=1

                                                                                                                              flag8==1

                                                                                                                              flag10==1

                                                                                                                              11

                                                                                                                              flag6==1

                                                                                                                              i++

                                                                                                                              l++

                                                                                                                              j++

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                              flag12==1

                                                                                                                              M++

                                                                                                                              11

                                                                                                                              Stop

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              122 Program

                                                                                                                              includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                              define buzzerP2_0 buzzer indication

                                                                                                                              setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                              sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                              sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                              output Led for indication

                                                                                                                              sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                              sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                              function prototype declaration

                                                                                                                              void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                              void init_timer() timer 0 initialization function

                                                                                                                              variable declaration

                                                                                                                              bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              start of main programme

                                                                                                                              void main()

                                                                                                                              init_timer() call it timer initialization function

                                                                                                                              REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                              START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                              start of while loop

                                                                                                                              while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                              condition for switch1

                                                                                                                              if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                              REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                              if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                              if(iltk) loop will repeat for desired time of charging

                                                                                                                              if(igt=1000)

                                                                                                                              buzzer=1 turn on buzzer if (ii==20)

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              REady_LED1=1 turn on ready indication of led1

                                                                                                                              else if(ii==40)

                                                                                                                              REady_LED1=0ii=0

                                                                                                                              elseREady_LED1=0

                                                                                                                              START_LED1=1

                                                                                                                              else

                                                                                                                              START_LED1=0

                                                                                                                              k1=1 buzzer=0

                                                                                                                              REady_LED1=0 flag1=0

                                                                                                                              flag5=0flag6=0

                                                                                                                              condition for switch2

                                                                                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                              REady_LED2=1 turn on ready 2 led indication

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              disp2=0

                                                                                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                              if(jltk)

                                                                                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                              elseREady_LED2=0

                                                                                                                              START_LED2=1

                                                                                                                              else START_LED2=0

                                                                                                                              REady_LED2=0 k2=1 buzzer=0

                                                                                                                              flag2=0flag7=0flag8=0

                                                                                                                              j=0jj=0

                                                                                                                              condition for switch 3

                                                                                                                              if(flag3==1) check swich3 pressed

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              if(disp3==1 )

                                                                                                                              REady_LED3=1 disp3=0

                                                                                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                              if(lltk)

                                                                                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                              elseREady_LED3=0

                                                                                                                              START_LED3=1

                                                                                                                              else START_LED3=0

                                                                                                                              LED2=0 k3=1 buzzer=0

                                                                                                                              REady_LED3=0 flag3=0

                                                                                                                              flag9=0flag10=0

                                                                                                                              l=0ll=0

                                                                                                                              condition for switch 4

                                                                                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              REady_LED4=1 disp4=0

                                                                                                                              if(flag11==1) check coin is pressed

                                                                                                                              if(flag12==1) START is pressed

                                                                                                                              if(mltk)

                                                                                                                              if(mgt1000)

                                                                                                                              buzzer=1 if(mm==20)

                                                                                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                              elseREady_LED4=0

                                                                                                                              START_LED4=1

                                                                                                                              else START_LED4=0

                                                                                                                              buzzer=0 k4=1

                                                                                                                              REady_LED4=0 flag4=0

                                                                                                                              flag11=0flag12=0

                                                                                                                              m=0mm=0

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              while(1)

                                                                                                                              end of main programme

                                                                                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                              whenever specific time the interrupt will generate control will go in following function

                                                                                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if(sw1_op==0 ) ready switch flag for system1

                                                                                                                              my_delay(10) CALL DELAY FUNCTION

                                                                                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                              if(flag7==1) SET THE FLAG

                                                                                                                              flag7=1

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                              flag9=1

                                                                                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                              flag11=1

                                                                                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if(sw2_op==0 ) fready switch flag for system2

                                                                                                                              my_delay (10)

                                                                                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                              if(flag5==1)

                                                                                                                              flag5=1

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                              flag9=1

                                                                                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                              flag11=1

                                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                              if(flag7==1)

                                                                                                                              flag7=1

                                                                                                                              else

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                              flag5=1

                                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                              flag11=1

                                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                              if(flag7==1)

                                                                                                                              flag7=1

                                                                                                                              elseflag7=0

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                              flag5=1

                                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                              flag9=1

                                                                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                              if(flag6==1)

                                                                                                                              i++ if (igt1000) ii++

                                                                                                                              if (flag8==1)

                                                                                                                              j++ if(jgt1000) jj++

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              if (flag10==1)

                                                                                                                              l++ if (lgt1000) ll++

                                                                                                                              if (flag12==1)

                                                                                                                              m++ if (mgt1000) mm++

                                                                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              CHAPTER 13

                                                                                                                              TROUBLE SHOOT

                                                                                                                              Troubleshoot

                                                                                                                              131 TROUBLE SHOOT

                                                                                                                              A newly assembled circuit does not work may be due to -

                                                                                                                              Faulty components

                                                                                                                              Improper soldering

                                                                                                                              Wrong connections

                                                                                                                              Also any stop in working after some period may be due to -

                                                                                                                              Component failure

                                                                                                                              Supply failure

                                                                                                                              Damaging of PCB

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                              proper soldering

                                                                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                              Resistance measurement is also done which is known as Dry test

                                                                                                                              During this project work some green LEDs was not glow then we checked it

                                                                                                                              continuity and replace it

                                                                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                                                                              during soldering PCB We solved that problem

                                                                                                                              CHAPTER 14

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              ADVANTAGES OF

                                                                                                                              THE PROJECT

                                                                                                                              Advantages

                                                                                                                              141 ADVANTAGES OF THE PROJECT

                                                                                                                              Simple and hand efficient Microcontroller based system

                                                                                                                              Fast charging capacity

                                                                                                                              Simple to operate

                                                                                                                              Ease of mobility

                                                                                                                              Facilitates connectivity for 90 of cellular phones

                                                                                                                              Less expensive

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Reduced man power

                                                                                                                              Low power consumption

                                                                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                              CHAPTER 15

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              DISADVANTAGES

                                                                                                                              OF THE PROJECT

                                                                                                                              Disadvantages

                                                                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                                                                              It requires mains supply to work project

                                                                                                                              Due to limited charging channels till now there may be a possibility that

                                                                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                              min

                                                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                                                              CHAPTER 16

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              APPLICATIONS OF

                                                                                                                              THE PROJECT

                                                                                                                              Application

                                                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                              charge for the mobile phone in any places

                                                                                                                              It is used for emergency charging purposes

                                                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                                                              places

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                              any location where there is a high footfall creating a large number of

                                                                                                                              potential users

                                                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                                                              CHAPTER 17

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              FUTURE

                                                                                                                              DEVELOPMENT OF

                                                                                                                              THE PROJECT

                                                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                                                              condition in public places

                                                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                              It will provide battery backup for make it portable

                                                                                                                              It will also provide SMS system in future

                                                                                                                              We can also increase the charging time by editing software of the project

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              CHAPTER 18

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              COST ANALYSIS

                                                                                                                              OF THE PROJECT

                                                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                                                              1811 Component list for power supply card

                                                                                                                              Footprint Quantity Designators Rate

                                                                                                                              Resistor

                                                                                                                              22K 1 R2 1

                                                                                                                              1K 1 R1 1

                                                                                                                              Capacitor

                                                                                                                              1000uf25V 1 C5 10

                                                                                                                              2200uf25V 1 C1 10

                                                                                                                              022uf 2 C6 C2 1

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                              Table 1811 Component list for power supply card

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              01uf 2 C4 C3 1

                                                                                                                              IC

                                                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                                                              Connector

                                                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                                                              CON PHO 3PIN 1 J1 12

                                                                                                                              LED3mm red 2 L1 L2 15

                                                                                                                              Heat sink (TO-220) 2 16

                                                                                                                              Total 955

                                                                                                                              1812 Component list for battery charger card

                                                                                                                              Footprint Quantity Rate

                                                                                                                              Capacitor

                                                                                                                              2200uf25V 1 1000

                                                                                                                              022uf 4 100

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              01uf 4 100

                                                                                                                              IC

                                                                                                                              BRIDGE W10 1 500

                                                                                                                              L7805CV (TO-220) 4 3200

                                                                                                                              Connector

                                                                                                                              CON PHO 2PIN 1 800

                                                                                                                              Relimate 2 pin 1 400

                                                                                                                              relimate 3 pin 4 2000

                                                                                                                              Heat sink (TO-220) 4 1200

                                                                                                                              TOTAL 9300

                                                                                                                              1813 Component list for Relay card

                                                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                              Table 1812Component list for battery charger card

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                              Total 18900

                                                                                                                              1814Component list for controller card

                                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                              Table 1813Component list for relay card

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                              total 27000

                                                                                                                              1815 Miscellaneous material

                                                                                                                              Material Quantity Rate

                                                                                                                              electronic item

                                                                                                                              Transformer

                                                                                                                              TXR1 0-9-15 1 20000

                                                                                                                              0-9 1A

                                                                                                                              0-15 100mA

                                                                                                                              TXR2 0-9 1 16500

                                                                                                                              0-9 1A

                                                                                                                              Proximity switch 1 20000

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                              Table 1814Component list for microcontroller card

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Red push bottom 4 4000

                                                                                                                              Green push button 1 1000

                                                                                                                              Red led 5mm 4 800

                                                                                                                              Green led 5mm 4 800

                                                                                                                              Led holder 8 1600

                                                                                                                              Copper clad 2 4000

                                                                                                                              3 core cable 1 meter 1500

                                                                                                                              3 pin plug 1 3000

                                                                                                                              2 pin relimate wire 19 9000

                                                                                                                              3 pin relimate wire 5 3750

                                                                                                                              4 pin relimate wire 2 2000

                                                                                                                              mechanical items

                                                                                                                              Enclosure 1 25000

                                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                                              12mm cable gland 1 1000

                                                                                                                              Screw 3mm 33 2000

                                                                                                                              Screw 35mm 6 2400

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              10 mm spacers 100 1500

                                                                                                                              10mm insert to stud 50 10000

                                                                                                                              cable tie 2500

                                                                                                                              Total 162350

                                                                                                                              CHAPTER 19

                                                                                                                              APPENDIX

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              APPENDIX

                                                                                                                              191 APPENDIX

                                                                                                                              1911 78xx IC datasheet

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              1912 W10 datasheet

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              1913 4n33 IC datasheet

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                              1914 MAX 232

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              CHAPTER 20

                                                                                                                              CONCLUSION

                                                                                                                              CONCLUSION

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              201 CONCLUSION

                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                              installed in any business premises

                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              CHAPTER 21

                                                                                                                              IMAGES OF THE

                                                                                                                              PROJECT

                                                                                                                              Images of the project

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                              Fig214 Power supply circuit

                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              CHAPTER 22

                                                                                                                              BIBILOGRAPHY

                                                                                                                              BIBLIOGRAPHY

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                              BOOKS

                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                              INTERNET LINKS

                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                              • CHAPTER 1

                                                                                                                                7

                                                                                                                                flag7==1

                                                                                                                                flag9==1

                                                                                                                                flag7=1

                                                                                                                                flag7=0 flag2=0 REady_LED2=0

                                                                                                                                flag9=0 flag3=0 REady_LED3=0

                                                                                                                                flag9=1

                                                                                                                                Sw5_op A(P04) ==0

                                                                                                                                My delay (10)

                                                                                                                                8

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 64

                                                                                                                                9

                                                                                                                                flag2==1

                                                                                                                                flag3==1

                                                                                                                                8

                                                                                                                                flag1==1

                                                                                                                                flag4==1 flag5=1 disp5=1

                                                                                                                                flag9=1 disp5=1

                                                                                                                                flag7=1 disp5=1

                                                                                                                                flag11=1 disp5=1

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                                Sw6_op (P05) ==0

                                                                                                                                My delay (10)

                                                                                                                                flag2==1 ampamp flag7==1

                                                                                                                                flag3==1 ampamp flag9==1 9

                                                                                                                                flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                                flag8=1 disp6=1

                                                                                                                                10

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                                10

                                                                                                                                flag4==1 ampamp flag11==1

                                                                                                                                flag10=1 disp6=1

                                                                                                                                flag12=1 disp6=1

                                                                                                                                flag8==1

                                                                                                                                flag10==1

                                                                                                                                11

                                                                                                                                flag6==1

                                                                                                                                i++

                                                                                                                                l++

                                                                                                                                j++

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                                flag12==1

                                                                                                                                M++

                                                                                                                                11

                                                                                                                                Stop

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                122 Program

                                                                                                                                includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                define buzzerP2_0 buzzer indication

                                                                                                                                setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                output Led for indication

                                                                                                                                sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                function prototype declaration

                                                                                                                                void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                void init_timer() timer 0 initialization function

                                                                                                                                variable declaration

                                                                                                                                bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                start of main programme

                                                                                                                                void main()

                                                                                                                                init_timer() call it timer initialization function

                                                                                                                                REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                start of while loop

                                                                                                                                while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                condition for switch1

                                                                                                                                if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                if(iltk) loop will repeat for desired time of charging

                                                                                                                                if(igt=1000)

                                                                                                                                buzzer=1 turn on buzzer if (ii==20)

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                REady_LED1=1 turn on ready indication of led1

                                                                                                                                else if(ii==40)

                                                                                                                                REady_LED1=0ii=0

                                                                                                                                elseREady_LED1=0

                                                                                                                                START_LED1=1

                                                                                                                                else

                                                                                                                                START_LED1=0

                                                                                                                                k1=1 buzzer=0

                                                                                                                                REady_LED1=0 flag1=0

                                                                                                                                flag5=0flag6=0

                                                                                                                                condition for switch2

                                                                                                                                if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                REady_LED2=1 turn on ready 2 led indication

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                disp2=0

                                                                                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                if(jltk)

                                                                                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                elseREady_LED2=0

                                                                                                                                START_LED2=1

                                                                                                                                else START_LED2=0

                                                                                                                                REady_LED2=0 k2=1 buzzer=0

                                                                                                                                flag2=0flag7=0flag8=0

                                                                                                                                j=0jj=0

                                                                                                                                condition for switch 3

                                                                                                                                if(flag3==1) check swich3 pressed

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                if(disp3==1 )

                                                                                                                                REady_LED3=1 disp3=0

                                                                                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                if(lltk)

                                                                                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                elseREady_LED3=0

                                                                                                                                START_LED3=1

                                                                                                                                else START_LED3=0

                                                                                                                                LED2=0 k3=1 buzzer=0

                                                                                                                                REady_LED3=0 flag3=0

                                                                                                                                flag9=0flag10=0

                                                                                                                                l=0ll=0

                                                                                                                                condition for switch 4

                                                                                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                REady_LED4=1 disp4=0

                                                                                                                                if(flag11==1) check coin is pressed

                                                                                                                                if(flag12==1) START is pressed

                                                                                                                                if(mltk)

                                                                                                                                if(mgt1000)

                                                                                                                                buzzer=1 if(mm==20)

                                                                                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                elseREady_LED4=0

                                                                                                                                START_LED4=1

                                                                                                                                else START_LED4=0

                                                                                                                                buzzer=0 k4=1

                                                                                                                                REady_LED4=0 flag4=0

                                                                                                                                flag11=0flag12=0

                                                                                                                                m=0mm=0

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                while(1)

                                                                                                                                end of main programme

                                                                                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                whenever specific time the interrupt will generate control will go in following function

                                                                                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                my_delay(10) CALL DELAY FUNCTION

                                                                                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                if(flag7==1) SET THE FLAG

                                                                                                                                flag7=1

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                flag9=1

                                                                                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                flag11=1

                                                                                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                my_delay (10)

                                                                                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                if(flag5==1)

                                                                                                                                flag5=1

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                flag9=1

                                                                                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                flag11=1

                                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                if(flag7==1)

                                                                                                                                flag7=1

                                                                                                                                else

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                flag5=1

                                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                flag11=1

                                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                if(flag7==1)

                                                                                                                                flag7=1

                                                                                                                                elseflag7=0

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                flag5=1

                                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                flag9=1

                                                                                                                                elseflag9=0flag3=0REady_LED3=0

                                                                                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                if(flag6==1)

                                                                                                                                i++ if (igt1000) ii++

                                                                                                                                if (flag8==1)

                                                                                                                                j++ if(jgt1000) jj++

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                if (flag10==1)

                                                                                                                                l++ if (lgt1000) ll++

                                                                                                                                if (flag12==1)

                                                                                                                                m++ if (mgt1000) mm++

                                                                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                CHAPTER 13

                                                                                                                                TROUBLE SHOOT

                                                                                                                                Troubleshoot

                                                                                                                                131 TROUBLE SHOOT

                                                                                                                                A newly assembled circuit does not work may be due to -

                                                                                                                                Faulty components

                                                                                                                                Improper soldering

                                                                                                                                Wrong connections

                                                                                                                                Also any stop in working after some period may be due to -

                                                                                                                                Component failure

                                                                                                                                Supply failure

                                                                                                                                Damaging of PCB

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                proper soldering

                                                                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                Resistance measurement is also done which is known as Dry test

                                                                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                                                                continuity and replace it

                                                                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                during soldering PCB We solved that problem

                                                                                                                                CHAPTER 14

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                ADVANTAGES OF

                                                                                                                                THE PROJECT

                                                                                                                                Advantages

                                                                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                                                                Simple and hand efficient Microcontroller based system

                                                                                                                                Fast charging capacity

                                                                                                                                Simple to operate

                                                                                                                                Ease of mobility

                                                                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                                                                Less expensive

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Reduced man power

                                                                                                                                Low power consumption

                                                                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                CHAPTER 15

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                DISADVANTAGES

                                                                                                                                OF THE PROJECT

                                                                                                                                Disadvantages

                                                                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                                                                It requires mains supply to work project

                                                                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                min

                                                                                                                                It does not have battery backup therefore it cannot be portable

                                                                                                                                CHAPTER 16

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                APPLICATIONS OF

                                                                                                                                THE PROJECT

                                                                                                                                Application

                                                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                charge for the mobile phone in any places

                                                                                                                                It is used for emergency charging purposes

                                                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                                                places

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                any location where there is a high footfall creating a large number of

                                                                                                                                potential users

                                                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                                                CHAPTER 17

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                FUTURE

                                                                                                                                DEVELOPMENT OF

                                                                                                                                THE PROJECT

                                                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                                                condition in public places

                                                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                It will provide battery backup for make it portable

                                                                                                                                It will also provide SMS system in future

                                                                                                                                We can also increase the charging time by editing software of the project

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                CHAPTER 18

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                COST ANALYSIS

                                                                                                                                OF THE PROJECT

                                                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                                                1811 Component list for power supply card

                                                                                                                                Footprint Quantity Designators Rate

                                                                                                                                Resistor

                                                                                                                                22K 1 R2 1

                                                                                                                                1K 1 R1 1

                                                                                                                                Capacitor

                                                                                                                                1000uf25V 1 C5 10

                                                                                                                                2200uf25V 1 C1 10

                                                                                                                                022uf 2 C6 C2 1

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                Table 1811 Component list for power supply card

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                01uf 2 C4 C3 1

                                                                                                                                IC

                                                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                                                Connector

                                                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                                                LED3mm red 2 L1 L2 15

                                                                                                                                Heat sink (TO-220) 2 16

                                                                                                                                Total 955

                                                                                                                                1812 Component list for battery charger card

                                                                                                                                Footprint Quantity Rate

                                                                                                                                Capacitor

                                                                                                                                2200uf25V 1 1000

                                                                                                                                022uf 4 100

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                01uf 4 100

                                                                                                                                IC

                                                                                                                                BRIDGE W10 1 500

                                                                                                                                L7805CV (TO-220) 4 3200

                                                                                                                                Connector

                                                                                                                                CON PHO 2PIN 1 800

                                                                                                                                Relimate 2 pin 1 400

                                                                                                                                relimate 3 pin 4 2000

                                                                                                                                Heat sink (TO-220) 4 1200

                                                                                                                                TOTAL 9300

                                                                                                                                1813 Component list for Relay card

                                                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                Table 1812Component list for battery charger card

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                Total 18900

                                                                                                                                1814Component list for controller card

                                                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                Table 1813Component list for relay card

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                total 27000

                                                                                                                                1815 Miscellaneous material

                                                                                                                                Material Quantity Rate

                                                                                                                                electronic item

                                                                                                                                Transformer

                                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                                0-9 1A

                                                                                                                                0-15 100mA

                                                                                                                                TXR2 0-9 1 16500

                                                                                                                                0-9 1A

                                                                                                                                Proximity switch 1 20000

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Red push bottom 4 4000

                                                                                                                                Green push button 1 1000

                                                                                                                                Red led 5mm 4 800

                                                                                                                                Green led 5mm 4 800

                                                                                                                                Led holder 8 1600

                                                                                                                                Copper clad 2 4000

                                                                                                                                3 core cable 1 meter 1500

                                                                                                                                3 pin plug 1 3000

                                                                                                                                2 pin relimate wire 19 9000

                                                                                                                                3 pin relimate wire 5 3750

                                                                                                                                4 pin relimate wire 2 2000

                                                                                                                                mechanical items

                                                                                                                                Enclosure 1 25000

                                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                                12mm cable gland 1 1000

                                                                                                                                Screw 3mm 33 2000

                                                                                                                                Screw 35mm 6 2400

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                10 mm spacers 100 1500

                                                                                                                                10mm insert to stud 50 10000

                                                                                                                                cable tie 2500

                                                                                                                                Total 162350

                                                                                                                                CHAPTER 19

                                                                                                                                APPENDIX

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                APPENDIX

                                                                                                                                191 APPENDIX

                                                                                                                                1911 78xx IC datasheet

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                1912 W10 datasheet

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                1913 4n33 IC datasheet

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                1914 MAX 232

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                CHAPTER 20

                                                                                                                                CONCLUSION

                                                                                                                                CONCLUSION

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                201 CONCLUSION

                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                installed in any business premises

                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                CHAPTER 21

                                                                                                                                IMAGES OF THE

                                                                                                                                PROJECT

                                                                                                                                Images of the project

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                Fig214 Power supply circuit

                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                CHAPTER 22

                                                                                                                                BIBILOGRAPHY

                                                                                                                                BIBLIOGRAPHY

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                BOOKS

                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                INTERNET LINKS

                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                • CHAPTER 1

                                                                                                                                  9

                                                                                                                                  flag2==1

                                                                                                                                  flag3==1

                                                                                                                                  8

                                                                                                                                  flag1==1

                                                                                                                                  flag4==1 flag5=1 disp5=1

                                                                                                                                  flag9=1 disp5=1

                                                                                                                                  flag7=1 disp5=1

                                                                                                                                  flag11=1 disp5=1

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 65

                                                                                                                                  Sw6_op (P05) ==0

                                                                                                                                  My delay (10)

                                                                                                                                  flag2==1 ampamp flag7==1

                                                                                                                                  flag3==1 ampamp flag9==1 9

                                                                                                                                  flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                                  flag8=1 disp6=1

                                                                                                                                  10

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                                  10

                                                                                                                                  flag4==1 ampamp flag11==1

                                                                                                                                  flag10=1 disp6=1

                                                                                                                                  flag12=1 disp6=1

                                                                                                                                  flag8==1

                                                                                                                                  flag10==1

                                                                                                                                  11

                                                                                                                                  flag6==1

                                                                                                                                  i++

                                                                                                                                  l++

                                                                                                                                  j++

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                                  flag12==1

                                                                                                                                  M++

                                                                                                                                  11

                                                                                                                                  Stop

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  122 Program

                                                                                                                                  includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                  define buzzerP2_0 buzzer indication

                                                                                                                                  setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                  sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                  sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                  output Led for indication

                                                                                                                                  sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                  sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                  function prototype declaration

                                                                                                                                  void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                  void init_timer() timer 0 initialization function

                                                                                                                                  variable declaration

                                                                                                                                  bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

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                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  start of main programme

                                                                                                                                  void main()

                                                                                                                                  init_timer() call it timer initialization function

                                                                                                                                  REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                  START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                  start of while loop

                                                                                                                                  while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                  condition for switch1

                                                                                                                                  if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                  REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                  if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                  if(iltk) loop will repeat for desired time of charging

                                                                                                                                  if(igt=1000)

                                                                                                                                  buzzer=1 turn on buzzer if (ii==20)

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                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  REady_LED1=1 turn on ready indication of led1

                                                                                                                                  else if(ii==40)

                                                                                                                                  REady_LED1=0ii=0

                                                                                                                                  elseREady_LED1=0

                                                                                                                                  START_LED1=1

                                                                                                                                  else

                                                                                                                                  START_LED1=0

                                                                                                                                  k1=1 buzzer=0

                                                                                                                                  REady_LED1=0 flag1=0

                                                                                                                                  flag5=0flag6=0

                                                                                                                                  condition for switch2

                                                                                                                                  if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                  REady_LED2=1 turn on ready 2 led indication

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  disp2=0

                                                                                                                                  if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                  if(jltk)

                                                                                                                                  if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                  REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                  elseREady_LED2=0

                                                                                                                                  START_LED2=1

                                                                                                                                  else START_LED2=0

                                                                                                                                  REady_LED2=0 k2=1 buzzer=0

                                                                                                                                  flag2=0flag7=0flag8=0

                                                                                                                                  j=0jj=0

                                                                                                                                  condition for switch 3

                                                                                                                                  if(flag3==1) check swich3 pressed

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  if(disp3==1 )

                                                                                                                                  REady_LED3=1 disp3=0

                                                                                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                  if(lltk)

                                                                                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                  elseREady_LED3=0

                                                                                                                                  START_LED3=1

                                                                                                                                  else START_LED3=0

                                                                                                                                  LED2=0 k3=1 buzzer=0

                                                                                                                                  REady_LED3=0 flag3=0

                                                                                                                                  flag9=0flag10=0

                                                                                                                                  l=0ll=0

                                                                                                                                  condition for switch 4

                                                                                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  REady_LED4=1 disp4=0

                                                                                                                                  if(flag11==1) check coin is pressed

                                                                                                                                  if(flag12==1) START is pressed

                                                                                                                                  if(mltk)

                                                                                                                                  if(mgt1000)

                                                                                                                                  buzzer=1 if(mm==20)

                                                                                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                  elseREady_LED4=0

                                                                                                                                  START_LED4=1

                                                                                                                                  else START_LED4=0

                                                                                                                                  buzzer=0 k4=1

                                                                                                                                  REady_LED4=0 flag4=0

                                                                                                                                  flag11=0flag12=0

                                                                                                                                  m=0mm=0

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  while(1)

                                                                                                                                  end of main programme

                                                                                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                  if(flag7==1) SET THE FLAG

                                                                                                                                  flag7=1

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                  flag9=1

                                                                                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                  flag11=1

                                                                                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                  my_delay (10)

                                                                                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                  if(flag5==1)

                                                                                                                                  flag5=1

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                  flag9=1

                                                                                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                  flag11=1

                                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                  if(flag7==1)

                                                                                                                                  flag7=1

                                                                                                                                  else

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                  flag5=1

                                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                  flag11=1

                                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                  if(flag7==1)

                                                                                                                                  flag7=1

                                                                                                                                  elseflag7=0

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                  flag5=1

                                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                  flag9=1

                                                                                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                  if(flag6==1)

                                                                                                                                  i++ if (igt1000) ii++

                                                                                                                                  if (flag8==1)

                                                                                                                                  j++ if(jgt1000) jj++

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  if (flag10==1)

                                                                                                                                  l++ if (lgt1000) ll++

                                                                                                                                  if (flag12==1)

                                                                                                                                  m++ if (mgt1000) mm++

                                                                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  CHAPTER 13

                                                                                                                                  TROUBLE SHOOT

                                                                                                                                  Troubleshoot

                                                                                                                                  131 TROUBLE SHOOT

                                                                                                                                  A newly assembled circuit does not work may be due to -

                                                                                                                                  Faulty components

                                                                                                                                  Improper soldering

                                                                                                                                  Wrong connections

                                                                                                                                  Also any stop in working after some period may be due to -

                                                                                                                                  Component failure

                                                                                                                                  Supply failure

                                                                                                                                  Damaging of PCB

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                  proper soldering

                                                                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                                                                  continuity and replace it

                                                                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                  during soldering PCB We solved that problem

                                                                                                                                  CHAPTER 14

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  ADVANTAGES OF

                                                                                                                                  THE PROJECT

                                                                                                                                  Advantages

                                                                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                                                                  Simple and hand efficient Microcontroller based system

                                                                                                                                  Fast charging capacity

                                                                                                                                  Simple to operate

                                                                                                                                  Ease of mobility

                                                                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                                                                  Less expensive

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Reduced man power

                                                                                                                                  Low power consumption

                                                                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                  CHAPTER 15

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  DISADVANTAGES

                                                                                                                                  OF THE PROJECT

                                                                                                                                  Disadvantages

                                                                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                                                                  It requires mains supply to work project

                                                                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                  min

                                                                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                                                                  CHAPTER 16

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  APPLICATIONS OF

                                                                                                                                  THE PROJECT

                                                                                                                                  Application

                                                                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                  charge for the mobile phone in any places

                                                                                                                                  It is used for emergency charging purposes

                                                                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                                                                  places

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                                                  potential users

                                                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                                                  CHAPTER 17

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  FUTURE

                                                                                                                                  DEVELOPMENT OF

                                                                                                                                  THE PROJECT

                                                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                                                  condition in public places

                                                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                  It will provide battery backup for make it portable

                                                                                                                                  It will also provide SMS system in future

                                                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  CHAPTER 18

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  COST ANALYSIS

                                                                                                                                  OF THE PROJECT

                                                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                                                  1811 Component list for power supply card

                                                                                                                                  Footprint Quantity Designators Rate

                                                                                                                                  Resistor

                                                                                                                                  22K 1 R2 1

                                                                                                                                  1K 1 R1 1

                                                                                                                                  Capacitor

                                                                                                                                  1000uf25V 1 C5 10

                                                                                                                                  2200uf25V 1 C1 10

                                                                                                                                  022uf 2 C6 C2 1

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                  Table 1811 Component list for power supply card

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  01uf 2 C4 C3 1

                                                                                                                                  IC

                                                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                                                  Connector

                                                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                                                  Heat sink (TO-220) 2 16

                                                                                                                                  Total 955

                                                                                                                                  1812 Component list for battery charger card

                                                                                                                                  Footprint Quantity Rate

                                                                                                                                  Capacitor

                                                                                                                                  2200uf25V 1 1000

                                                                                                                                  022uf 4 100

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  01uf 4 100

                                                                                                                                  IC

                                                                                                                                  BRIDGE W10 1 500

                                                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                                                  Connector

                                                                                                                                  CON PHO 2PIN 1 800

                                                                                                                                  Relimate 2 pin 1 400

                                                                                                                                  relimate 3 pin 4 2000

                                                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                                                  TOTAL 9300

                                                                                                                                  1813 Component list for Relay card

                                                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                  Table 1812Component list for battery charger card

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                  Total 18900

                                                                                                                                  1814Component list for controller card

                                                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                  Table 1813Component list for relay card

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                  total 27000

                                                                                                                                  1815 Miscellaneous material

                                                                                                                                  Material Quantity Rate

                                                                                                                                  electronic item

                                                                                                                                  Transformer

                                                                                                                                  TXR1 0-9-15 1 20000

                                                                                                                                  0-9 1A

                                                                                                                                  0-15 100mA

                                                                                                                                  TXR2 0-9 1 16500

                                                                                                                                  0-9 1A

                                                                                                                                  Proximity switch 1 20000

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                  Table 1814Component list for microcontroller card

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Red push bottom 4 4000

                                                                                                                                  Green push button 1 1000

                                                                                                                                  Red led 5mm 4 800

                                                                                                                                  Green led 5mm 4 800

                                                                                                                                  Led holder 8 1600

                                                                                                                                  Copper clad 2 4000

                                                                                                                                  3 core cable 1 meter 1500

                                                                                                                                  3 pin plug 1 3000

                                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                                  mechanical items

                                                                                                                                  Enclosure 1 25000

                                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                                  12mm cable gland 1 1000

                                                                                                                                  Screw 3mm 33 2000

                                                                                                                                  Screw 35mm 6 2400

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  10 mm spacers 100 1500

                                                                                                                                  10mm insert to stud 50 10000

                                                                                                                                  cable tie 2500

                                                                                                                                  Total 162350

                                                                                                                                  CHAPTER 19

                                                                                                                                  APPENDIX

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  APPENDIX

                                                                                                                                  191 APPENDIX

                                                                                                                                  1911 78xx IC datasheet

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  1912 W10 datasheet

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  1913 4n33 IC datasheet

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                  1914 MAX 232

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  CHAPTER 20

                                                                                                                                  CONCLUSION

                                                                                                                                  CONCLUSION

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  201 CONCLUSION

                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                  installed in any business premises

                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  CHAPTER 21

                                                                                                                                  IMAGES OF THE

                                                                                                                                  PROJECT

                                                                                                                                  Images of the project

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  CHAPTER 22

                                                                                                                                  BIBILOGRAPHY

                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                  BOOKS

                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                  INTERNET LINKS

                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                  • CHAPTER 1

                                                                                                                                    Sw6_op (P05) ==0

                                                                                                                                    My delay (10)

                                                                                                                                    flag2==1 ampamp flag7==1

                                                                                                                                    flag3==1 ampamp flag9==1 9

                                                                                                                                    flag1==1 ampamp flag5==1 flag6=1 disp6=1

                                                                                                                                    flag8=1 disp6=1

                                                                                                                                    10

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 66

                                                                                                                                    10

                                                                                                                                    flag4==1 ampamp flag11==1

                                                                                                                                    flag10=1 disp6=1

                                                                                                                                    flag12=1 disp6=1

                                                                                                                                    flag8==1

                                                                                                                                    flag10==1

                                                                                                                                    11

                                                                                                                                    flag6==1

                                                                                                                                    i++

                                                                                                                                    l++

                                                                                                                                    j++

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                                    flag12==1

                                                                                                                                    M++

                                                                                                                                    11

                                                                                                                                    Stop

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    122 Program

                                                                                                                                    includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                    define buzzerP2_0 buzzer indication

                                                                                                                                    setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                    sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                    sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                    output Led for indication

                                                                                                                                    sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                    sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                    function prototype declaration

                                                                                                                                    void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                    void init_timer() timer 0 initialization function

                                                                                                                                    variable declaration

                                                                                                                                    bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    start of main programme

                                                                                                                                    void main()

                                                                                                                                    init_timer() call it timer initialization function

                                                                                                                                    REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                    START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                    start of while loop

                                                                                                                                    while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                    condition for switch1

                                                                                                                                    if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                    REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                    if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                    if(iltk) loop will repeat for desired time of charging

                                                                                                                                    if(igt=1000)

                                                                                                                                    buzzer=1 turn on buzzer if (ii==20)

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                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    REady_LED1=1 turn on ready indication of led1

                                                                                                                                    else if(ii==40)

                                                                                                                                    REady_LED1=0ii=0

                                                                                                                                    elseREady_LED1=0

                                                                                                                                    START_LED1=1

                                                                                                                                    else

                                                                                                                                    START_LED1=0

                                                                                                                                    k1=1 buzzer=0

                                                                                                                                    REady_LED1=0 flag1=0

                                                                                                                                    flag5=0flag6=0

                                                                                                                                    condition for switch2

                                                                                                                                    if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                    REady_LED2=1 turn on ready 2 led indication

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    disp2=0

                                                                                                                                    if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                    if(jltk)

                                                                                                                                    if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                    REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                    elseREady_LED2=0

                                                                                                                                    START_LED2=1

                                                                                                                                    else START_LED2=0

                                                                                                                                    REady_LED2=0 k2=1 buzzer=0

                                                                                                                                    flag2=0flag7=0flag8=0

                                                                                                                                    j=0jj=0

                                                                                                                                    condition for switch 3

                                                                                                                                    if(flag3==1) check swich3 pressed

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    if(disp3==1 )

                                                                                                                                    REady_LED3=1 disp3=0

                                                                                                                                    if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                    if(lltk)

                                                                                                                                    if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                    REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                    elseREady_LED3=0

                                                                                                                                    START_LED3=1

                                                                                                                                    else START_LED3=0

                                                                                                                                    LED2=0 k3=1 buzzer=0

                                                                                                                                    REady_LED3=0 flag3=0

                                                                                                                                    flag9=0flag10=0

                                                                                                                                    l=0ll=0

                                                                                                                                    condition for switch 4

                                                                                                                                    if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    REady_LED4=1 disp4=0

                                                                                                                                    if(flag11==1) check coin is pressed

                                                                                                                                    if(flag12==1) START is pressed

                                                                                                                                    if(mltk)

                                                                                                                                    if(mgt1000)

                                                                                                                                    buzzer=1 if(mm==20)

                                                                                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                    elseREady_LED4=0

                                                                                                                                    START_LED4=1

                                                                                                                                    else START_LED4=0

                                                                                                                                    buzzer=0 k4=1

                                                                                                                                    REady_LED4=0 flag4=0

                                                                                                                                    flag11=0flag12=0

                                                                                                                                    m=0mm=0

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    while(1)

                                                                                                                                    end of main programme

                                                                                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                    if(flag7==1) SET THE FLAG

                                                                                                                                    flag7=1

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                    flag9=1

                                                                                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                    flag11=1

                                                                                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                    my_delay (10)

                                                                                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                    if(flag5==1)

                                                                                                                                    flag5=1

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                    flag9=1

                                                                                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                    flag11=1

                                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                    if(flag7==1)

                                                                                                                                    flag7=1

                                                                                                                                    else

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                    flag5=1

                                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                    flag11=1

                                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                    if(flag7==1)

                                                                                                                                    flag7=1

                                                                                                                                    elseflag7=0

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                    flag5=1

                                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                    flag9=1

                                                                                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                    if(flag6==1)

                                                                                                                                    i++ if (igt1000) ii++

                                                                                                                                    if (flag8==1)

                                                                                                                                    j++ if(jgt1000) jj++

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    if (flag10==1)

                                                                                                                                    l++ if (lgt1000) ll++

                                                                                                                                    if (flag12==1)

                                                                                                                                    m++ if (mgt1000) mm++

                                                                                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    CHAPTER 13

                                                                                                                                    TROUBLE SHOOT

                                                                                                                                    Troubleshoot

                                                                                                                                    131 TROUBLE SHOOT

                                                                                                                                    A newly assembled circuit does not work may be due to -

                                                                                                                                    Faulty components

                                                                                                                                    Improper soldering

                                                                                                                                    Wrong connections

                                                                                                                                    Also any stop in working after some period may be due to -

                                                                                                                                    Component failure

                                                                                                                                    Supply failure

                                                                                                                                    Damaging of PCB

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                    proper soldering

                                                                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                                                                    continuity and replace it

                                                                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                    during soldering PCB We solved that problem

                                                                                                                                    CHAPTER 14

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    ADVANTAGES OF

                                                                                                                                    THE PROJECT

                                                                                                                                    Advantages

                                                                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                                                                    Simple and hand efficient Microcontroller based system

                                                                                                                                    Fast charging capacity

                                                                                                                                    Simple to operate

                                                                                                                                    Ease of mobility

                                                                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                                                                    Less expensive

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Reduced man power

                                                                                                                                    Low power consumption

                                                                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                    CHAPTER 15

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    DISADVANTAGES

                                                                                                                                    OF THE PROJECT

                                                                                                                                    Disadvantages

                                                                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                                                                    It requires mains supply to work project

                                                                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                    min

                                                                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                                                                    CHAPTER 16

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    APPLICATIONS OF

                                                                                                                                    THE PROJECT

                                                                                                                                    Application

                                                                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                    charge for the mobile phone in any places

                                                                                                                                    It is used for emergency charging purposes

                                                                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                                                                    places

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                    any location where there is a high footfall creating a large number of

                                                                                                                                    potential users

                                                                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                                                                    CHAPTER 17

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    FUTURE

                                                                                                                                    DEVELOPMENT OF

                                                                                                                                    THE PROJECT

                                                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                                                    condition in public places

                                                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                    It will provide battery backup for make it portable

                                                                                                                                    It will also provide SMS system in future

                                                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    CHAPTER 18

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    COST ANALYSIS

                                                                                                                                    OF THE PROJECT

                                                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                                                    1811 Component list for power supply card

                                                                                                                                    Footprint Quantity Designators Rate

                                                                                                                                    Resistor

                                                                                                                                    22K 1 R2 1

                                                                                                                                    1K 1 R1 1

                                                                                                                                    Capacitor

                                                                                                                                    1000uf25V 1 C5 10

                                                                                                                                    2200uf25V 1 C1 10

                                                                                                                                    022uf 2 C6 C2 1

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                    Table 1811 Component list for power supply card

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    01uf 2 C4 C3 1

                                                                                                                                    IC

                                                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                                                    Connector

                                                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                                                    Heat sink (TO-220) 2 16

                                                                                                                                    Total 955

                                                                                                                                    1812 Component list for battery charger card

                                                                                                                                    Footprint Quantity Rate

                                                                                                                                    Capacitor

                                                                                                                                    2200uf25V 1 1000

                                                                                                                                    022uf 4 100

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    01uf 4 100

                                                                                                                                    IC

                                                                                                                                    BRIDGE W10 1 500

                                                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                                                    Connector

                                                                                                                                    CON PHO 2PIN 1 800

                                                                                                                                    Relimate 2 pin 1 400

                                                                                                                                    relimate 3 pin 4 2000

                                                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                                                    TOTAL 9300

                                                                                                                                    1813 Component list for Relay card

                                                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                    Table 1812Component list for battery charger card

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                    Total 18900

                                                                                                                                    1814Component list for controller card

                                                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                    Table 1813Component list for relay card

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                    total 27000

                                                                                                                                    1815 Miscellaneous material

                                                                                                                                    Material Quantity Rate

                                                                                                                                    electronic item

                                                                                                                                    Transformer

                                                                                                                                    TXR1 0-9-15 1 20000

                                                                                                                                    0-9 1A

                                                                                                                                    0-15 100mA

                                                                                                                                    TXR2 0-9 1 16500

                                                                                                                                    0-9 1A

                                                                                                                                    Proximity switch 1 20000

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                    Table 1814Component list for microcontroller card

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Red push bottom 4 4000

                                                                                                                                    Green push button 1 1000

                                                                                                                                    Red led 5mm 4 800

                                                                                                                                    Green led 5mm 4 800

                                                                                                                                    Led holder 8 1600

                                                                                                                                    Copper clad 2 4000

                                                                                                                                    3 core cable 1 meter 1500

                                                                                                                                    3 pin plug 1 3000

                                                                                                                                    2 pin relimate wire 19 9000

                                                                                                                                    3 pin relimate wire 5 3750

                                                                                                                                    4 pin relimate wire 2 2000

                                                                                                                                    mechanical items

                                                                                                                                    Enclosure 1 25000

                                                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                                                    12mm cable gland 1 1000

                                                                                                                                    Screw 3mm 33 2000

                                                                                                                                    Screw 35mm 6 2400

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    10 mm spacers 100 1500

                                                                                                                                    10mm insert to stud 50 10000

                                                                                                                                    cable tie 2500

                                                                                                                                    Total 162350

                                                                                                                                    CHAPTER 19

                                                                                                                                    APPENDIX

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    APPENDIX

                                                                                                                                    191 APPENDIX

                                                                                                                                    1911 78xx IC datasheet

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    1912 W10 datasheet

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    1913 4n33 IC datasheet

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                    1914 MAX 232

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    CHAPTER 20

                                                                                                                                    CONCLUSION

                                                                                                                                    CONCLUSION

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    201 CONCLUSION

                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                    installed in any business premises

                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    CHAPTER 21

                                                                                                                                    IMAGES OF THE

                                                                                                                                    PROJECT

                                                                                                                                    Images of the project

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    CHAPTER 22

                                                                                                                                    BIBILOGRAPHY

                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                    BOOKS

                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                    INTERNET LINKS

                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                    • CHAPTER 1

                                                                                                                                      10

                                                                                                                                      flag4==1 ampamp flag11==1

                                                                                                                                      flag10=1 disp6=1

                                                                                                                                      flag12=1 disp6=1

                                                                                                                                      flag8==1

                                                                                                                                      flag10==1

                                                                                                                                      11

                                                                                                                                      flag6==1

                                                                                                                                      i++

                                                                                                                                      l++

                                                                                                                                      j++

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 67

                                                                                                                                      flag12==1

                                                                                                                                      M++

                                                                                                                                      11

                                                                                                                                      Stop

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      122 Program

                                                                                                                                      includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                      define buzzerP2_0 buzzer indication

                                                                                                                                      setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                      sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                      sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                      output Led for indication

                                                                                                                                      sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                      sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                      function prototype declaration

                                                                                                                                      void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                      void init_timer() timer 0 initialization function

                                                                                                                                      variable declaration

                                                                                                                                      bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      start of main programme

                                                                                                                                      void main()

                                                                                                                                      init_timer() call it timer initialization function

                                                                                                                                      REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                      START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                      start of while loop

                                                                                                                                      while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                      condition for switch1

                                                                                                                                      if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                      REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                      if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                      if(iltk) loop will repeat for desired time of charging

                                                                                                                                      if(igt=1000)

                                                                                                                                      buzzer=1 turn on buzzer if (ii==20)

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      REady_LED1=1 turn on ready indication of led1

                                                                                                                                      else if(ii==40)

                                                                                                                                      REady_LED1=0ii=0

                                                                                                                                      elseREady_LED1=0

                                                                                                                                      START_LED1=1

                                                                                                                                      else

                                                                                                                                      START_LED1=0

                                                                                                                                      k1=1 buzzer=0

                                                                                                                                      REady_LED1=0 flag1=0

                                                                                                                                      flag5=0flag6=0

                                                                                                                                      condition for switch2

                                                                                                                                      if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                      REady_LED2=1 turn on ready 2 led indication

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      disp2=0

                                                                                                                                      if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                      if(jltk)

                                                                                                                                      if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                      REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                      elseREady_LED2=0

                                                                                                                                      START_LED2=1

                                                                                                                                      else START_LED2=0

                                                                                                                                      REady_LED2=0 k2=1 buzzer=0

                                                                                                                                      flag2=0flag7=0flag8=0

                                                                                                                                      j=0jj=0

                                                                                                                                      condition for switch 3

                                                                                                                                      if(flag3==1) check swich3 pressed

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      if(disp3==1 )

                                                                                                                                      REady_LED3=1 disp3=0

                                                                                                                                      if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                      if(lltk)

                                                                                                                                      if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                      REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                      elseREady_LED3=0

                                                                                                                                      START_LED3=1

                                                                                                                                      else START_LED3=0

                                                                                                                                      LED2=0 k3=1 buzzer=0

                                                                                                                                      REady_LED3=0 flag3=0

                                                                                                                                      flag9=0flag10=0

                                                                                                                                      l=0ll=0

                                                                                                                                      condition for switch 4

                                                                                                                                      if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      REady_LED4=1 disp4=0

                                                                                                                                      if(flag11==1) check coin is pressed

                                                                                                                                      if(flag12==1) START is pressed

                                                                                                                                      if(mltk)

                                                                                                                                      if(mgt1000)

                                                                                                                                      buzzer=1 if(mm==20)

                                                                                                                                      REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                      elseREady_LED4=0

                                                                                                                                      START_LED4=1

                                                                                                                                      else START_LED4=0

                                                                                                                                      buzzer=0 k4=1

                                                                                                                                      REady_LED4=0 flag4=0

                                                                                                                                      flag11=0flag12=0

                                                                                                                                      m=0mm=0

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      while(1)

                                                                                                                                      end of main programme

                                                                                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                      if(flag7==1) SET THE FLAG

                                                                                                                                      flag7=1

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                      flag9=1

                                                                                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                      flag11=1

                                                                                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                      my_delay (10)

                                                                                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                      if(flag5==1)

                                                                                                                                      flag5=1

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                      flag9=1

                                                                                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                      flag11=1

                                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                      if(flag7==1)

                                                                                                                                      flag7=1

                                                                                                                                      else

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                      flag5=1

                                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                      flag11=1

                                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                      if(flag7==1)

                                                                                                                                      flag7=1

                                                                                                                                      elseflag7=0

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                      flag5=1

                                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                      flag9=1

                                                                                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                      if(flag6==1)

                                                                                                                                      i++ if (igt1000) ii++

                                                                                                                                      if (flag8==1)

                                                                                                                                      j++ if(jgt1000) jj++

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      if (flag10==1)

                                                                                                                                      l++ if (lgt1000) ll++

                                                                                                                                      if (flag12==1)

                                                                                                                                      m++ if (mgt1000) mm++

                                                                                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      CHAPTER 13

                                                                                                                                      TROUBLE SHOOT

                                                                                                                                      Troubleshoot

                                                                                                                                      131 TROUBLE SHOOT

                                                                                                                                      A newly assembled circuit does not work may be due to -

                                                                                                                                      Faulty components

                                                                                                                                      Improper soldering

                                                                                                                                      Wrong connections

                                                                                                                                      Also any stop in working after some period may be due to -

                                                                                                                                      Component failure

                                                                                                                                      Supply failure

                                                                                                                                      Damaging of PCB

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                      proper soldering

                                                                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                                                                      continuity and replace it

                                                                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                      during soldering PCB We solved that problem

                                                                                                                                      CHAPTER 14

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      ADVANTAGES OF

                                                                                                                                      THE PROJECT

                                                                                                                                      Advantages

                                                                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                                                                      Simple and hand efficient Microcontroller based system

                                                                                                                                      Fast charging capacity

                                                                                                                                      Simple to operate

                                                                                                                                      Ease of mobility

                                                                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                                                                      Less expensive

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Reduced man power

                                                                                                                                      Low power consumption

                                                                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                      CHAPTER 15

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      DISADVANTAGES

                                                                                                                                      OF THE PROJECT

                                                                                                                                      Disadvantages

                                                                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                                                                      It requires mains supply to work project

                                                                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                      min

                                                                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                                                                      CHAPTER 16

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      APPLICATIONS OF

                                                                                                                                      THE PROJECT

                                                                                                                                      Application

                                                                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                      charge for the mobile phone in any places

                                                                                                                                      It is used for emergency charging purposes

                                                                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                                                                      places

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                      any location where there is a high footfall creating a large number of

                                                                                                                                      potential users

                                                                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                                                                      CHAPTER 17

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      FUTURE

                                                                                                                                      DEVELOPMENT OF

                                                                                                                                      THE PROJECT

                                                                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                                                                      condition in public places

                                                                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                      It will provide battery backup for make it portable

                                                                                                                                      It will also provide SMS system in future

                                                                                                                                      We can also increase the charging time by editing software of the project

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      CHAPTER 18

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      COST ANALYSIS

                                                                                                                                      OF THE PROJECT

                                                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                                                      1811 Component list for power supply card

                                                                                                                                      Footprint Quantity Designators Rate

                                                                                                                                      Resistor

                                                                                                                                      22K 1 R2 1

                                                                                                                                      1K 1 R1 1

                                                                                                                                      Capacitor

                                                                                                                                      1000uf25V 1 C5 10

                                                                                                                                      2200uf25V 1 C1 10

                                                                                                                                      022uf 2 C6 C2 1

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                      Table 1811 Component list for power supply card

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      01uf 2 C4 C3 1

                                                                                                                                      IC

                                                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                                                      Connector

                                                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                                                      Heat sink (TO-220) 2 16

                                                                                                                                      Total 955

                                                                                                                                      1812 Component list for battery charger card

                                                                                                                                      Footprint Quantity Rate

                                                                                                                                      Capacitor

                                                                                                                                      2200uf25V 1 1000

                                                                                                                                      022uf 4 100

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      01uf 4 100

                                                                                                                                      IC

                                                                                                                                      BRIDGE W10 1 500

                                                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                                                      Connector

                                                                                                                                      CON PHO 2PIN 1 800

                                                                                                                                      Relimate 2 pin 1 400

                                                                                                                                      relimate 3 pin 4 2000

                                                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                                                      TOTAL 9300

                                                                                                                                      1813 Component list for Relay card

                                                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                      Table 1812Component list for battery charger card

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                      Total 18900

                                                                                                                                      1814Component list for controller card

                                                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                      Table 1813Component list for relay card

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                      total 27000

                                                                                                                                      1815 Miscellaneous material

                                                                                                                                      Material Quantity Rate

                                                                                                                                      electronic item

                                                                                                                                      Transformer

                                                                                                                                      TXR1 0-9-15 1 20000

                                                                                                                                      0-9 1A

                                                                                                                                      0-15 100mA

                                                                                                                                      TXR2 0-9 1 16500

                                                                                                                                      0-9 1A

                                                                                                                                      Proximity switch 1 20000

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                      Table 1814Component list for microcontroller card

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Red push bottom 4 4000

                                                                                                                                      Green push button 1 1000

                                                                                                                                      Red led 5mm 4 800

                                                                                                                                      Green led 5mm 4 800

                                                                                                                                      Led holder 8 1600

                                                                                                                                      Copper clad 2 4000

                                                                                                                                      3 core cable 1 meter 1500

                                                                                                                                      3 pin plug 1 3000

                                                                                                                                      2 pin relimate wire 19 9000

                                                                                                                                      3 pin relimate wire 5 3750

                                                                                                                                      4 pin relimate wire 2 2000

                                                                                                                                      mechanical items

                                                                                                                                      Enclosure 1 25000

                                                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                                                      12mm cable gland 1 1000

                                                                                                                                      Screw 3mm 33 2000

                                                                                                                                      Screw 35mm 6 2400

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      10 mm spacers 100 1500

                                                                                                                                      10mm insert to stud 50 10000

                                                                                                                                      cable tie 2500

                                                                                                                                      Total 162350

                                                                                                                                      CHAPTER 19

                                                                                                                                      APPENDIX

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      APPENDIX

                                                                                                                                      191 APPENDIX

                                                                                                                                      1911 78xx IC datasheet

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      1912 W10 datasheet

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      1913 4n33 IC datasheet

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                      1914 MAX 232

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      CHAPTER 20

                                                                                                                                      CONCLUSION

                                                                                                                                      CONCLUSION

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      201 CONCLUSION

                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                      installed in any business premises

                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      CHAPTER 21

                                                                                                                                      IMAGES OF THE

                                                                                                                                      PROJECT

                                                                                                                                      Images of the project

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      CHAPTER 22

                                                                                                                                      BIBILOGRAPHY

                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                      BOOKS

                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                      INTERNET LINKS

                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                      • CHAPTER 1

                                                                                                                                        flag12==1

                                                                                                                                        M++

                                                                                                                                        11

                                                                                                                                        Stop

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 68

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        122 Program

                                                                                                                                        includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                        define buzzerP2_0 buzzer indication

                                                                                                                                        setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                        sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                        sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                        output Led for indication

                                                                                                                                        sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                        sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                        function prototype declaration

                                                                                                                                        void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                        void init_timer() timer 0 initialization function

                                                                                                                                        variable declaration

                                                                                                                                        bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 69

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        start of main programme

                                                                                                                                        void main()

                                                                                                                                        init_timer() call it timer initialization function

                                                                                                                                        REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                        START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                        start of while loop

                                                                                                                                        while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                        condition for switch1

                                                                                                                                        if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                        REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                        if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                        if(iltk) loop will repeat for desired time of charging

                                                                                                                                        if(igt=1000)

                                                                                                                                        buzzer=1 turn on buzzer if (ii==20)

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        REady_LED1=1 turn on ready indication of led1

                                                                                                                                        else if(ii==40)

                                                                                                                                        REady_LED1=0ii=0

                                                                                                                                        elseREady_LED1=0

                                                                                                                                        START_LED1=1

                                                                                                                                        else

                                                                                                                                        START_LED1=0

                                                                                                                                        k1=1 buzzer=0

                                                                                                                                        REady_LED1=0 flag1=0

                                                                                                                                        flag5=0flag6=0

                                                                                                                                        condition for switch2

                                                                                                                                        if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                        REady_LED2=1 turn on ready 2 led indication

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        disp2=0

                                                                                                                                        if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                        if(jltk)

                                                                                                                                        if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                        REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                        elseREady_LED2=0

                                                                                                                                        START_LED2=1

                                                                                                                                        else START_LED2=0

                                                                                                                                        REady_LED2=0 k2=1 buzzer=0

                                                                                                                                        flag2=0flag7=0flag8=0

                                                                                                                                        j=0jj=0

                                                                                                                                        condition for switch 3

                                                                                                                                        if(flag3==1) check swich3 pressed

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        if(disp3==1 )

                                                                                                                                        REady_LED3=1 disp3=0

                                                                                                                                        if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                        if(lltk)

                                                                                                                                        if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                        REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                        elseREady_LED3=0

                                                                                                                                        START_LED3=1

                                                                                                                                        else START_LED3=0

                                                                                                                                        LED2=0 k3=1 buzzer=0

                                                                                                                                        REady_LED3=0 flag3=0

                                                                                                                                        flag9=0flag10=0

                                                                                                                                        l=0ll=0

                                                                                                                                        condition for switch 4

                                                                                                                                        if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        REady_LED4=1 disp4=0

                                                                                                                                        if(flag11==1) check coin is pressed

                                                                                                                                        if(flag12==1) START is pressed

                                                                                                                                        if(mltk)

                                                                                                                                        if(mgt1000)

                                                                                                                                        buzzer=1 if(mm==20)

                                                                                                                                        REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                        elseREady_LED4=0

                                                                                                                                        START_LED4=1

                                                                                                                                        else START_LED4=0

                                                                                                                                        buzzer=0 k4=1

                                                                                                                                        REady_LED4=0 flag4=0

                                                                                                                                        flag11=0flag12=0

                                                                                                                                        m=0mm=0

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        while(1)

                                                                                                                                        end of main programme

                                                                                                                                        timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                        TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                        whenever specific time the interrupt will generate control will go in following function

                                                                                                                                        void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                        my_delay(10) CALL DELAY FUNCTION

                                                                                                                                        flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                        if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                        if(flag7==1) SET THE FLAG

                                                                                                                                        flag7=1

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                        flag9=1

                                                                                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                        flag11=1

                                                                                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                        my_delay (10)

                                                                                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                        if(flag5==1)

                                                                                                                                        flag5=1

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                        flag9=1

                                                                                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                        flag11=1

                                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                        if(flag7==1)

                                                                                                                                        flag7=1

                                                                                                                                        else

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                        flag5=1

                                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                        flag11=1

                                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                        if(flag7==1)

                                                                                                                                        flag7=1

                                                                                                                                        elseflag7=0

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                        flag5=1

                                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                        flag9=1

                                                                                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                        if(flag6==1)

                                                                                                                                        i++ if (igt1000) ii++

                                                                                                                                        if (flag8==1)

                                                                                                                                        j++ if(jgt1000) jj++

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        if (flag10==1)

                                                                                                                                        l++ if (lgt1000) ll++

                                                                                                                                        if (flag12==1)

                                                                                                                                        m++ if (mgt1000) mm++

                                                                                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        CHAPTER 13

                                                                                                                                        TROUBLE SHOOT

                                                                                                                                        Troubleshoot

                                                                                                                                        131 TROUBLE SHOOT

                                                                                                                                        A newly assembled circuit does not work may be due to -

                                                                                                                                        Faulty components

                                                                                                                                        Improper soldering

                                                                                                                                        Wrong connections

                                                                                                                                        Also any stop in working after some period may be due to -

                                                                                                                                        Component failure

                                                                                                                                        Supply failure

                                                                                                                                        Damaging of PCB

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                        proper soldering

                                                                                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                        Resistance measurement is also done which is known as Dry test

                                                                                                                                        During this project work some green LEDs was not glow then we checked it

                                                                                                                                        continuity and replace it

                                                                                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                        during soldering PCB We solved that problem

                                                                                                                                        CHAPTER 14

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        ADVANTAGES OF

                                                                                                                                        THE PROJECT

                                                                                                                                        Advantages

                                                                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                                                                        Simple and hand efficient Microcontroller based system

                                                                                                                                        Fast charging capacity

                                                                                                                                        Simple to operate

                                                                                                                                        Ease of mobility

                                                                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                                                                        Less expensive

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Reduced man power

                                                                                                                                        Low power consumption

                                                                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                        CHAPTER 15

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        DISADVANTAGES

                                                                                                                                        OF THE PROJECT

                                                                                                                                        Disadvantages

                                                                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                                                                        It requires mains supply to work project

                                                                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                        min

                                                                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                                                                        CHAPTER 16

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        APPLICATIONS OF

                                                                                                                                        THE PROJECT

                                                                                                                                        Application

                                                                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                        charge for the mobile phone in any places

                                                                                                                                        It is used for emergency charging purposes

                                                                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                                                                        places

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                        any location where there is a high footfall creating a large number of

                                                                                                                                        potential users

                                                                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                                                                        CHAPTER 17

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        FUTURE

                                                                                                                                        DEVELOPMENT OF

                                                                                                                                        THE PROJECT

                                                                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                                                                        condition in public places

                                                                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                        It will provide battery backup for make it portable

                                                                                                                                        It will also provide SMS system in future

                                                                                                                                        We can also increase the charging time by editing software of the project

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        CHAPTER 18

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        COST ANALYSIS

                                                                                                                                        OF THE PROJECT

                                                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                                                        1811 Component list for power supply card

                                                                                                                                        Footprint Quantity Designators Rate

                                                                                                                                        Resistor

                                                                                                                                        22K 1 R2 1

                                                                                                                                        1K 1 R1 1

                                                                                                                                        Capacitor

                                                                                                                                        1000uf25V 1 C5 10

                                                                                                                                        2200uf25V 1 C1 10

                                                                                                                                        022uf 2 C6 C2 1

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                        Table 1811 Component list for power supply card

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        01uf 2 C4 C3 1

                                                                                                                                        IC

                                                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                                                        Connector

                                                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                                                        Heat sink (TO-220) 2 16

                                                                                                                                        Total 955

                                                                                                                                        1812 Component list for battery charger card

                                                                                                                                        Footprint Quantity Rate

                                                                                                                                        Capacitor

                                                                                                                                        2200uf25V 1 1000

                                                                                                                                        022uf 4 100

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        01uf 4 100

                                                                                                                                        IC

                                                                                                                                        BRIDGE W10 1 500

                                                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                                                        Connector

                                                                                                                                        CON PHO 2PIN 1 800

                                                                                                                                        Relimate 2 pin 1 400

                                                                                                                                        relimate 3 pin 4 2000

                                                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                                                        TOTAL 9300

                                                                                                                                        1813 Component list for Relay card

                                                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                        Table 1812Component list for battery charger card

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                        Total 18900

                                                                                                                                        1814Component list for controller card

                                                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                        Table 1813Component list for relay card

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                        total 27000

                                                                                                                                        1815 Miscellaneous material

                                                                                                                                        Material Quantity Rate

                                                                                                                                        electronic item

                                                                                                                                        Transformer

                                                                                                                                        TXR1 0-9-15 1 20000

                                                                                                                                        0-9 1A

                                                                                                                                        0-15 100mA

                                                                                                                                        TXR2 0-9 1 16500

                                                                                                                                        0-9 1A

                                                                                                                                        Proximity switch 1 20000

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                        Table 1814Component list for microcontroller card

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Red push bottom 4 4000

                                                                                                                                        Green push button 1 1000

                                                                                                                                        Red led 5mm 4 800

                                                                                                                                        Green led 5mm 4 800

                                                                                                                                        Led holder 8 1600

                                                                                                                                        Copper clad 2 4000

                                                                                                                                        3 core cable 1 meter 1500

                                                                                                                                        3 pin plug 1 3000

                                                                                                                                        2 pin relimate wire 19 9000

                                                                                                                                        3 pin relimate wire 5 3750

                                                                                                                                        4 pin relimate wire 2 2000

                                                                                                                                        mechanical items

                                                                                                                                        Enclosure 1 25000

                                                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                                                        12mm cable gland 1 1000

                                                                                                                                        Screw 3mm 33 2000

                                                                                                                                        Screw 35mm 6 2400

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        10 mm spacers 100 1500

                                                                                                                                        10mm insert to stud 50 10000

                                                                                                                                        cable tie 2500

                                                                                                                                        Total 162350

                                                                                                                                        CHAPTER 19

                                                                                                                                        APPENDIX

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        APPENDIX

                                                                                                                                        191 APPENDIX

                                                                                                                                        1911 78xx IC datasheet

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        1912 W10 datasheet

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        1913 4n33 IC datasheet

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                        1914 MAX 232

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        CHAPTER 20

                                                                                                                                        CONCLUSION

                                                                                                                                        CONCLUSION

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        201 CONCLUSION

                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                        installed in any business premises

                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        CHAPTER 21

                                                                                                                                        IMAGES OF THE

                                                                                                                                        PROJECT

                                                                                                                                        Images of the project

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        CHAPTER 22

                                                                                                                                        BIBILOGRAPHY

                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                        BOOKS

                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                        INTERNET LINKS

                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                        • CHAPTER 1

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          122 Program

                                                                                                                                          includeltstdiohgtincludeltstringhgtincludeIDA51HincludeREG52H

                                                                                                                                          define buzzerP2_0 buzzer indication

                                                                                                                                          setting of ip switch for following operation sbit sw1_op=P0^0 input SWITCH1 for sytem1sbit sw2_op=P0^1 input SWITCH2 for sytem2sbit sw3_op=P0^2 input switch3 for sytem3sbit sw4_op=P0^3 input switch4 for sytem4

                                                                                                                                          sbit sw5_op=P0^4 input switch5 for coin

                                                                                                                                          sbit sw6_op=P0^5 input switch for startsbit sw7_op=P3^7 input switch for exit

                                                                                                                                          output Led for indication

                                                                                                                                          sbit REady_LED1=P1^0 LED1 indication (ready system1)sbit REady_LED2=P1^1 LED2 indication(ready system2)sbit REady_LED3=P1^2 LED3 indication(ready system3)sbit REady_LED4=P1^3 LED4 indication(ready system4)

                                                                                                                                          sbit START_LED1=P1^4 LED1 indication(start system1 )sbit START_LED2=P1^5 LED2 indication(start system2 )sbit START_LED3=P1^6 LED3 indication(start system3 )sbit START_LED4=P1^7 LED4 indication(start system4 )

                                                                                                                                          function prototype declaration

                                                                                                                                          void my_delay(unsigned int value) DELAY FUCTION

                                                                                                                                          void init_timer() timer 0 initialization function

                                                                                                                                          variable declaration

                                                                                                                                          bit flag1flag2flag3flag4flag5flag6flag7flag8flag9flag10flag11flag12bit disp1=0disp2=0disp3=0disp4=0disp5=0disp6=0k1=1k2=2k3=1k4=1unsigned long int i=0j=0l=0m=0ii=0ll=0jj=0mm=0 k=390(1 minute) k=50

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                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          start of main programme

                                                                                                                                          void main()

                                                                                                                                          init_timer() call it timer initialization function

                                                                                                                                          REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                          START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                          start of while loop

                                                                                                                                          while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                          condition for switch1

                                                                                                                                          if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                          REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                          if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                          if(iltk) loop will repeat for desired time of charging

                                                                                                                                          if(igt=1000)

                                                                                                                                          buzzer=1 turn on buzzer if (ii==20)

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          REady_LED1=1 turn on ready indication of led1

                                                                                                                                          else if(ii==40)

                                                                                                                                          REady_LED1=0ii=0

                                                                                                                                          elseREady_LED1=0

                                                                                                                                          START_LED1=1

                                                                                                                                          else

                                                                                                                                          START_LED1=0

                                                                                                                                          k1=1 buzzer=0

                                                                                                                                          REady_LED1=0 flag1=0

                                                                                                                                          flag5=0flag6=0

                                                                                                                                          condition for switch2

                                                                                                                                          if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                          REady_LED2=1 turn on ready 2 led indication

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          disp2=0

                                                                                                                                          if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                          if(jltk)

                                                                                                                                          if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                          REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                          elseREady_LED2=0

                                                                                                                                          START_LED2=1

                                                                                                                                          else START_LED2=0

                                                                                                                                          REady_LED2=0 k2=1 buzzer=0

                                                                                                                                          flag2=0flag7=0flag8=0

                                                                                                                                          j=0jj=0

                                                                                                                                          condition for switch 3

                                                                                                                                          if(flag3==1) check swich3 pressed

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          if(disp3==1 )

                                                                                                                                          REady_LED3=1 disp3=0

                                                                                                                                          if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                          if(lltk)

                                                                                                                                          if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                          REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                          elseREady_LED3=0

                                                                                                                                          START_LED3=1

                                                                                                                                          else START_LED3=0

                                                                                                                                          LED2=0 k3=1 buzzer=0

                                                                                                                                          REady_LED3=0 flag3=0

                                                                                                                                          flag9=0flag10=0

                                                                                                                                          l=0ll=0

                                                                                                                                          condition for switch 4

                                                                                                                                          if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          REady_LED4=1 disp4=0

                                                                                                                                          if(flag11==1) check coin is pressed

                                                                                                                                          if(flag12==1) START is pressed

                                                                                                                                          if(mltk)

                                                                                                                                          if(mgt1000)

                                                                                                                                          buzzer=1 if(mm==20)

                                                                                                                                          REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                          elseREady_LED4=0

                                                                                                                                          START_LED4=1

                                                                                                                                          else START_LED4=0

                                                                                                                                          buzzer=0 k4=1

                                                                                                                                          REady_LED4=0 flag4=0

                                                                                                                                          flag11=0flag12=0

                                                                                                                                          m=0mm=0

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          while(1)

                                                                                                                                          end of main programme

                                                                                                                                          timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                          TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                          whenever specific time the interrupt will generate control will go in following function

                                                                                                                                          void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                          my_delay(10) CALL DELAY FUNCTION

                                                                                                                                          flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                          if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                          if(flag7==1) SET THE FLAG

                                                                                                                                          flag7=1

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                          flag9=1

                                                                                                                                          elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                          flag11=1

                                                                                                                                          elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                          IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                          my_delay (10)

                                                                                                                                          flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                          if(flag5==1)

                                                                                                                                          flag5=1

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                          flag9=1

                                                                                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                          flag11=1

                                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                          if(flag7==1)

                                                                                                                                          flag7=1

                                                                                                                                          else

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                          flag5=1

                                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                          flag11=1

                                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                          if(flag7==1)

                                                                                                                                          flag7=1

                                                                                                                                          elseflag7=0

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                          flag5=1

                                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                          flag9=1

                                                                                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                          if(flag6==1)

                                                                                                                                          i++ if (igt1000) ii++

                                                                                                                                          if (flag8==1)

                                                                                                                                          j++ if(jgt1000) jj++

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          if (flag10==1)

                                                                                                                                          l++ if (lgt1000) ll++

                                                                                                                                          if (flag12==1)

                                                                                                                                          m++ if (mgt1000) mm++

                                                                                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          CHAPTER 13

                                                                                                                                          TROUBLE SHOOT

                                                                                                                                          Troubleshoot

                                                                                                                                          131 TROUBLE SHOOT

                                                                                                                                          A newly assembled circuit does not work may be due to -

                                                                                                                                          Faulty components

                                                                                                                                          Improper soldering

                                                                                                                                          Wrong connections

                                                                                                                                          Also any stop in working after some period may be due to -

                                                                                                                                          Component failure

                                                                                                                                          Supply failure

                                                                                                                                          Damaging of PCB

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                          proper soldering

                                                                                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                          Resistance measurement is also done which is known as Dry test

                                                                                                                                          During this project work some green LEDs was not glow then we checked it

                                                                                                                                          continuity and replace it

                                                                                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                          during soldering PCB We solved that problem

                                                                                                                                          CHAPTER 14

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          ADVANTAGES OF

                                                                                                                                          THE PROJECT

                                                                                                                                          Advantages

                                                                                                                                          141 ADVANTAGES OF THE PROJECT

                                                                                                                                          Simple and hand efficient Microcontroller based system

                                                                                                                                          Fast charging capacity

                                                                                                                                          Simple to operate

                                                                                                                                          Ease of mobility

                                                                                                                                          Facilitates connectivity for 90 of cellular phones

                                                                                                                                          Less expensive

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Reduced man power

                                                                                                                                          Low power consumption

                                                                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                          CHAPTER 15

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          DISADVANTAGES

                                                                                                                                          OF THE PROJECT

                                                                                                                                          Disadvantages

                                                                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                                                                          It requires mains supply to work project

                                                                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                          min

                                                                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                                                                          CHAPTER 16

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          APPLICATIONS OF

                                                                                                                                          THE PROJECT

                                                                                                                                          Application

                                                                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                          charge for the mobile phone in any places

                                                                                                                                          It is used for emergency charging purposes

                                                                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                                                                          places

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                          any location where there is a high footfall creating a large number of

                                                                                                                                          potential users

                                                                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                                                                          CHAPTER 17

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          FUTURE

                                                                                                                                          DEVELOPMENT OF

                                                                                                                                          THE PROJECT

                                                                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                                                                          condition in public places

                                                                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                          It will provide battery backup for make it portable

                                                                                                                                          It will also provide SMS system in future

                                                                                                                                          We can also increase the charging time by editing software of the project

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          CHAPTER 18

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          COST ANALYSIS

                                                                                                                                          OF THE PROJECT

                                                                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                                                                          1811 Component list for power supply card

                                                                                                                                          Footprint Quantity Designators Rate

                                                                                                                                          Resistor

                                                                                                                                          22K 1 R2 1

                                                                                                                                          1K 1 R1 1

                                                                                                                                          Capacitor

                                                                                                                                          1000uf25V 1 C5 10

                                                                                                                                          2200uf25V 1 C1 10

                                                                                                                                          022uf 2 C6 C2 1

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                          Table 1811 Component list for power supply card

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          01uf 2 C4 C3 1

                                                                                                                                          IC

                                                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                                                          Connector

                                                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                                                          Heat sink (TO-220) 2 16

                                                                                                                                          Total 955

                                                                                                                                          1812 Component list for battery charger card

                                                                                                                                          Footprint Quantity Rate

                                                                                                                                          Capacitor

                                                                                                                                          2200uf25V 1 1000

                                                                                                                                          022uf 4 100

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          01uf 4 100

                                                                                                                                          IC

                                                                                                                                          BRIDGE W10 1 500

                                                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                                                          Connector

                                                                                                                                          CON PHO 2PIN 1 800

                                                                                                                                          Relimate 2 pin 1 400

                                                                                                                                          relimate 3 pin 4 2000

                                                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                                                          TOTAL 9300

                                                                                                                                          1813 Component list for Relay card

                                                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                          Table 1812Component list for battery charger card

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                          Total 18900

                                                                                                                                          1814Component list for controller card

                                                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                          Table 1813Component list for relay card

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                          total 27000

                                                                                                                                          1815 Miscellaneous material

                                                                                                                                          Material Quantity Rate

                                                                                                                                          electronic item

                                                                                                                                          Transformer

                                                                                                                                          TXR1 0-9-15 1 20000

                                                                                                                                          0-9 1A

                                                                                                                                          0-15 100mA

                                                                                                                                          TXR2 0-9 1 16500

                                                                                                                                          0-9 1A

                                                                                                                                          Proximity switch 1 20000

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                          Table 1814Component list for microcontroller card

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Red push bottom 4 4000

                                                                                                                                          Green push button 1 1000

                                                                                                                                          Red led 5mm 4 800

                                                                                                                                          Green led 5mm 4 800

                                                                                                                                          Led holder 8 1600

                                                                                                                                          Copper clad 2 4000

                                                                                                                                          3 core cable 1 meter 1500

                                                                                                                                          3 pin plug 1 3000

                                                                                                                                          2 pin relimate wire 19 9000

                                                                                                                                          3 pin relimate wire 5 3750

                                                                                                                                          4 pin relimate wire 2 2000

                                                                                                                                          mechanical items

                                                                                                                                          Enclosure 1 25000

                                                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                                                          12mm cable gland 1 1000

                                                                                                                                          Screw 3mm 33 2000

                                                                                                                                          Screw 35mm 6 2400

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          10 mm spacers 100 1500

                                                                                                                                          10mm insert to stud 50 10000

                                                                                                                                          cable tie 2500

                                                                                                                                          Total 162350

                                                                                                                                          CHAPTER 19

                                                                                                                                          APPENDIX

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          APPENDIX

                                                                                                                                          191 APPENDIX

                                                                                                                                          1911 78xx IC datasheet

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          1912 W10 datasheet

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          1913 4n33 IC datasheet

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                          1914 MAX 232

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          CHAPTER 20

                                                                                                                                          CONCLUSION

                                                                                                                                          CONCLUSION

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          201 CONCLUSION

                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                          installed in any business premises

                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          CHAPTER 21

                                                                                                                                          IMAGES OF THE

                                                                                                                                          PROJECT

                                                                                                                                          Images of the project

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          CHAPTER 22

                                                                                                                                          BIBILOGRAPHY

                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                          BOOKS

                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                          INTERNET LINKS

                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                          • CHAPTER 1

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            start of main programme

                                                                                                                                            void main()

                                                                                                                                            init_timer() call it timer initialization function

                                                                                                                                            REady_LED1=0REady_LED2=0REady_LED3=0REady_LED4=0 clear Ready indication led

                                                                                                                                            START_LED1=0START_LED2=0START_LED3=0START_LED4=0 clear start indication led

                                                                                                                                            start of while loop

                                                                                                                                            while(1) while loop with condition always equal to 1 to repeat loop infinite times unless and until we shut down the system

                                                                                                                                            condition for switch1

                                                                                                                                            if(flag1==1) check swich1 pressed if(disp1==1 )

                                                                                                                                            REady_LED1=1 turn on Ready indication of led 1 disp1=0

                                                                                                                                            if(flag5==1) check coin is pressed if(flag6==1) START is pressed and start conversion

                                                                                                                                            if(iltk) loop will repeat for desired time of charging

                                                                                                                                            if(igt=1000)

                                                                                                                                            buzzer=1 turn on buzzer if (ii==20)

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 70

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            REady_LED1=1 turn on ready indication of led1

                                                                                                                                            else if(ii==40)

                                                                                                                                            REady_LED1=0ii=0

                                                                                                                                            elseREady_LED1=0

                                                                                                                                            START_LED1=1

                                                                                                                                            else

                                                                                                                                            START_LED1=0

                                                                                                                                            k1=1 buzzer=0

                                                                                                                                            REady_LED1=0 flag1=0

                                                                                                                                            flag5=0flag6=0

                                                                                                                                            condition for switch2

                                                                                                                                            if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                            REady_LED2=1 turn on ready 2 led indication

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            disp2=0

                                                                                                                                            if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                            if(jltk)

                                                                                                                                            if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                            REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                            elseREady_LED2=0

                                                                                                                                            START_LED2=1

                                                                                                                                            else START_LED2=0

                                                                                                                                            REady_LED2=0 k2=1 buzzer=0

                                                                                                                                            flag2=0flag7=0flag8=0

                                                                                                                                            j=0jj=0

                                                                                                                                            condition for switch 3

                                                                                                                                            if(flag3==1) check swich3 pressed

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            if(disp3==1 )

                                                                                                                                            REady_LED3=1 disp3=0

                                                                                                                                            if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                            if(lltk)

                                                                                                                                            if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                            REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                            elseREady_LED3=0

                                                                                                                                            START_LED3=1

                                                                                                                                            else START_LED3=0

                                                                                                                                            LED2=0 k3=1 buzzer=0

                                                                                                                                            REady_LED3=0 flag3=0

                                                                                                                                            flag9=0flag10=0

                                                                                                                                            l=0ll=0

                                                                                                                                            condition for switch 4

                                                                                                                                            if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            REady_LED4=1 disp4=0

                                                                                                                                            if(flag11==1) check coin is pressed

                                                                                                                                            if(flag12==1) START is pressed

                                                                                                                                            if(mltk)

                                                                                                                                            if(mgt1000)

                                                                                                                                            buzzer=1 if(mm==20)

                                                                                                                                            REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                            elseREady_LED4=0

                                                                                                                                            START_LED4=1

                                                                                                                                            else START_LED4=0

                                                                                                                                            buzzer=0 k4=1

                                                                                                                                            REady_LED4=0 flag4=0

                                                                                                                                            flag11=0flag12=0

                                                                                                                                            m=0mm=0

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            while(1)

                                                                                                                                            end of main programme

                                                                                                                                            timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                            TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                            whenever specific time the interrupt will generate control will go in following function

                                                                                                                                            void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                            my_delay(10) CALL DELAY FUNCTION

                                                                                                                                            flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                            if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                            if(flag7==1) SET THE FLAG

                                                                                                                                            flag7=1

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                            flag9=1

                                                                                                                                            elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                            flag11=1

                                                                                                                                            elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                            IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                            my_delay (10)

                                                                                                                                            flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                            if(flag5==1)

                                                                                                                                            flag5=1

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                            flag9=1

                                                                                                                                            elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                            flag11=1

                                                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                                                            IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                            flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                            if(flag7==1)

                                                                                                                                            flag7=1

                                                                                                                                            else

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                            flag5=1

                                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                            flag11=1

                                                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                            if(flag7==1)

                                                                                                                                            flag7=1

                                                                                                                                            elseflag7=0

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                            flag5=1

                                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                            flag9=1

                                                                                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                            if(flag6==1)

                                                                                                                                            i++ if (igt1000) ii++

                                                                                                                                            if (flag8==1)

                                                                                                                                            j++ if(jgt1000) jj++

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            if (flag10==1)

                                                                                                                                            l++ if (lgt1000) ll++

                                                                                                                                            if (flag12==1)

                                                                                                                                            m++ if (mgt1000) mm++

                                                                                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            CHAPTER 13

                                                                                                                                            TROUBLE SHOOT

                                                                                                                                            Troubleshoot

                                                                                                                                            131 TROUBLE SHOOT

                                                                                                                                            A newly assembled circuit does not work may be due to -

                                                                                                                                            Faulty components

                                                                                                                                            Improper soldering

                                                                                                                                            Wrong connections

                                                                                                                                            Also any stop in working after some period may be due to -

                                                                                                                                            Component failure

                                                                                                                                            Supply failure

                                                                                                                                            Damaging of PCB

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                            proper soldering

                                                                                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                            Resistance measurement is also done which is known as Dry test

                                                                                                                                            During this project work some green LEDs was not glow then we checked it

                                                                                                                                            continuity and replace it

                                                                                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                            during soldering PCB We solved that problem

                                                                                                                                            CHAPTER 14

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            ADVANTAGES OF

                                                                                                                                            THE PROJECT

                                                                                                                                            Advantages

                                                                                                                                            141 ADVANTAGES OF THE PROJECT

                                                                                                                                            Simple and hand efficient Microcontroller based system

                                                                                                                                            Fast charging capacity

                                                                                                                                            Simple to operate

                                                                                                                                            Ease of mobility

                                                                                                                                            Facilitates connectivity for 90 of cellular phones

                                                                                                                                            Less expensive

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Reduced man power

                                                                                                                                            Low power consumption

                                                                                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                            CHAPTER 15

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            DISADVANTAGES

                                                                                                                                            OF THE PROJECT

                                                                                                                                            Disadvantages

                                                                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                                                                            It requires mains supply to work project

                                                                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                            min

                                                                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                                                                            CHAPTER 16

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            APPLICATIONS OF

                                                                                                                                            THE PROJECT

                                                                                                                                            Application

                                                                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                            charge for the mobile phone in any places

                                                                                                                                            It is used for emergency charging purposes

                                                                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                                                                            places

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                            any location where there is a high footfall creating a large number of

                                                                                                                                            potential users

                                                                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                                                                            CHAPTER 17

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            FUTURE

                                                                                                                                            DEVELOPMENT OF

                                                                                                                                            THE PROJECT

                                                                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                                                                            condition in public places

                                                                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                            It will provide battery backup for make it portable

                                                                                                                                            It will also provide SMS system in future

                                                                                                                                            We can also increase the charging time by editing software of the project

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            CHAPTER 18

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            COST ANALYSIS

                                                                                                                                            OF THE PROJECT

                                                                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                                                                            1811 Component list for power supply card

                                                                                                                                            Footprint Quantity Designators Rate

                                                                                                                                            Resistor

                                                                                                                                            22K 1 R2 1

                                                                                                                                            1K 1 R1 1

                                                                                                                                            Capacitor

                                                                                                                                            1000uf25V 1 C5 10

                                                                                                                                            2200uf25V 1 C1 10

                                                                                                                                            022uf 2 C6 C2 1

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                            Table 1811 Component list for power supply card

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            01uf 2 C4 C3 1

                                                                                                                                            IC

                                                                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                                                                            Connector

                                                                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                                                                            CON PHO 3PIN 1 J1 12

                                                                                                                                            LED3mm red 2 L1 L2 15

                                                                                                                                            Heat sink (TO-220) 2 16

                                                                                                                                            Total 955

                                                                                                                                            1812 Component list for battery charger card

                                                                                                                                            Footprint Quantity Rate

                                                                                                                                            Capacitor

                                                                                                                                            2200uf25V 1 1000

                                                                                                                                            022uf 4 100

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            01uf 4 100

                                                                                                                                            IC

                                                                                                                                            BRIDGE W10 1 500

                                                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                                                            Connector

                                                                                                                                            CON PHO 2PIN 1 800

                                                                                                                                            Relimate 2 pin 1 400

                                                                                                                                            relimate 3 pin 4 2000

                                                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                                                            TOTAL 9300

                                                                                                                                            1813 Component list for Relay card

                                                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                            Table 1812Component list for battery charger card

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                            Total 18900

                                                                                                                                            1814Component list for controller card

                                                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                            Table 1813Component list for relay card

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                            total 27000

                                                                                                                                            1815 Miscellaneous material

                                                                                                                                            Material Quantity Rate

                                                                                                                                            electronic item

                                                                                                                                            Transformer

                                                                                                                                            TXR1 0-9-15 1 20000

                                                                                                                                            0-9 1A

                                                                                                                                            0-15 100mA

                                                                                                                                            TXR2 0-9 1 16500

                                                                                                                                            0-9 1A

                                                                                                                                            Proximity switch 1 20000

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                            Table 1814Component list for microcontroller card

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Red push bottom 4 4000

                                                                                                                                            Green push button 1 1000

                                                                                                                                            Red led 5mm 4 800

                                                                                                                                            Green led 5mm 4 800

                                                                                                                                            Led holder 8 1600

                                                                                                                                            Copper clad 2 4000

                                                                                                                                            3 core cable 1 meter 1500

                                                                                                                                            3 pin plug 1 3000

                                                                                                                                            2 pin relimate wire 19 9000

                                                                                                                                            3 pin relimate wire 5 3750

                                                                                                                                            4 pin relimate wire 2 2000

                                                                                                                                            mechanical items

                                                                                                                                            Enclosure 1 25000

                                                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                                                            12mm cable gland 1 1000

                                                                                                                                            Screw 3mm 33 2000

                                                                                                                                            Screw 35mm 6 2400

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            10 mm spacers 100 1500

                                                                                                                                            10mm insert to stud 50 10000

                                                                                                                                            cable tie 2500

                                                                                                                                            Total 162350

                                                                                                                                            CHAPTER 19

                                                                                                                                            APPENDIX

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            APPENDIX

                                                                                                                                            191 APPENDIX

                                                                                                                                            1911 78xx IC datasheet

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            1912 W10 datasheet

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            1913 4n33 IC datasheet

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                            1914 MAX 232

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            CHAPTER 20

                                                                                                                                            CONCLUSION

                                                                                                                                            CONCLUSION

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            201 CONCLUSION

                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                            installed in any business premises

                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            CHAPTER 21

                                                                                                                                            IMAGES OF THE

                                                                                                                                            PROJECT

                                                                                                                                            Images of the project

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            CHAPTER 22

                                                                                                                                            BIBILOGRAPHY

                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                            BOOKS

                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                            INTERNET LINKS

                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                            • CHAPTER 1

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              REady_LED1=1 turn on ready indication of led1

                                                                                                                                              else if(ii==40)

                                                                                                                                              REady_LED1=0ii=0

                                                                                                                                              elseREady_LED1=0

                                                                                                                                              START_LED1=1

                                                                                                                                              else

                                                                                                                                              START_LED1=0

                                                                                                                                              k1=1 buzzer=0

                                                                                                                                              REady_LED1=0 flag1=0

                                                                                                                                              flag5=0flag6=0

                                                                                                                                              condition for switch2

                                                                                                                                              if(flag2==1) check swich2 pressed if(disp2==1)

                                                                                                                                              REady_LED2=1 turn on ready 2 led indication

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 71

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              disp2=0

                                                                                                                                              if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                              if(jltk)

                                                                                                                                              if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                              REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                              elseREady_LED2=0

                                                                                                                                              START_LED2=1

                                                                                                                                              else START_LED2=0

                                                                                                                                              REady_LED2=0 k2=1 buzzer=0

                                                                                                                                              flag2=0flag7=0flag8=0

                                                                                                                                              j=0jj=0

                                                                                                                                              condition for switch 3

                                                                                                                                              if(flag3==1) check swich3 pressed

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              if(disp3==1 )

                                                                                                                                              REady_LED3=1 disp3=0

                                                                                                                                              if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                              if(lltk)

                                                                                                                                              if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                              REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                              elseREady_LED3=0

                                                                                                                                              START_LED3=1

                                                                                                                                              else START_LED3=0

                                                                                                                                              LED2=0 k3=1 buzzer=0

                                                                                                                                              REady_LED3=0 flag3=0

                                                                                                                                              flag9=0flag10=0

                                                                                                                                              l=0ll=0

                                                                                                                                              condition for switch 4

                                                                                                                                              if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              REady_LED4=1 disp4=0

                                                                                                                                              if(flag11==1) check coin is pressed

                                                                                                                                              if(flag12==1) START is pressed

                                                                                                                                              if(mltk)

                                                                                                                                              if(mgt1000)

                                                                                                                                              buzzer=1 if(mm==20)

                                                                                                                                              REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                              elseREady_LED4=0

                                                                                                                                              START_LED4=1

                                                                                                                                              else START_LED4=0

                                                                                                                                              buzzer=0 k4=1

                                                                                                                                              REady_LED4=0 flag4=0

                                                                                                                                              flag11=0flag12=0

                                                                                                                                              m=0mm=0

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              while(1)

                                                                                                                                              end of main programme

                                                                                                                                              timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                              TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                              whenever specific time the interrupt will generate control will go in following function

                                                                                                                                              void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                              my_delay(10) CALL DELAY FUNCTION

                                                                                                                                              flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                              if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                              if(flag7==1) SET THE FLAG

                                                                                                                                              flag7=1

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                              flag9=1

                                                                                                                                              elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                              flag11=1

                                                                                                                                              elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                              IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                              my_delay (10)

                                                                                                                                              flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                              if(flag5==1)

                                                                                                                                              flag5=1

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                              flag9=1

                                                                                                                                              elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                              flag11=1

                                                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                                                              IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                              flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                              if(flag7==1)

                                                                                                                                              flag7=1

                                                                                                                                              else

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                              flag5=1

                                                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                              flag11=1

                                                                                                                                              elseflag11=0flag4=0REady_LED4=0

                                                                                                                                              IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                              if(flag7==1)

                                                                                                                                              flag7=1

                                                                                                                                              elseflag7=0

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                              flag5=1

                                                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                              flag9=1

                                                                                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                              if(flag6==1)

                                                                                                                                              i++ if (igt1000) ii++

                                                                                                                                              if (flag8==1)

                                                                                                                                              j++ if(jgt1000) jj++

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              if (flag10==1)

                                                                                                                                              l++ if (lgt1000) ll++

                                                                                                                                              if (flag12==1)

                                                                                                                                              m++ if (mgt1000) mm++

                                                                                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              CHAPTER 13

                                                                                                                                              TROUBLE SHOOT

                                                                                                                                              Troubleshoot

                                                                                                                                              131 TROUBLE SHOOT

                                                                                                                                              A newly assembled circuit does not work may be due to -

                                                                                                                                              Faulty components

                                                                                                                                              Improper soldering

                                                                                                                                              Wrong connections

                                                                                                                                              Also any stop in working after some period may be due to -

                                                                                                                                              Component failure

                                                                                                                                              Supply failure

                                                                                                                                              Damaging of PCB

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                              proper soldering

                                                                                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                              Resistance measurement is also done which is known as Dry test

                                                                                                                                              During this project work some green LEDs was not glow then we checked it

                                                                                                                                              continuity and replace it

                                                                                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                              during soldering PCB We solved that problem

                                                                                                                                              CHAPTER 14

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              ADVANTAGES OF

                                                                                                                                              THE PROJECT

                                                                                                                                              Advantages

                                                                                                                                              141 ADVANTAGES OF THE PROJECT

                                                                                                                                              Simple and hand efficient Microcontroller based system

                                                                                                                                              Fast charging capacity

                                                                                                                                              Simple to operate

                                                                                                                                              Ease of mobility

                                                                                                                                              Facilitates connectivity for 90 of cellular phones

                                                                                                                                              Less expensive

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Reduced man power

                                                                                                                                              Low power consumption

                                                                                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                              CHAPTER 15

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              DISADVANTAGES

                                                                                                                                              OF THE PROJECT

                                                                                                                                              Disadvantages

                                                                                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                                                                                              It requires mains supply to work project

                                                                                                                                              Due to limited charging channels till now there may be a possibility that

                                                                                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                              min

                                                                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                                                                              CHAPTER 16

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              APPLICATIONS OF

                                                                                                                                              THE PROJECT

                                                                                                                                              Application

                                                                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                              charge for the mobile phone in any places

                                                                                                                                              It is used for emergency charging purposes

                                                                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                                                                              places

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                              any location where there is a high footfall creating a large number of

                                                                                                                                              potential users

                                                                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                                                                              CHAPTER 17

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              FUTURE

                                                                                                                                              DEVELOPMENT OF

                                                                                                                                              THE PROJECT

                                                                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                                                                              condition in public places

                                                                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                              It will provide battery backup for make it portable

                                                                                                                                              It will also provide SMS system in future

                                                                                                                                              We can also increase the charging time by editing software of the project

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              CHAPTER 18

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              COST ANALYSIS

                                                                                                                                              OF THE PROJECT

                                                                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                                                                              1811 Component list for power supply card

                                                                                                                                              Footprint Quantity Designators Rate

                                                                                                                                              Resistor

                                                                                                                                              22K 1 R2 1

                                                                                                                                              1K 1 R1 1

                                                                                                                                              Capacitor

                                                                                                                                              1000uf25V 1 C5 10

                                                                                                                                              2200uf25V 1 C1 10

                                                                                                                                              022uf 2 C6 C2 1

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                              Table 1811 Component list for power supply card

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              01uf 2 C4 C3 1

                                                                                                                                              IC

                                                                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                                                                              Connector

                                                                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                                                                              CON PHO 3PIN 1 J1 12

                                                                                                                                              LED3mm red 2 L1 L2 15

                                                                                                                                              Heat sink (TO-220) 2 16

                                                                                                                                              Total 955

                                                                                                                                              1812 Component list for battery charger card

                                                                                                                                              Footprint Quantity Rate

                                                                                                                                              Capacitor

                                                                                                                                              2200uf25V 1 1000

                                                                                                                                              022uf 4 100

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              01uf 4 100

                                                                                                                                              IC

                                                                                                                                              BRIDGE W10 1 500

                                                                                                                                              L7805CV (TO-220) 4 3200

                                                                                                                                              Connector

                                                                                                                                              CON PHO 2PIN 1 800

                                                                                                                                              Relimate 2 pin 1 400

                                                                                                                                              relimate 3 pin 4 2000

                                                                                                                                              Heat sink (TO-220) 4 1200

                                                                                                                                              TOTAL 9300

                                                                                                                                              1813 Component list for Relay card

                                                                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                              Table 1812Component list for battery charger card

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                              Total 18900

                                                                                                                                              1814Component list for controller card

                                                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                              Table 1813Component list for relay card

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                              total 27000

                                                                                                                                              1815 Miscellaneous material

                                                                                                                                              Material Quantity Rate

                                                                                                                                              electronic item

                                                                                                                                              Transformer

                                                                                                                                              TXR1 0-9-15 1 20000

                                                                                                                                              0-9 1A

                                                                                                                                              0-15 100mA

                                                                                                                                              TXR2 0-9 1 16500

                                                                                                                                              0-9 1A

                                                                                                                                              Proximity switch 1 20000

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                              Table 1814Component list for microcontroller card

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Red push bottom 4 4000

                                                                                                                                              Green push button 1 1000

                                                                                                                                              Red led 5mm 4 800

                                                                                                                                              Green led 5mm 4 800

                                                                                                                                              Led holder 8 1600

                                                                                                                                              Copper clad 2 4000

                                                                                                                                              3 core cable 1 meter 1500

                                                                                                                                              3 pin plug 1 3000

                                                                                                                                              2 pin relimate wire 19 9000

                                                                                                                                              3 pin relimate wire 5 3750

                                                                                                                                              4 pin relimate wire 2 2000

                                                                                                                                              mechanical items

                                                                                                                                              Enclosure 1 25000

                                                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                                                              12mm cable gland 1 1000

                                                                                                                                              Screw 3mm 33 2000

                                                                                                                                              Screw 35mm 6 2400

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              10 mm spacers 100 1500

                                                                                                                                              10mm insert to stud 50 10000

                                                                                                                                              cable tie 2500

                                                                                                                                              Total 162350

                                                                                                                                              CHAPTER 19

                                                                                                                                              APPENDIX

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              APPENDIX

                                                                                                                                              191 APPENDIX

                                                                                                                                              1911 78xx IC datasheet

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              1912 W10 datasheet

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              1913 4n33 IC datasheet

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                              1914 MAX 232

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              CHAPTER 20

                                                                                                                                              CONCLUSION

                                                                                                                                              CONCLUSION

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              201 CONCLUSION

                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                              installed in any business premises

                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              CHAPTER 21

                                                                                                                                              IMAGES OF THE

                                                                                                                                              PROJECT

                                                                                                                                              Images of the project

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              CHAPTER 22

                                                                                                                                              BIBILOGRAPHY

                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                              BOOKS

                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                              INTERNET LINKS

                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                              • CHAPTER 1

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                disp2=0

                                                                                                                                                if(flag7==1) check coin is pressed if(flag8==1) START is pressed

                                                                                                                                                if(jltk)

                                                                                                                                                if(jgt1000) buzzer=1 if(jj==20)

                                                                                                                                                REady_LED2=1else if(jj==40)REady_LED2=0jj=0

                                                                                                                                                elseREady_LED2=0

                                                                                                                                                START_LED2=1

                                                                                                                                                else START_LED2=0

                                                                                                                                                REady_LED2=0 k2=1 buzzer=0

                                                                                                                                                flag2=0flag7=0flag8=0

                                                                                                                                                j=0jj=0

                                                                                                                                                condition for switch 3

                                                                                                                                                if(flag3==1) check swich3 pressed

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 72

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                if(disp3==1 )

                                                                                                                                                REady_LED3=1 disp3=0

                                                                                                                                                if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                                if(lltk)

                                                                                                                                                if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                                REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                                elseREady_LED3=0

                                                                                                                                                START_LED3=1

                                                                                                                                                else START_LED3=0

                                                                                                                                                LED2=0 k3=1 buzzer=0

                                                                                                                                                REady_LED3=0 flag3=0

                                                                                                                                                flag9=0flag10=0

                                                                                                                                                l=0ll=0

                                                                                                                                                condition for switch 4

                                                                                                                                                if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                REady_LED4=1 disp4=0

                                                                                                                                                if(flag11==1) check coin is pressed

                                                                                                                                                if(flag12==1) START is pressed

                                                                                                                                                if(mltk)

                                                                                                                                                if(mgt1000)

                                                                                                                                                buzzer=1 if(mm==20)

                                                                                                                                                REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                                elseREady_LED4=0

                                                                                                                                                START_LED4=1

                                                                                                                                                else START_LED4=0

                                                                                                                                                buzzer=0 k4=1

                                                                                                                                                REady_LED4=0 flag4=0

                                                                                                                                                flag11=0flag12=0

                                                                                                                                                m=0mm=0

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                while(1)

                                                                                                                                                end of main programme

                                                                                                                                                timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                                TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                                whenever specific time the interrupt will generate control will go in following function

                                                                                                                                                void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                                my_delay(10) CALL DELAY FUNCTION

                                                                                                                                                flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                                if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                                if(flag7==1) SET THE FLAG

                                                                                                                                                flag7=1

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                                flag9=1

                                                                                                                                                elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                                flag11=1

                                                                                                                                                elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                                IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                                my_delay (10)

                                                                                                                                                flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                                if(flag5==1)

                                                                                                                                                flag5=1

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                flag9=1

                                                                                                                                                elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                flag11=1

                                                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                if(flag7==1)

                                                                                                                                                flag7=1

                                                                                                                                                else

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                flag5=1

                                                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                flag11=1

                                                                                                                                                elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                if(flag7==1)

                                                                                                                                                flag7=1

                                                                                                                                                elseflag7=0

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                flag5=1

                                                                                                                                                elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                flag9=1

                                                                                                                                                elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                if(flag6==1)

                                                                                                                                                i++ if (igt1000) ii++

                                                                                                                                                if (flag8==1)

                                                                                                                                                j++ if(jgt1000) jj++

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                if (flag10==1)

                                                                                                                                                l++ if (lgt1000) ll++

                                                                                                                                                if (flag12==1)

                                                                                                                                                m++ if (mgt1000) mm++

                                                                                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                CHAPTER 13

                                                                                                                                                TROUBLE SHOOT

                                                                                                                                                Troubleshoot

                                                                                                                                                131 TROUBLE SHOOT

                                                                                                                                                A newly assembled circuit does not work may be due to -

                                                                                                                                                Faulty components

                                                                                                                                                Improper soldering

                                                                                                                                                Wrong connections

                                                                                                                                                Also any stop in working after some period may be due to -

                                                                                                                                                Component failure

                                                                                                                                                Supply failure

                                                                                                                                                Damaging of PCB

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                proper soldering

                                                                                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                Resistance measurement is also done which is known as Dry test

                                                                                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                                                                                continuity and replace it

                                                                                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                during soldering PCB We solved that problem

                                                                                                                                                CHAPTER 14

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                ADVANTAGES OF

                                                                                                                                                THE PROJECT

                                                                                                                                                Advantages

                                                                                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                                                                                Simple and hand efficient Microcontroller based system

                                                                                                                                                Fast charging capacity

                                                                                                                                                Simple to operate

                                                                                                                                                Ease of mobility

                                                                                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                                                                                Less expensive

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Reduced man power

                                                                                                                                                Low power consumption

                                                                                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                CHAPTER 15

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                DISADVANTAGES

                                                                                                                                                OF THE PROJECT

                                                                                                                                                Disadvantages

                                                                                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                It requires mains supply to work project

                                                                                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                min

                                                                                                                                                It does not have battery backup therefore it cannot be portable

                                                                                                                                                CHAPTER 16

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                APPLICATIONS OF

                                                                                                                                                THE PROJECT

                                                                                                                                                Application

                                                                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                charge for the mobile phone in any places

                                                                                                                                                It is used for emergency charging purposes

                                                                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                                                                places

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                any location where there is a high footfall creating a large number of

                                                                                                                                                potential users

                                                                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                                                                CHAPTER 17

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                FUTURE

                                                                                                                                                DEVELOPMENT OF

                                                                                                                                                THE PROJECT

                                                                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                                                                condition in public places

                                                                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                It will provide battery backup for make it portable

                                                                                                                                                It will also provide SMS system in future

                                                                                                                                                We can also increase the charging time by editing software of the project

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                CHAPTER 18

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                COST ANALYSIS

                                                                                                                                                OF THE PROJECT

                                                                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                1811 Component list for power supply card

                                                                                                                                                Footprint Quantity Designators Rate

                                                                                                                                                Resistor

                                                                                                                                                22K 1 R2 1

                                                                                                                                                1K 1 R1 1

                                                                                                                                                Capacitor

                                                                                                                                                1000uf25V 1 C5 10

                                                                                                                                                2200uf25V 1 C1 10

                                                                                                                                                022uf 2 C6 C2 1

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                Table 1811 Component list for power supply card

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                01uf 2 C4 C3 1

                                                                                                                                                IC

                                                                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                                                                Connector

                                                                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                                                                LED3mm red 2 L1 L2 15

                                                                                                                                                Heat sink (TO-220) 2 16

                                                                                                                                                Total 955

                                                                                                                                                1812 Component list for battery charger card

                                                                                                                                                Footprint Quantity Rate

                                                                                                                                                Capacitor

                                                                                                                                                2200uf25V 1 1000

                                                                                                                                                022uf 4 100

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                01uf 4 100

                                                                                                                                                IC

                                                                                                                                                BRIDGE W10 1 500

                                                                                                                                                L7805CV (TO-220) 4 3200

                                                                                                                                                Connector

                                                                                                                                                CON PHO 2PIN 1 800

                                                                                                                                                Relimate 2 pin 1 400

                                                                                                                                                relimate 3 pin 4 2000

                                                                                                                                                Heat sink (TO-220) 4 1200

                                                                                                                                                TOTAL 9300

                                                                                                                                                1813 Component list for Relay card

                                                                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                Table 1812Component list for battery charger card

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                Total 18900

                                                                                                                                                1814Component list for controller card

                                                                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                Table 1813Component list for relay card

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                total 27000

                                                                                                                                                1815 Miscellaneous material

                                                                                                                                                Material Quantity Rate

                                                                                                                                                electronic item

                                                                                                                                                Transformer

                                                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                                                0-9 1A

                                                                                                                                                0-15 100mA

                                                                                                                                                TXR2 0-9 1 16500

                                                                                                                                                0-9 1A

                                                                                                                                                Proximity switch 1 20000

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Red push bottom 4 4000

                                                                                                                                                Green push button 1 1000

                                                                                                                                                Red led 5mm 4 800

                                                                                                                                                Green led 5mm 4 800

                                                                                                                                                Led holder 8 1600

                                                                                                                                                Copper clad 2 4000

                                                                                                                                                3 core cable 1 meter 1500

                                                                                                                                                3 pin plug 1 3000

                                                                                                                                                2 pin relimate wire 19 9000

                                                                                                                                                3 pin relimate wire 5 3750

                                                                                                                                                4 pin relimate wire 2 2000

                                                                                                                                                mechanical items

                                                                                                                                                Enclosure 1 25000

                                                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                                                12mm cable gland 1 1000

                                                                                                                                                Screw 3mm 33 2000

                                                                                                                                                Screw 35mm 6 2400

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                10 mm spacers 100 1500

                                                                                                                                                10mm insert to stud 50 10000

                                                                                                                                                cable tie 2500

                                                                                                                                                Total 162350

                                                                                                                                                CHAPTER 19

                                                                                                                                                APPENDIX

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                APPENDIX

                                                                                                                                                191 APPENDIX

                                                                                                                                                1911 78xx IC datasheet

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                1912 W10 datasheet

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                1913 4n33 IC datasheet

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                1914 MAX 232

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                CHAPTER 20

                                                                                                                                                CONCLUSION

                                                                                                                                                CONCLUSION

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                201 CONCLUSION

                                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                installed in any business premises

                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                CHAPTER 21

                                                                                                                                                IMAGES OF THE

                                                                                                                                                PROJECT

                                                                                                                                                Images of the project

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                CHAPTER 22

                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                BOOKS

                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                INTERNET LINKS

                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                • CHAPTER 1

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  if(disp3==1 )

                                                                                                                                                  REady_LED3=1 disp3=0

                                                                                                                                                  if(flag9==1) check coin is pressed if(flag10==1) START is pressed

                                                                                                                                                  if(lltk)

                                                                                                                                                  if(lgt1000) buzzer=1 if(ll==20)

                                                                                                                                                  REady_LED3=1else if(ll==40)REady_LED3=0ll=0

                                                                                                                                                  elseREady_LED3=0

                                                                                                                                                  START_LED3=1

                                                                                                                                                  else START_LED3=0

                                                                                                                                                  LED2=0 k3=1 buzzer=0

                                                                                                                                                  REady_LED3=0 flag3=0

                                                                                                                                                  flag9=0flag10=0

                                                                                                                                                  l=0ll=0

                                                                                                                                                  condition for switch 4

                                                                                                                                                  if(flag4==1) check swich4 pressed if(disp4==1 )

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 73

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  REady_LED4=1 disp4=0

                                                                                                                                                  if(flag11==1) check coin is pressed

                                                                                                                                                  if(flag12==1) START is pressed

                                                                                                                                                  if(mltk)

                                                                                                                                                  if(mgt1000)

                                                                                                                                                  buzzer=1 if(mm==20)

                                                                                                                                                  REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                                  elseREady_LED4=0

                                                                                                                                                  START_LED4=1

                                                                                                                                                  else START_LED4=0

                                                                                                                                                  buzzer=0 k4=1

                                                                                                                                                  REady_LED4=0 flag4=0

                                                                                                                                                  flag11=0flag12=0

                                                                                                                                                  m=0mm=0

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  while(1)

                                                                                                                                                  end of main programme

                                                                                                                                                  timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                                  TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                                  whenever specific time the interrupt will generate control will go in following function

                                                                                                                                                  void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                                  my_delay(10) CALL DELAY FUNCTION

                                                                                                                                                  flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                                  if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                                  if(flag7==1) SET THE FLAG

                                                                                                                                                  flag7=1

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                                  flag9=1

                                                                                                                                                  elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                                  flag11=1

                                                                                                                                                  elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                                  IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                                  my_delay (10)

                                                                                                                                                  flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                                  if(flag5==1)

                                                                                                                                                  flag5=1

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                  flag9=1

                                                                                                                                                  elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                  flag11=1

                                                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                  IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                  flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                  if(flag7==1)

                                                                                                                                                  flag7=1

                                                                                                                                                  else

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                  flag5=1

                                                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                  flag11=1

                                                                                                                                                  elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                  IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                  if(flag7==1)

                                                                                                                                                  flag7=1

                                                                                                                                                  elseflag7=0

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                  flag5=1

                                                                                                                                                  elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                  flag9=1

                                                                                                                                                  elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                  IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                  if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                  IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                  if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                  if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                  if(flag6==1)

                                                                                                                                                  i++ if (igt1000) ii++

                                                                                                                                                  if (flag8==1)

                                                                                                                                                  j++ if(jgt1000) jj++

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  if (flag10==1)

                                                                                                                                                  l++ if (lgt1000) ll++

                                                                                                                                                  if (flag12==1)

                                                                                                                                                  m++ if (mgt1000) mm++

                                                                                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  CHAPTER 13

                                                                                                                                                  TROUBLE SHOOT

                                                                                                                                                  Troubleshoot

                                                                                                                                                  131 TROUBLE SHOOT

                                                                                                                                                  A newly assembled circuit does not work may be due to -

                                                                                                                                                  Faulty components

                                                                                                                                                  Improper soldering

                                                                                                                                                  Wrong connections

                                                                                                                                                  Also any stop in working after some period may be due to -

                                                                                                                                                  Component failure

                                                                                                                                                  Supply failure

                                                                                                                                                  Damaging of PCB

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                  proper soldering

                                                                                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                                                                                  continuity and replace it

                                                                                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                  during soldering PCB We solved that problem

                                                                                                                                                  CHAPTER 14

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  ADVANTAGES OF

                                                                                                                                                  THE PROJECT

                                                                                                                                                  Advantages

                                                                                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                                                                                  Simple and hand efficient Microcontroller based system

                                                                                                                                                  Fast charging capacity

                                                                                                                                                  Simple to operate

                                                                                                                                                  Ease of mobility

                                                                                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                                                                                  Less expensive

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Reduced man power

                                                                                                                                                  Low power consumption

                                                                                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                  CHAPTER 15

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  DISADVANTAGES

                                                                                                                                                  OF THE PROJECT

                                                                                                                                                  Disadvantages

                                                                                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                  It requires mains supply to work project

                                                                                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                  min

                                                                                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                                                                                  CHAPTER 16

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  APPLICATIONS OF

                                                                                                                                                  THE PROJECT

                                                                                                                                                  Application

                                                                                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                  charge for the mobile phone in any places

                                                                                                                                                  It is used for emergency charging purposes

                                                                                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                                                                                  places

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                                                                  potential users

                                                                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                                                                  CHAPTER 17

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  FUTURE

                                                                                                                                                  DEVELOPMENT OF

                                                                                                                                                  THE PROJECT

                                                                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                                                                  condition in public places

                                                                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                  It will provide battery backup for make it portable

                                                                                                                                                  It will also provide SMS system in future

                                                                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  CHAPTER 18

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  COST ANALYSIS

                                                                                                                                                  OF THE PROJECT

                                                                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                  1811 Component list for power supply card

                                                                                                                                                  Footprint Quantity Designators Rate

                                                                                                                                                  Resistor

                                                                                                                                                  22K 1 R2 1

                                                                                                                                                  1K 1 R1 1

                                                                                                                                                  Capacitor

                                                                                                                                                  1000uf25V 1 C5 10

                                                                                                                                                  2200uf25V 1 C1 10

                                                                                                                                                  022uf 2 C6 C2 1

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                  Table 1811 Component list for power supply card

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  01uf 2 C4 C3 1

                                                                                                                                                  IC

                                                                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                                                                  Connector

                                                                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                                                                  Heat sink (TO-220) 2 16

                                                                                                                                                  Total 955

                                                                                                                                                  1812 Component list for battery charger card

                                                                                                                                                  Footprint Quantity Rate

                                                                                                                                                  Capacitor

                                                                                                                                                  2200uf25V 1 1000

                                                                                                                                                  022uf 4 100

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  01uf 4 100

                                                                                                                                                  IC

                                                                                                                                                  BRIDGE W10 1 500

                                                                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                                                                  Connector

                                                                                                                                                  CON PHO 2PIN 1 800

                                                                                                                                                  Relimate 2 pin 1 400

                                                                                                                                                  relimate 3 pin 4 2000

                                                                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                                                                  TOTAL 9300

                                                                                                                                                  1813 Component list for Relay card

                                                                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                  Table 1812Component list for battery charger card

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                  Total 18900

                                                                                                                                                  1814Component list for controller card

                                                                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                  Table 1813Component list for relay card

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                  total 27000

                                                                                                                                                  1815 Miscellaneous material

                                                                                                                                                  Material Quantity Rate

                                                                                                                                                  electronic item

                                                                                                                                                  Transformer

                                                                                                                                                  TXR1 0-9-15 1 20000

                                                                                                                                                  0-9 1A

                                                                                                                                                  0-15 100mA

                                                                                                                                                  TXR2 0-9 1 16500

                                                                                                                                                  0-9 1A

                                                                                                                                                  Proximity switch 1 20000

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                  Table 1814Component list for microcontroller card

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Red push bottom 4 4000

                                                                                                                                                  Green push button 1 1000

                                                                                                                                                  Red led 5mm 4 800

                                                                                                                                                  Green led 5mm 4 800

                                                                                                                                                  Led holder 8 1600

                                                                                                                                                  Copper clad 2 4000

                                                                                                                                                  3 core cable 1 meter 1500

                                                                                                                                                  3 pin plug 1 3000

                                                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                                                  mechanical items

                                                                                                                                                  Enclosure 1 25000

                                                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                                                  12mm cable gland 1 1000

                                                                                                                                                  Screw 3mm 33 2000

                                                                                                                                                  Screw 35mm 6 2400

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  10 mm spacers 100 1500

                                                                                                                                                  10mm insert to stud 50 10000

                                                                                                                                                  cable tie 2500

                                                                                                                                                  Total 162350

                                                                                                                                                  CHAPTER 19

                                                                                                                                                  APPENDIX

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  APPENDIX

                                                                                                                                                  191 APPENDIX

                                                                                                                                                  1911 78xx IC datasheet

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                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  1912 W10 datasheet

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  1913 4n33 IC datasheet

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                  1914 MAX 232

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  CHAPTER 20

                                                                                                                                                  CONCLUSION

                                                                                                                                                  CONCLUSION

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                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  201 CONCLUSION

                                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                  installed in any business premises

                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  CHAPTER 21

                                                                                                                                                  IMAGES OF THE

                                                                                                                                                  PROJECT

                                                                                                                                                  Images of the project

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  CHAPTER 22

                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                  BOOKS

                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                  INTERNET LINKS

                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                  • CHAPTER 1

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    REady_LED4=1 disp4=0

                                                                                                                                                    if(flag11==1) check coin is pressed

                                                                                                                                                    if(flag12==1) START is pressed

                                                                                                                                                    if(mltk)

                                                                                                                                                    if(mgt1000)

                                                                                                                                                    buzzer=1 if(mm==20)

                                                                                                                                                    REady_LED4=1else if(mm==40)REady_LED4=0mm=0

                                                                                                                                                    elseREady_LED4=0

                                                                                                                                                    START_LED4=1

                                                                                                                                                    else START_LED4=0

                                                                                                                                                    buzzer=0 k4=1

                                                                                                                                                    REady_LED4=0 flag4=0

                                                                                                                                                    flag11=0flag12=0

                                                                                                                                                    m=0mm=0

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 74

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    while(1)

                                                                                                                                                    end of main programme

                                                                                                                                                    timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                                    TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                                    whenever specific time the interrupt will generate control will go in following function

                                                                                                                                                    void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                                    my_delay(10) CALL DELAY FUNCTION

                                                                                                                                                    flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                                    if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                                    if(flag7==1) SET THE FLAG

                                                                                                                                                    flag7=1

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                                    flag9=1

                                                                                                                                                    elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                                    flag11=1

                                                                                                                                                    elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                                    IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                                    my_delay (10)

                                                                                                                                                    flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                                    if(flag5==1)

                                                                                                                                                    flag5=1

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                    flag9=1

                                                                                                                                                    elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                    flag11=1

                                                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                    IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                    flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                    if(flag7==1)

                                                                                                                                                    flag7=1

                                                                                                                                                    else

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                    flag5=1

                                                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                    flag11=1

                                                                                                                                                    elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                    IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                    if(flag7==1)

                                                                                                                                                    flag7=1

                                                                                                                                                    elseflag7=0

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                    flag5=1

                                                                                                                                                    elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                    flag9=1

                                                                                                                                                    elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                    IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                    if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                    IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                    if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                    if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                    if(flag6==1)

                                                                                                                                                    i++ if (igt1000) ii++

                                                                                                                                                    if (flag8==1)

                                                                                                                                                    j++ if(jgt1000) jj++

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    if (flag10==1)

                                                                                                                                                    l++ if (lgt1000) ll++

                                                                                                                                                    if (flag12==1)

                                                                                                                                                    m++ if (mgt1000) mm++

                                                                                                                                                    DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    CHAPTER 13

                                                                                                                                                    TROUBLE SHOOT

                                                                                                                                                    Troubleshoot

                                                                                                                                                    131 TROUBLE SHOOT

                                                                                                                                                    A newly assembled circuit does not work may be due to -

                                                                                                                                                    Faulty components

                                                                                                                                                    Improper soldering

                                                                                                                                                    Wrong connections

                                                                                                                                                    Also any stop in working after some period may be due to -

                                                                                                                                                    Component failure

                                                                                                                                                    Supply failure

                                                                                                                                                    Damaging of PCB

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                    proper soldering

                                                                                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                                                                                    continuity and replace it

                                                                                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                    during soldering PCB We solved that problem

                                                                                                                                                    CHAPTER 14

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    ADVANTAGES OF

                                                                                                                                                    THE PROJECT

                                                                                                                                                    Advantages

                                                                                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                                                                                    Simple and hand efficient Microcontroller based system

                                                                                                                                                    Fast charging capacity

                                                                                                                                                    Simple to operate

                                                                                                                                                    Ease of mobility

                                                                                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                                                                                    Less expensive

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Reduced man power

                                                                                                                                                    Low power consumption

                                                                                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                    CHAPTER 15

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    DISADVANTAGES

                                                                                                                                                    OF THE PROJECT

                                                                                                                                                    Disadvantages

                                                                                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                    It requires mains supply to work project

                                                                                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                    min

                                                                                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                                                                                    CHAPTER 16

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    APPLICATIONS OF

                                                                                                                                                    THE PROJECT

                                                                                                                                                    Application

                                                                                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                    charge for the mobile phone in any places

                                                                                                                                                    It is used for emergency charging purposes

                                                                                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                                                                                    places

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                    any location where there is a high footfall creating a large number of

                                                                                                                                                    potential users

                                                                                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                                                                                    CHAPTER 17

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    FUTURE

                                                                                                                                                    DEVELOPMENT OF

                                                                                                                                                    THE PROJECT

                                                                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                                                                    condition in public places

                                                                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                    It will provide battery backup for make it portable

                                                                                                                                                    It will also provide SMS system in future

                                                                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    CHAPTER 18

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    COST ANALYSIS

                                                                                                                                                    OF THE PROJECT

                                                                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                    1811 Component list for power supply card

                                                                                                                                                    Footprint Quantity Designators Rate

                                                                                                                                                    Resistor

                                                                                                                                                    22K 1 R2 1

                                                                                                                                                    1K 1 R1 1

                                                                                                                                                    Capacitor

                                                                                                                                                    1000uf25V 1 C5 10

                                                                                                                                                    2200uf25V 1 C1 10

                                                                                                                                                    022uf 2 C6 C2 1

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                    Table 1811 Component list for power supply card

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    01uf 2 C4 C3 1

                                                                                                                                                    IC

                                                                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                                                                    Connector

                                                                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                                                                    Heat sink (TO-220) 2 16

                                                                                                                                                    Total 955

                                                                                                                                                    1812 Component list for battery charger card

                                                                                                                                                    Footprint Quantity Rate

                                                                                                                                                    Capacitor

                                                                                                                                                    2200uf25V 1 1000

                                                                                                                                                    022uf 4 100

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    01uf 4 100

                                                                                                                                                    IC

                                                                                                                                                    BRIDGE W10 1 500

                                                                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                                                                    Connector

                                                                                                                                                    CON PHO 2PIN 1 800

                                                                                                                                                    Relimate 2 pin 1 400

                                                                                                                                                    relimate 3 pin 4 2000

                                                                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                                                                    TOTAL 9300

                                                                                                                                                    1813 Component list for Relay card

                                                                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                    Table 1812Component list for battery charger card

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                    Total 18900

                                                                                                                                                    1814Component list for controller card

                                                                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                    Table 1813Component list for relay card

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                    total 27000

                                                                                                                                                    1815 Miscellaneous material

                                                                                                                                                    Material Quantity Rate

                                                                                                                                                    electronic item

                                                                                                                                                    Transformer

                                                                                                                                                    TXR1 0-9-15 1 20000

                                                                                                                                                    0-9 1A

                                                                                                                                                    0-15 100mA

                                                                                                                                                    TXR2 0-9 1 16500

                                                                                                                                                    0-9 1A

                                                                                                                                                    Proximity switch 1 20000

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                    Table 1814Component list for microcontroller card

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Red push bottom 4 4000

                                                                                                                                                    Green push button 1 1000

                                                                                                                                                    Red led 5mm 4 800

                                                                                                                                                    Green led 5mm 4 800

                                                                                                                                                    Led holder 8 1600

                                                                                                                                                    Copper clad 2 4000

                                                                                                                                                    3 core cable 1 meter 1500

                                                                                                                                                    3 pin plug 1 3000

                                                                                                                                                    2 pin relimate wire 19 9000

                                                                                                                                                    3 pin relimate wire 5 3750

                                                                                                                                                    4 pin relimate wire 2 2000

                                                                                                                                                    mechanical items

                                                                                                                                                    Enclosure 1 25000

                                                                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                                                                    12mm cable gland 1 1000

                                                                                                                                                    Screw 3mm 33 2000

                                                                                                                                                    Screw 35mm 6 2400

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    10 mm spacers 100 1500

                                                                                                                                                    10mm insert to stud 50 10000

                                                                                                                                                    cable tie 2500

                                                                                                                                                    Total 162350

                                                                                                                                                    CHAPTER 19

                                                                                                                                                    APPENDIX

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    APPENDIX

                                                                                                                                                    191 APPENDIX

                                                                                                                                                    1911 78xx IC datasheet

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    1912 W10 datasheet

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    1913 4n33 IC datasheet

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                    1914 MAX 232

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    CHAPTER 20

                                                                                                                                                    CONCLUSION

                                                                                                                                                    CONCLUSION

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    201 CONCLUSION

                                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                    installed in any business premises

                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    CHAPTER 21

                                                                                                                                                    IMAGES OF THE

                                                                                                                                                    PROJECT

                                                                                                                                                    Images of the project

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    CHAPTER 22

                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                    BOOKS

                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                    INTERNET LINKS

                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                    • CHAPTER 1

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      while(1)

                                                                                                                                                      end of main programme

                                                                                                                                                      timer delayvoid init_timer() TMOD=0x01 timer 0 in mode 1

                                                                                                                                                      TL0=0xfd timer lower valueTH0=0x4b timer higher valueIE|=0x82 interrupt control bitTR0=1 start timer bit

                                                                                                                                                      whenever specific time the interrupt will generate control will go in following function

                                                                                                                                                      void timer0_isr(void)interrupt 1 using 2 timer 0 interrupt TR0=0 reset timer TF0=0 reset over flow flag TL0=0xfd load value of TL0 TH0=0x4b LOAD VALUE OF TH0 TR0=1 SET TIMER BIT OR TURN ON TIMER IF SWITCH 1 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if(sw1_op==0 ) ready switch flag for system1

                                                                                                                                                      my_delay(10) CALL DELAY FUNCTION

                                                                                                                                                      flag1=1 SET RESPECTIVE FLAG FOR NEXT OPERATION disp1=1 k1=0

                                                                                                                                                      if(k2==0||k3==0||k4==0) IF SWITCH2OR SWITCH3 OR SWITCH 4 IS PRESSED THEN IT WILL GO INTO FOLLOWING LOOOP

                                                                                                                                                      if(flag7==1) SET THE FLAG

                                                                                                                                                      flag7=1

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 75

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                                      flag9=1

                                                                                                                                                      elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                                      flag11=1

                                                                                                                                                      elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                                      IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                                      my_delay (10)

                                                                                                                                                      flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                                      if(flag5==1)

                                                                                                                                                      flag5=1

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                      flag9=1

                                                                                                                                                      elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                      flag11=1

                                                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                      IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                      flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                      if(flag7==1)

                                                                                                                                                      flag7=1

                                                                                                                                                      else

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                      flag5=1

                                                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                      flag11=1

                                                                                                                                                      elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                      IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                      if(flag7==1)

                                                                                                                                                      flag7=1

                                                                                                                                                      elseflag7=0

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                      flag5=1

                                                                                                                                                      elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                      flag9=1

                                                                                                                                                      elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                      IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                      if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                      IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                      if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                      if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                      if(flag6==1)

                                                                                                                                                      i++ if (igt1000) ii++

                                                                                                                                                      if (flag8==1)

                                                                                                                                                      j++ if(jgt1000) jj++

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      if (flag10==1)

                                                                                                                                                      l++ if (lgt1000) ll++

                                                                                                                                                      if (flag12==1)

                                                                                                                                                      m++ if (mgt1000) mm++

                                                                                                                                                      DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      CHAPTER 13

                                                                                                                                                      TROUBLE SHOOT

                                                                                                                                                      Troubleshoot

                                                                                                                                                      131 TROUBLE SHOOT

                                                                                                                                                      A newly assembled circuit does not work may be due to -

                                                                                                                                                      Faulty components

                                                                                                                                                      Improper soldering

                                                                                                                                                      Wrong connections

                                                                                                                                                      Also any stop in working after some period may be due to -

                                                                                                                                                      Component failure

                                                                                                                                                      Supply failure

                                                                                                                                                      Damaging of PCB

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                      proper soldering

                                                                                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                                                                                      continuity and replace it

                                                                                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                      during soldering PCB We solved that problem

                                                                                                                                                      CHAPTER 14

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      ADVANTAGES OF

                                                                                                                                                      THE PROJECT

                                                                                                                                                      Advantages

                                                                                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                                                                                      Simple and hand efficient Microcontroller based system

                                                                                                                                                      Fast charging capacity

                                                                                                                                                      Simple to operate

                                                                                                                                                      Ease of mobility

                                                                                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                                                                                      Less expensive

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Reduced man power

                                                                                                                                                      Low power consumption

                                                                                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                      CHAPTER 15

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      DISADVANTAGES

                                                                                                                                                      OF THE PROJECT

                                                                                                                                                      Disadvantages

                                                                                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                      It requires mains supply to work project

                                                                                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                      min

                                                                                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                                                                                      CHAPTER 16

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      APPLICATIONS OF

                                                                                                                                                      THE PROJECT

                                                                                                                                                      Application

                                                                                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                      charge for the mobile phone in any places

                                                                                                                                                      It is used for emergency charging purposes

                                                                                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                                                                                      places

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                      any location where there is a high footfall creating a large number of

                                                                                                                                                      potential users

                                                                                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                                                                                      CHAPTER 17

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      FUTURE

                                                                                                                                                      DEVELOPMENT OF

                                                                                                                                                      THE PROJECT

                                                                                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                                                                                      condition in public places

                                                                                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                      It will provide battery backup for make it portable

                                                                                                                                                      It will also provide SMS system in future

                                                                                                                                                      We can also increase the charging time by editing software of the project

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      CHAPTER 18

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      COST ANALYSIS

                                                                                                                                                      OF THE PROJECT

                                                                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                      1811 Component list for power supply card

                                                                                                                                                      Footprint Quantity Designators Rate

                                                                                                                                                      Resistor

                                                                                                                                                      22K 1 R2 1

                                                                                                                                                      1K 1 R1 1

                                                                                                                                                      Capacitor

                                                                                                                                                      1000uf25V 1 C5 10

                                                                                                                                                      2200uf25V 1 C1 10

                                                                                                                                                      022uf 2 C6 C2 1

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                      Table 1811 Component list for power supply card

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      01uf 2 C4 C3 1

                                                                                                                                                      IC

                                                                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                                                                      Connector

                                                                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                                                                      Heat sink (TO-220) 2 16

                                                                                                                                                      Total 955

                                                                                                                                                      1812 Component list for battery charger card

                                                                                                                                                      Footprint Quantity Rate

                                                                                                                                                      Capacitor

                                                                                                                                                      2200uf25V 1 1000

                                                                                                                                                      022uf 4 100

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      01uf 4 100

                                                                                                                                                      IC

                                                                                                                                                      BRIDGE W10 1 500

                                                                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                                                                      Connector

                                                                                                                                                      CON PHO 2PIN 1 800

                                                                                                                                                      Relimate 2 pin 1 400

                                                                                                                                                      relimate 3 pin 4 2000

                                                                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                                                                      TOTAL 9300

                                                                                                                                                      1813 Component list for Relay card

                                                                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                      Table 1812Component list for battery charger card

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                      Total 18900

                                                                                                                                                      1814Component list for controller card

                                                                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                      Table 1813Component list for relay card

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                      total 27000

                                                                                                                                                      1815 Miscellaneous material

                                                                                                                                                      Material Quantity Rate

                                                                                                                                                      electronic item

                                                                                                                                                      Transformer

                                                                                                                                                      TXR1 0-9-15 1 20000

                                                                                                                                                      0-9 1A

                                                                                                                                                      0-15 100mA

                                                                                                                                                      TXR2 0-9 1 16500

                                                                                                                                                      0-9 1A

                                                                                                                                                      Proximity switch 1 20000

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                      Table 1814Component list for microcontroller card

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Red push bottom 4 4000

                                                                                                                                                      Green push button 1 1000

                                                                                                                                                      Red led 5mm 4 800

                                                                                                                                                      Green led 5mm 4 800

                                                                                                                                                      Led holder 8 1600

                                                                                                                                                      Copper clad 2 4000

                                                                                                                                                      3 core cable 1 meter 1500

                                                                                                                                                      3 pin plug 1 3000

                                                                                                                                                      2 pin relimate wire 19 9000

                                                                                                                                                      3 pin relimate wire 5 3750

                                                                                                                                                      4 pin relimate wire 2 2000

                                                                                                                                                      mechanical items

                                                                                                                                                      Enclosure 1 25000

                                                                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                                                                      12mm cable gland 1 1000

                                                                                                                                                      Screw 3mm 33 2000

                                                                                                                                                      Screw 35mm 6 2400

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      10 mm spacers 100 1500

                                                                                                                                                      10mm insert to stud 50 10000

                                                                                                                                                      cable tie 2500

                                                                                                                                                      Total 162350

                                                                                                                                                      CHAPTER 19

                                                                                                                                                      APPENDIX

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      APPENDIX

                                                                                                                                                      191 APPENDIX

                                                                                                                                                      1911 78xx IC datasheet

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      1912 W10 datasheet

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      1913 4n33 IC datasheet

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                      1914 MAX 232

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      CHAPTER 20

                                                                                                                                                      CONCLUSION

                                                                                                                                                      CONCLUSION

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      201 CONCLUSION

                                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                      installed in any business premises

                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      CHAPTER 21

                                                                                                                                                      IMAGES OF THE

                                                                                                                                                      PROJECT

                                                                                                                                                      Images of the project

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      CHAPTER 22

                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                      BOOKS

                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                      INTERNET LINKS

                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                      • CHAPTER 1

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        elseflag7=0flag2=0REady_LED2=0 CLEAR READY 2 LED if(flag9==1)

                                                                                                                                                        flag9=1

                                                                                                                                                        elseflag9=0flag3=0REady_LED3=0 CLEAR READY 3 LED if(flag11==1)

                                                                                                                                                        flag11=1

                                                                                                                                                        elseflag11=0flag4=0REady_LED4=0 CLEAR READY 4 LED

                                                                                                                                                        IF SWITCH 2 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                        if(sw2_op==0 ) fready switch flag for system2

                                                                                                                                                        my_delay (10)

                                                                                                                                                        flag2=1 disp2=1 k2=0 if(k1==0||k3==0||k4==0)

                                                                                                                                                        if(flag5==1)

                                                                                                                                                        flag5=1

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 76

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                        flag9=1

                                                                                                                                                        elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                        flag11=1

                                                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                        IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                        if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                        flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                        if(flag7==1)

                                                                                                                                                        flag7=1

                                                                                                                                                        else

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                        flag5=1

                                                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                        flag11=1

                                                                                                                                                        elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                        IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                        if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                        if(flag7==1)

                                                                                                                                                        flag7=1

                                                                                                                                                        elseflag7=0

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                        flag5=1

                                                                                                                                                        elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                        flag9=1

                                                                                                                                                        elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                        IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                        if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                        if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                        IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                        if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                        if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                        if(flag6==1)

                                                                                                                                                        i++ if (igt1000) ii++

                                                                                                                                                        if (flag8==1)

                                                                                                                                                        j++ if(jgt1000) jj++

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        if (flag10==1)

                                                                                                                                                        l++ if (lgt1000) ll++

                                                                                                                                                        if (flag12==1)

                                                                                                                                                        m++ if (mgt1000) mm++

                                                                                                                                                        DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        CHAPTER 13

                                                                                                                                                        TROUBLE SHOOT

                                                                                                                                                        Troubleshoot

                                                                                                                                                        131 TROUBLE SHOOT

                                                                                                                                                        A newly assembled circuit does not work may be due to -

                                                                                                                                                        Faulty components

                                                                                                                                                        Improper soldering

                                                                                                                                                        Wrong connections

                                                                                                                                                        Also any stop in working after some period may be due to -

                                                                                                                                                        Component failure

                                                                                                                                                        Supply failure

                                                                                                                                                        Damaging of PCB

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                        If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                        circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                        polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                        circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                        proper soldering

                                                                                                                                                        If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                        test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                        Resistance measurement is also done which is known as Dry test

                                                                                                                                                        During this project work some green LEDs was not glow then we checked it

                                                                                                                                                        continuity and replace it

                                                                                                                                                        Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                        heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                        during soldering PCB We solved that problem

                                                                                                                                                        CHAPTER 14

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        ADVANTAGES OF

                                                                                                                                                        THE PROJECT

                                                                                                                                                        Advantages

                                                                                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                                                                                        Simple and hand efficient Microcontroller based system

                                                                                                                                                        Fast charging capacity

                                                                                                                                                        Simple to operate

                                                                                                                                                        Ease of mobility

                                                                                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                                                                                        Less expensive

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Reduced man power

                                                                                                                                                        Low power consumption

                                                                                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                        CHAPTER 15

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        DISADVANTAGES

                                                                                                                                                        OF THE PROJECT

                                                                                                                                                        Disadvantages

                                                                                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                        It requires mains supply to work project

                                                                                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                        min

                                                                                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                                                                                        CHAPTER 16

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        APPLICATIONS OF

                                                                                                                                                        THE PROJECT

                                                                                                                                                        Application

                                                                                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                        charge for the mobile phone in any places

                                                                                                                                                        It is used for emergency charging purposes

                                                                                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                                                                                        places

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                        any location where there is a high footfall creating a large number of

                                                                                                                                                        potential users

                                                                                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                                                                                        CHAPTER 17

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        FUTURE

                                                                                                                                                        DEVELOPMENT OF

                                                                                                                                                        THE PROJECT

                                                                                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                                                                                        condition in public places

                                                                                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                        It will provide battery backup for make it portable

                                                                                                                                                        It will also provide SMS system in future

                                                                                                                                                        We can also increase the charging time by editing software of the project

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        CHAPTER 18

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        COST ANALYSIS

                                                                                                                                                        OF THE PROJECT

                                                                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                        1811 Component list for power supply card

                                                                                                                                                        Footprint Quantity Designators Rate

                                                                                                                                                        Resistor

                                                                                                                                                        22K 1 R2 1

                                                                                                                                                        1K 1 R1 1

                                                                                                                                                        Capacitor

                                                                                                                                                        1000uf25V 1 C5 10

                                                                                                                                                        2200uf25V 1 C1 10

                                                                                                                                                        022uf 2 C6 C2 1

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                        Table 1811 Component list for power supply card

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        01uf 2 C4 C3 1

                                                                                                                                                        IC

                                                                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                                                                        Connector

                                                                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                                                                        Heat sink (TO-220) 2 16

                                                                                                                                                        Total 955

                                                                                                                                                        1812 Component list for battery charger card

                                                                                                                                                        Footprint Quantity Rate

                                                                                                                                                        Capacitor

                                                                                                                                                        2200uf25V 1 1000

                                                                                                                                                        022uf 4 100

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        01uf 4 100

                                                                                                                                                        IC

                                                                                                                                                        BRIDGE W10 1 500

                                                                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                                                                        Connector

                                                                                                                                                        CON PHO 2PIN 1 800

                                                                                                                                                        Relimate 2 pin 1 400

                                                                                                                                                        relimate 3 pin 4 2000

                                                                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                                                                        TOTAL 9300

                                                                                                                                                        1813 Component list for Relay card

                                                                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                        Table 1812Component list for battery charger card

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                        Total 18900

                                                                                                                                                        1814Component list for controller card

                                                                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                        Table 1813Component list for relay card

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                        total 27000

                                                                                                                                                        1815 Miscellaneous material

                                                                                                                                                        Material Quantity Rate

                                                                                                                                                        electronic item

                                                                                                                                                        Transformer

                                                                                                                                                        TXR1 0-9-15 1 20000

                                                                                                                                                        0-9 1A

                                                                                                                                                        0-15 100mA

                                                                                                                                                        TXR2 0-9 1 16500

                                                                                                                                                        0-9 1A

                                                                                                                                                        Proximity switch 1 20000

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                        Table 1814Component list for microcontroller card

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Red push bottom 4 4000

                                                                                                                                                        Green push button 1 1000

                                                                                                                                                        Red led 5mm 4 800

                                                                                                                                                        Green led 5mm 4 800

                                                                                                                                                        Led holder 8 1600

                                                                                                                                                        Copper clad 2 4000

                                                                                                                                                        3 core cable 1 meter 1500

                                                                                                                                                        3 pin plug 1 3000

                                                                                                                                                        2 pin relimate wire 19 9000

                                                                                                                                                        3 pin relimate wire 5 3750

                                                                                                                                                        4 pin relimate wire 2 2000

                                                                                                                                                        mechanical items

                                                                                                                                                        Enclosure 1 25000

                                                                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                                                                        12mm cable gland 1 1000

                                                                                                                                                        Screw 3mm 33 2000

                                                                                                                                                        Screw 35mm 6 2400

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        10 mm spacers 100 1500

                                                                                                                                                        10mm insert to stud 50 10000

                                                                                                                                                        cable tie 2500

                                                                                                                                                        Total 162350

                                                                                                                                                        CHAPTER 19

                                                                                                                                                        APPENDIX

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        APPENDIX

                                                                                                                                                        191 APPENDIX

                                                                                                                                                        1911 78xx IC datasheet

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        1912 W10 datasheet

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        1913 4n33 IC datasheet

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                        1914 MAX 232

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        CHAPTER 20

                                                                                                                                                        CONCLUSION

                                                                                                                                                        CONCLUSION

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        201 CONCLUSION

                                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                        installed in any business premises

                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        CHAPTER 21

                                                                                                                                                        IMAGES OF THE

                                                                                                                                                        PROJECT

                                                                                                                                                        Images of the project

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        CHAPTER 22

                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                        BOOKS

                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                        INTERNET LINKS

                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                        • CHAPTER 1

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          elseflag5=0 flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                          flag9=1

                                                                                                                                                          elseflag9=0flag3=0REady_LED3=0 if(flag11==1)

                                                                                                                                                          flag11=1

                                                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                          IF SWITCH 3 IS PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                          if(sw3_op==0 ) ready switch flag for system3 my_delay(10)

                                                                                                                                                          flag3=1 disp3=1 k3=0 if(k2==0||k1==0||k4==0)

                                                                                                                                                          if(flag7==1)

                                                                                                                                                          flag7=1

                                                                                                                                                          else

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 77

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                          flag5=1

                                                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                          flag11=1

                                                                                                                                                          elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                          IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                          if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                          if(flag7==1)

                                                                                                                                                          flag7=1

                                                                                                                                                          elseflag7=0

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                          flag5=1

                                                                                                                                                          elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                          flag9=1

                                                                                                                                                          elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                          IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                          if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                          if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                          IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                          if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                          if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                          if(flag6==1)

                                                                                                                                                          i++ if (igt1000) ii++

                                                                                                                                                          if (flag8==1)

                                                                                                                                                          j++ if(jgt1000) jj++

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          if (flag10==1)

                                                                                                                                                          l++ if (lgt1000) ll++

                                                                                                                                                          if (flag12==1)

                                                                                                                                                          m++ if (mgt1000) mm++

                                                                                                                                                          DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          CHAPTER 13

                                                                                                                                                          TROUBLE SHOOT

                                                                                                                                                          Troubleshoot

                                                                                                                                                          131 TROUBLE SHOOT

                                                                                                                                                          A newly assembled circuit does not work may be due to -

                                                                                                                                                          Faulty components

                                                                                                                                                          Improper soldering

                                                                                                                                                          Wrong connections

                                                                                                                                                          Also any stop in working after some period may be due to -

                                                                                                                                                          Component failure

                                                                                                                                                          Supply failure

                                                                                                                                                          Damaging of PCB

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                          If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                          circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                          polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                          circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                          proper soldering

                                                                                                                                                          If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                          test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                          Resistance measurement is also done which is known as Dry test

                                                                                                                                                          During this project work some green LEDs was not glow then we checked it

                                                                                                                                                          continuity and replace it

                                                                                                                                                          Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                          heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                          during soldering PCB We solved that problem

                                                                                                                                                          CHAPTER 14

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          ADVANTAGES OF

                                                                                                                                                          THE PROJECT

                                                                                                                                                          Advantages

                                                                                                                                                          141 ADVANTAGES OF THE PROJECT

                                                                                                                                                          Simple and hand efficient Microcontroller based system

                                                                                                                                                          Fast charging capacity

                                                                                                                                                          Simple to operate

                                                                                                                                                          Ease of mobility

                                                                                                                                                          Facilitates connectivity for 90 of cellular phones

                                                                                                                                                          Less expensive

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Reduced man power

                                                                                                                                                          Low power consumption

                                                                                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                          CHAPTER 15

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          DISADVANTAGES

                                                                                                                                                          OF THE PROJECT

                                                                                                                                                          Disadvantages

                                                                                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                          It requires mains supply to work project

                                                                                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                          min

                                                                                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                                                                                          CHAPTER 16

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          APPLICATIONS OF

                                                                                                                                                          THE PROJECT

                                                                                                                                                          Application

                                                                                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                          charge for the mobile phone in any places

                                                                                                                                                          It is used for emergency charging purposes

                                                                                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                                                                                          places

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                          any location where there is a high footfall creating a large number of

                                                                                                                                                          potential users

                                                                                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                                                                                          CHAPTER 17

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          FUTURE

                                                                                                                                                          DEVELOPMENT OF

                                                                                                                                                          THE PROJECT

                                                                                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                                                                                          condition in public places

                                                                                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                          It will provide battery backup for make it portable

                                                                                                                                                          It will also provide SMS system in future

                                                                                                                                                          We can also increase the charging time by editing software of the project

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          CHAPTER 18

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          COST ANALYSIS

                                                                                                                                                          OF THE PROJECT

                                                                                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                          1811 Component list for power supply card

                                                                                                                                                          Footprint Quantity Designators Rate

                                                                                                                                                          Resistor

                                                                                                                                                          22K 1 R2 1

                                                                                                                                                          1K 1 R1 1

                                                                                                                                                          Capacitor

                                                                                                                                                          1000uf25V 1 C5 10

                                                                                                                                                          2200uf25V 1 C1 10

                                                                                                                                                          022uf 2 C6 C2 1

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                          Table 1811 Component list for power supply card

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          01uf 2 C4 C3 1

                                                                                                                                                          IC

                                                                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                                                                          Connector

                                                                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                                                                          Heat sink (TO-220) 2 16

                                                                                                                                                          Total 955

                                                                                                                                                          1812 Component list for battery charger card

                                                                                                                                                          Footprint Quantity Rate

                                                                                                                                                          Capacitor

                                                                                                                                                          2200uf25V 1 1000

                                                                                                                                                          022uf 4 100

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          01uf 4 100

                                                                                                                                                          IC

                                                                                                                                                          BRIDGE W10 1 500

                                                                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                                                                          Connector

                                                                                                                                                          CON PHO 2PIN 1 800

                                                                                                                                                          Relimate 2 pin 1 400

                                                                                                                                                          relimate 3 pin 4 2000

                                                                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                                                                          TOTAL 9300

                                                                                                                                                          1813 Component list for Relay card

                                                                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                          Table 1812Component list for battery charger card

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                          Total 18900

                                                                                                                                                          1814Component list for controller card

                                                                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                          Table 1813Component list for relay card

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                          total 27000

                                                                                                                                                          1815 Miscellaneous material

                                                                                                                                                          Material Quantity Rate

                                                                                                                                                          electronic item

                                                                                                                                                          Transformer

                                                                                                                                                          TXR1 0-9-15 1 20000

                                                                                                                                                          0-9 1A

                                                                                                                                                          0-15 100mA

                                                                                                                                                          TXR2 0-9 1 16500

                                                                                                                                                          0-9 1A

                                                                                                                                                          Proximity switch 1 20000

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                          Table 1814Component list for microcontroller card

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Red push bottom 4 4000

                                                                                                                                                          Green push button 1 1000

                                                                                                                                                          Red led 5mm 4 800

                                                                                                                                                          Green led 5mm 4 800

                                                                                                                                                          Led holder 8 1600

                                                                                                                                                          Copper clad 2 4000

                                                                                                                                                          3 core cable 1 meter 1500

                                                                                                                                                          3 pin plug 1 3000

                                                                                                                                                          2 pin relimate wire 19 9000

                                                                                                                                                          3 pin relimate wire 5 3750

                                                                                                                                                          4 pin relimate wire 2 2000

                                                                                                                                                          mechanical items

                                                                                                                                                          Enclosure 1 25000

                                                                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                                                                          12mm cable gland 1 1000

                                                                                                                                                          Screw 3mm 33 2000

                                                                                                                                                          Screw 35mm 6 2400

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          10 mm spacers 100 1500

                                                                                                                                                          10mm insert to stud 50 10000

                                                                                                                                                          cable tie 2500

                                                                                                                                                          Total 162350

                                                                                                                                                          CHAPTER 19

                                                                                                                                                          APPENDIX

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          APPENDIX

                                                                                                                                                          191 APPENDIX

                                                                                                                                                          1911 78xx IC datasheet

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          1912 W10 datasheet

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          1913 4n33 IC datasheet

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                          1914 MAX 232

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          CHAPTER 20

                                                                                                                                                          CONCLUSION

                                                                                                                                                          CONCLUSION

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          201 CONCLUSION

                                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                          installed in any business premises

                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          CHAPTER 21

                                                                                                                                                          IMAGES OF THE

                                                                                                                                                          PROJECT

                                                                                                                                                          Images of the project

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          CHAPTER 22

                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                          BOOKS

                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                          INTERNET LINKS

                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                          • CHAPTER 1

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            flag7=0flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                            flag5=1

                                                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag11==1)

                                                                                                                                                            flag11=1

                                                                                                                                                            elseflag11=0flag4=0REady_LED4=0

                                                                                                                                                            IF SWITCH 4 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                            if(sw4_op==0 ) ready switch flag for system4 my_delay(10) flag4=1 disp4=1 k4=0 if(k2==0||k1==0||k3==0)

                                                                                                                                                            if(flag7==1)

                                                                                                                                                            flag7=1

                                                                                                                                                            elseflag7=0

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 78

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                            flag5=1

                                                                                                                                                            elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                            flag9=1

                                                                                                                                                            elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                            IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                            if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                            if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                            IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                            if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                            if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                            if(flag6==1)

                                                                                                                                                            i++ if (igt1000) ii++

                                                                                                                                                            if (flag8==1)

                                                                                                                                                            j++ if(jgt1000) jj++

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            if (flag10==1)

                                                                                                                                                            l++ if (lgt1000) ll++

                                                                                                                                                            if (flag12==1)

                                                                                                                                                            m++ if (mgt1000) mm++

                                                                                                                                                            DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            CHAPTER 13

                                                                                                                                                            TROUBLE SHOOT

                                                                                                                                                            Troubleshoot

                                                                                                                                                            131 TROUBLE SHOOT

                                                                                                                                                            A newly assembled circuit does not work may be due to -

                                                                                                                                                            Faulty components

                                                                                                                                                            Improper soldering

                                                                                                                                                            Wrong connections

                                                                                                                                                            Also any stop in working after some period may be due to -

                                                                                                                                                            Component failure

                                                                                                                                                            Supply failure

                                                                                                                                                            Damaging of PCB

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                            If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                            circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                            polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                            circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                            proper soldering

                                                                                                                                                            If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                            test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                            Resistance measurement is also done which is known as Dry test

                                                                                                                                                            During this project work some green LEDs was not glow then we checked it

                                                                                                                                                            continuity and replace it

                                                                                                                                                            Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                            heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                            during soldering PCB We solved that problem

                                                                                                                                                            CHAPTER 14

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            ADVANTAGES OF

                                                                                                                                                            THE PROJECT

                                                                                                                                                            Advantages

                                                                                                                                                            141 ADVANTAGES OF THE PROJECT

                                                                                                                                                            Simple and hand efficient Microcontroller based system

                                                                                                                                                            Fast charging capacity

                                                                                                                                                            Simple to operate

                                                                                                                                                            Ease of mobility

                                                                                                                                                            Facilitates connectivity for 90 of cellular phones

                                                                                                                                                            Less expensive

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Reduced man power

                                                                                                                                                            Low power consumption

                                                                                                                                                            It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                            CHAPTER 15

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            DISADVANTAGES

                                                                                                                                                            OF THE PROJECT

                                                                                                                                                            Disadvantages

                                                                                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                            It requires mains supply to work project

                                                                                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                            min

                                                                                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                                                                                            CHAPTER 16

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            APPLICATIONS OF

                                                                                                                                                            THE PROJECT

                                                                                                                                                            Application

                                                                                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                            charge for the mobile phone in any places

                                                                                                                                                            It is used for emergency charging purposes

                                                                                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                                                                                            places

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                            any location where there is a high footfall creating a large number of

                                                                                                                                                            potential users

                                                                                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                                                                                            CHAPTER 17

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            FUTURE

                                                                                                                                                            DEVELOPMENT OF

                                                                                                                                                            THE PROJECT

                                                                                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                                                                                            condition in public places

                                                                                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                            It will provide battery backup for make it portable

                                                                                                                                                            It will also provide SMS system in future

                                                                                                                                                            We can also increase the charging time by editing software of the project

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            CHAPTER 18

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            COST ANALYSIS

                                                                                                                                                            OF THE PROJECT

                                                                                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                            1811 Component list for power supply card

                                                                                                                                                            Footprint Quantity Designators Rate

                                                                                                                                                            Resistor

                                                                                                                                                            22K 1 R2 1

                                                                                                                                                            1K 1 R1 1

                                                                                                                                                            Capacitor

                                                                                                                                                            1000uf25V 1 C5 10

                                                                                                                                                            2200uf25V 1 C1 10

                                                                                                                                                            022uf 2 C6 C2 1

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                            Table 1811 Component list for power supply card

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            01uf 2 C4 C3 1

                                                                                                                                                            IC

                                                                                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                                                                                            Connector

                                                                                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                            CON PHO 3PIN 1 J1 12

                                                                                                                                                            LED3mm red 2 L1 L2 15

                                                                                                                                                            Heat sink (TO-220) 2 16

                                                                                                                                                            Total 955

                                                                                                                                                            1812 Component list for battery charger card

                                                                                                                                                            Footprint Quantity Rate

                                                                                                                                                            Capacitor

                                                                                                                                                            2200uf25V 1 1000

                                                                                                                                                            022uf 4 100

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            01uf 4 100

                                                                                                                                                            IC

                                                                                                                                                            BRIDGE W10 1 500

                                                                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                                                                            Connector

                                                                                                                                                            CON PHO 2PIN 1 800

                                                                                                                                                            Relimate 2 pin 1 400

                                                                                                                                                            relimate 3 pin 4 2000

                                                                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                                                                            TOTAL 9300

                                                                                                                                                            1813 Component list for Relay card

                                                                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                            Table 1812Component list for battery charger card

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                            Total 18900

                                                                                                                                                            1814Component list for controller card

                                                                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                            Table 1813Component list for relay card

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                            total 27000

                                                                                                                                                            1815 Miscellaneous material

                                                                                                                                                            Material Quantity Rate

                                                                                                                                                            electronic item

                                                                                                                                                            Transformer

                                                                                                                                                            TXR1 0-9-15 1 20000

                                                                                                                                                            0-9 1A

                                                                                                                                                            0-15 100mA

                                                                                                                                                            TXR2 0-9 1 16500

                                                                                                                                                            0-9 1A

                                                                                                                                                            Proximity switch 1 20000

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                            Table 1814Component list for microcontroller card

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Red push bottom 4 4000

                                                                                                                                                            Green push button 1 1000

                                                                                                                                                            Red led 5mm 4 800

                                                                                                                                                            Green led 5mm 4 800

                                                                                                                                                            Led holder 8 1600

                                                                                                                                                            Copper clad 2 4000

                                                                                                                                                            3 core cable 1 meter 1500

                                                                                                                                                            3 pin plug 1 3000

                                                                                                                                                            2 pin relimate wire 19 9000

                                                                                                                                                            3 pin relimate wire 5 3750

                                                                                                                                                            4 pin relimate wire 2 2000

                                                                                                                                                            mechanical items

                                                                                                                                                            Enclosure 1 25000

                                                                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                                                                            12mm cable gland 1 1000

                                                                                                                                                            Screw 3mm 33 2000

                                                                                                                                                            Screw 35mm 6 2400

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            10 mm spacers 100 1500

                                                                                                                                                            10mm insert to stud 50 10000

                                                                                                                                                            cable tie 2500

                                                                                                                                                            Total 162350

                                                                                                                                                            CHAPTER 19

                                                                                                                                                            APPENDIX

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            APPENDIX

                                                                                                                                                            191 APPENDIX

                                                                                                                                                            1911 78xx IC datasheet

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            1912 W10 datasheet

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            1913 4n33 IC datasheet

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                            1914 MAX 232

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            CHAPTER 20

                                                                                                                                                            CONCLUSION

                                                                                                                                                            CONCLUSION

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            201 CONCLUSION

                                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                            installed in any business premises

                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            CHAPTER 21

                                                                                                                                                            IMAGES OF THE

                                                                                                                                                            PROJECT

                                                                                                                                                            Images of the project

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            CHAPTER 22

                                                                                                                                                            BIBILOGRAPHY

                                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                            BOOKS

                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                            INTERNET LINKS

                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                            • CHAPTER 1

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              flag2=0REady_LED2=0 if(flag5==1)

                                                                                                                                                              flag5=1

                                                                                                                                                              elseflag5=0flag1=0REady_LED1=0 if(flag9==1)

                                                                                                                                                              flag9=1

                                                                                                                                                              elseflag9=0flag3=0REady_LED3=0

                                                                                                                                                              IF SWITCH 5 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                              if (sw5_op==0 ) coin check my_delay (10) if (flag1==1) flag5=1 disp5=1

                                                                                                                                                              if(flag2==1 ) flag7=1 disp5=1 if(flag3==1 ) flag9=1

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 79

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                              IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                              if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                              if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                              if(flag6==1)

                                                                                                                                                              i++ if (igt1000) ii++

                                                                                                                                                              if (flag8==1)

                                                                                                                                                              j++ if(jgt1000) jj++

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              if (flag10==1)

                                                                                                                                                              l++ if (lgt1000) ll++

                                                                                                                                                              if (flag12==1)

                                                                                                                                                              m++ if (mgt1000) mm++

                                                                                                                                                              DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              CHAPTER 13

                                                                                                                                                              TROUBLE SHOOT

                                                                                                                                                              Troubleshoot

                                                                                                                                                              131 TROUBLE SHOOT

                                                                                                                                                              A newly assembled circuit does not work may be due to -

                                                                                                                                                              Faulty components

                                                                                                                                                              Improper soldering

                                                                                                                                                              Wrong connections

                                                                                                                                                              Also any stop in working after some period may be due to -

                                                                                                                                                              Component failure

                                                                                                                                                              Supply failure

                                                                                                                                                              Damaging of PCB

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                              If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                              circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                              polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                              circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                              proper soldering

                                                                                                                                                              If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                              test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                              Resistance measurement is also done which is known as Dry test

                                                                                                                                                              During this project work some green LEDs was not glow then we checked it

                                                                                                                                                              continuity and replace it

                                                                                                                                                              Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                              heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                              during soldering PCB We solved that problem

                                                                                                                                                              CHAPTER 14

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              ADVANTAGES OF

                                                                                                                                                              THE PROJECT

                                                                                                                                                              Advantages

                                                                                                                                                              141 ADVANTAGES OF THE PROJECT

                                                                                                                                                              Simple and hand efficient Microcontroller based system

                                                                                                                                                              Fast charging capacity

                                                                                                                                                              Simple to operate

                                                                                                                                                              Ease of mobility

                                                                                                                                                              Facilitates connectivity for 90 of cellular phones

                                                                                                                                                              Less expensive

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Reduced man power

                                                                                                                                                              Low power consumption

                                                                                                                                                              It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                              CHAPTER 15

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              DISADVANTAGES

                                                                                                                                                              OF THE PROJECT

                                                                                                                                                              Disadvantages

                                                                                                                                                              151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                              It requires mains supply to work project

                                                                                                                                                              Due to limited charging channels till now there may be a possibility that

                                                                                                                                                              mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                              purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                              min

                                                                                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                                                                                              CHAPTER 16

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              APPLICATIONS OF

                                                                                                                                                              THE PROJECT

                                                                                                                                                              Application

                                                                                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                              charge for the mobile phone in any places

                                                                                                                                                              It is used for emergency charging purposes

                                                                                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                                                                                              places

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                              any location where there is a high footfall creating a large number of

                                                                                                                                                              potential users

                                                                                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                                                                                              CHAPTER 17

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              FUTURE

                                                                                                                                                              DEVELOPMENT OF

                                                                                                                                                              THE PROJECT

                                                                                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                                                                                              condition in public places

                                                                                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                              It will provide battery backup for make it portable

                                                                                                                                                              It will also provide SMS system in future

                                                                                                                                                              We can also increase the charging time by editing software of the project

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              CHAPTER 18

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              COST ANALYSIS

                                                                                                                                                              OF THE PROJECT

                                                                                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                              1811 Component list for power supply card

                                                                                                                                                              Footprint Quantity Designators Rate

                                                                                                                                                              Resistor

                                                                                                                                                              22K 1 R2 1

                                                                                                                                                              1K 1 R1 1

                                                                                                                                                              Capacitor

                                                                                                                                                              1000uf25V 1 C5 10

                                                                                                                                                              2200uf25V 1 C1 10

                                                                                                                                                              022uf 2 C6 C2 1

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                              Table 1811 Component list for power supply card

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              01uf 2 C4 C3 1

                                                                                                                                                              IC

                                                                                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                                                                                              Connector

                                                                                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                              CON PHO 3PIN 1 J1 12

                                                                                                                                                              LED3mm red 2 L1 L2 15

                                                                                                                                                              Heat sink (TO-220) 2 16

                                                                                                                                                              Total 955

                                                                                                                                                              1812 Component list for battery charger card

                                                                                                                                                              Footprint Quantity Rate

                                                                                                                                                              Capacitor

                                                                                                                                                              2200uf25V 1 1000

                                                                                                                                                              022uf 4 100

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              01uf 4 100

                                                                                                                                                              IC

                                                                                                                                                              BRIDGE W10 1 500

                                                                                                                                                              L7805CV (TO-220) 4 3200

                                                                                                                                                              Connector

                                                                                                                                                              CON PHO 2PIN 1 800

                                                                                                                                                              Relimate 2 pin 1 400

                                                                                                                                                              relimate 3 pin 4 2000

                                                                                                                                                              Heat sink (TO-220) 4 1200

                                                                                                                                                              TOTAL 9300

                                                                                                                                                              1813 Component list for Relay card

                                                                                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                              Table 1812Component list for battery charger card

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                              Total 18900

                                                                                                                                                              1814Component list for controller card

                                                                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                              Table 1813Component list for relay card

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                              total 27000

                                                                                                                                                              1815 Miscellaneous material

                                                                                                                                                              Material Quantity Rate

                                                                                                                                                              electronic item

                                                                                                                                                              Transformer

                                                                                                                                                              TXR1 0-9-15 1 20000

                                                                                                                                                              0-9 1A

                                                                                                                                                              0-15 100mA

                                                                                                                                                              TXR2 0-9 1 16500

                                                                                                                                                              0-9 1A

                                                                                                                                                              Proximity switch 1 20000

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                              Table 1814Component list for microcontroller card

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Red push bottom 4 4000

                                                                                                                                                              Green push button 1 1000

                                                                                                                                                              Red led 5mm 4 800

                                                                                                                                                              Green led 5mm 4 800

                                                                                                                                                              Led holder 8 1600

                                                                                                                                                              Copper clad 2 4000

                                                                                                                                                              3 core cable 1 meter 1500

                                                                                                                                                              3 pin plug 1 3000

                                                                                                                                                              2 pin relimate wire 19 9000

                                                                                                                                                              3 pin relimate wire 5 3750

                                                                                                                                                              4 pin relimate wire 2 2000

                                                                                                                                                              mechanical items

                                                                                                                                                              Enclosure 1 25000

                                                                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                                                                              12mm cable gland 1 1000

                                                                                                                                                              Screw 3mm 33 2000

                                                                                                                                                              Screw 35mm 6 2400

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              10 mm spacers 100 1500

                                                                                                                                                              10mm insert to stud 50 10000

                                                                                                                                                              cable tie 2500

                                                                                                                                                              Total 162350

                                                                                                                                                              CHAPTER 19

                                                                                                                                                              APPENDIX

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              APPENDIX

                                                                                                                                                              191 APPENDIX

                                                                                                                                                              1911 78xx IC datasheet

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              1912 W10 datasheet

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              1913 4n33 IC datasheet

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                              1914 MAX 232

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              CHAPTER 20

                                                                                                                                                              CONCLUSION

                                                                                                                                                              CONCLUSION

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              201 CONCLUSION

                                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                              installed in any business premises

                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              CHAPTER 21

                                                                                                                                                              IMAGES OF THE

                                                                                                                                                              PROJECT

                                                                                                                                                              Images of the project

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              CHAPTER 22

                                                                                                                                                              BIBILOGRAPHY

                                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                                              BOOKS

                                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                              INTERNET LINKS

                                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                              • CHAPTER 1

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                disp5=1 if(flag4==1 ) flag11=1 disp5=1

                                                                                                                                                                IF SWITCH 6 IES PRESSEDE THEN IT WILL GO N TO FOLLOWING LOOP

                                                                                                                                                                if(sw6_op==0 ) start signal my_delay (10) if((flag1==1 ampamp flag5==1)) flag6=1 disp6=1 if((flag2==1 ampamp flag7==1)) flag8=1 disp6=1

                                                                                                                                                                if((flag3==1 ampamp flag9==1)) flag10=1 disp6=1 if((flag4==1 ampamp flag11==1)) flag12=1 disp6=1

                                                                                                                                                                if(flag6==1)

                                                                                                                                                                i++ if (igt1000) ii++

                                                                                                                                                                if (flag8==1)

                                                                                                                                                                j++ if(jgt1000) jj++

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 80

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                if (flag10==1)

                                                                                                                                                                l++ if (lgt1000) ll++

                                                                                                                                                                if (flag12==1)

                                                                                                                                                                m++ if (mgt1000) mm++

                                                                                                                                                                DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                CHAPTER 13

                                                                                                                                                                TROUBLE SHOOT

                                                                                                                                                                Troubleshoot

                                                                                                                                                                131 TROUBLE SHOOT

                                                                                                                                                                A newly assembled circuit does not work may be due to -

                                                                                                                                                                Faulty components

                                                                                                                                                                Improper soldering

                                                                                                                                                                Wrong connections

                                                                                                                                                                Also any stop in working after some period may be due to -

                                                                                                                                                                Component failure

                                                                                                                                                                Supply failure

                                                                                                                                                                Damaging of PCB

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                                If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                                circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                                polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                                circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                                proper soldering

                                                                                                                                                                If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                                test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                                Resistance measurement is also done which is known as Dry test

                                                                                                                                                                During this project work some green LEDs was not glow then we checked it

                                                                                                                                                                continuity and replace it

                                                                                                                                                                Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                                heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                                during soldering PCB We solved that problem

                                                                                                                                                                CHAPTER 14

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                ADVANTAGES OF

                                                                                                                                                                THE PROJECT

                                                                                                                                                                Advantages

                                                                                                                                                                141 ADVANTAGES OF THE PROJECT

                                                                                                                                                                Simple and hand efficient Microcontroller based system

                                                                                                                                                                Fast charging capacity

                                                                                                                                                                Simple to operate

                                                                                                                                                                Ease of mobility

                                                                                                                                                                Facilitates connectivity for 90 of cellular phones

                                                                                                                                                                Less expensive

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Reduced man power

                                                                                                                                                                Low power consumption

                                                                                                                                                                It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                CHAPTER 15

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                DISADVANTAGES

                                                                                                                                                                OF THE PROJECT

                                                                                                                                                                Disadvantages

                                                                                                                                                                151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                It requires mains supply to work project

                                                                                                                                                                Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                min

                                                                                                                                                                It does not have battery backup therefore it cannot be portable

                                                                                                                                                                CHAPTER 16

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                APPLICATIONS OF

                                                                                                                                                                THE PROJECT

                                                                                                                                                                Application

                                                                                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                charge for the mobile phone in any places

                                                                                                                                                                It is used for emergency charging purposes

                                                                                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                places

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                any location where there is a high footfall creating a large number of

                                                                                                                                                                potential users

                                                                                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                                                                                CHAPTER 17

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                FUTURE

                                                                                                                                                                DEVELOPMENT OF

                                                                                                                                                                THE PROJECT

                                                                                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                condition in public places

                                                                                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                It will provide battery backup for make it portable

                                                                                                                                                                It will also provide SMS system in future

                                                                                                                                                                We can also increase the charging time by editing software of the project

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                CHAPTER 18

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                COST ANALYSIS

                                                                                                                                                                OF THE PROJECT

                                                                                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                1811 Component list for power supply card

                                                                                                                                                                Footprint Quantity Designators Rate

                                                                                                                                                                Resistor

                                                                                                                                                                22K 1 R2 1

                                                                                                                                                                1K 1 R1 1

                                                                                                                                                                Capacitor

                                                                                                                                                                1000uf25V 1 C5 10

                                                                                                                                                                2200uf25V 1 C1 10

                                                                                                                                                                022uf 2 C6 C2 1

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                Table 1811 Component list for power supply card

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                01uf 2 C4 C3 1

                                                                                                                                                                IC

                                                                                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                                                                                Connector

                                                                                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                                                                                LED3mm red 2 L1 L2 15

                                                                                                                                                                Heat sink (TO-220) 2 16

                                                                                                                                                                Total 955

                                                                                                                                                                1812 Component list for battery charger card

                                                                                                                                                                Footprint Quantity Rate

                                                                                                                                                                Capacitor

                                                                                                                                                                2200uf25V 1 1000

                                                                                                                                                                022uf 4 100

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                01uf 4 100

                                                                                                                                                                IC

                                                                                                                                                                BRIDGE W10 1 500

                                                                                                                                                                L7805CV (TO-220) 4 3200

                                                                                                                                                                Connector

                                                                                                                                                                CON PHO 2PIN 1 800

                                                                                                                                                                Relimate 2 pin 1 400

                                                                                                                                                                relimate 3 pin 4 2000

                                                                                                                                                                Heat sink (TO-220) 4 1200

                                                                                                                                                                TOTAL 9300

                                                                                                                                                                1813 Component list for Relay card

                                                                                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                Table 1812Component list for battery charger card

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                Total 18900

                                                                                                                                                                1814Component list for controller card

                                                                                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                Table 1813Component list for relay card

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                total 27000

                                                                                                                                                                1815 Miscellaneous material

                                                                                                                                                                Material Quantity Rate

                                                                                                                                                                electronic item

                                                                                                                                                                Transformer

                                                                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                                                                0-9 1A

                                                                                                                                                                0-15 100mA

                                                                                                                                                                TXR2 0-9 1 16500

                                                                                                                                                                0-9 1A

                                                                                                                                                                Proximity switch 1 20000

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Red push bottom 4 4000

                                                                                                                                                                Green push button 1 1000

                                                                                                                                                                Red led 5mm 4 800

                                                                                                                                                                Green led 5mm 4 800

                                                                                                                                                                Led holder 8 1600

                                                                                                                                                                Copper clad 2 4000

                                                                                                                                                                3 core cable 1 meter 1500

                                                                                                                                                                3 pin plug 1 3000

                                                                                                                                                                2 pin relimate wire 19 9000

                                                                                                                                                                3 pin relimate wire 5 3750

                                                                                                                                                                4 pin relimate wire 2 2000

                                                                                                                                                                mechanical items

                                                                                                                                                                Enclosure 1 25000

                                                                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                                                                12mm cable gland 1 1000

                                                                                                                                                                Screw 3mm 33 2000

                                                                                                                                                                Screw 35mm 6 2400

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                10 mm spacers 100 1500

                                                                                                                                                                10mm insert to stud 50 10000

                                                                                                                                                                cable tie 2500

                                                                                                                                                                Total 162350

                                                                                                                                                                CHAPTER 19

                                                                                                                                                                APPENDIX

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                APPENDIX

                                                                                                                                                                191 APPENDIX

                                                                                                                                                                1911 78xx IC datasheet

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                1912 W10 datasheet

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                1913 4n33 IC datasheet

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                1914 MAX 232

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                CHAPTER 20

                                                                                                                                                                CONCLUSION

                                                                                                                                                                CONCLUSION

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                201 CONCLUSION

                                                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                installed in any business premises

                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                CHAPTER 21

                                                                                                                                                                IMAGES OF THE

                                                                                                                                                                PROJECT

                                                                                                                                                                Images of the project

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                CHAPTER 22

                                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                                BOOKS

                                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                INTERNET LINKS

                                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                • CHAPTER 1

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  if (flag10==1)

                                                                                                                                                                  l++ if (lgt1000) ll++

                                                                                                                                                                  if (flag12==1)

                                                                                                                                                                  m++ if (mgt1000) mm++

                                                                                                                                                                  DELAY FUNCTIONvoid my_delay(unsigned int value) unsigned int x y for(x=0xlt1000x++) for(y=0yltvalue y++)

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 81

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  CHAPTER 13

                                                                                                                                                                  TROUBLE SHOOT

                                                                                                                                                                  Troubleshoot

                                                                                                                                                                  131 TROUBLE SHOOT

                                                                                                                                                                  A newly assembled circuit does not work may be due to -

                                                                                                                                                                  Faulty components

                                                                                                                                                                  Improper soldering

                                                                                                                                                                  Wrong connections

                                                                                                                                                                  Also any stop in working after some period may be due to -

                                                                                                                                                                  Component failure

                                                                                                                                                                  Supply failure

                                                                                                                                                                  Damaging of PCB

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                                  If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                                  circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                                  polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                                  circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                                  proper soldering

                                                                                                                                                                  If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                                  test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                                  Resistance measurement is also done which is known as Dry test

                                                                                                                                                                  During this project work some green LEDs was not glow then we checked it

                                                                                                                                                                  continuity and replace it

                                                                                                                                                                  Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                                  heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                                  during soldering PCB We solved that problem

                                                                                                                                                                  CHAPTER 14

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  ADVANTAGES OF

                                                                                                                                                                  THE PROJECT

                                                                                                                                                                  Advantages

                                                                                                                                                                  141 ADVANTAGES OF THE PROJECT

                                                                                                                                                                  Simple and hand efficient Microcontroller based system

                                                                                                                                                                  Fast charging capacity

                                                                                                                                                                  Simple to operate

                                                                                                                                                                  Ease of mobility

                                                                                                                                                                  Facilitates connectivity for 90 of cellular phones

                                                                                                                                                                  Less expensive

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Reduced man power

                                                                                                                                                                  Low power consumption

                                                                                                                                                                  It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                  CHAPTER 15

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  DISADVANTAGES

                                                                                                                                                                  OF THE PROJECT

                                                                                                                                                                  Disadvantages

                                                                                                                                                                  151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                  It requires mains supply to work project

                                                                                                                                                                  Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                  mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                  purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                  min

                                                                                                                                                                  It does not have battery backup therefore it cannot be portable

                                                                                                                                                                  CHAPTER 16

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  APPLICATIONS OF

                                                                                                                                                                  THE PROJECT

                                                                                                                                                                  Application

                                                                                                                                                                  161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                  The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                  charge for the mobile phone in any places

                                                                                                                                                                  It is used for emergency charging purposes

                                                                                                                                                                  It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                  places

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                                                                                  potential users

                                                                                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                                                                                  CHAPTER 17

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  FUTURE

                                                                                                                                                                  DEVELOPMENT OF

                                                                                                                                                                  THE PROJECT

                                                                                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                  condition in public places

                                                                                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                  It will provide battery backup for make it portable

                                                                                                                                                                  It will also provide SMS system in future

                                                                                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  CHAPTER 18

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  COST ANALYSIS

                                                                                                                                                                  OF THE PROJECT

                                                                                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                  1811 Component list for power supply card

                                                                                                                                                                  Footprint Quantity Designators Rate

                                                                                                                                                                  Resistor

                                                                                                                                                                  22K 1 R2 1

                                                                                                                                                                  1K 1 R1 1

                                                                                                                                                                  Capacitor

                                                                                                                                                                  1000uf25V 1 C5 10

                                                                                                                                                                  2200uf25V 1 C1 10

                                                                                                                                                                  022uf 2 C6 C2 1

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                  Table 1811 Component list for power supply card

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  01uf 2 C4 C3 1

                                                                                                                                                                  IC

                                                                                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                                                                                  Connector

                                                                                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                                                                                  Heat sink (TO-220) 2 16

                                                                                                                                                                  Total 955

                                                                                                                                                                  1812 Component list for battery charger card

                                                                                                                                                                  Footprint Quantity Rate

                                                                                                                                                                  Capacitor

                                                                                                                                                                  2200uf25V 1 1000

                                                                                                                                                                  022uf 4 100

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  01uf 4 100

                                                                                                                                                                  IC

                                                                                                                                                                  BRIDGE W10 1 500

                                                                                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                                                                                  Connector

                                                                                                                                                                  CON PHO 2PIN 1 800

                                                                                                                                                                  Relimate 2 pin 1 400

                                                                                                                                                                  relimate 3 pin 4 2000

                                                                                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                                                                                  TOTAL 9300

                                                                                                                                                                  1813 Component list for Relay card

                                                                                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                  Table 1812Component list for battery charger card

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                  Total 18900

                                                                                                                                                                  1814Component list for controller card

                                                                                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                  Table 1813Component list for relay card

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                  total 27000

                                                                                                                                                                  1815 Miscellaneous material

                                                                                                                                                                  Material Quantity Rate

                                                                                                                                                                  electronic item

                                                                                                                                                                  Transformer

                                                                                                                                                                  TXR1 0-9-15 1 20000

                                                                                                                                                                  0-9 1A

                                                                                                                                                                  0-15 100mA

                                                                                                                                                                  TXR2 0-9 1 16500

                                                                                                                                                                  0-9 1A

                                                                                                                                                                  Proximity switch 1 20000

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                  Table 1814Component list for microcontroller card

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Red push bottom 4 4000

                                                                                                                                                                  Green push button 1 1000

                                                                                                                                                                  Red led 5mm 4 800

                                                                                                                                                                  Green led 5mm 4 800

                                                                                                                                                                  Led holder 8 1600

                                                                                                                                                                  Copper clad 2 4000

                                                                                                                                                                  3 core cable 1 meter 1500

                                                                                                                                                                  3 pin plug 1 3000

                                                                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                                                                  mechanical items

                                                                                                                                                                  Enclosure 1 25000

                                                                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                                                                  12mm cable gland 1 1000

                                                                                                                                                                  Screw 3mm 33 2000

                                                                                                                                                                  Screw 35mm 6 2400

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  10 mm spacers 100 1500

                                                                                                                                                                  10mm insert to stud 50 10000

                                                                                                                                                                  cable tie 2500

                                                                                                                                                                  Total 162350

                                                                                                                                                                  CHAPTER 19

                                                                                                                                                                  APPENDIX

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  APPENDIX

                                                                                                                                                                  191 APPENDIX

                                                                                                                                                                  1911 78xx IC datasheet

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  1912 W10 datasheet

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  1913 4n33 IC datasheet

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                  1914 MAX 232

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  CHAPTER 20

                                                                                                                                                                  CONCLUSION

                                                                                                                                                                  CONCLUSION

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  201 CONCLUSION

                                                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                  installed in any business premises

                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  CHAPTER 21

                                                                                                                                                                  IMAGES OF THE

                                                                                                                                                                  PROJECT

                                                                                                                                                                  Images of the project

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  CHAPTER 22

                                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                                  BOOKS

                                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                  INTERNET LINKS

                                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                  • CHAPTER 1

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    CHAPTER 13

                                                                                                                                                                    TROUBLE SHOOT

                                                                                                                                                                    Troubleshoot

                                                                                                                                                                    131 TROUBLE SHOOT

                                                                                                                                                                    A newly assembled circuit does not work may be due to -

                                                                                                                                                                    Faulty components

                                                                                                                                                                    Improper soldering

                                                                                                                                                                    Wrong connections

                                                                                                                                                                    Also any stop in working after some period may be due to -

                                                                                                                                                                    Component failure

                                                                                                                                                                    Supply failure

                                                                                                                                                                    Damaging of PCB

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 82

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                                    If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                                    circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                                    polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                                    circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                                    proper soldering

                                                                                                                                                                    If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                                    test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                                    Resistance measurement is also done which is known as Dry test

                                                                                                                                                                    During this project work some green LEDs was not glow then we checked it

                                                                                                                                                                    continuity and replace it

                                                                                                                                                                    Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                                    heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                                    during soldering PCB We solved that problem

                                                                                                                                                                    CHAPTER 14

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    ADVANTAGES OF

                                                                                                                                                                    THE PROJECT

                                                                                                                                                                    Advantages

                                                                                                                                                                    141 ADVANTAGES OF THE PROJECT

                                                                                                                                                                    Simple and hand efficient Microcontroller based system

                                                                                                                                                                    Fast charging capacity

                                                                                                                                                                    Simple to operate

                                                                                                                                                                    Ease of mobility

                                                                                                                                                                    Facilitates connectivity for 90 of cellular phones

                                                                                                                                                                    Less expensive

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Reduced man power

                                                                                                                                                                    Low power consumption

                                                                                                                                                                    It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                    CHAPTER 15

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    DISADVANTAGES

                                                                                                                                                                    OF THE PROJECT

                                                                                                                                                                    Disadvantages

                                                                                                                                                                    151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                    It requires mains supply to work project

                                                                                                                                                                    Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                    mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                    purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                    min

                                                                                                                                                                    It does not have battery backup therefore it cannot be portable

                                                                                                                                                                    CHAPTER 16

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    APPLICATIONS OF

                                                                                                                                                                    THE PROJECT

                                                                                                                                                                    Application

                                                                                                                                                                    161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                    The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                    charge for the mobile phone in any places

                                                                                                                                                                    It is used for emergency charging purposes

                                                                                                                                                                    It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                    places

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                    businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                    any location where there is a high footfall creating a large number of

                                                                                                                                                                    potential users

                                                                                                                                                                    It can be installed in offices and collages for pay charging facility

                                                                                                                                                                    CHAPTER 17

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    FUTURE

                                                                                                                                                                    DEVELOPMENT OF

                                                                                                                                                                    THE PROJECT

                                                                                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                    condition in public places

                                                                                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                    It will provide battery backup for make it portable

                                                                                                                                                                    It will also provide SMS system in future

                                                                                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    CHAPTER 18

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    COST ANALYSIS

                                                                                                                                                                    OF THE PROJECT

                                                                                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                    1811 Component list for power supply card

                                                                                                                                                                    Footprint Quantity Designators Rate

                                                                                                                                                                    Resistor

                                                                                                                                                                    22K 1 R2 1

                                                                                                                                                                    1K 1 R1 1

                                                                                                                                                                    Capacitor

                                                                                                                                                                    1000uf25V 1 C5 10

                                                                                                                                                                    2200uf25V 1 C1 10

                                                                                                                                                                    022uf 2 C6 C2 1

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                    Table 1811 Component list for power supply card

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    01uf 2 C4 C3 1

                                                                                                                                                                    IC

                                                                                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                                                                                    Connector

                                                                                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                                                                                    Heat sink (TO-220) 2 16

                                                                                                                                                                    Total 955

                                                                                                                                                                    1812 Component list for battery charger card

                                                                                                                                                                    Footprint Quantity Rate

                                                                                                                                                                    Capacitor

                                                                                                                                                                    2200uf25V 1 1000

                                                                                                                                                                    022uf 4 100

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    01uf 4 100

                                                                                                                                                                    IC

                                                                                                                                                                    BRIDGE W10 1 500

                                                                                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                                                                                    Connector

                                                                                                                                                                    CON PHO 2PIN 1 800

                                                                                                                                                                    Relimate 2 pin 1 400

                                                                                                                                                                    relimate 3 pin 4 2000

                                                                                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                                                                                    TOTAL 9300

                                                                                                                                                                    1813 Component list for Relay card

                                                                                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                    Table 1812Component list for battery charger card

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                    Total 18900

                                                                                                                                                                    1814Component list for controller card

                                                                                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                    Table 1813Component list for relay card

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                    total 27000

                                                                                                                                                                    1815 Miscellaneous material

                                                                                                                                                                    Material Quantity Rate

                                                                                                                                                                    electronic item

                                                                                                                                                                    Transformer

                                                                                                                                                                    TXR1 0-9-15 1 20000

                                                                                                                                                                    0-9 1A

                                                                                                                                                                    0-15 100mA

                                                                                                                                                                    TXR2 0-9 1 16500

                                                                                                                                                                    0-9 1A

                                                                                                                                                                    Proximity switch 1 20000

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                    Table 1814Component list for microcontroller card

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Red push bottom 4 4000

                                                                                                                                                                    Green push button 1 1000

                                                                                                                                                                    Red led 5mm 4 800

                                                                                                                                                                    Green led 5mm 4 800

                                                                                                                                                                    Led holder 8 1600

                                                                                                                                                                    Copper clad 2 4000

                                                                                                                                                                    3 core cable 1 meter 1500

                                                                                                                                                                    3 pin plug 1 3000

                                                                                                                                                                    2 pin relimate wire 19 9000

                                                                                                                                                                    3 pin relimate wire 5 3750

                                                                                                                                                                    4 pin relimate wire 2 2000

                                                                                                                                                                    mechanical items

                                                                                                                                                                    Enclosure 1 25000

                                                                                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                                                                                    12mm cable gland 1 1000

                                                                                                                                                                    Screw 3mm 33 2000

                                                                                                                                                                    Screw 35mm 6 2400

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    10 mm spacers 100 1500

                                                                                                                                                                    10mm insert to stud 50 10000

                                                                                                                                                                    cable tie 2500

                                                                                                                                                                    Total 162350

                                                                                                                                                                    CHAPTER 19

                                                                                                                                                                    APPENDIX

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    APPENDIX

                                                                                                                                                                    191 APPENDIX

                                                                                                                                                                    1911 78xx IC datasheet

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    1912 W10 datasheet

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    1913 4n33 IC datasheet

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                    1914 MAX 232

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    CHAPTER 20

                                                                                                                                                                    CONCLUSION

                                                                                                                                                                    CONCLUSION

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    201 CONCLUSION

                                                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                    installed in any business premises

                                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    CHAPTER 21

                                                                                                                                                                    IMAGES OF THE

                                                                                                                                                                    PROJECT

                                                                                                                                                                    Images of the project

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    CHAPTER 22

                                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                                    BOOKS

                                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                    INTERNET LINKS

                                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                    • CHAPTER 1

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Fault finding is very essential if you want the circuit to operate properly

                                                                                                                                                                      If a newly assembled circuit is not working properly check all the components and

                                                                                                                                                                      circuit connections according to the diagram The circuit may not be working due to wrong

                                                                                                                                                                      polarity of capacitor diode and wrong supply terminal connection Most of the times the

                                                                                                                                                                      circuit does not work due to bad soldering Therefore proper procedure is followed to have

                                                                                                                                                                      proper soldering

                                                                                                                                                                      If faults are not observed during physical observations one should proceed for Hot

                                                                                                                                                                      test ie Voltage measurement at different points for example at Input terminal etc

                                                                                                                                                                      Resistance measurement is also done which is known as Dry test

                                                                                                                                                                      During this project work some green LEDs was not glow then we checked it

                                                                                                                                                                      continuity and replace it

                                                                                                                                                                      Also relay was not properly worked therefore we replaced it Some ICs was get

                                                                                                                                                                      heated after starting the project It happens because of some soldering points are shorted

                                                                                                                                                                      during soldering PCB We solved that problem

                                                                                                                                                                      CHAPTER 14

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 83

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      ADVANTAGES OF

                                                                                                                                                                      THE PROJECT

                                                                                                                                                                      Advantages

                                                                                                                                                                      141 ADVANTAGES OF THE PROJECT

                                                                                                                                                                      Simple and hand efficient Microcontroller based system

                                                                                                                                                                      Fast charging capacity

                                                                                                                                                                      Simple to operate

                                                                                                                                                                      Ease of mobility

                                                                                                                                                                      Facilitates connectivity for 90 of cellular phones

                                                                                                                                                                      Less expensive

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Reduced man power

                                                                                                                                                                      Low power consumption

                                                                                                                                                                      It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                      CHAPTER 15

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      DISADVANTAGES

                                                                                                                                                                      OF THE PROJECT

                                                                                                                                                                      Disadvantages

                                                                                                                                                                      151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                      It requires mains supply to work project

                                                                                                                                                                      Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                      mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                      purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                      min

                                                                                                                                                                      It does not have battery backup therefore it cannot be portable

                                                                                                                                                                      CHAPTER 16

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      APPLICATIONS OF

                                                                                                                                                                      THE PROJECT

                                                                                                                                                                      Application

                                                                                                                                                                      161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                      The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                      charge for the mobile phone in any places

                                                                                                                                                                      It is used for emergency charging purposes

                                                                                                                                                                      It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                      places

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                      businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                      any location where there is a high footfall creating a large number of

                                                                                                                                                                      potential users

                                                                                                                                                                      It can be installed in offices and collages for pay charging facility

                                                                                                                                                                      CHAPTER 17

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      FUTURE

                                                                                                                                                                      DEVELOPMENT OF

                                                                                                                                                                      THE PROJECT

                                                                                                                                                                      FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                      171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                      This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                      condition in public places

                                                                                                                                                                      It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                      It will provide battery backup for make it portable

                                                                                                                                                                      It will also provide SMS system in future

                                                                                                                                                                      We can also increase the charging time by editing software of the project

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      CHAPTER 18

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      COST ANALYSIS

                                                                                                                                                                      OF THE PROJECT

                                                                                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                      1811 Component list for power supply card

                                                                                                                                                                      Footprint Quantity Designators Rate

                                                                                                                                                                      Resistor

                                                                                                                                                                      22K 1 R2 1

                                                                                                                                                                      1K 1 R1 1

                                                                                                                                                                      Capacitor

                                                                                                                                                                      1000uf25V 1 C5 10

                                                                                                                                                                      2200uf25V 1 C1 10

                                                                                                                                                                      022uf 2 C6 C2 1

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                      Table 1811 Component list for power supply card

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      01uf 2 C4 C3 1

                                                                                                                                                                      IC

                                                                                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                                                                                      Connector

                                                                                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                                                                                      Heat sink (TO-220) 2 16

                                                                                                                                                                      Total 955

                                                                                                                                                                      1812 Component list for battery charger card

                                                                                                                                                                      Footprint Quantity Rate

                                                                                                                                                                      Capacitor

                                                                                                                                                                      2200uf25V 1 1000

                                                                                                                                                                      022uf 4 100

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      01uf 4 100

                                                                                                                                                                      IC

                                                                                                                                                                      BRIDGE W10 1 500

                                                                                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                                                                                      Connector

                                                                                                                                                                      CON PHO 2PIN 1 800

                                                                                                                                                                      Relimate 2 pin 1 400

                                                                                                                                                                      relimate 3 pin 4 2000

                                                                                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                                                                                      TOTAL 9300

                                                                                                                                                                      1813 Component list for Relay card

                                                                                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                      Table 1812Component list for battery charger card

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                      Total 18900

                                                                                                                                                                      1814Component list for controller card

                                                                                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                      Table 1813Component list for relay card

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                      total 27000

                                                                                                                                                                      1815 Miscellaneous material

                                                                                                                                                                      Material Quantity Rate

                                                                                                                                                                      electronic item

                                                                                                                                                                      Transformer

                                                                                                                                                                      TXR1 0-9-15 1 20000

                                                                                                                                                                      0-9 1A

                                                                                                                                                                      0-15 100mA

                                                                                                                                                                      TXR2 0-9 1 16500

                                                                                                                                                                      0-9 1A

                                                                                                                                                                      Proximity switch 1 20000

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                      Table 1814Component list for microcontroller card

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Red push bottom 4 4000

                                                                                                                                                                      Green push button 1 1000

                                                                                                                                                                      Red led 5mm 4 800

                                                                                                                                                                      Green led 5mm 4 800

                                                                                                                                                                      Led holder 8 1600

                                                                                                                                                                      Copper clad 2 4000

                                                                                                                                                                      3 core cable 1 meter 1500

                                                                                                                                                                      3 pin plug 1 3000

                                                                                                                                                                      2 pin relimate wire 19 9000

                                                                                                                                                                      3 pin relimate wire 5 3750

                                                                                                                                                                      4 pin relimate wire 2 2000

                                                                                                                                                                      mechanical items

                                                                                                                                                                      Enclosure 1 25000

                                                                                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                                                                                      12mm cable gland 1 1000

                                                                                                                                                                      Screw 3mm 33 2000

                                                                                                                                                                      Screw 35mm 6 2400

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      10 mm spacers 100 1500

                                                                                                                                                                      10mm insert to stud 50 10000

                                                                                                                                                                      cable tie 2500

                                                                                                                                                                      Total 162350

                                                                                                                                                                      CHAPTER 19

                                                                                                                                                                      APPENDIX

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      APPENDIX

                                                                                                                                                                      191 APPENDIX

                                                                                                                                                                      1911 78xx IC datasheet

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      1912 W10 datasheet

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      1913 4n33 IC datasheet

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                      1914 MAX 232

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      CHAPTER 20

                                                                                                                                                                      CONCLUSION

                                                                                                                                                                      CONCLUSION

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      201 CONCLUSION

                                                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                      installed in any business premises

                                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      CHAPTER 21

                                                                                                                                                                      IMAGES OF THE

                                                                                                                                                                      PROJECT

                                                                                                                                                                      Images of the project

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      CHAPTER 22

                                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                                      BOOKS

                                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                      INTERNET LINKS

                                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                      • CHAPTER 1

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        ADVANTAGES OF

                                                                                                                                                                        THE PROJECT

                                                                                                                                                                        Advantages

                                                                                                                                                                        141 ADVANTAGES OF THE PROJECT

                                                                                                                                                                        Simple and hand efficient Microcontroller based system

                                                                                                                                                                        Fast charging capacity

                                                                                                                                                                        Simple to operate

                                                                                                                                                                        Ease of mobility

                                                                                                                                                                        Facilitates connectivity for 90 of cellular phones

                                                                                                                                                                        Less expensive

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 84

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Reduced man power

                                                                                                                                                                        Low power consumption

                                                                                                                                                                        It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                        CHAPTER 15

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        DISADVANTAGES

                                                                                                                                                                        OF THE PROJECT

                                                                                                                                                                        Disadvantages

                                                                                                                                                                        151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                        It requires mains supply to work project

                                                                                                                                                                        Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                        mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                        purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                        min

                                                                                                                                                                        It does not have battery backup therefore it cannot be portable

                                                                                                                                                                        CHAPTER 16

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        APPLICATIONS OF

                                                                                                                                                                        THE PROJECT

                                                                                                                                                                        Application

                                                                                                                                                                        161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                        The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                        charge for the mobile phone in any places

                                                                                                                                                                        It is used for emergency charging purposes

                                                                                                                                                                        It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                        places

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                        businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                        any location where there is a high footfall creating a large number of

                                                                                                                                                                        potential users

                                                                                                                                                                        It can be installed in offices and collages for pay charging facility

                                                                                                                                                                        CHAPTER 17

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        FUTURE

                                                                                                                                                                        DEVELOPMENT OF

                                                                                                                                                                        THE PROJECT

                                                                                                                                                                        FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                        171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                        This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                        condition in public places

                                                                                                                                                                        It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                        It will provide battery backup for make it portable

                                                                                                                                                                        It will also provide SMS system in future

                                                                                                                                                                        We can also increase the charging time by editing software of the project

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        CHAPTER 18

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        COST ANALYSIS

                                                                                                                                                                        OF THE PROJECT

                                                                                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                        1811 Component list for power supply card

                                                                                                                                                                        Footprint Quantity Designators Rate

                                                                                                                                                                        Resistor

                                                                                                                                                                        22K 1 R2 1

                                                                                                                                                                        1K 1 R1 1

                                                                                                                                                                        Capacitor

                                                                                                                                                                        1000uf25V 1 C5 10

                                                                                                                                                                        2200uf25V 1 C1 10

                                                                                                                                                                        022uf 2 C6 C2 1

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                        Table 1811 Component list for power supply card

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        01uf 2 C4 C3 1

                                                                                                                                                                        IC

                                                                                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                                                                                        Connector

                                                                                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                                                                                        Heat sink (TO-220) 2 16

                                                                                                                                                                        Total 955

                                                                                                                                                                        1812 Component list for battery charger card

                                                                                                                                                                        Footprint Quantity Rate

                                                                                                                                                                        Capacitor

                                                                                                                                                                        2200uf25V 1 1000

                                                                                                                                                                        022uf 4 100

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        01uf 4 100

                                                                                                                                                                        IC

                                                                                                                                                                        BRIDGE W10 1 500

                                                                                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                                                                                        Connector

                                                                                                                                                                        CON PHO 2PIN 1 800

                                                                                                                                                                        Relimate 2 pin 1 400

                                                                                                                                                                        relimate 3 pin 4 2000

                                                                                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                                                                                        TOTAL 9300

                                                                                                                                                                        1813 Component list for Relay card

                                                                                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                        Table 1812Component list for battery charger card

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                        Total 18900

                                                                                                                                                                        1814Component list for controller card

                                                                                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                        Table 1813Component list for relay card

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                        total 27000

                                                                                                                                                                        1815 Miscellaneous material

                                                                                                                                                                        Material Quantity Rate

                                                                                                                                                                        electronic item

                                                                                                                                                                        Transformer

                                                                                                                                                                        TXR1 0-9-15 1 20000

                                                                                                                                                                        0-9 1A

                                                                                                                                                                        0-15 100mA

                                                                                                                                                                        TXR2 0-9 1 16500

                                                                                                                                                                        0-9 1A

                                                                                                                                                                        Proximity switch 1 20000

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                        Table 1814Component list for microcontroller card

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Red push bottom 4 4000

                                                                                                                                                                        Green push button 1 1000

                                                                                                                                                                        Red led 5mm 4 800

                                                                                                                                                                        Green led 5mm 4 800

                                                                                                                                                                        Led holder 8 1600

                                                                                                                                                                        Copper clad 2 4000

                                                                                                                                                                        3 core cable 1 meter 1500

                                                                                                                                                                        3 pin plug 1 3000

                                                                                                                                                                        2 pin relimate wire 19 9000

                                                                                                                                                                        3 pin relimate wire 5 3750

                                                                                                                                                                        4 pin relimate wire 2 2000

                                                                                                                                                                        mechanical items

                                                                                                                                                                        Enclosure 1 25000

                                                                                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                                                                                        12mm cable gland 1 1000

                                                                                                                                                                        Screw 3mm 33 2000

                                                                                                                                                                        Screw 35mm 6 2400

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        10 mm spacers 100 1500

                                                                                                                                                                        10mm insert to stud 50 10000

                                                                                                                                                                        cable tie 2500

                                                                                                                                                                        Total 162350

                                                                                                                                                                        CHAPTER 19

                                                                                                                                                                        APPENDIX

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        APPENDIX

                                                                                                                                                                        191 APPENDIX

                                                                                                                                                                        1911 78xx IC datasheet

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        1912 W10 datasheet

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        1913 4n33 IC datasheet

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                        1914 MAX 232

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        CHAPTER 20

                                                                                                                                                                        CONCLUSION

                                                                                                                                                                        CONCLUSION

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        201 CONCLUSION

                                                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                        installed in any business premises

                                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        CHAPTER 21

                                                                                                                                                                        IMAGES OF THE

                                                                                                                                                                        PROJECT

                                                                                                                                                                        Images of the project

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        CHAPTER 22

                                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                                        BOOKS

                                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                        INTERNET LINKS

                                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                        • CHAPTER 1

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Reduced man power

                                                                                                                                                                          Low power consumption

                                                                                                                                                                          It can offer emergency charging for 4sets of handsets synchronously

                                                                                                                                                                          CHAPTER 15

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 85

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          DISADVANTAGES

                                                                                                                                                                          OF THE PROJECT

                                                                                                                                                                          Disadvantages

                                                                                                                                                                          151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                          It requires mains supply to work project

                                                                                                                                                                          Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                          mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                          purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                          min

                                                                                                                                                                          It does not have battery backup therefore it cannot be portable

                                                                                                                                                                          CHAPTER 16

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          APPLICATIONS OF

                                                                                                                                                                          THE PROJECT

                                                                                                                                                                          Application

                                                                                                                                                                          161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                          The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                          charge for the mobile phone in any places

                                                                                                                                                                          It is used for emergency charging purposes

                                                                                                                                                                          It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                          places

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                          businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                          any location where there is a high footfall creating a large number of

                                                                                                                                                                          potential users

                                                                                                                                                                          It can be installed in offices and collages for pay charging facility

                                                                                                                                                                          CHAPTER 17

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          FUTURE

                                                                                                                                                                          DEVELOPMENT OF

                                                                                                                                                                          THE PROJECT

                                                                                                                                                                          FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                          171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                          This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                          condition in public places

                                                                                                                                                                          It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                          It will provide battery backup for make it portable

                                                                                                                                                                          It will also provide SMS system in future

                                                                                                                                                                          We can also increase the charging time by editing software of the project

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          CHAPTER 18

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          COST ANALYSIS

                                                                                                                                                                          OF THE PROJECT

                                                                                                                                                                          COST ANALYSIS OF THE PROJECT

                                                                                                                                                                          181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                          1811 Component list for power supply card

                                                                                                                                                                          Footprint Quantity Designators Rate

                                                                                                                                                                          Resistor

                                                                                                                                                                          22K 1 R2 1

                                                                                                                                                                          1K 1 R1 1

                                                                                                                                                                          Capacitor

                                                                                                                                                                          1000uf25V 1 C5 10

                                                                                                                                                                          2200uf25V 1 C1 10

                                                                                                                                                                          022uf 2 C6 C2 1

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                          Table 1811 Component list for power supply card

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          01uf 2 C4 C3 1

                                                                                                                                                                          IC

                                                                                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                                                                                          Connector

                                                                                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                                                                                          Heat sink (TO-220) 2 16

                                                                                                                                                                          Total 955

                                                                                                                                                                          1812 Component list for battery charger card

                                                                                                                                                                          Footprint Quantity Rate

                                                                                                                                                                          Capacitor

                                                                                                                                                                          2200uf25V 1 1000

                                                                                                                                                                          022uf 4 100

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          01uf 4 100

                                                                                                                                                                          IC

                                                                                                                                                                          BRIDGE W10 1 500

                                                                                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                                                                                          Connector

                                                                                                                                                                          CON PHO 2PIN 1 800

                                                                                                                                                                          Relimate 2 pin 1 400

                                                                                                                                                                          relimate 3 pin 4 2000

                                                                                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                                                                                          TOTAL 9300

                                                                                                                                                                          1813 Component list for Relay card

                                                                                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                          Table 1812Component list for battery charger card

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                          Total 18900

                                                                                                                                                                          1814Component list for controller card

                                                                                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                          Table 1813Component list for relay card

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                          total 27000

                                                                                                                                                                          1815 Miscellaneous material

                                                                                                                                                                          Material Quantity Rate

                                                                                                                                                                          electronic item

                                                                                                                                                                          Transformer

                                                                                                                                                                          TXR1 0-9-15 1 20000

                                                                                                                                                                          0-9 1A

                                                                                                                                                                          0-15 100mA

                                                                                                                                                                          TXR2 0-9 1 16500

                                                                                                                                                                          0-9 1A

                                                                                                                                                                          Proximity switch 1 20000

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                          Table 1814Component list for microcontroller card

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Red push bottom 4 4000

                                                                                                                                                                          Green push button 1 1000

                                                                                                                                                                          Red led 5mm 4 800

                                                                                                                                                                          Green led 5mm 4 800

                                                                                                                                                                          Led holder 8 1600

                                                                                                                                                                          Copper clad 2 4000

                                                                                                                                                                          3 core cable 1 meter 1500

                                                                                                                                                                          3 pin plug 1 3000

                                                                                                                                                                          2 pin relimate wire 19 9000

                                                                                                                                                                          3 pin relimate wire 5 3750

                                                                                                                                                                          4 pin relimate wire 2 2000

                                                                                                                                                                          mechanical items

                                                                                                                                                                          Enclosure 1 25000

                                                                                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                                                                                          12mm cable gland 1 1000

                                                                                                                                                                          Screw 3mm 33 2000

                                                                                                                                                                          Screw 35mm 6 2400

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          10 mm spacers 100 1500

                                                                                                                                                                          10mm insert to stud 50 10000

                                                                                                                                                                          cable tie 2500

                                                                                                                                                                          Total 162350

                                                                                                                                                                          CHAPTER 19

                                                                                                                                                                          APPENDIX

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          APPENDIX

                                                                                                                                                                          191 APPENDIX

                                                                                                                                                                          1911 78xx IC datasheet

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          1912 W10 datasheet

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          1913 4n33 IC datasheet

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                          1914 MAX 232

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          CHAPTER 20

                                                                                                                                                                          CONCLUSION

                                                                                                                                                                          CONCLUSION

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          201 CONCLUSION

                                                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                          installed in any business premises

                                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          CHAPTER 21

                                                                                                                                                                          IMAGES OF THE

                                                                                                                                                                          PROJECT

                                                                                                                                                                          Images of the project

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          CHAPTER 22

                                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                                          BOOKS

                                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                          INTERNET LINKS

                                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                          • CHAPTER 1

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            DISADVANTAGES

                                                                                                                                                                            OF THE PROJECT

                                                                                                                                                                            Disadvantages

                                                                                                                                                                            151 DISADVANTAGES OF THE PROJECT

                                                                                                                                                                            It requires mains supply to work project

                                                                                                                                                                            Due to limited charging channels till now there may be a possibility that

                                                                                                                                                                            mobile phones of few brands cannot be connected for charging For this

                                                                                                                                                                            purpose we have to use separate connectors for that specific brand differently

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 86

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                            min

                                                                                                                                                                            It does not have battery backup therefore it cannot be portable

                                                                                                                                                                            CHAPTER 16

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            APPLICATIONS OF

                                                                                                                                                                            THE PROJECT

                                                                                                                                                                            Application

                                                                                                                                                                            161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                            The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                            charge for the mobile phone in any places

                                                                                                                                                                            It is used for emergency charging purposes

                                                                                                                                                                            It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                            places

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                            businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                            any location where there is a high footfall creating a large number of

                                                                                                                                                                            potential users

                                                                                                                                                                            It can be installed in offices and collages for pay charging facility

                                                                                                                                                                            CHAPTER 17

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            FUTURE

                                                                                                                                                                            DEVELOPMENT OF

                                                                                                                                                                            THE PROJECT

                                                                                                                                                                            FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                            171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                            This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                            condition in public places

                                                                                                                                                                            It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                            It will provide battery backup for make it portable

                                                                                                                                                                            It will also provide SMS system in future

                                                                                                                                                                            We can also increase the charging time by editing software of the project

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            CHAPTER 18

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            COST ANALYSIS

                                                                                                                                                                            OF THE PROJECT

                                                                                                                                                                            COST ANALYSIS OF THE PROJECT

                                                                                                                                                                            181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                            1811 Component list for power supply card

                                                                                                                                                                            Footprint Quantity Designators Rate

                                                                                                                                                                            Resistor

                                                                                                                                                                            22K 1 R2 1

                                                                                                                                                                            1K 1 R1 1

                                                                                                                                                                            Capacitor

                                                                                                                                                                            1000uf25V 1 C5 10

                                                                                                                                                                            2200uf25V 1 C1 10

                                                                                                                                                                            022uf 2 C6 C2 1

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                            Table 1811 Component list for power supply card

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            01uf 2 C4 C3 1

                                                                                                                                                                            IC

                                                                                                                                                                            BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                            L7812CV (TO-220) 1 U2 8

                                                                                                                                                                            L7805CV (TO-220) 1 U1 8

                                                                                                                                                                            Connector

                                                                                                                                                                            CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                            CON PHO 3PIN 1 J1 12

                                                                                                                                                                            LED3mm red 2 L1 L2 15

                                                                                                                                                                            Heat sink (TO-220) 2 16

                                                                                                                                                                            Total 955

                                                                                                                                                                            1812 Component list for battery charger card

                                                                                                                                                                            Footprint Quantity Rate

                                                                                                                                                                            Capacitor

                                                                                                                                                                            2200uf25V 1 1000

                                                                                                                                                                            022uf 4 100

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            01uf 4 100

                                                                                                                                                                            IC

                                                                                                                                                                            BRIDGE W10 1 500

                                                                                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                                                                                            Connector

                                                                                                                                                                            CON PHO 2PIN 1 800

                                                                                                                                                                            Relimate 2 pin 1 400

                                                                                                                                                                            relimate 3 pin 4 2000

                                                                                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                                                                                            TOTAL 9300

                                                                                                                                                                            1813 Component list for Relay card

                                                                                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                            Table 1812Component list for battery charger card

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                            Total 18900

                                                                                                                                                                            1814Component list for controller card

                                                                                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                            Table 1813Component list for relay card

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                            total 27000

                                                                                                                                                                            1815 Miscellaneous material

                                                                                                                                                                            Material Quantity Rate

                                                                                                                                                                            electronic item

                                                                                                                                                                            Transformer

                                                                                                                                                                            TXR1 0-9-15 1 20000

                                                                                                                                                                            0-9 1A

                                                                                                                                                                            0-15 100mA

                                                                                                                                                                            TXR2 0-9 1 16500

                                                                                                                                                                            0-9 1A

                                                                                                                                                                            Proximity switch 1 20000

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                            Table 1814Component list for microcontroller card

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            Red push bottom 4 4000

                                                                                                                                                                            Green push button 1 1000

                                                                                                                                                                            Red led 5mm 4 800

                                                                                                                                                                            Green led 5mm 4 800

                                                                                                                                                                            Led holder 8 1600

                                                                                                                                                                            Copper clad 2 4000

                                                                                                                                                                            3 core cable 1 meter 1500

                                                                                                                                                                            3 pin plug 1 3000

                                                                                                                                                                            2 pin relimate wire 19 9000

                                                                                                                                                                            3 pin relimate wire 5 3750

                                                                                                                                                                            4 pin relimate wire 2 2000

                                                                                                                                                                            mechanical items

                                                                                                                                                                            Enclosure 1 25000

                                                                                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                                                                                            12mm cable gland 1 1000

                                                                                                                                                                            Screw 3mm 33 2000

                                                                                                                                                                            Screw 35mm 6 2400

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            10 mm spacers 100 1500

                                                                                                                                                                            10mm insert to stud 50 10000

                                                                                                                                                                            cable tie 2500

                                                                                                                                                                            Total 162350

                                                                                                                                                                            CHAPTER 19

                                                                                                                                                                            APPENDIX

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            APPENDIX

                                                                                                                                                                            191 APPENDIX

                                                                                                                                                                            1911 78xx IC datasheet

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            1912 W10 datasheet

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            1913 4n33 IC datasheet

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                            1914 MAX 232

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            CHAPTER 20

                                                                                                                                                                            CONCLUSION

                                                                                                                                                                            CONCLUSION

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            201 CONCLUSION

                                                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                            installed in any business premises

                                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            CHAPTER 21

                                                                                                                                                                            IMAGES OF THE

                                                                                                                                                                            PROJECT

                                                                                                                                                                            Images of the project

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            CHAPTER 22

                                                                                                                                                                            BIBILOGRAPHY

                                                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                                            BOOKS

                                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                            INTERNET LINKS

                                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                            • CHAPTER 1

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              It does not bring a mobile from lsquodead to fully charged (full bars) just in 1

                                                                                                                                                                              min

                                                                                                                                                                              It does not have battery backup therefore it cannot be portable

                                                                                                                                                                              CHAPTER 16

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 87

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              APPLICATIONS OF

                                                                                                                                                                              THE PROJECT

                                                                                                                                                                              Application

                                                                                                                                                                              161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                              The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                              charge for the mobile phone in any places

                                                                                                                                                                              It is used for emergency charging purposes

                                                                                                                                                                              It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                              places

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                              businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                              any location where there is a high footfall creating a large number of

                                                                                                                                                                              potential users

                                                                                                                                                                              It can be installed in offices and collages for pay charging facility

                                                                                                                                                                              CHAPTER 17

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              FUTURE

                                                                                                                                                                              DEVELOPMENT OF

                                                                                                                                                                              THE PROJECT

                                                                                                                                                                              FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                              171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                              This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                              condition in public places

                                                                                                                                                                              It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                              It will provide battery backup for make it portable

                                                                                                                                                                              It will also provide SMS system in future

                                                                                                                                                                              We can also increase the charging time by editing software of the project

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              CHAPTER 18

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              COST ANALYSIS

                                                                                                                                                                              OF THE PROJECT

                                                                                                                                                                              COST ANALYSIS OF THE PROJECT

                                                                                                                                                                              181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                              1811 Component list for power supply card

                                                                                                                                                                              Footprint Quantity Designators Rate

                                                                                                                                                                              Resistor

                                                                                                                                                                              22K 1 R2 1

                                                                                                                                                                              1K 1 R1 1

                                                                                                                                                                              Capacitor

                                                                                                                                                                              1000uf25V 1 C5 10

                                                                                                                                                                              2200uf25V 1 C1 10

                                                                                                                                                                              022uf 2 C6 C2 1

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                              Table 1811 Component list for power supply card

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              01uf 2 C4 C3 1

                                                                                                                                                                              IC

                                                                                                                                                                              BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                              L7812CV (TO-220) 1 U2 8

                                                                                                                                                                              L7805CV (TO-220) 1 U1 8

                                                                                                                                                                              Connector

                                                                                                                                                                              CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                              CON PHO 3PIN 1 J1 12

                                                                                                                                                                              LED3mm red 2 L1 L2 15

                                                                                                                                                                              Heat sink (TO-220) 2 16

                                                                                                                                                                              Total 955

                                                                                                                                                                              1812 Component list for battery charger card

                                                                                                                                                                              Footprint Quantity Rate

                                                                                                                                                                              Capacitor

                                                                                                                                                                              2200uf25V 1 1000

                                                                                                                                                                              022uf 4 100

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              01uf 4 100

                                                                                                                                                                              IC

                                                                                                                                                                              BRIDGE W10 1 500

                                                                                                                                                                              L7805CV (TO-220) 4 3200

                                                                                                                                                                              Connector

                                                                                                                                                                              CON PHO 2PIN 1 800

                                                                                                                                                                              Relimate 2 pin 1 400

                                                                                                                                                                              relimate 3 pin 4 2000

                                                                                                                                                                              Heat sink (TO-220) 4 1200

                                                                                                                                                                              TOTAL 9300

                                                                                                                                                                              1813 Component list for Relay card

                                                                                                                                                                              Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                              Table 1812Component list for battery charger card

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                              Total 18900

                                                                                                                                                                              1814Component list for controller card

                                                                                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                              Table 1813Component list for relay card

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                              total 27000

                                                                                                                                                                              1815 Miscellaneous material

                                                                                                                                                                              Material Quantity Rate

                                                                                                                                                                              electronic item

                                                                                                                                                                              Transformer

                                                                                                                                                                              TXR1 0-9-15 1 20000

                                                                                                                                                                              0-9 1A

                                                                                                                                                                              0-15 100mA

                                                                                                                                                                              TXR2 0-9 1 16500

                                                                                                                                                                              0-9 1A

                                                                                                                                                                              Proximity switch 1 20000

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                              Table 1814Component list for microcontroller card

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              Red push bottom 4 4000

                                                                                                                                                                              Green push button 1 1000

                                                                                                                                                                              Red led 5mm 4 800

                                                                                                                                                                              Green led 5mm 4 800

                                                                                                                                                                              Led holder 8 1600

                                                                                                                                                                              Copper clad 2 4000

                                                                                                                                                                              3 core cable 1 meter 1500

                                                                                                                                                                              3 pin plug 1 3000

                                                                                                                                                                              2 pin relimate wire 19 9000

                                                                                                                                                                              3 pin relimate wire 5 3750

                                                                                                                                                                              4 pin relimate wire 2 2000

                                                                                                                                                                              mechanical items

                                                                                                                                                                              Enclosure 1 25000

                                                                                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                                                                                              12mm cable gland 1 1000

                                                                                                                                                                              Screw 3mm 33 2000

                                                                                                                                                                              Screw 35mm 6 2400

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              10 mm spacers 100 1500

                                                                                                                                                                              10mm insert to stud 50 10000

                                                                                                                                                                              cable tie 2500

                                                                                                                                                                              Total 162350

                                                                                                                                                                              CHAPTER 19

                                                                                                                                                                              APPENDIX

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              APPENDIX

                                                                                                                                                                              191 APPENDIX

                                                                                                                                                                              1911 78xx IC datasheet

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              1912 W10 datasheet

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              1913 4n33 IC datasheet

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                              1914 MAX 232

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              CHAPTER 20

                                                                                                                                                                              CONCLUSION

                                                                                                                                                                              CONCLUSION

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              201 CONCLUSION

                                                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                              installed in any business premises

                                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              CHAPTER 21

                                                                                                                                                                              IMAGES OF THE

                                                                                                                                                                              PROJECT

                                                                                                                                                                              Images of the project

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              CHAPTER 22

                                                                                                                                                                              BIBILOGRAPHY

                                                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                                                              BOOKS

                                                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                              INTERNET LINKS

                                                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                              • CHAPTER 1

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                APPLICATIONS OF

                                                                                                                                                                                THE PROJECT

                                                                                                                                                                                Application

                                                                                                                                                                                161 APPLICATIONS OF THE PROJECT

                                                                                                                                                                                The coin based mobile phone charger is very useful to public for using coin to

                                                                                                                                                                                charge for the mobile phone in any places

                                                                                                                                                                                It is used for emergency charging purposes

                                                                                                                                                                                It can be installed in malls railway stations bus stops and other public

                                                                                                                                                                                places

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 88

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                                businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                                any location where there is a high footfall creating a large number of

                                                                                                                                                                                potential users

                                                                                                                                                                                It can be installed in offices and collages for pay charging facility

                                                                                                                                                                                CHAPTER 17

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                FUTURE

                                                                                                                                                                                DEVELOPMENT OF

                                                                                                                                                                                THE PROJECT

                                                                                                                                                                                FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                                171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                                This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                                condition in public places

                                                                                                                                                                                It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                                It will provide battery backup for make it portable

                                                                                                                                                                                It will also provide SMS system in future

                                                                                                                                                                                We can also increase the charging time by editing software of the project

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                CHAPTER 18

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                COST ANALYSIS

                                                                                                                                                                                OF THE PROJECT

                                                                                                                                                                                COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                1811 Component list for power supply card

                                                                                                                                                                                Footprint Quantity Designators Rate

                                                                                                                                                                                Resistor

                                                                                                                                                                                22K 1 R2 1

                                                                                                                                                                                1K 1 R1 1

                                                                                                                                                                                Capacitor

                                                                                                                                                                                1000uf25V 1 C5 10

                                                                                                                                                                                2200uf25V 1 C1 10

                                                                                                                                                                                022uf 2 C6 C2 1

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                                Table 1811 Component list for power supply card

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                01uf 2 C4 C3 1

                                                                                                                                                                                IC

                                                                                                                                                                                BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                Connector

                                                                                                                                                                                CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                CON PHO 3PIN 1 J1 12

                                                                                                                                                                                LED3mm red 2 L1 L2 15

                                                                                                                                                                                Heat sink (TO-220) 2 16

                                                                                                                                                                                Total 955

                                                                                                                                                                                1812 Component list for battery charger card

                                                                                                                                                                                Footprint Quantity Rate

                                                                                                                                                                                Capacitor

                                                                                                                                                                                2200uf25V 1 1000

                                                                                                                                                                                022uf 4 100

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                01uf 4 100

                                                                                                                                                                                IC

                                                                                                                                                                                BRIDGE W10 1 500

                                                                                                                                                                                L7805CV (TO-220) 4 3200

                                                                                                                                                                                Connector

                                                                                                                                                                                CON PHO 2PIN 1 800

                                                                                                                                                                                Relimate 2 pin 1 400

                                                                                                                                                                                relimate 3 pin 4 2000

                                                                                                                                                                                Heat sink (TO-220) 4 1200

                                                                                                                                                                                TOTAL 9300

                                                                                                                                                                                1813 Component list for Relay card

                                                                                                                                                                                Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                Table 1812Component list for battery charger card

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                Total 18900

                                                                                                                                                                                1814Component list for controller card

                                                                                                                                                                                Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                Table 1813Component list for relay card

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                total 27000

                                                                                                                                                                                1815 Miscellaneous material

                                                                                                                                                                                Material Quantity Rate

                                                                                                                                                                                electronic item

                                                                                                                                                                                Transformer

                                                                                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                                                                                0-9 1A

                                                                                                                                                                                0-15 100mA

                                                                                                                                                                                TXR2 0-9 1 16500

                                                                                                                                                                                0-9 1A

                                                                                                                                                                                Proximity switch 1 20000

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                Red push bottom 4 4000

                                                                                                                                                                                Green push button 1 1000

                                                                                                                                                                                Red led 5mm 4 800

                                                                                                                                                                                Green led 5mm 4 800

                                                                                                                                                                                Led holder 8 1600

                                                                                                                                                                                Copper clad 2 4000

                                                                                                                                                                                3 core cable 1 meter 1500

                                                                                                                                                                                3 pin plug 1 3000

                                                                                                                                                                                2 pin relimate wire 19 9000

                                                                                                                                                                                3 pin relimate wire 5 3750

                                                                                                                                                                                4 pin relimate wire 2 2000

                                                                                                                                                                                mechanical items

                                                                                                                                                                                Enclosure 1 25000

                                                                                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                                                                                12mm cable gland 1 1000

                                                                                                                                                                                Screw 3mm 33 2000

                                                                                                                                                                                Screw 35mm 6 2400

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                10 mm spacers 100 1500

                                                                                                                                                                                10mm insert to stud 50 10000

                                                                                                                                                                                cable tie 2500

                                                                                                                                                                                Total 162350

                                                                                                                                                                                CHAPTER 19

                                                                                                                                                                                APPENDIX

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                APPENDIX

                                                                                                                                                                                191 APPENDIX

                                                                                                                                                                                1911 78xx IC datasheet

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                1912 W10 datasheet

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                1913 4n33 IC datasheet

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                1914 MAX 232

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                CHAPTER 20

                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                201 CONCLUSION

                                                                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                installed in any business premises

                                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                CHAPTER 21

                                                                                                                                                                                IMAGES OF THE

                                                                                                                                                                                PROJECT

                                                                                                                                                                                Images of the project

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                CHAPTER 22

                                                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                                                BOOKS

                                                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                INTERNET LINKS

                                                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                • CHAPTER 1

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of

                                                                                                                                                                                  businesses - from airports to pubs from universities to health clubs virtually

                                                                                                                                                                                  any location where there is a high footfall creating a large number of

                                                                                                                                                                                  potential users

                                                                                                                                                                                  It can be installed in offices and collages for pay charging facility

                                                                                                                                                                                  CHAPTER 17

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 89

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  FUTURE

                                                                                                                                                                                  DEVELOPMENT OF

                                                                                                                                                                                  THE PROJECT

                                                                                                                                                                                  FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                                  171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                                  This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                                  condition in public places

                                                                                                                                                                                  It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                                  It will provide battery backup for make it portable

                                                                                                                                                                                  It will also provide SMS system in future

                                                                                                                                                                                  We can also increase the charging time by editing software of the project

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  CHAPTER 18

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  COST ANALYSIS

                                                                                                                                                                                  OF THE PROJECT

                                                                                                                                                                                  COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                  181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                  1811 Component list for power supply card

                                                                                                                                                                                  Footprint Quantity Designators Rate

                                                                                                                                                                                  Resistor

                                                                                                                                                                                  22K 1 R2 1

                                                                                                                                                                                  1K 1 R1 1

                                                                                                                                                                                  Capacitor

                                                                                                                                                                                  1000uf25V 1 C5 10

                                                                                                                                                                                  2200uf25V 1 C1 10

                                                                                                                                                                                  022uf 2 C6 C2 1

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                                  Table 1811 Component list for power supply card

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  01uf 2 C4 C3 1

                                                                                                                                                                                  IC

                                                                                                                                                                                  BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                  L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                  L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                  Connector

                                                                                                                                                                                  CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                  CON PHO 3PIN 1 J1 12

                                                                                                                                                                                  LED3mm red 2 L1 L2 15

                                                                                                                                                                                  Heat sink (TO-220) 2 16

                                                                                                                                                                                  Total 955

                                                                                                                                                                                  1812 Component list for battery charger card

                                                                                                                                                                                  Footprint Quantity Rate

                                                                                                                                                                                  Capacitor

                                                                                                                                                                                  2200uf25V 1 1000

                                                                                                                                                                                  022uf 4 100

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  01uf 4 100

                                                                                                                                                                                  IC

                                                                                                                                                                                  BRIDGE W10 1 500

                                                                                                                                                                                  L7805CV (TO-220) 4 3200

                                                                                                                                                                                  Connector

                                                                                                                                                                                  CON PHO 2PIN 1 800

                                                                                                                                                                                  Relimate 2 pin 1 400

                                                                                                                                                                                  relimate 3 pin 4 2000

                                                                                                                                                                                  Heat sink (TO-220) 4 1200

                                                                                                                                                                                  TOTAL 9300

                                                                                                                                                                                  1813 Component list for Relay card

                                                                                                                                                                                  Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                  Table 1812Component list for battery charger card

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                  Total 18900

                                                                                                                                                                                  1814Component list for controller card

                                                                                                                                                                                  Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                  Table 1813Component list for relay card

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                  total 27000

                                                                                                                                                                                  1815 Miscellaneous material

                                                                                                                                                                                  Material Quantity Rate

                                                                                                                                                                                  electronic item

                                                                                                                                                                                  Transformer

                                                                                                                                                                                  TXR1 0-9-15 1 20000

                                                                                                                                                                                  0-9 1A

                                                                                                                                                                                  0-15 100mA

                                                                                                                                                                                  TXR2 0-9 1 16500

                                                                                                                                                                                  0-9 1A

                                                                                                                                                                                  Proximity switch 1 20000

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                  Table 1814Component list for microcontroller card

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  Red push bottom 4 4000

                                                                                                                                                                                  Green push button 1 1000

                                                                                                                                                                                  Red led 5mm 4 800

                                                                                                                                                                                  Green led 5mm 4 800

                                                                                                                                                                                  Led holder 8 1600

                                                                                                                                                                                  Copper clad 2 4000

                                                                                                                                                                                  3 core cable 1 meter 1500

                                                                                                                                                                                  3 pin plug 1 3000

                                                                                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                                                                                  mechanical items

                                                                                                                                                                                  Enclosure 1 25000

                                                                                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                                                                                  12mm cable gland 1 1000

                                                                                                                                                                                  Screw 3mm 33 2000

                                                                                                                                                                                  Screw 35mm 6 2400

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  10 mm spacers 100 1500

                                                                                                                                                                                  10mm insert to stud 50 10000

                                                                                                                                                                                  cable tie 2500

                                                                                                                                                                                  Total 162350

                                                                                                                                                                                  CHAPTER 19

                                                                                                                                                                                  APPENDIX

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  APPENDIX

                                                                                                                                                                                  191 APPENDIX

                                                                                                                                                                                  1911 78xx IC datasheet

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  1912 W10 datasheet

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  1913 4n33 IC datasheet

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                  1914 MAX 232

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  CHAPTER 20

                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  201 CONCLUSION

                                                                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                  installed in any business premises

                                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  CHAPTER 21

                                                                                                                                                                                  IMAGES OF THE

                                                                                                                                                                                  PROJECT

                                                                                                                                                                                  Images of the project

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  CHAPTER 22

                                                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                                                  BOOKS

                                                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                  INTERNET LINKS

                                                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                  • CHAPTER 1

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    FUTURE

                                                                                                                                                                                    DEVELOPMENT OF

                                                                                                                                                                                    THE PROJECT

                                                                                                                                                                                    FUTURE DEVELOPMENT OF THE PROJECT

                                                                                                                                                                                    171 FUTURE DEVELOPMENTOFTHE PROJECT

                                                                                                                                                                                    This project is very useful to people who are using mobile phone without charging

                                                                                                                                                                                    condition in public places

                                                                                                                                                                                    It will use with a stereo advertisement carrier that can display video advertisement

                                                                                                                                                                                    It will provide battery backup for make it portable

                                                                                                                                                                                    It will also provide SMS system in future

                                                                                                                                                                                    We can also increase the charging time by editing software of the project

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 90

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    CHAPTER 18

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    COST ANALYSIS

                                                                                                                                                                                    OF THE PROJECT

                                                                                                                                                                                    COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                    181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                    1811 Component list for power supply card

                                                                                                                                                                                    Footprint Quantity Designators Rate

                                                                                                                                                                                    Resistor

                                                                                                                                                                                    22K 1 R2 1

                                                                                                                                                                                    1K 1 R1 1

                                                                                                                                                                                    Capacitor

                                                                                                                                                                                    1000uf25V 1 C5 10

                                                                                                                                                                                    2200uf25V 1 C1 10

                                                                                                                                                                                    022uf 2 C6 C2 1

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                                    Table 1811 Component list for power supply card

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    01uf 2 C4 C3 1

                                                                                                                                                                                    IC

                                                                                                                                                                                    BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                    L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                    L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                    Connector

                                                                                                                                                                                    CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                    CON PHO 3PIN 1 J1 12

                                                                                                                                                                                    LED3mm red 2 L1 L2 15

                                                                                                                                                                                    Heat sink (TO-220) 2 16

                                                                                                                                                                                    Total 955

                                                                                                                                                                                    1812 Component list for battery charger card

                                                                                                                                                                                    Footprint Quantity Rate

                                                                                                                                                                                    Capacitor

                                                                                                                                                                                    2200uf25V 1 1000

                                                                                                                                                                                    022uf 4 100

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    01uf 4 100

                                                                                                                                                                                    IC

                                                                                                                                                                                    BRIDGE W10 1 500

                                                                                                                                                                                    L7805CV (TO-220) 4 3200

                                                                                                                                                                                    Connector

                                                                                                                                                                                    CON PHO 2PIN 1 800

                                                                                                                                                                                    Relimate 2 pin 1 400

                                                                                                                                                                                    relimate 3 pin 4 2000

                                                                                                                                                                                    Heat sink (TO-220) 4 1200

                                                                                                                                                                                    TOTAL 9300

                                                                                                                                                                                    1813 Component list for Relay card

                                                                                                                                                                                    Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                    Table 1812Component list for battery charger card

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                    Total 18900

                                                                                                                                                                                    1814Component list for controller card

                                                                                                                                                                                    Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                    Table 1813Component list for relay card

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                    total 27000

                                                                                                                                                                                    1815 Miscellaneous material

                                                                                                                                                                                    Material Quantity Rate

                                                                                                                                                                                    electronic item

                                                                                                                                                                                    Transformer

                                                                                                                                                                                    TXR1 0-9-15 1 20000

                                                                                                                                                                                    0-9 1A

                                                                                                                                                                                    0-15 100mA

                                                                                                                                                                                    TXR2 0-9 1 16500

                                                                                                                                                                                    0-9 1A

                                                                                                                                                                                    Proximity switch 1 20000

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                    Table 1814Component list for microcontroller card

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    Red push bottom 4 4000

                                                                                                                                                                                    Green push button 1 1000

                                                                                                                                                                                    Red led 5mm 4 800

                                                                                                                                                                                    Green led 5mm 4 800

                                                                                                                                                                                    Led holder 8 1600

                                                                                                                                                                                    Copper clad 2 4000

                                                                                                                                                                                    3 core cable 1 meter 1500

                                                                                                                                                                                    3 pin plug 1 3000

                                                                                                                                                                                    2 pin relimate wire 19 9000

                                                                                                                                                                                    3 pin relimate wire 5 3750

                                                                                                                                                                                    4 pin relimate wire 2 2000

                                                                                                                                                                                    mechanical items

                                                                                                                                                                                    Enclosure 1 25000

                                                                                                                                                                                    Acrylic sheet 2 X 1 30000

                                                                                                                                                                                    12mm cable gland 1 1000

                                                                                                                                                                                    Screw 3mm 33 2000

                                                                                                                                                                                    Screw 35mm 6 2400

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    10 mm spacers 100 1500

                                                                                                                                                                                    10mm insert to stud 50 10000

                                                                                                                                                                                    cable tie 2500

                                                                                                                                                                                    Total 162350

                                                                                                                                                                                    CHAPTER 19

                                                                                                                                                                                    APPENDIX

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    APPENDIX

                                                                                                                                                                                    191 APPENDIX

                                                                                                                                                                                    1911 78xx IC datasheet

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    1912 W10 datasheet

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    1913 4n33 IC datasheet

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                    1914 MAX 232

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    CHAPTER 20

                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    201 CONCLUSION

                                                                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                    installed in any business premises

                                                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    CHAPTER 21

                                                                                                                                                                                    IMAGES OF THE

                                                                                                                                                                                    PROJECT

                                                                                                                                                                                    Images of the project

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    CHAPTER 22

                                                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                                                    BOOKS

                                                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                    INTERNET LINKS

                                                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                    • CHAPTER 1

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      CHAPTER 18

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 91

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      COST ANALYSIS

                                                                                                                                                                                      OF THE PROJECT

                                                                                                                                                                                      COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                      181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                      1811 Component list for power supply card

                                                                                                                                                                                      Footprint Quantity Designators Rate

                                                                                                                                                                                      Resistor

                                                                                                                                                                                      22K 1 R2 1

                                                                                                                                                                                      1K 1 R1 1

                                                                                                                                                                                      Capacitor

                                                                                                                                                                                      1000uf25V 1 C5 10

                                                                                                                                                                                      2200uf25V 1 C1 10

                                                                                                                                                                                      022uf 2 C6 C2 1

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                                      Table 1811 Component list for power supply card

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      01uf 2 C4 C3 1

                                                                                                                                                                                      IC

                                                                                                                                                                                      BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                      L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                      L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                      Connector

                                                                                                                                                                                      CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                      CON PHO 3PIN 1 J1 12

                                                                                                                                                                                      LED3mm red 2 L1 L2 15

                                                                                                                                                                                      Heat sink (TO-220) 2 16

                                                                                                                                                                                      Total 955

                                                                                                                                                                                      1812 Component list for battery charger card

                                                                                                                                                                                      Footprint Quantity Rate

                                                                                                                                                                                      Capacitor

                                                                                                                                                                                      2200uf25V 1 1000

                                                                                                                                                                                      022uf 4 100

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      01uf 4 100

                                                                                                                                                                                      IC

                                                                                                                                                                                      BRIDGE W10 1 500

                                                                                                                                                                                      L7805CV (TO-220) 4 3200

                                                                                                                                                                                      Connector

                                                                                                                                                                                      CON PHO 2PIN 1 800

                                                                                                                                                                                      Relimate 2 pin 1 400

                                                                                                                                                                                      relimate 3 pin 4 2000

                                                                                                                                                                                      Heat sink (TO-220) 4 1200

                                                                                                                                                                                      TOTAL 9300

                                                                                                                                                                                      1813 Component list for Relay card

                                                                                                                                                                                      Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                      Table 1812Component list for battery charger card

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                      Total 18900

                                                                                                                                                                                      1814Component list for controller card

                                                                                                                                                                                      Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                      Table 1813Component list for relay card

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                      total 27000

                                                                                                                                                                                      1815 Miscellaneous material

                                                                                                                                                                                      Material Quantity Rate

                                                                                                                                                                                      electronic item

                                                                                                                                                                                      Transformer

                                                                                                                                                                                      TXR1 0-9-15 1 20000

                                                                                                                                                                                      0-9 1A

                                                                                                                                                                                      0-15 100mA

                                                                                                                                                                                      TXR2 0-9 1 16500

                                                                                                                                                                                      0-9 1A

                                                                                                                                                                                      Proximity switch 1 20000

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                      Table 1814Component list for microcontroller card

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      Red push bottom 4 4000

                                                                                                                                                                                      Green push button 1 1000

                                                                                                                                                                                      Red led 5mm 4 800

                                                                                                                                                                                      Green led 5mm 4 800

                                                                                                                                                                                      Led holder 8 1600

                                                                                                                                                                                      Copper clad 2 4000

                                                                                                                                                                                      3 core cable 1 meter 1500

                                                                                                                                                                                      3 pin plug 1 3000

                                                                                                                                                                                      2 pin relimate wire 19 9000

                                                                                                                                                                                      3 pin relimate wire 5 3750

                                                                                                                                                                                      4 pin relimate wire 2 2000

                                                                                                                                                                                      mechanical items

                                                                                                                                                                                      Enclosure 1 25000

                                                                                                                                                                                      Acrylic sheet 2 X 1 30000

                                                                                                                                                                                      12mm cable gland 1 1000

                                                                                                                                                                                      Screw 3mm 33 2000

                                                                                                                                                                                      Screw 35mm 6 2400

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      10 mm spacers 100 1500

                                                                                                                                                                                      10mm insert to stud 50 10000

                                                                                                                                                                                      cable tie 2500

                                                                                                                                                                                      Total 162350

                                                                                                                                                                                      CHAPTER 19

                                                                                                                                                                                      APPENDIX

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                      Table 1815Component list for miscellaneous material

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      APPENDIX

                                                                                                                                                                                      191 APPENDIX

                                                                                                                                                                                      1911 78xx IC datasheet

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      1912 W10 datasheet

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      1913 4n33 IC datasheet

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                      1914 MAX 232

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      CHAPTER 20

                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      201 CONCLUSION

                                                                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                      installed in any business premises

                                                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      CHAPTER 21

                                                                                                                                                                                      IMAGES OF THE

                                                                                                                                                                                      PROJECT

                                                                                                                                                                                      Images of the project

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      CHAPTER 22

                                                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                                                      BOOKS

                                                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                      INTERNET LINKS

                                                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                      • CHAPTER 1

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        COST ANALYSIS

                                                                                                                                                                                        OF THE PROJECT

                                                                                                                                                                                        COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                        181 COST ANALYSIS OF THE PROJECT

                                                                                                                                                                                        1811 Component list for power supply card

                                                                                                                                                                                        Footprint Quantity Designators Rate

                                                                                                                                                                                        Resistor

                                                                                                                                                                                        22K 1 R2 1

                                                                                                                                                                                        1K 1 R1 1

                                                                                                                                                                                        Capacitor

                                                                                                                                                                                        1000uf25V 1 C5 10

                                                                                                                                                                                        2200uf25V 1 C1 10

                                                                                                                                                                                        022uf 2 C6 C2 1

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 92

                                                                                                                                                                                        Table 1811 Component list for power supply card

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        01uf 2 C4 C3 1

                                                                                                                                                                                        IC

                                                                                                                                                                                        BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                        L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                        L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                        Connector

                                                                                                                                                                                        CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                        CON PHO 3PIN 1 J1 12

                                                                                                                                                                                        LED3mm red 2 L1 L2 15

                                                                                                                                                                                        Heat sink (TO-220) 2 16

                                                                                                                                                                                        Total 955

                                                                                                                                                                                        1812 Component list for battery charger card

                                                                                                                                                                                        Footprint Quantity Rate

                                                                                                                                                                                        Capacitor

                                                                                                                                                                                        2200uf25V 1 1000

                                                                                                                                                                                        022uf 4 100

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        01uf 4 100

                                                                                                                                                                                        IC

                                                                                                                                                                                        BRIDGE W10 1 500

                                                                                                                                                                                        L7805CV (TO-220) 4 3200

                                                                                                                                                                                        Connector

                                                                                                                                                                                        CON PHO 2PIN 1 800

                                                                                                                                                                                        Relimate 2 pin 1 400

                                                                                                                                                                                        relimate 3 pin 4 2000

                                                                                                                                                                                        Heat sink (TO-220) 4 1200

                                                                                                                                                                                        TOTAL 9300

                                                                                                                                                                                        1813 Component list for Relay card

                                                                                                                                                                                        Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                        Table 1812Component list for battery charger card

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                        Total 18900

                                                                                                                                                                                        1814Component list for controller card

                                                                                                                                                                                        Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                        Table 1813Component list for relay card

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                        total 27000

                                                                                                                                                                                        1815 Miscellaneous material

                                                                                                                                                                                        Material Quantity Rate

                                                                                                                                                                                        electronic item

                                                                                                                                                                                        Transformer

                                                                                                                                                                                        TXR1 0-9-15 1 20000

                                                                                                                                                                                        0-9 1A

                                                                                                                                                                                        0-15 100mA

                                                                                                                                                                                        TXR2 0-9 1 16500

                                                                                                                                                                                        0-9 1A

                                                                                                                                                                                        Proximity switch 1 20000

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                        Table 1814Component list for microcontroller card

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        Red push bottom 4 4000

                                                                                                                                                                                        Green push button 1 1000

                                                                                                                                                                                        Red led 5mm 4 800

                                                                                                                                                                                        Green led 5mm 4 800

                                                                                                                                                                                        Led holder 8 1600

                                                                                                                                                                                        Copper clad 2 4000

                                                                                                                                                                                        3 core cable 1 meter 1500

                                                                                                                                                                                        3 pin plug 1 3000

                                                                                                                                                                                        2 pin relimate wire 19 9000

                                                                                                                                                                                        3 pin relimate wire 5 3750

                                                                                                                                                                                        4 pin relimate wire 2 2000

                                                                                                                                                                                        mechanical items

                                                                                                                                                                                        Enclosure 1 25000

                                                                                                                                                                                        Acrylic sheet 2 X 1 30000

                                                                                                                                                                                        12mm cable gland 1 1000

                                                                                                                                                                                        Screw 3mm 33 2000

                                                                                                                                                                                        Screw 35mm 6 2400

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        10 mm spacers 100 1500

                                                                                                                                                                                        10mm insert to stud 50 10000

                                                                                                                                                                                        cable tie 2500

                                                                                                                                                                                        Total 162350

                                                                                                                                                                                        CHAPTER 19

                                                                                                                                                                                        APPENDIX

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                        Table 1815Component list for miscellaneous material

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        APPENDIX

                                                                                                                                                                                        191 APPENDIX

                                                                                                                                                                                        1911 78xx IC datasheet

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        1912 W10 datasheet

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        1913 4n33 IC datasheet

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                        1914 MAX 232

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        CHAPTER 20

                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        201 CONCLUSION

                                                                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                        installed in any business premises

                                                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        CHAPTER 21

                                                                                                                                                                                        IMAGES OF THE

                                                                                                                                                                                        PROJECT

                                                                                                                                                                                        Images of the project

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        CHAPTER 22

                                                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                                                        BOOKS

                                                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                        INTERNET LINKS

                                                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                        • CHAPTER 1

                                                                                                                                                                                          Table 1811 Component list for power supply card

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          01uf 2 C4 C3 1

                                                                                                                                                                                          IC

                                                                                                                                                                                          BRIDGE W10 2 BR2 BR1 10

                                                                                                                                                                                          L7812CV (TO-220) 1 U2 8

                                                                                                                                                                                          L7805CV (TO-220) 1 U1 8

                                                                                                                                                                                          Connector

                                                                                                                                                                                          CON PHO 2PIN 2 J3 J2 16

                                                                                                                                                                                          CON PHO 3PIN 1 J1 12

                                                                                                                                                                                          LED3mm red 2 L1 L2 15

                                                                                                                                                                                          Heat sink (TO-220) 2 16

                                                                                                                                                                                          Total 955

                                                                                                                                                                                          1812 Component list for battery charger card

                                                                                                                                                                                          Footprint Quantity Rate

                                                                                                                                                                                          Capacitor

                                                                                                                                                                                          2200uf25V 1 1000

                                                                                                                                                                                          022uf 4 100

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 93

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          01uf 4 100

                                                                                                                                                                                          IC

                                                                                                                                                                                          BRIDGE W10 1 500

                                                                                                                                                                                          L7805CV (TO-220) 4 3200

                                                                                                                                                                                          Connector

                                                                                                                                                                                          CON PHO 2PIN 1 800

                                                                                                                                                                                          Relimate 2 pin 1 400

                                                                                                                                                                                          relimate 3 pin 4 2000

                                                                                                                                                                                          Heat sink (TO-220) 4 1200

                                                                                                                                                                                          TOTAL 9300

                                                                                                                                                                                          1813 Component list for Relay card

                                                                                                                                                                                          Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                          Table 1812Component list for battery charger card

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                          Total 18900

                                                                                                                                                                                          1814Component list for controller card

                                                                                                                                                                                          Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                          Table 1813Component list for relay card

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                          total 27000

                                                                                                                                                                                          1815 Miscellaneous material

                                                                                                                                                                                          Material Quantity Rate

                                                                                                                                                                                          electronic item

                                                                                                                                                                                          Transformer

                                                                                                                                                                                          TXR1 0-9-15 1 20000

                                                                                                                                                                                          0-9 1A

                                                                                                                                                                                          0-15 100mA

                                                                                                                                                                                          TXR2 0-9 1 16500

                                                                                                                                                                                          0-9 1A

                                                                                                                                                                                          Proximity switch 1 20000

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                          Table 1814Component list for microcontroller card

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          Red push bottom 4 4000

                                                                                                                                                                                          Green push button 1 1000

                                                                                                                                                                                          Red led 5mm 4 800

                                                                                                                                                                                          Green led 5mm 4 800

                                                                                                                                                                                          Led holder 8 1600

                                                                                                                                                                                          Copper clad 2 4000

                                                                                                                                                                                          3 core cable 1 meter 1500

                                                                                                                                                                                          3 pin plug 1 3000

                                                                                                                                                                                          2 pin relimate wire 19 9000

                                                                                                                                                                                          3 pin relimate wire 5 3750

                                                                                                                                                                                          4 pin relimate wire 2 2000

                                                                                                                                                                                          mechanical items

                                                                                                                                                                                          Enclosure 1 25000

                                                                                                                                                                                          Acrylic sheet 2 X 1 30000

                                                                                                                                                                                          12mm cable gland 1 1000

                                                                                                                                                                                          Screw 3mm 33 2000

                                                                                                                                                                                          Screw 35mm 6 2400

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          10 mm spacers 100 1500

                                                                                                                                                                                          10mm insert to stud 50 10000

                                                                                                                                                                                          cable tie 2500

                                                                                                                                                                                          Total 162350

                                                                                                                                                                                          CHAPTER 19

                                                                                                                                                                                          APPENDIX

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                          Table 1815Component list for miscellaneous material

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          APPENDIX

                                                                                                                                                                                          191 APPENDIX

                                                                                                                                                                                          1911 78xx IC datasheet

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          1912 W10 datasheet

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          1913 4n33 IC datasheet

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                          1914 MAX 232

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          CHAPTER 20

                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          201 CONCLUSION

                                                                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                          installed in any business premises

                                                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          CHAPTER 21

                                                                                                                                                                                          IMAGES OF THE

                                                                                                                                                                                          PROJECT

                                                                                                                                                                                          Images of the project

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          CHAPTER 22

                                                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                                                          BOOKS

                                                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                          INTERNET LINKS

                                                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                          • CHAPTER 1

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            01uf 4 100

                                                                                                                                                                                            IC

                                                                                                                                                                                            BRIDGE W10 1 500

                                                                                                                                                                                            L7805CV (TO-220) 4 3200

                                                                                                                                                                                            Connector

                                                                                                                                                                                            CON PHO 2PIN 1 800

                                                                                                                                                                                            Relimate 2 pin 1 400

                                                                                                                                                                                            relimate 3 pin 4 2000

                                                                                                                                                                                            Heat sink (TO-220) 4 1200

                                                                                                                                                                                            TOTAL 9300

                                                                                                                                                                                            1813 Component list for Relay card

                                                                                                                                                                                            Component Quantity Designators Rate ULN2003 1 U1 500RELAY RW-SH-112D 4 RL1 RL2 RL3 RL4 14000 RELIM-2 10 J2 J3 J4 J5 3300 J6 J7 J8 J9 J10 J11

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 94

                                                                                                                                                                                            Table 1812Component list for battery charger card

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                            Total 18900

                                                                                                                                                                                            1814Component list for controller card

                                                                                                                                                                                            Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                            Table 1813Component list for relay card

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                            total 27000

                                                                                                                                                                                            1815 Miscellaneous material

                                                                                                                                                                                            Material Quantity Rate

                                                                                                                                                                                            electronic item

                                                                                                                                                                                            Transformer

                                                                                                                                                                                            TXR1 0-9-15 1 20000

                                                                                                                                                                                            0-9 1A

                                                                                                                                                                                            0-15 100mA

                                                                                                                                                                                            TXR2 0-9 1 16500

                                                                                                                                                                                            0-9 1A

                                                                                                                                                                                            Proximity switch 1 20000

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                            Table 1814Component list for microcontroller card

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            Red push bottom 4 4000

                                                                                                                                                                                            Green push button 1 1000

                                                                                                                                                                                            Red led 5mm 4 800

                                                                                                                                                                                            Green led 5mm 4 800

                                                                                                                                                                                            Led holder 8 1600

                                                                                                                                                                                            Copper clad 2 4000

                                                                                                                                                                                            3 core cable 1 meter 1500

                                                                                                                                                                                            3 pin plug 1 3000

                                                                                                                                                                                            2 pin relimate wire 19 9000

                                                                                                                                                                                            3 pin relimate wire 5 3750

                                                                                                                                                                                            4 pin relimate wire 2 2000

                                                                                                                                                                                            mechanical items

                                                                                                                                                                                            Enclosure 1 25000

                                                                                                                                                                                            Acrylic sheet 2 X 1 30000

                                                                                                                                                                                            12mm cable gland 1 1000

                                                                                                                                                                                            Screw 3mm 33 2000

                                                                                                                                                                                            Screw 35mm 6 2400

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            10 mm spacers 100 1500

                                                                                                                                                                                            10mm insert to stud 50 10000

                                                                                                                                                                                            cable tie 2500

                                                                                                                                                                                            Total 162350

                                                                                                                                                                                            CHAPTER 19

                                                                                                                                                                                            APPENDIX

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                            Table 1815Component list for miscellaneous material

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            APPENDIX

                                                                                                                                                                                            191 APPENDIX

                                                                                                                                                                                            1911 78xx IC datasheet

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            1912 W10 datasheet

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            1913 4n33 IC datasheet

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                            1914 MAX 232

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            CHAPTER 20

                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            201 CONCLUSION

                                                                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                            installed in any business premises

                                                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            CHAPTER 21

                                                                                                                                                                                            IMAGES OF THE

                                                                                                                                                                                            PROJECT

                                                                                                                                                                                            Images of the project

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            CHAPTER 22

                                                                                                                                                                                            BIBILOGRAPHY

                                                                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                                                            BOOKS

                                                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                            INTERNET LINKS

                                                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                            • CHAPTER 1

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              RELIM-4 1 J1 700 16 pin ic socket 1 400

                                                                                                                                                                                              Total 18900

                                                                                                                                                                                              1814Component list for controller card

                                                                                                                                                                                              Component Quantity Designators Rate Capacitor 01uf 2 C5 C4 2001uf 4 C9 C8 C7 C6 40022pf 2 C3 C2 20033uf 1 C1 300 Resistor 10K 1 R1 10022K 1 R8 1001K 6 R7 R6 R5 R4 R3 R2 600 IC 4N33 1 U3 50089V51RD2FN 1 U1 12000MAX232CP 1 U2 2500 Connector Relimate 2 pin 9 SW1 SW2 SW3 SW4 SW5 4600 L4 L3 L2 L1 Relimate 3 pin 2 J3 J4 Relimate 4 pin 1 J2 2 pin terminal block 1 J1 800 LED LED 3mm green 1 L9 150LED 3mm red 1 L10 150LED 5mm green 4 800LED 5mm red 4 800 IC sockets

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 95

                                                                                                                                                                                              Table 1813Component list for relay card

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                              total 27000

                                                                                                                                                                                              1815 Miscellaneous material

                                                                                                                                                                                              Material Quantity Rate

                                                                                                                                                                                              electronic item

                                                                                                                                                                                              Transformer

                                                                                                                                                                                              TXR1 0-9-15 1 20000

                                                                                                                                                                                              0-9 1A

                                                                                                                                                                                              0-15 100mA

                                                                                                                                                                                              TXR2 0-9 1 16500

                                                                                                                                                                                              0-9 1A

                                                                                                                                                                                              Proximity switch 1 20000

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                              Table 1814Component list for microcontroller card

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              Red push bottom 4 4000

                                                                                                                                                                                              Green push button 1 1000

                                                                                                                                                                                              Red led 5mm 4 800

                                                                                                                                                                                              Green led 5mm 4 800

                                                                                                                                                                                              Led holder 8 1600

                                                                                                                                                                                              Copper clad 2 4000

                                                                                                                                                                                              3 core cable 1 meter 1500

                                                                                                                                                                                              3 pin plug 1 3000

                                                                                                                                                                                              2 pin relimate wire 19 9000

                                                                                                                                                                                              3 pin relimate wire 5 3750

                                                                                                                                                                                              4 pin relimate wire 2 2000

                                                                                                                                                                                              mechanical items

                                                                                                                                                                                              Enclosure 1 25000

                                                                                                                                                                                              Acrylic sheet 2 X 1 30000

                                                                                                                                                                                              12mm cable gland 1 1000

                                                                                                                                                                                              Screw 3mm 33 2000

                                                                                                                                                                                              Screw 35mm 6 2400

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              10 mm spacers 100 1500

                                                                                                                                                                                              10mm insert to stud 50 10000

                                                                                                                                                                                              cable tie 2500

                                                                                                                                                                                              Total 162350

                                                                                                                                                                                              CHAPTER 19

                                                                                                                                                                                              APPENDIX

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                              Table 1815Component list for miscellaneous material

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              APPENDIX

                                                                                                                                                                                              191 APPENDIX

                                                                                                                                                                                              1911 78xx IC datasheet

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              1912 W10 datasheet

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              1913 4n33 IC datasheet

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                              1914 MAX 232

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              CHAPTER 20

                                                                                                                                                                                              CONCLUSION

                                                                                                                                                                                              CONCLUSION

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              201 CONCLUSION

                                                                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                              installed in any business premises

                                                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              CHAPTER 21

                                                                                                                                                                                              IMAGES OF THE

                                                                                                                                                                                              PROJECT

                                                                                                                                                                                              Images of the project

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              CHAPTER 22

                                                                                                                                                                                              BIBILOGRAPHY

                                                                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                                                                              BOOKS

                                                                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                              INTERNET LINKS

                                                                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                              • CHAPTER 1

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                40 pin 1 100016 pin 1 5006 pin 1 400 Misc SIP resistor 1 RN1 200Crystal 110592MHz 1 XL1 500Tack switch 1 S1 200

                                                                                                                                                                                                total 27000

                                                                                                                                                                                                1815 Miscellaneous material

                                                                                                                                                                                                Material Quantity Rate

                                                                                                                                                                                                electronic item

                                                                                                                                                                                                Transformer

                                                                                                                                                                                                TXR1 0-9-15 1 20000

                                                                                                                                                                                                0-9 1A

                                                                                                                                                                                                0-15 100mA

                                                                                                                                                                                                TXR2 0-9 1 16500

                                                                                                                                                                                                0-9 1A

                                                                                                                                                                                                Proximity switch 1 20000

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 96

                                                                                                                                                                                                Table 1814Component list for microcontroller card

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                Red push bottom 4 4000

                                                                                                                                                                                                Green push button 1 1000

                                                                                                                                                                                                Red led 5mm 4 800

                                                                                                                                                                                                Green led 5mm 4 800

                                                                                                                                                                                                Led holder 8 1600

                                                                                                                                                                                                Copper clad 2 4000

                                                                                                                                                                                                3 core cable 1 meter 1500

                                                                                                                                                                                                3 pin plug 1 3000

                                                                                                                                                                                                2 pin relimate wire 19 9000

                                                                                                                                                                                                3 pin relimate wire 5 3750

                                                                                                                                                                                                4 pin relimate wire 2 2000

                                                                                                                                                                                                mechanical items

                                                                                                                                                                                                Enclosure 1 25000

                                                                                                                                                                                                Acrylic sheet 2 X 1 30000

                                                                                                                                                                                                12mm cable gland 1 1000

                                                                                                                                                                                                Screw 3mm 33 2000

                                                                                                                                                                                                Screw 35mm 6 2400

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                10 mm spacers 100 1500

                                                                                                                                                                                                10mm insert to stud 50 10000

                                                                                                                                                                                                cable tie 2500

                                                                                                                                                                                                Total 162350

                                                                                                                                                                                                CHAPTER 19

                                                                                                                                                                                                APPENDIX

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                                Table 1815Component list for miscellaneous material

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                APPENDIX

                                                                                                                                                                                                191 APPENDIX

                                                                                                                                                                                                1911 78xx IC datasheet

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                1912 W10 datasheet

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                1913 4n33 IC datasheet

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                1914 MAX 232

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                1915 ULN2003a IC datasheet

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                CHAPTER 20

                                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                201 CONCLUSION

                                                                                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                installed in any business premises

                                                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                CHAPTER 21

                                                                                                                                                                                                IMAGES OF THE

                                                                                                                                                                                                PROJECT

                                                                                                                                                                                                Images of the project

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                CHAPTER 22

                                                                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                                                                BOOKS

                                                                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                INTERNET LINKS

                                                                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                • CHAPTER 1

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  Red push bottom 4 4000

                                                                                                                                                                                                  Green push button 1 1000

                                                                                                                                                                                                  Red led 5mm 4 800

                                                                                                                                                                                                  Green led 5mm 4 800

                                                                                                                                                                                                  Led holder 8 1600

                                                                                                                                                                                                  Copper clad 2 4000

                                                                                                                                                                                                  3 core cable 1 meter 1500

                                                                                                                                                                                                  3 pin plug 1 3000

                                                                                                                                                                                                  2 pin relimate wire 19 9000

                                                                                                                                                                                                  3 pin relimate wire 5 3750

                                                                                                                                                                                                  4 pin relimate wire 2 2000

                                                                                                                                                                                                  mechanical items

                                                                                                                                                                                                  Enclosure 1 25000

                                                                                                                                                                                                  Acrylic sheet 2 X 1 30000

                                                                                                                                                                                                  12mm cable gland 1 1000

                                                                                                                                                                                                  Screw 3mm 33 2000

                                                                                                                                                                                                  Screw 35mm 6 2400

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 97

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  10 mm spacers 100 1500

                                                                                                                                                                                                  10mm insert to stud 50 10000

                                                                                                                                                                                                  cable tie 2500

                                                                                                                                                                                                  Total 162350

                                                                                                                                                                                                  CHAPTER 19

                                                                                                                                                                                                  APPENDIX

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                                  Table 1815Component list for miscellaneous material

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  APPENDIX

                                                                                                                                                                                                  191 APPENDIX

                                                                                                                                                                                                  1911 78xx IC datasheet

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  1912 W10 datasheet

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  1913 4n33 IC datasheet

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                  1914 MAX 232

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  1915 ULN2003a IC datasheet

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  CHAPTER 20

                                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  201 CONCLUSION

                                                                                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                  installed in any business premises

                                                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  CHAPTER 21

                                                                                                                                                                                                  IMAGES OF THE

                                                                                                                                                                                                  PROJECT

                                                                                                                                                                                                  Images of the project

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  CHAPTER 22

                                                                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                                                                  BOOKS

                                                                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                  INTERNET LINKS

                                                                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                  • CHAPTER 1

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    10 mm spacers 100 1500

                                                                                                                                                                                                    10mm insert to stud 50 10000

                                                                                                                                                                                                    cable tie 2500

                                                                                                                                                                                                    Total 162350

                                                                                                                                                                                                    CHAPTER 19

                                                                                                                                                                                                    APPENDIX

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 98

                                                                                                                                                                                                    Table 1815Component list for miscellaneous material

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    APPENDIX

                                                                                                                                                                                                    191 APPENDIX

                                                                                                                                                                                                    1911 78xx IC datasheet

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    1912 W10 datasheet

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    1913 4n33 IC datasheet

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                    1914 MAX 232

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    1915 ULN2003a IC datasheet

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    1916 89V51RD2 IC datasheet

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    CHAPTER 20

                                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    201 CONCLUSION

                                                                                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                    installed in any business premises

                                                                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    CHAPTER 21

                                                                                                                                                                                                    IMAGES OF THE

                                                                                                                                                                                                    PROJECT

                                                                                                                                                                                                    Images of the project

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    CHAPTER 22

                                                                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                                                                    BOOKS

                                                                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                    INTERNET LINKS

                                                                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                    • CHAPTER 1

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      APPENDIX

                                                                                                                                                                                                      191 APPENDIX

                                                                                                                                                                                                      1911 78xx IC datasheet

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 99

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      1912 W10 datasheet

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      1913 4n33 IC datasheet

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                      1914 MAX 232

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      1915 ULN2003a IC datasheet

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      1916 89V51RD2 IC datasheet

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      CHAPTER 20

                                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      201 CONCLUSION

                                                                                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                      installed in any business premises

                                                                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      CHAPTER 21

                                                                                                                                                                                                      IMAGES OF THE

                                                                                                                                                                                                      PROJECT

                                                                                                                                                                                                      Images of the project

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      CHAPTER 22

                                                                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                                                                      BOOKS

                                                                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                      INTERNET LINKS

                                                                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                      • CHAPTER 1

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        1912 W10 datasheet

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 100

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        1913 4n33 IC datasheet

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                        1914 MAX 232

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        1915 ULN2003a IC datasheet

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        1916 89V51RD2 IC datasheet

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        CHAPTER 20

                                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        201 CONCLUSION

                                                                                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                        installed in any business premises

                                                                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        CHAPTER 21

                                                                                                                                                                                                        IMAGES OF THE

                                                                                                                                                                                                        PROJECT

                                                                                                                                                                                                        Images of the project

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        CHAPTER 22

                                                                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                                                                        BOOKS

                                                                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                        INTERNET LINKS

                                                                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                        • CHAPTER 1

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          1913 4n33 IC datasheet

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 101

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                          1914 MAX 232

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          1915 ULN2003a IC datasheet

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          1916 89V51RD2 IC datasheet

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          CHAPTER 20

                                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          201 CONCLUSION

                                                                                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                          installed in any business premises

                                                                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          CHAPTER 21

                                                                                                                                                                                                          IMAGES OF THE

                                                                                                                                                                                                          PROJECT

                                                                                                                                                                                                          Images of the project

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          CHAPTER 22

                                                                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                                                                          BOOKS

                                                                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                          INTERNET LINKS

                                                                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                          • CHAPTER 1

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            Notes Indicates JEDEC registered data1 The current transfer ratio(ICIF) is the ratio of the detector collector current to the LED input current with VCE 10 V2 Pulse test pulse width = 300μs duty cycle 1048630104863020 3 For test circuit setup and waveforms refer to figure 74 IF adjusted to IC = 20 mA and IC = 07 mA rms5 The frequency at which IC is 3dB down from the 1 KHz value6 For this test LED pins 1 and 2 are common and phototransistor pins 45 and 6 are common

                                                                                                                                                                                                            1914 MAX 232

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 102

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            1915 ULN2003a IC datasheet

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            1916 89V51RD2 IC datasheet

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            CHAPTER 20

                                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            201 CONCLUSION

                                                                                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                            installed in any business premises

                                                                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            CHAPTER 21

                                                                                                                                                                                                            IMAGES OF THE

                                                                                                                                                                                                            PROJECT

                                                                                                                                                                                                            Images of the project

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            CHAPTER 22

                                                                                                                                                                                                            BIBILOGRAPHY

                                                                                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                                                                            BOOKS

                                                                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                            INTERNET LINKS

                                                                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                            • CHAPTER 1

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              1915 ULN2003a IC datasheet

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 103

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              1916 89V51RD2 IC datasheet

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              CHAPTER 20

                                                                                                                                                                                                              CONCLUSION

                                                                                                                                                                                                              CONCLUSION

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              201 CONCLUSION

                                                                                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                              installed in any business premises

                                                                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              CHAPTER 21

                                                                                                                                                                                                              IMAGES OF THE

                                                                                                                                                                                                              PROJECT

                                                                                                                                                                                                              Images of the project

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              CHAPTER 22

                                                                                                                                                                                                              BIBILOGRAPHY

                                                                                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                                                                                              BOOKS

                                                                                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                              INTERNET LINKS

                                                                                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                              • CHAPTER 1

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 104

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                1916 89V51RD2 IC datasheet

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                CHAPTER 20

                                                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                                                CONCLUSION

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                201 CONCLUSION

                                                                                                                                                                                                                The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                installed in any business premises

                                                                                                                                                                                                                The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                a high footfall creating a large number of potential users

                                                                                                                                                                                                                The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                CHAPTER 21

                                                                                                                                                                                                                IMAGES OF THE

                                                                                                                                                                                                                PROJECT

                                                                                                                                                                                                                Images of the project

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                CHAPTER 22

                                                                                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                                                                                BOOKS

                                                                                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                INTERNET LINKS

                                                                                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                • CHAPTER 1

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  1916 89V51RD2 IC datasheet

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 105

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  CHAPTER 20

                                                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                                                  CONCLUSION

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  201 CONCLUSION

                                                                                                                                                                                                                  The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                  hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                  revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                  installed in any business premises

                                                                                                                                                                                                                  The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                  from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                  a high footfall creating a large number of potential users

                                                                                                                                                                                                                  The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                  extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  CHAPTER 21

                                                                                                                                                                                                                  IMAGES OF THE

                                                                                                                                                                                                                  PROJECT

                                                                                                                                                                                                                  Images of the project

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  CHAPTER 22

                                                                                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                                                                                  BOOKS

                                                                                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                  INTERNET LINKS

                                                                                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                  • CHAPTER 1

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 106

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    CHAPTER 20

                                                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                                                    CONCLUSION

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    201 CONCLUSION

                                                                                                                                                                                                                    The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                    hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                    revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                    installed in any business premises

                                                                                                                                                                                                                    The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                    from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                    a high footfall creating a large number of potential users

                                                                                                                                                                                                                    The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                    extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    CHAPTER 21

                                                                                                                                                                                                                    IMAGES OF THE

                                                                                                                                                                                                                    PROJECT

                                                                                                                                                                                                                    Images of the project

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                    fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                    Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    CHAPTER 22

                                                                                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                                                                                    BOOKS

                                                                                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                    INTERNET LINKS

                                                                                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                    • CHAPTER 1

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 107

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      CHAPTER 20

                                                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                                                      CONCLUSION

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      201 CONCLUSION

                                                                                                                                                                                                                      The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                      hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                      revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                      installed in any business premises

                                                                                                                                                                                                                      The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                      from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                      a high footfall creating a large number of potential users

                                                                                                                                                                                                                      The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                      extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      CHAPTER 21

                                                                                                                                                                                                                      IMAGES OF THE

                                                                                                                                                                                                                      PROJECT

                                                                                                                                                                                                                      Images of the project

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                      fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                      Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      Fig 216 Relay driver circuit

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                      Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                      Fig214 Power supply circuit

                                                                                                                                                                                                                      Fig215 Metal detector proximity switch

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      CHAPTER 22

                                                                                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                                                                                      BOOKS

                                                                                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                      INTERNET LINKS

                                                                                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                      • CHAPTER 1

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 108

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        CHAPTER 20

                                                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                                                        CONCLUSION

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        201 CONCLUSION

                                                                                                                                                                                                                        The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                        hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                        revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                        installed in any business premises

                                                                                                                                                                                                                        The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                        from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                        a high footfall creating a large number of potential users

                                                                                                                                                                                                                        The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                        extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        CHAPTER 21

                                                                                                                                                                                                                        IMAGES OF THE

                                                                                                                                                                                                                        PROJECT

                                                                                                                                                                                                                        Images of the project

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                        fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                        Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        Fig 216 Relay driver circuit

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                        Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                        Fig214 Power supply circuit

                                                                                                                                                                                                                        Fig215 Metal detector proximity switch

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        Fig217 Microcontroller circuit

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        CHAPTER 22

                                                                                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                                                                                        BOOKS

                                                                                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                        INTERNET LINKS

                                                                                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                        • CHAPTER 1

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 109

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          CHAPTER 20

                                                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                                                          CONCLUSION

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          201 CONCLUSION

                                                                                                                                                                                                                          The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                          hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                          revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                          installed in any business premises

                                                                                                                                                                                                                          The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                          from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                          a high footfall creating a large number of potential users

                                                                                                                                                                                                                          The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                          extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          CHAPTER 21

                                                                                                                                                                                                                          IMAGES OF THE

                                                                                                                                                                                                                          PROJECT

                                                                                                                                                                                                                          Images of the project

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                          fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                          Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          Fig 216 Relay driver circuit

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                          Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                          Fig214 Power supply circuit

                                                                                                                                                                                                                          Fig215 Metal detector proximity switch

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          Fig217 Microcontroller circuit

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          CHAPTER 22

                                                                                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                                                                                          BOOKS

                                                                                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                          INTERNET LINKS

                                                                                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                          • CHAPTER 1

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            CHAPTER 20

                                                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                                                            CONCLUSION

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 110

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            201 CONCLUSION

                                                                                                                                                                                                                            The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                            hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                            revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                            installed in any business premises

                                                                                                                                                                                                                            The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                            from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                            a high footfall creating a large number of potential users

                                                                                                                                                                                                                            The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                            extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            CHAPTER 21

                                                                                                                                                                                                                            IMAGES OF THE

                                                                                                                                                                                                                            PROJECT

                                                                                                                                                                                                                            Images of the project

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                            fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                            Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            Fig 216 Relay driver circuit

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                            Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                            Fig214 Power supply circuit

                                                                                                                                                                                                                            Fig215 Metal detector proximity switch

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            Fig217 Microcontroller circuit

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            CHAPTER 22

                                                                                                                                                                                                                            BIBILOGRAPHY

                                                                                                                                                                                                                            BIBLIOGRAPHY

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                                                                                            BOOKS

                                                                                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                            INTERNET LINKS

                                                                                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                            • CHAPTER 1

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              201 CONCLUSION

                                                                                                                                                                                                                              The coin-operated mobile phone charger is already successfully installed in

                                                                                                                                                                                                                              hundreds of locations worldwide providing a unique service to the public and a source of

                                                                                                                                                                                                                              revenue for site providers The coin-operated mobile charger can be quickly and easily

                                                                                                                                                                                                                              installed in any business premises

                                                                                                                                                                                                                              The charger offers a unique revenue opportunity for a vast range of businesses ndash

                                                                                                                                                                                                                              from airports to pubs from universities to health clubs virtually any location where there is

                                                                                                                                                                                                                              a high footfall creating a large number of potential users

                                                                                                                                                                                                                              The charger can charge up to 4 different mobile phones simultaneously It will

                                                                                                                                                                                                                              extend low mobile phone talk time provide battery charging

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 111

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              CHAPTER 21

                                                                                                                                                                                                                              IMAGES OF THE

                                                                                                                                                                                                                              PROJECT

                                                                                                                                                                                                                              Images of the project

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                              fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                              Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              Fig 216 Relay driver circuit

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                              Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                              Fig214 Power supply circuit

                                                                                                                                                                                                                              Fig215 Metal detector proximity switch

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              Fig217 Microcontroller circuit

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              CHAPTER 22

                                                                                                                                                                                                                              BIBILOGRAPHY

                                                                                                                                                                                                                              BIBLIOGRAPHY

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                              ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                              221 BIBLIOGRAPHY

                                                                                                                                                                                                                              BOOKS

                                                                                                                                                                                                                              Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                              INTERNET LINKS

                                                                                                                                                                                                                              wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                              PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                              • CHAPTER 1

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                CHAPTER 21

                                                                                                                                                                                                                                IMAGES OF THE

                                                                                                                                                                                                                                PROJECT

                                                                                                                                                                                                                                Images of the project

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 112

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                                fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                                Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                Fig 216 Relay driver circuit

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                                Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                                Fig214 Power supply circuit

                                                                                                                                                                                                                                Fig215 Metal detector proximity switch

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                Fig217 Microcontroller circuit

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                CHAPTER 22

                                                                                                                                                                                                                                BIBILOGRAPHY

                                                                                                                                                                                                                                BIBLIOGRAPHY

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                221 BIBLIOGRAPHY

                                                                                                                                                                                                                                BOOKS

                                                                                                                                                                                                                                Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                INTERNET LINKS

                                                                                                                                                                                                                                wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                • CHAPTER 1

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  211 IMAGES OF THE PROJECT

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 113

                                                                                                                                                                                                                                  fig211 lsquoCoin operated mobile battery charger

                                                                                                                                                                                                                                  Fig212 Circuit arrangement of coin operated mobile battery charger

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  Fig 216 Relay driver circuit

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                                  Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                                  Fig214 Power supply circuit

                                                                                                                                                                                                                                  Fig215 Metal detector proximity switch

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  Fig217 Microcontroller circuit

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  CHAPTER 22

                                                                                                                                                                                                                                  BIBILOGRAPHY

                                                                                                                                                                                                                                  BIBLIOGRAPHY

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                  ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                  221 BIBLIOGRAPHY

                                                                                                                                                                                                                                  BOOKS

                                                                                                                                                                                                                                  Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                  INTERNET LINKS

                                                                                                                                                                                                                                  wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                  PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                  • CHAPTER 1

                                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                    Fig 216 Relay driver circuit

                                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 114

                                                                                                                                                                                                                                    Fig 213 Constant voltage battery charger circuit

                                                                                                                                                                                                                                    Fig214 Power supply circuit

                                                                                                                                                                                                                                    Fig215 Metal detector proximity switch

                                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                    Fig217 Microcontroller circuit

                                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                    Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                    CHAPTER 22

                                                                                                                                                                                                                                    BIBILOGRAPHY

                                                                                                                                                                                                                                    BIBLIOGRAPHY

                                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                    ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                    221 BIBLIOGRAPHY

                                                                                                                                                                                                                                    BOOKS

                                                                                                                                                                                                                                    Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                    INTERNET LINKS

                                                                                                                                                                                                                                    wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                    PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                    • CHAPTER 1

                                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                      Fig217 Microcontroller circuit

                                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 115

                                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                      Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                      CHAPTER 22

                                                                                                                                                                                                                                      BIBILOGRAPHY

                                                                                                                                                                                                                                      BIBLIOGRAPHY

                                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                      ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                      221 BIBLIOGRAPHY

                                                                                                                                                                                                                                      BOOKS

                                                                                                                                                                                                                                      Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                      INTERNET LINKS

                                                                                                                                                                                                                                      wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                      PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                      • CHAPTER 1

                                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                        Fig228 coin operated mobile battery charger project presentation

                                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 116

                                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                        CHAPTER 22

                                                                                                                                                                                                                                        BIBILOGRAPHY

                                                                                                                                                                                                                                        BIBLIOGRAPHY

                                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                        ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                        221 BIBLIOGRAPHY

                                                                                                                                                                                                                                        BOOKS

                                                                                                                                                                                                                                        Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                        INTERNET LINKS

                                                                                                                                                                                                                                        wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                        PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                        • CHAPTER 1

                                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                          CHAPTER 22

                                                                                                                                                                                                                                          BIBILOGRAPHY

                                                                                                                                                                                                                                          BIBLIOGRAPHY

                                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 117

                                                                                                                                                                                                                                          ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                          221 BIBLIOGRAPHY

                                                                                                                                                                                                                                          BOOKS

                                                                                                                                                                                                                                          Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                          INTERNET LINKS

                                                                                                                                                                                                                                          wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                          PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                          • CHAPTER 1

                                                                                                                                                                                                                                            ldquoEMERGENCY COIN OPERATED MOBILE BATTERY CHARGERrdquo

                                                                                                                                                                                                                                            221 BIBLIOGRAPHY

                                                                                                                                                                                                                                            BOOKS

                                                                                                                                                                                                                                            Microprocessor Architecture Programming Applications ndash Gaonkar CMOS Integrated Circuits Data Book ndash Sierra Optoelectronics Handbook ndash National Microprocessor Data Handbook Micro-Controller - Keneth Ayala Electronic Devices Applications amp Integrated Circuits-MathurKulshreshthaChadha Electronic Devices And Circuits - J B Gupta Electronics For You Magazine

                                                                                                                                                                                                                                            INTERNET LINKS

                                                                                                                                                                                                                                            wwwdiscoverprojectscom wwwgooglecom wwwdiscovercircuitscom wwwwikipediacom WWWdatasheetcatlogcom

                                                                                                                                                                                                                                            PVPOLYTECHNIC SNDT University Mumbai-049 Page | 118

                                                                                                                                                                                                                                            • CHAPTER 1

                                                                                                                                                                                                                                              top related